JP2017037009A - Dosimetric method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dosimetric method which allows for effortlessly and quickly measuring radiation dose of a contaminated area over a wide range, and for efficiently measuring radiation dose distribution.SOLUTION: A dosimetric method utilizes a dosimetric tool 10A consisting of an elongate wire 11 extending in a longitudinal direction and a plurality of optically stimulated luminescence dosimeters 12 that are attached to the elongate wire 11 via specific fixing means and spaced apart by a certain distance in the longitudinal direction. The dosimetric tool 10A is spread out in the longitudinal direction in a contaminated area and left there for a predetermined period of time to measure radiation dose distribution in the contaminated area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dosimetry method for measuring a dose in a contaminated area exposed to radiation.

  A telescopic rod having a predetermined length, a plurality of radiation detectors arranged at different distances from the tip end side of the rod, position information acquisition means arranged on the distal end side of the rod, and a detection result by the radiation detector Discloses a portable radiation measurement apparatus formed of a dose based on the measurement data and a measurement data output means for outputting the position information obtained by the position information acquisition means (see Patent Document 1).

JP 2014-209118 A

  The portable radiation measurement apparatus disclosed in Patent Document 1 can integrate individual measurement data such as environmental dose and position information at different ground heights on the spot and display an environmental dose map. Radiation contamination often covers a larger area than that locally, and it is necessary to measure the radiation dose distribution in each area as a premise to derail the radiation contamination in each contaminated area. The radiation dose distribution is not only to investigate the planar dose distribution by measuring the earth, water, etc. in the horizontal direction, but also by measuring the undulations such as buildings, forests, and valleys in the vertical direction. It is necessary to investigate the distribution.

  Conventionally, in the measurement of horizontal and vertical planar or three-dimensional radiation dose distribution, after setting a large number of measurement points in the contaminated area, the measurer measures each measurement point one by one with a radiation measuring instrument. Or, the measurer collects earth soil, bottom mud, part of the building wall or roof, forest tree branches and leaves, mountain valley soil and stone It was measured with a radiation meter. In the conventional measuring method, a huge amount of time and labor are required for the measurement work, and efficient measurement cannot be performed. Moreover, each measurement location could not be measured at the same time, the measurement time at the measurement location was shifted, and the exact dose in the contaminated area could not be measured. Note that even in the portable radiation measurement apparatus disclosed in Patent Document 1, the dose in the contaminated area cannot be measured over a wide range.

  An object of the present invention is to provide a dosimetry method capable of measuring a radiation dose in a contaminated area over a wide range in a short time without exerting labor, and capable of efficiently measuring a radiation dose distribution. is there. Another object of the present invention is to provide a dosimetry method capable of simultaneously measuring doses of radiation in a wide range of a contaminated area and measuring an accurate dose of the contaminated area.

  The premise of the present invention for solving the above-mentioned problems is a dosimetry method for measuring the radiation dose in a contaminated area exposed to radiation.

  The radiation measurement method according to the present invention is characterized in that the dose measurement method is attached to the support member at a predetermined interval in the length direction via a long support member that is long in the length direction and a predetermined fixing means. Using a dosimeter formed from a plurality of passive dosimeters, leave the dosimeter extended in the length direction and leave it in the contaminated area for a predetermined time. It is to measure the dose distribution.

  As an example of the radiation measurement method of the present invention, the dosimeter is extended in the front-rear direction in the contaminated area, and the dosimeter is left in the contaminated area for a predetermined time with these passive dosimeters dispersed in the front-rear direction. These passive dosimeters measure the radiation dose distribution in the horizontal direction of the contaminated area.

  As another example of the radiation measurement method of the present invention, a plurality of dose measuring instruments extended in the front-rear direction are arranged at predetermined intervals in the lateral direction in the contaminated area, and these passive dosimeters are arranged in the front-rear direction and the lateral direction. These dosimeters are allowed to stand in the contaminated area for a predetermined time while being dispersed in the direction, and the dose distribution of the radiation in the horizontal direction of the contaminated area is measured by these passive dosimeters.

  As another example of the radiation measuring method of the present invention, the support member extends in the front-rear direction and extends in the lateral direction with a plurality of first support members arranged with a predetermined distance apart in the lateral direction, and is separated by a predetermined dimension in the front-rear direction. A plurality of second support members arranged side by side, and the intersections of the first and second support members are connected to form a planar net in which the first and second support members extend two-dimensionally. In the measurement method, the first support member is extended in the front-rear direction, the second support member is extended in the horizontal direction, and the passive dosimeters are dispersed in the front-rear direction and the horizontal direction, and the net is set in the contaminated area. Leave for a while and measure the radiation dose distribution in the horizontal direction of the contaminated area with these passive dosimeters.

  As another example of the radiation measurement method of the present invention, the dosimeter is left in the contaminated area for a predetermined time while the dosimeter is extended vertically in the contaminated area and the passive dosimeters are distributed vertically. Then, the radiation dose distribution in the vertical direction of the contaminated area is measured by these passive dosimeters.

  As another example of the radiation measurement method of the present invention, a plurality of dose measuring instruments extended in the vertical direction are arranged at predetermined intervals in at least one of the lateral direction and the front-rear direction in the contaminated area, and these passive types are arranged. With the dosimeters distributed in the vertical, horizontal, and longitudinal directions, leave these dosimeters in the contaminated area for a specified time and measure the radiation dose distribution in the vertical direction of the contaminated area using these passive dosimeters. .

  As another example of the radiation measuring method of the present invention, the dosimeter is hung from the upper side to the lower side in the contaminated area using a predetermined hanging means.

  As another example of the radiation measuring method of the present invention, the suspending means is a long support rod, and one end of the dose measuring tool is connected to the tip of the support rod.

  As another example of the radiation measuring method of the present invention, the hanging means is a drone that hovers over the contaminated area, and one end of the dose measuring tool is connected to the drone.

  As another example of the radiation measuring method of the present invention, a drone includes a reel around which a dose measuring device is wound up so that the dose measuring device can be drawn up and down, and a rotating mechanism that rotates the reel above the contaminated area.

  As another example of the radiation measuring method of the present invention, in the dose measuring instrument, the support member extends in the vertical direction and extends in the horizontal direction with the plurality of first support members arranged in the horizontal direction with a predetermined distance apart. A planar first net formed of a plurality of second support members that are spaced apart from each other by a predetermined dimension, and where the intersections of the first and second support members are connected to each other so that the first and second support members extend two-dimensionally. In the dosimetry method, the first support member is extended in the vertical direction, the second support member is extended in the horizontal direction, and the passive dosimeters are dispersed in the vertical direction and the horizontal direction. One net is left in the contaminated area for a predetermined time, and the dose distribution of radiation in the vertical direction of the contaminated area is measured by these passive dosimeters.

  As another example of the radiation measurement method of the present invention, in the dose measuring instrument, the support member extends in the vertical direction and extends in the horizontal direction with a plurality of first support members arranged in the horizontal direction and the front-back direction with a predetermined distance. A plurality of second support members lined up at a predetermined distance in the front-rear direction and a plurality of third support members extending in the front-rear direction and lined up at a predetermined distance in the vertical direction and the horizontal direction. The intersections of the three support members are connected to form a three-dimensional second net in which the first to third long wires extend three-dimensionally. In the dose measurement method, the first support member is extended in the vertical direction, 2 Extend the support member in the lateral direction and extend the third support member in the front-rear direction, and with the passive dosimeter dispersed in the up-down direction, the front-rear direction, and the lateral direction, the second net is placed in the contaminated area. Leave for a predetermined time and use these passive dosimeters Dose distribution in the vertical direction of the radiation of the dyed area measured.

  As another example of the radiation measurement method of the present invention, the first net or the second net is hung from the upper side to the lower side in the contaminated area using a predetermined hanging means.

  As another example of the radiation measuring method of the present invention, the supporting member is a flexible long wire extending straight in the length direction, and the fixing means is formed by sealing the thermoplastic synthetic resin sheets overlapping each other in a watertight manner. Thus, the passive dosimeter is hermetically sealed, and is formed of a packaging bag that accommodates a weight of a predetermined weight, a long wire, and a connecting wire that connects the packaging bag.

  As another example of the radiation measuring method of the present invention, the packaging bag is made of a thermoplastic synthetic resin film that overlaps each other, and has a first housing portion that seals the passive dosimeter and a second housing portion that houses the weight. And these thermoplastic synthetic resin films extended to the periphery of the 1st and 2nd accommodating part are sealed watertight, and the connection wire is connected with the weight accommodated in the 2nd accommodating part of the packaging bag.

  As another example of the radiation measuring method of the present invention, a long wire is attached to one end and the other end of the long wire so that the ends of the long wire are grounded to the ground surface, or those ends of the long wire A pair of grounding means for grounding the part to the bottom of the water.

  As another example of the radiation measuring method of the present invention, a long wire rod is attached to one end portion and the other end portion thereof, and includes a float that floats on the water surface.

  Another example of the radiation measurement method of the present invention includes a stable weight in which a long wire is attached to one end thereof to increase the weight of the long wire.

  As another example of the radiation measurement method of the present invention, the support member is a flexible long sheet material made of a thermoplastic synthetic resin extending in a straight direction in the length direction, and the fixing means is a length adjacent to the passive dosimeter. A plurality of sealed spaces are formed by sealing the length sheet material and are arranged at a predetermined interval in the length direction, and these stimuliluminescence dosimeters are watertightly and individually sealed in these sealed spaces.

  Another example of the radiation measuring method of the present invention includes a weight having a predetermined weight in which long sheet materials are individually sealed in a sealed space.

  As another example of the radiation measuring method of the present invention, a long sheet material is attached to one end portion and the other end portion thereof, and these end portions of the long sheet material are grounded to the ground surface, or the long sheet material A pair of grounding means for grounding those ends of the bottom to the bottom of the water.

  As another example of the radiation measuring method of the present invention, a long sheet material is attached to one end portion and the other end portion thereof, and includes a float that floats on the water surface.

  Another example of the radiation measurement method of the present invention includes a stable weight in which a long sheet material is attached to one end thereof to increase the weight of the long sheet material.

  As another example of the radiation measurement method of the present invention, the dose measuring instrument includes a long piercing rod that is long in the length direction to be pierced into the ground. In the dose measuring instrument, the long sheet material is pierced in the axial direction of the rod. The long sheet material is fixed to the piercing rod in a state of being stretched in a straight shape, and in the dosimetry method, the dosimeter is left in the ground for a predetermined time with the piercing rod being pierced in the ground of the contaminated area, The radiation dose distribution in the ground is measured by these passive dosimeters.

  As another example of the radiation measuring method of the present invention, the piercing rod displays a scale indicating the piercing length into the ground when the piercing rod is pierced into the ground. While adjusting the piercing length of the piercing rod into the ground.

  As another example of the radiation measurement method of the present invention, the piercing rod is detachably attached with an extendable telescopic rod extending in the axial direction from the upper end portion thereof. Pierce into the existing ground and pierce the rod.

  As another example of the radiation measuring method of the present invention, a long string extending in the axial direction from its upper end is attached to the piercing rod, and a float floating on the water surface is connected to the upper end of the string, In the dosimetry method, the telescopic rod is used to pierce the rod into the bottom of the water, and then the dosimeter is left in the ground for a predetermined time with the float connected to the string floating on the surface of the water. The radiation dose distribution in the ground is measured with a passive dosimeter.

  As another example of the radiation measurement method of the present invention, the passive dosimeter is any one of a photostimulated luminescence dosimeter, a thermoluminescence dosimeter, and a fluorescent glass dosimeter.

  According to the dose measurement method of the present invention, a dose formed from a long support member that is long in the length direction and a plurality of passive dosimeters that are attached to the support member at a predetermined interval in the length direction. Using a measuring device, with the measuring device extended in the length direction, the passive measuring device is dispersed (distributed) at regular intervals in the contaminated area by leaving the measuring device in the contaminated area for a predetermined time. However, since these passive dosimeters measure the radiation dose in the contaminated area over a wide range, it is possible to measure a wide range of dose in the contaminated area in a short period of time without any effort. The dose distribution can be measured efficiently.

  Extend the dosimeter in the front and back direction in the contaminated area, leave the dosimeters in the contaminated area for a specified time with the passive dosimeters dispersed in the front and rear direction, and use the passive dosimeters in the horizontal direction of the contaminated area. The dosimetry method for measuring the dose distribution of radiation is to allow each passive dosimeter to move back and forth in the contaminated area by leaving the dosimeter in the contaminated area for a specified time with the dosimetry instrument extended in the front-rear direction. The dose of radiation in the horizontal direction of the contaminated area is measured by these passive dosimeters while being distributed (distributed) at predetermined intervals in the direction. It is possible to measure the dose distribution of the horizontal plane radiation in the contaminated area efficiently. The dosimetry method can simultaneously measure the radiation dose in the horizontal direction of the contaminated area by these passive dosimeters attached to the support member, and there is no deviation in the measurement time in these passive dosimeters, Accurate dose distribution in the horizontal direction of the contaminated area can be measured.

  A plurality of dosimeters that are stretched in the front-rear direction are arranged at predetermined intervals in the lateral direction in the contaminated area, and these dosimeters are arranged in a state where the passive dosimeters are dispersed in the front-rear direction and the lateral direction. A dosimetry method in which the dose distribution of the radiation in the horizontal direction of the contaminated area is measured with these passive dosimeters after being left in the contaminated area for a predetermined time. By arranging the dosimeters at a predetermined distance in the lateral direction and leaving the dosimeters in the contaminated area for a predetermined time, the passive dosimeters are dispersed (distributed) at predetermined intervals in the contaminated area in the front-rear and lateral directions. The passive dosimeter measures the radiation dose in the horizontal direction of the contaminated area, so the horizontal dose in the contaminated area can be measured over a wide area in a short time without any effort. Planar dose distribution of radiation horizontal direction can be efficiently measured.

  The support members are formed of a plurality of first support members that extend in the front-rear direction and are arranged at a predetermined distance in the lateral direction and a plurality of second support members that extend in the horizontal direction and are arranged at a predetermined distance in the front-rear direction. The intersections of the first and second support members are connected to form a planar net in which the first and second support members spread in two dimensions, the first support member extends in the front-rear direction, and the second support member The net is left in the contaminated area for a predetermined time with the passive dosimeters dispersed in the front-rear and lateral directions, and the dose of radiation in the horizontal direction of the contaminated area is measured by these passive dosimeters. The dosimetry method for measuring the distribution is to leave the net spread in the front-rear direction and the lateral direction in the contaminated area for a predetermined time, so that each passive dosimeter is at a predetermined interval in the front-rear direction and the lateral direction in the contaminated area. While being distributed (distributed) Since the radiation dose in the horizontal direction of the contaminated area is measured by the passive dosimeter, the horizontal dose in the contaminated area can be measured over a wide range in a short time without labor. It is possible to efficiently measure the planar radiation dose distribution.

  The dosimeter is extended in the vertical direction in the contaminated area, and the passive dosimeters are dispersed (distributed) in the vertical direction, and the dosimeter is left in the contaminated area for a predetermined time. In the dosimetry method for measuring the dose distribution of radiation in the vertical direction, each passive dosimeter is contaminated by leaving the dosimeter in the contaminated area for a specified time with the dosimeter extending vertically. Since the dose of radiation in the vertical direction of the contaminated area is measured by these passive dosimeters while being distributed (distributed) in the vertical direction at regular intervals in the area, the vertical dose in the contaminated area is reduced without any effort. It can be measured over a wide range in time, and the dose distribution of radiation in the vertical direction of the contaminated area can be measured efficiently. The dosimetry method can simultaneously measure the dose of radiation in the vertical direction of the contaminated area by these passive dosimeters attached to the support member, and there is no deviation in the measurement time in these passive dosimeters, Accurate dose distribution in the vertical direction of the contaminated area can be measured.

  A plurality of dose measuring instruments extended in the vertical direction are arranged in the contaminated area at a distance of at least one of the horizontal direction and the longitudinal direction, and the passive dosimeters are arranged in the vertical direction, the lateral direction, and the longitudinal direction. The dosimetry method in which these dosimeters are left in the contaminated area for a predetermined time in a dispersed (distributed) state and the dose distribution of radiation in the vertical direction of the contaminated area is measured by these passive dosimeters. By arranging the dosimeters in a state where they are stretched in the vertical direction, spaced apart from each other by a predetermined distance in at least one of the horizontal direction and the front-rear direction, and leaving the dosimeters in the contaminated area for a predetermined time, Since the dose of radiation in the vertical direction of the contaminated area is measured by these passive dosimeters while being dispersed (distributed) in the vertical direction, the lateral direction, and the longitudinal direction in the contaminated area, Pass a short time can be measured in a wide range without the effort dose vertical, planar or dose distribution of a three-dimensional radiation vertical contaminated area can be efficiently measured.

  The dosimetry method in which the dosimeter is hung from the upper side to the lower side in the contaminated area by using the specified suspending means. The dosimeter is suspended in the contaminated area with the dosimetry tool suspended vertically. By leaving it for a predetermined time, the passive dosimeters are dispersed (distributed) in the up and down direction in the contaminated area, or the passive dosimeters are set in the up and down direction, the lateral direction, and the front and back direction in the contaminated area at predetermined intervals. Dispersed (distributed) and passive dosimeters measure the radiation dose in the vertical direction of the contaminated area. By using the suspension means, the vertical dose in the contaminated area can be measured in a short time without any effort. It can be measured over a wide range, and the radiation dose distribution in the vertical direction of the contaminated area can be measured efficiently.

  The dose measuring method in which the suspending means is a long support rod and one end of the dose measuring tool is connected to the tip of the support rod is a method of hanging the dose measuring tool in the vertical direction via the long support rod. By leaving it in the contaminated area for a predetermined time in a lowered state, the passive dosimeters are distributed (distributed) in the up and down direction at predetermined intervals in the contaminated area, or the passive dosimeters are vertically and horizontally in the contaminated area. Since the radiation dose in the vertical direction of the contaminated area is measured by a passive dosimeter, the dose in the vertical direction of the contaminated area can be measured by using a long gutter. A wide range of measurements can be performed in a short time without labor, and the dose distribution of radiation in the vertical direction of the contaminated area can be measured efficiently.

  The drone that hovers over the contaminated area and the one end of the dosimeter is connected to the drone. The dosimetry method uses the drone to hover the drone over the contaminated area. The dosimeter is suspended in the vertical direction and left in the contaminated area for a predetermined time, so that the passive dosimeters are dispersed (distributed) in the vertical direction at a predetermined interval in the contaminated area. Since the dose of radiation is measured, the drone can be used to measure the vertical dose in the contaminated area in a short time without effort, and the dose distribution of the vertical radiation in the contaminated area Can be measured efficiently. In the radiation measurement method, the drone can be blown to dangerous places or places with high doses that the measurer cannot enter, and the vertical dose of those places can be measured using the drone, ensuring the safety of the measurer. However, it is possible to measure the dose distribution of the radiation in the vertical direction at a dangerous spot or a high dose spot.

  The dosimetry method was installed in a drone that hovered over the contaminated area. The dosimetry method was equipped with a reel on which the drone was wound up so that the dosimeter could be drawn up and down, and a rotating mechanism that rotated the reel over the contaminated area. By lifting the dosimeter from the reel up and down, the dosimeter can be hung up and down from any height in the contaminated area, and using a drone reduces the dose in the vertical direction of the contaminated area. A wide range of measurements can be made in a short time without applying. In the radiation measurement method, after the measurement is completed, the dosimeter can be wound on a reel, and the drone can be landed at a predetermined position, so that the dosimeter can be safely used together with the drone without the hindrance. It can be recovered.

  The support members are formed of a plurality of first support members extending in the vertical direction and arranged at a predetermined distance in the horizontal direction and a plurality of second support members extending in the horizontal direction and arranged at a predetermined distance in the vertical direction. The crossing points of the first and second support members are connected to form a first planar net in which the first and second support members expand two-dimensionally, the first support member extends in the up-down direction, and the second The support member is extended in the lateral direction, the first net is left in the contaminated area for a predetermined time with the passive dosimeters dispersed in the vertical and lateral directions, and the vertical direction of the contaminated area by these passive dosimeters. The dosimetry method for measuring the dose distribution of radiation is to leave the first net spread in the vertical and horizontal directions in the contaminated area for a predetermined time so that each passive dosimeter is Dispersion (distribution) in the horizontal direction However, since these passive dosimeters measure the radiation dose in the vertical direction of the contaminated area, the vertical dose in the contaminated area can be measured over a wide range in a short time without any effort. The dose distribution of the planar radiation in the vertical direction can be measured efficiently.

  A plurality of first support members that extend in the vertical direction and are arranged at a predetermined distance apart in the lateral direction and the front-rear direction, and a plurality of second support members that extend in the horizontal direction and are arranged at a predetermined distance in the front-rear direction. A plurality of third support members that extend in the front-rear direction and are arranged at predetermined intervals in the up-down direction and the lateral direction, and are connected to the intersections of the first to third support members to form the first to third long members. The wire rod forms a three-dimensional second net that spreads in three dimensions, extends the first support member in the vertical direction, extends the second support member in the horizontal direction, and extends the third support member in the front-rear direction. The second net is left in the contaminated area for a predetermined time with the passive dosimeters dispersed in the vertical direction, the front-rear direction, and the horizontal direction, and the dose distribution of the radiation in the vertical direction of the contaminated area by the passive dosimeters. Dosimetry method to measure the vertical direction By leaving the second net spread in the lateral direction and the longitudinal direction in the contaminated area for a predetermined time, each passive dosimeter is dispersed (distributed in the contaminated area in the vertical direction, the lateral direction, and the longitudinal direction at predetermined intervals. However, these passive dosimeters measure the radiation dose in the horizontal and vertical directions in the contaminated area, so the horizontal and vertical doses in the contaminated area can be measured over a wide range in a short time without any effort. It is possible to efficiently measure the three-dimensional radiation dose distribution in the horizontal and vertical directions of the contaminated area.

  The dose measurement method for suspending the first net or the second net from the upper side to the lower side in the contaminated area using the predetermined suspending means is a state in which the dose measuring device is suspended vertically through the suspending means. The passive dosimeters are dispersed (distributed) at predetermined intervals in the contaminated area in the up and down direction and the horizontal direction, or the passive dosimeters are vertically and horizontally in the contaminated area. The radiation dose in the vertical direction of the contaminated area is measured by a passive dosimeter, and the vertical dose in the contaminated area can be measured by using a suspension means. A wide range of measurements can be performed in a short time without any effort, and the dose distribution of the planar or three-dimensional radiation in the vertical direction of the contaminated area can be efficiently measured.

  The support member is a flexible long wire that extends straight in the length direction, and the fixing means is formed by sealing the thermoplastic synthetic resin sheets that overlap each other. The dosimetry method formed from the packaging bag that contains the weight, the long wire, and the connecting wire that connects the packaging bag, the dosimeter in the state where the long wire is extended in the front-rear direction and the up-down direction. The passive dosimeters connected to the long wires through the connecting wires are dispersed in the front and back direction and the up and down direction in the contaminated area, and the passive dosimeters sealed in the packaging bags are used. Since the dose in the horizontal and vertical directions of the contaminated area is measured, the dose in the contaminated area can be measured over a wide range in a short time without effort, and the planar or three-dimensional radiation in the contaminated area can be measured. It can be measured dose distribution efficiently. The dosimetry method is to prevent moisture from entering the packaging bag because the packaging bag is made by sealing the thermoplastic synthetic resin sheets in a watertight manner when the dosimeter is used in water or rain. It is possible to prevent measurement errors and malfunctions of passive dosimeters due to the ingress of moisture into the packaging bag, and to reliably and accurately measure horizontal and vertical doses in contaminated areas in water and rain. .

  The packaging bag is made of a thermoplastic synthetic resin film that overlaps each other, and has a first housing portion that seals the passive dosimeter and a second housing portion that houses the weight, and extends to the peripheral edges of the first and second housing portions. A dose measuring method in which the thermoplastic synthetic resin films are sealed in a watertight manner and the connecting wire is connected to a weight accommodated in the second accommodating portion of the packaging bag is a weight measuring method accommodated in the second accommodating portion of the packaging bag. The passive dosimeter sealed in the first container of the packaging bag can be stopped on the ground or submerged in the water, and the planar dose in the contaminated area such as the ground or the bottom of the water can be measured reliably. be able to. The dose measurement method can prevent the passive dosimeter sealed in the first housing part of the packaging bag from moving in the air by the weight housed in the second housing part of the packaging bag, It is possible to reliably measure the vertical dose of contaminated areas of undulations such as In the dose measurement method, when the dose measuring tool is used in water or rain, the peripheral edge of the second housing portion is sealed in a watertight manner, so that water can be prevented from entering the second housing portion. It can prevent measurement errors and malfunctions of passive dosimeters caused by water entering, and reliably and accurately measure horizontal and vertical planar or three-dimensional doses in contaminated areas in water and rain. Can do.

  Dose including a pair of grounding means for attaching a long wire to one end and the other end thereof to ground the ends of the long wire to the ground surface, or to ground the ends of the long wire to the bottom of the water In the measurement method, the end of the long wire can be fixed to the ground surface by the grounding means attached to one end and the other end of the long wire. Therefore, it is possible to prevent inadvertent movement of the dose measuring tool when left unattended, and to reliably measure a planar dose on the ground. The dosimetry method is to ground the end of the long wire to the bottom of the water by grounding means attached to one end and the other end of the long wire, and sink the passive dosimeter of the dosimetry tool to the bottom of the water. Therefore, inadvertent movement of the dosimeter when the dosimeter is left in the contaminated area can be prevented, and the planar dose at the bottom of the water can be reliably measured.

  The dosimetry method including a float that is attached to one end and the other end of the long wire and floats on the surface of the water is that the float connected to the one end and the other end of the long wire floats on the surface of the water. Thus, the float can serve as a mark for knowing the position of the dose measuring tool that has been submerged in the water, and the dose measuring tool that has finished measuring the dose can be easily lifted out of the water using the float.

  A dosimetry method that includes a stable weight attached to one end of the long wire to increase the weight of the long wire, with the long wire in the state that the stable weight connected to one end of the long wire is down. When suspended vertically, stable weights prevent long wires from floating in the air, and each passive dosimeter ensures the vertical dose in the contaminated areas of buildings, forests and valleys. Can be measured.

  It is a flexible long sheet material made of thermoplastic synthetic resin that extends straight in the length direction, and the fixing means is made by sealing the long sheet material adjacent to the passive dosimeter in the length direction. The dosimetry method is a plurality of sealed spaces lined up at predetermined intervals to each other, and these dosimeters are individually sealed in the sealed space. By leaving the measured dose measuring device in the contaminated area for a predetermined time, each passive dosimeter sealed in the sealed space of the long sheet material is dispersed in the contaminated area in the front-rear direction and the vertical direction. The dosimeter measures the dose in the horizontal and vertical directions of the contaminated area, so the dose in the contaminated area can be measured over a wide area in a short time without any effort. Dose distribution of rays can be efficiently measured. The dosimetry method can prevent moisture from entering the sealed space because the sealed space is created by sealing the thermoplastic synthetic resin sheets when the dosimeter is used in water or rain. Measurements and failures of passive dosimeters due to moisture entering the sealed space can be prevented, and the horizontal and vertical planar or three-dimensional dose of the contaminated area can be measured reliably and accurately in water and rain. can do.

  A dosimetry method that includes a weight of a predetermined weight, in which a long sheet material is individually sealed in a sealed space, and a passive dosimeter sealed in the sealed space by a weight sealed individually in the sealed space. Since the passive dosimeter sealed in the sealed space can be prevented from moving in the air, the vertical planar or three-dimensional dose of the contaminated area can be reliably measured.

  A pair of grounding means for attaching a long sheet material to one end and the other end thereof to ground those ends of the long sheet material to the ground surface, or to ground these ends of the long sheet material to the water bottom. The dosimetry method includes a grounding means attached to one end and the other end of the long sheet material so that the end portions of the long sheet material can be fixedly grounded to the ground surface. Can prevent inadvertent movement of the dosimeter when it is left on the ground in a contaminated area, and can reliably measure the horizontal dose on the ground. In the dosimetry method, grounding means attached to one end and the other end of the long sheet material are used to ground those ends of the long sheet material to the bottom of the water, and the passive dosimeter of the dosimeter is placed on the bottom of the water. Since it can be submerged, it is possible to prevent inadvertent movement of the dosimeter when it is left in the contaminated area, and the horizontal dose at the bottom of the water can be reliably measured.

  The dosimetry method includes a float that is attached to one end and the other end of the long sheet material and floats on the water surface. The float attached to one end and the other end of the long sheet material floats on the water surface. By doing so, the float becomes a mark for knowing the position of the dose measuring tool that has submerged in the water, and the dose measuring tool that has finished measuring the dose can be easily lifted from the water using the float.

  A dosimetry method that includes a stable weight attached to one end of the long sheet material to increase the weight of the long sheet material is long with the stable weight connected to one end of the long sheet material down. When suspended in the vertical direction, the stable weight can prevent the long sheet material from floating in the air. Dosimeters can be used to prevent contamination of undulating areas such as buildings, forests, and valleys. The dose in the vertical direction can be reliably measured.

  The long sheet material is fixed to the piercing rod in a state in which the dosimeter includes a piercing rod that is long in the length direction that pierces into the ground, and the long sheet material is pierced and extended straight in the axial direction of the rod. The dosimetry method is to leave the dosimeter in the ground for a specified time with the piercing rod pierced into the contaminated area, and measure the radiation dose distribution in the ground using these passive dosimeters. By piercing into the ground, each stimulated luminescence dosimeter sealed in the sealed space of the long sheet material with the long sheet material enters the ground, and the piercing rod is left in the ground of the contaminated area for a predetermined time. Then, while each stimulated luminescence dosimeter is dispersed (distributed) at a predetermined interval in the ground, the radiation dose in the ground is measured by these stimulated luminescence dosimeters. The dose in the can be measured in a short time without the labor, the dose distribution of the radiation in the ground in the depth direction of the contaminated area can be efficiently measured. In the dosimetry method, the radiation dose in the ground can be measured simultaneously by these passive dosimeters fixed to the piercing rod, and there is no deviation in the measurement time in these passive dosimeters. Accurate dose distribution can be measured.

  The scale indicating the piercing length into the ground when the piercing rod is pierced into the ground is displayed on the piercing rod, and the dosimetry method for adjusting the piercing length of the piercing rod into the ground while visually checking the scale is , You can see the depth of penetration into the ground when you stab the piercing rod into the ground with the scale, you can know the depth of measurement into the ground, and the depth of the underground where these passive dosimeters are located In addition to being able to know, the position of the passive dosimeter in the ground can be specified.

  A telescopic rod extending in the axial direction from the upper end of the piercing rod is detachably attached to the piercing rod, and the dosimetry method for piercing the piercing rod into the ground existing deeply using the telescopic rod can descend. If you want to pierce the rod from the surface of the ground that cannot be deeply penetrated, or if you want to pierce the rod into the ground of deep water underwater where the water depth is deep, you can use the telescopic rod to pierce the rod without descending to the ground surface. Can be stabbed into the ground from the bottom, and the stab rod can be stabbed into the ground from the bottom without being submerged in water, so that the radiation dose distribution in the ground can be easily measured.

  A long string extending in the axial direction from the upper end of the piercing rod is attached to the piercing rod, a float that floats on the surface of the water is connected to the upper end of the string, and the piercing rod is pierced into the ground of the bottom of the water using a telescopic rod. After that, the dosimetry method in which the dosimeter connected to the string is floated on the surface of the water and the dosimeter is left in the ground for a predetermined time, and the radiation dose distribution in the ground is measured with these passive dosimeters. A marker to know the position of the dosimetry device where the float has submerged in the water, after the rod has been pierced into the deep water depth of the deep water and the rod connected to the tip of the string rises to the surface of the water. Thus, the position of the dose measuring tool can be known by the float, and the dose measuring tool for which the dose measurement has been completed can be easily lifted from the water using a string.

  The dosimetry method in which the passive dosimeter is any one of a photostimulated luminescence dosimeter, a thermoluminescence dosimeter, and a fluorescent glass dosimeter is a photostimulated luminescence dosimeter, a thermoluminescence dosimeter, and a fluorescent glass dosimeter. By leaving the attached dosimeter in the contaminated area for a predetermined time, the photostimulated luminescence is dispersed (distributed) at predetermined intervals in the contaminated area while the photostimulated luminescence dosimeter, thermoluminescence dosimeter, and fluorescent glass dosimeter are dispersed (distributed) in the contaminated area. Dosimeters, thermoluminescence dosimeters, and fluorescent glass dosimeters measure the dose of radiation in a contaminated area over a wide range, so that a wide range of doses in a contaminated area can be measured in a short time without any effort. The radiation dose distribution in the area can be measured efficiently.

The top view of the dose measuring method shown as an example. The side view of the dose measuring method shown in FIG. The front view which shows an example of the dose measuring tool used for the dose measuring method. The perspective view of the photostimulation luminescence dosimeter shown as an example. The enlarged view which shows the light stimulation luminescence dosimeter accommodated in the packaging bag among the dose measuring tools of FIG. 3, a weight, and a connection wire. FIG. 6 is an end view taken along line AA in FIG. 5. The front view of the reel which wound up the dose measuring tool. The top view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The side view of the dose measuring method shown in FIG. The front view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The front view of the dose measuring method shown in FIG. The side view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The side view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The front view of the dose measuring tool shown as another example. The enlarged view which shows the photostimulation luminescence dosimeter accommodated in the packaging bag among the dose measuring tools of FIG. 14, a weight, and a connection wire. The BB line end view of FIG. The front view of the dose measuring tool shown as another example. The perspective view of the dose measuring tool shown as another example. The front view of the dose measuring tool shown as another example. The enlarged view which shows the photostimulation luminescence dosimeter accommodated in the sealed space. The CC end view of FIG. FIG. 20 is a top view showing an example of a radiation dose measuring method using the dose measuring tool of FIG. 19. The front view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The side view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The side view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The front view of the dose measuring tool shown as another example. The enlarged view which shows the light stimulation luminescence dosimeter accommodated in the sealed space, and a weight. The DD line end view of FIG. FIG. 27 is a top view showing another example of a radiation dose measuring method using the dose measuring tool of FIG. 26. The front view of the dose measuring tool shown as another example. The perspective view of the dose measuring tool shown as another example. The perspective view of the dose measuring tool shown as another example. The perspective view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. The perspective view of the dose measuring tool shown as another example. The perspective view which shows another example of the radiation dose measuring method using the dose measuring tool of FIG. FIG. 36 is a perspective view of the radiation dose measuring method continued from FIG. 35.

  The details of the dose measurement method according to the present invention will be described with reference to the accompanying drawings such as FIG. 1 which is a top view of the dose measurement method shown as an example. 2 is a side view of the dose measuring method shown in FIG. 1, and FIG. 3 is a front view showing an example of a dose measuring tool 10A used for the dose measuring method. 4 is a perspective view of a photostimulated luminescence dosimeter 12 shown as an example, and FIG. 5 is a diagram of a photostimulated luminescence dosimeter 12 housed in a packaging bag 14 of the dose measuring tool 10A of FIG. 13 is an enlarged view showing the connecting wire 14. FIG. 6 is an end view taken along line AA in FIG. 5, and FIG. 7 is a front view of the reel 16 around which the dose measuring tool 10A is wound.

  1 and 2 show a case where a horizontal dose (dose distribution) of a ground surface 33 of a ground 32 (plain field, ground, etc.) in a contaminated area exposed to radiation is measured. In the following description of the dosimetry method, the light-stimulated luminescence dosimeter 12 is illustrated as a passive dosimeter (passive-type dosimeter). A thermoluminescent dosimeter (TLD) (not shown) or a fluorescent glass dosimeter (not shown) can be used.

  A dose measuring tool 10A used for the dose measuring method includes a single flexible long wire 11 (long supporting member) extending straight in the length direction, a plurality of photostimulated luminescence dosimeters 12, and A plurality of weights 13, a plurality of packaging bags 14 (fixing means) for housing the light-stimulated luminescence dosimeter 12 and the weight 13, and a plurality of connecting wires 15 (fixing) for connecting the long wire 11 and the packaging bag 14. Means).

  Although the long wire 11 uses an elongated wire, not only a wire but also an elongated string can be used. There is no restriction | limiting in particular about the raw material of a wire, All the existing types of wires, such as a metal wire and a synthetic resin wire, can be utilized. Moreover, there is no restriction | limiting in particular also about the raw material of a string, All the existing types of strings can be utilized. The length dimension in one direction of the long wire 11 is not particularly limited, and the length dimension (for example, a range of 3 to 300 m) of the long wire 11 can be freely selected according to the area and height of the contaminated area to be measured. You can choose. The dose measuring instrument 10A (the long wire 11, the light-stimulated luminescence dosimeter 12, the weight 13, the packaging bag 14, and the connecting wire 15) is wound around the reel 16 so that it can be fed out (see FIG. 7).

  As shown in FIG. 4, these photostimulated luminescence dosimeters 12 are formed into a flat plate shape, and the planar shape is formed into a rectangular shape. In addition, there is no restriction | limiting in particular in the shape, The dosimeter 12 of another shape can also be used. The photostimulated luminescence dosimeter 12 has a vertical dimension in the range of 5 to 10 mm, a horizontal dimension in the range of 5 to 10 mm, and a thickness dimension in the range of 1 to 4 mm. Have On the surface 17 of the light-stimulated luminescence dosimeter 12, a seal 19 displaying a number (NO1 in FIG. 4) for specifying the dosimeter 12 is attached. In addition, a number is given for every dosimeter 12 with a serial number.

  The photostimulated luminescence dosimeter 12 utilizes stimulated light emission that emits light when a predetermined substance (for example, aluminum oxide) is irradiated with radiation and then irradiated with light having a wavelength of 530 nm or longer. The light-stimulated luminescence dosimeter 12 irradiates the material forming it with radiation, and then irradiates the material with light, whereby the electrons in the F center are released and recombined with the luminescence center to cause a light emission phenomenon. Since the amount of emitted light is proportional to the dose of radiation that has been exposed, dose measurement is possible. Although the F center gradually decreases by reading the dose, the same substance can be repeatedly measured a plurality of times by controlling the amount of stimulation light.

Carbon-added α-aluminum oxide (α-Al ₂ O ₃ : C) is used as the substance of the light-stimulated luminescence dosimeter 12 using this phenomenon. As the light-stimulated luminescence dosimeter 12, a plastic sheet coated with carbon-added α-aluminum oxide powder is used. The carbon-added α-aluminum oxide is a substance suitable for dosimetry because it does not emit light due to stimuli other than radiation, and a blue (420 nm) light-emitting phenomenon is observed when irradiated with radiation.

  In addition, since carbon-added α-aluminum oxide has strong fading characteristics due to visible light, the dosimeter can be easily initialized (annealed) by using a visible light source with high luminance. Carbon-added α-aluminum oxide is a substance with small energy characteristics relative to photons, but when used as a dosimeter, it uses a metal filter (such as tin or copper) for energy compensation to improve energy characteristics. . The photostimulated luminescence dosimeter 12 can measure from a low dose of 0.01 mSv (X-ray, γ-ray) to a high dose of 10 MeV (X-ray, γ-ray).

  The thermoluminescence dosimeter measures the radiation dose by measuring the amount of visible light emitted from the crystal by the thermoluminescence reaction when the crystal inside the detector is heated. For the crystal, potassium fluoride, lithium fluoride, lithium metaborate or the like is used. In thermoluminescence dosimeters, when radiation interacts with the crystal, electrons in the crystal's atoms jump out to higher energy levels and are trapped and heated due to impurities (mostly manganese) in the crystal. Stays in crystals. By heating the crystal, the electrons fall to the ground level, but at that time, photons of a specific frequency are emitted. Since the amount of emitted light depends on the dose of exposed radiation, the exposed dose can be known by measuring the luminous intensity.

  The fluorescent glass dosimeter is a dosimeter using a phenomenon (radiophotoluminescence: RPL) in which glass irradiated with radiation emits orange fluorescence when excited by ultraviolet rays. When silver-activated phosphate glass is irradiated with ionizing radiation and then excited with ultraviolet light, it emits orange fluorescence. Since the amount of fluorescence is proportional to the dose of radiation, the exposed dose can be determined by measuring the amount of fluorescence.

  The weight 13 is made of lead and has a weight in the range of 10 to 100 g. The weight 13 increases the weight of the packaging bag 14 and prevents inadvertent movement of the packaging bag 14. The weight 13 has a rectangular shape in plan view. A hook 20 is attached to one end portion of the weight 13, and one end portion of the salcan 21 is engaged with the hook 20, and the weight 13 is connected to the salcan 20. In addition, there is no restriction | limiting in particular in the shape of the weight 13, The weight 13 of all shapes can be used.

  These packaging bags 14 are made of thermoplastic synthetic resin sheets 22 (films) that overlap each other, and have front and back surfaces 23 and 24 of a predetermined area, the size of which is that of the photostimulated luminescence dosimeter 12 or the weight 13. Is also big. As shown in FIG. 5, the packaging bag 14 is formed into a rectangular planar shape, and includes a first housing portion 25 that houses the light-stimulated luminescence dosimeter 12, and a second housing portion that houses the weight 13 and the salcan 21. 26. In addition, there is no restriction | limiting in particular in the shape of the packaging bag 14, The packaging bag 14 of another shape can also be used.

  In the packaging bag 14, the thermoplastic synthetic resin sheet 22 extending to both end edges 27 (periphery) and both side edges 28 (periphery) of the first and second storage portions 25, 26 is sealed (welded) in a watertight manner. Yes. In one packaging bag 14, one light-stimulated luminescence dosimeter 12 is sealed in a watertight manner in the first housing portion 25, and one weight 13 is housed in the second housing portion 26. In the 1st accommodating part 25 of the packaging bag 14, the penetration | invasion of a water | moisture content is blocked | prevented. On the surface 23 of the packaging bag 14, two thermoplastic synthetic resin sheets 22 overlap each other, and the surface 17 of the photostimulated luminescence dosimeter 12 faces the sheets 22. On the back surface 24 of the packaging bag 14, two thermoplastic synthetic resin sheets 22 overlap each other, and the back surface 18 of the photostimulated luminescence dosimeter 12 faces the sheets 22. Note that three or more thermoplastic synthetic resin sheets 22 may form the front and back surfaces 23 and 24 of the packaging bag 14.

  As the thermoplastic synthetic resin sheet 22 (film), all existing thermoplastic synthetic resin sheets such as a polypropylene sheet (film), a polyethylene sheet (film), a vinylon sheet (film), and a regenerated cellulose sheet (film) are used. be able to. The sealing of the thermoplastic synthetic resin sheet 22 includes heat sealing using a heat sealing machine and ultrasonic sealing using an ultrasonic sealing machine. The packaging bag 14 may be made by laminating with a laminate film.

  As these connecting wires 15, when the long wire 11 is a metal wire, the wire 15 made from the same metal is used, and when the long wire 11 is a synthetic resin wire, the same composite It is preferable to use a wire 15 made of resin. A connecting wire 15 made of a material different from the long wire 11 can be used. One connecting wire 15 extends between the long wire 11 and one packaging bag 14, and the long wire 11 and one packaging bag 14 are connected (connected) by the connecting wire 15.

  When the long wire 11 is a metal wire and the connecting wire 15 is made of the same metal as the wire (for example, a wire), one end of the connecting wire 15 is fixed to the periphery of the wire by welding, or The one end of the connecting wire 15 is fixed to the periphery of the wire by a hot melt adhesive, or the one end of the connecting wire 15 is firmly connected to the periphery of the wire to be fixed to the wire (long wire 11). . The other end of the connecting wire 15 enters the second housing portion 26 of the packaging bag 14, and the other end of the connecting wire 15 is fixed to the other end of the salcan 21 by welding, or the other end of the connecting wire 15. Is firmly attached to the other end portion of the salcan 21, thereby being fixed to the salcan 21.

  When the long wire 11 is a metal wire or a synthetic resin wire and the connecting wire 15 is made of a synthetic resin, one end of the connecting wire 15 is fixed to the periphery of the wire by heat welding, or One end of the connecting wire 15 is fixed to the periphery of the wire with a hot melt adhesive or other adhesive, or one end of the connecting wire 15 is firmly connected to the periphery of the wire (the long wire 11). Fixed to. The other end of the connecting wire 15 enters the second housing portion 26 of the packaging bag 14, and the other end of the connecting wire 15 is fixed to the other end of the salcan 21 by hot melt adhesive, other adhesive, or heat welding. Alternatively, the other end portion of the connecting wire 15 is firmly attached to the other end portion of the salcan 21 so as to be fixed to the salcan 21.

  In the dose measuring tool 10 </ b> A, these connecting wires 15 are attached in the length direction of the long wire 11 with a predetermined spacing (equal spacing). Therefore, the photostimulated luminescence dosimeters 12 sealed in the packaging bag 14 are arranged at predetermined intervals (equal intervals) in the length direction of the long wire 11. In addition, there is no restriction | limiting in particular in the separation dimension L1 in the length direction of the light-stimulated luminescence dosimeters 12 adjacent to the length direction, and the separation dimension L1 (for example, 10 according to the area and height of the contamination location which measures a dose) Can be set arbitrarily.

  In the dose measuring method shown in FIGS. 1 and 2, a grounding weight 31 (grounding means) is connected to one end 29 and the other end 30 of the long wire 11. The grounding weight 31 grounds the end portions 29 and 30 of the long wire 11 to the ground surface 33 of the ground 32 in the contaminated area. In addition to the ground weight 31, the grounding means may be a pin attached to the end portions 29 and 30 of the long wire 11 and piercing the ground surface 33 or a screw rod screwed to the ground surface.

  The reel 16 on which the dose measuring tool 10A (long wire 11) is wound is transported to the ground 32 in the contaminated area (measurement area), and the dose measuring tool 10A (long wire 11) is fed out from the reel 16 so that the long wire 11 is removed. It is cut into a predetermined length and divided into a plurality of dose measuring tools 10A. Next, the grounding weight 31 is attached to the one end portion 29 and the other end portion 30 of the long wire 11 of the dose measuring tool 10A, and the long wire 11 is extended in the front-rear direction (length direction) (extended). In such a state, the dose measuring tools 10A are placed on the ground surface 33 of the ground 32, and the dose measuring tools 10A are arranged on the ground surface 33 in the lateral direction intersecting the front-rear direction as shown in FIG.

  When the dose measuring tool 10A is placed on the ground surface 33 of the ground 32, the dose measuring tool 10A undulates along the unevenness of the ground surface 33, and a plurality of photostimulated luminescence dosimeters 12 are Dispersed (distributed) at substantially equal intervals. In addition, the seal | sticker 19 which described the number (serial number) is affixed on the surface 17 of each photostimulation luminescence dosimeter 12, and while the photostimulation luminescence dosimeter 12 is specified by the number, photostimulation luminescence is carried out. The measurement location (measurement location) placed on the ground surface 33 of the dosimeter 12 is recorded together with its number.

  In these dosimeters 10 </ b> A, the front surface 23 or the back surface 24 of the packaging bag 14 is grounded to the ground surface 33, and the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12 is grounded to the ground surface 33 via the packaging bag 14. Radiation is irradiated from the surface 33 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. In these dose measuring devices 10A, the ground weight 31 can prevent the long wire 11 from inadvertently moving on the ground 32, and the weight 13 accommodated in the second accommodating portion 26 of the packaging bag 14 allows the light-stimulated luminescence. The dosimeter 12 can be stationary on the ground surface 33 of the ground 32, and the dose in the horizontal direction on the ground 32 can be reliably measured.

  After these dose measuring tools 10A are left on the surface 33 of the ground 32 for a predetermined time (after the measurement time has elapsed), each dose measuring tool 10A is collected. The leaving time of the dose measuring instrument 10A varies depending on the dose of the ground surface 33 in the contaminated area, the leaving time for the high dose area is short, about several hours, and the leaving time for the low dose area is long, about several days. . The collected dose measuring device 10A is sorted for each area (each place) of the earth 32, and the photostimulated luminescence dosimeter 12 is taken out from the packaging bag 14, and each photostimulated luminescence dosimeter 12 is Installed in a dose reading device (not shown) in numerical order. The dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by a dose reading device.

  In addition, when using a thermoluminescence dosimeter, the dose of the radiation irradiated to the thermoluminescence dosimeter is also taken by the TLD reader. When a fluorescent glass dosimeter is used, the dose of radiation applied to the fluorescent glass dosimeter is read by a glass dosimeter reader using an ultraviolet pulse laser.

In the dose reading device, green light such as ultra-bright green LED, CW-GreenLaser, Nd: YAG Laser (532 nm) is used as a light source for stimulation. The blue light emission obtained by irradiating stimulation light to carbon-added α-aluminum oxide (α-Al ₂ O ₃ : C) is separated from the stimulation light through an appropriate band-pass filter and band-cut filter, Only the amount of blue luminescence is detected by a photomultiplier tube. Data processing is performed on the amount of blue emission detected by the photomultiplier tube using a computer attached to the dose reading device, and the dose is converted into a radiation dose.

  Although not shown, a measurement image indicating the measurement result is displayed on the computer display. As an example of the measurement image, a planar topographic map (bird's eye view) showing the topography of the ground 32 in the contaminated area (measurement area) and a side view showing the side shape of the ground 32 are displayed. Each measurement location (the ground contact location of the photostimulated luminescence dosimeter 12) is displayed, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. The measurement image is output by a printer. By looking at the measurement image, the horizontal planar dose of radiation on the ground 32 in the contaminated area (measurement area) can be known in a wide range.

  The dose measuring method shown in FIGS. 1 and 2 using the dose measuring tool 10A is a plurality of dose measuring tools 10A in a state where the long wire 11 forming the dose measuring tool 10A is extended in the front-rear direction (length direction). Are arranged at a predetermined interval in the horizontal direction, and these dose measuring tools 10A are left on the surface 33 of the ground 32 in the contaminated area for a predetermined time, so that each light stimulus connected to the long wire 11 via the connecting wire 15 is provided. The luminescence dosimeter 12 is widely dispersed (distributed) at a predetermined interval in the front and rear direction and the lateral direction on the ground 32, and the horizontal dose of the ground 32 is obtained by the photostimulated luminescence dosimeter 12 sealed in the packaging bag 14. Therefore, the dose of the earth 32 in the contaminated area can be measured over a wide range in a short time without any effort, and the horizontal radiation dose distribution of the earth 32 (contamination distribution situation) It can be measured efficiently.

  1 and 2 using the dosimeter 10A, the light-stimulated luminescence dosimeter 12 can simultaneously measure 32 broad and planar doses of the earth in the contaminated area. There is no deviation in the measurement time in the sense dosimeter 12, and an accurate radiation dose on the ground 32 can be measured.

  FIG. 8 is a top view showing another example of the radiation dose measuring method using the dose measuring tool 10A, and FIG. 9 is a side view of the dose measuring method shown in FIG. 8 and 9 show a case where the horizontal dose of the bottom 35 of the underwater 34 (pond, lake, river, etc.) in the contaminated area is measured. 8 and 9, a ground weight 31 (grounding means) is connected to one end 29 and the other end 30 of the long wire 11, and the one end 29 and the other end 30 are connected to each other. A float 36 is connected. The ground weight 31 grounds the end portions 29 and 30 of the long wire 11 to the water bottom 35.

  The reel 16 around which the dose measuring tool 10A (long wire) is wound is carried to a pond, lake, river, etc. in the contaminated area (measurement area), and the dose measuring tool 10A (long wire 11) is fed out from the reel 16 to be long. The wire 11 is cut into a predetermined length and divided into a plurality of dose measuring tools 10A. Next, a grounding weight 31 is attached to one end portion 29 and the other end portion 30 of the long wire 11 of the dose measuring tool 10 </ b> A, and a float 36 is attached to the end portions 29 and 30. The dosimeter 10A is submerged in the water 34 in a state where the long wire 11 is extended in the front-rear direction (length direction) (extended state), and the dosimeter 10A is submerged in the water 34 as shown in FIG. Line up in the horizontal direction intersecting the front-rear direction. The float 36 floats on the water surface.

  When the dose measuring tool 10A is submerged in the water 34, the dose measuring tool 10A undulates along the unevenness of the water bottom 35, and a plurality of photo-stimulated luminescence dosimeters 12 are substantially equidistant in the water bottom 35 in the front-rear direction and the lateral direction. To distribute (distribute). Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19 and the measurement location (measurement location) on the water bottom 35 of the photostimulated luminescence dosimeter 12 is recorded together with the number. Is done. In these dosimeters 10A, the front surface 23 or the back surface 24 of the packaging bag 14 is grounded to the bottom 35 of the water 34, and the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12 is grounded to the bottom 35 via the packaging bag 14. To do. Radiation is irradiated from the water bottom 35 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12.

  In these dose measuring devices 10 </ b> A, the ground weight 31 can prevent the long wire 11 from inadvertently moving in the bottom 35, and the weight 13 housed in the second housing portion 26 of the packaging bag 14 is used for light-stimulated luminescence. The dosimeter 12 can be stopped at the bottom 35, and the horizontal dose at the bottom 35 can be reliably measured. In addition, the dose measuring tool 10 </ b> A has a position of the dose measuring tool 10 </ b> A in which the float 36 is submerged in the water 34 because the float 36 connected to the one end portion 29 and the other end portion 30 of the long wire 11 floats on the water surface. The dose measuring tool 10A that has been measured can be easily lifted from the water 34 using the float 36.

  After these dose measuring tools 10A are left on the bottom 35 of the water 34 for a predetermined time (after the measurement time has elapsed), the dose measuring tools 10A are pulled up from the water 34 and each dose measuring tool 10A is collected. The leaving time of the dose measuring instrument 10A varies depending on the dose of the bottom 35 of the contaminated area, the leaving time for the high dose area is short, about several hours, and the leaving time for the low dose area is long, about several days. . The collected dose measuring device 10A is sorted for each area (each place) of the water bottom 35, and the photostimulated luminescence dosimeter 12 is taken out from the packaging bag 14, and each photostimulated luminescence dosimeter 12 is It is installed in the aforementioned dose reading device (not shown) in the order of numbers, and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading device, a planar topographic map (bird's eye view) showing the topography of the bottom 35 of the contaminated area (measurement area) and a side view showing the side shape of the bottom 35 are displayed. In addition, each measurement location (the ground contact location of the light-stimulated luminescence dosimeter 12) is displayed on the planar topographic map and the side view, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. The measurement image is output by a printer. By viewing the measurement image, the horizontal planar dose of radiation at the bottom 35 of the underwater 34 in the contaminated area (measurement area) can be known over a wide range.

  The dose measurement method shown in FIGS. 8 and 9 using the dose measurement tool 10A includes a plurality of dose measurement tools 10A in a state in which the long wire 11 forming the dose measurement tool 10A is extended in the front-rear direction (length direction). Submerged in the water 34, the dose measuring tools 10 </ b> A are arranged at a predetermined interval on the water bottom 35, and the dose measuring tools 10 </ b> A are left on the water bottom 35 of the water 34 in the contaminated area for a predetermined time, so Each of the photostimulated luminescence dosimeters 12 connected to the wire rod 11 is dispersed (distributed) over a wide range at a predetermined interval in the front and rear direction and the lateral direction on the water bottom 35, and the photostimulated luminescence doses sealed in the packaging bag 14. Since the horizontal dose of the bottom 35 is measured by the meter 12, the dose of the bottom 35 in the contaminated area can be measured over a wide range in a short time without any effort. Radiological dose distribution of the (pollution distribution) can be efficiently measured.

  The dose measurement method shown in FIGS. 8 and 9 using the dosimeter 10A can simultaneously measure a wide and planar dose of the bottom 35 of the underwater 34 in the contaminated area by the photostimulated luminescence dosimeter 12, There is no deviation in the measurement time in the photostimulated luminescence dosimeter 12, and an accurate radiation dose in the horizontal direction of the bottom 35 can be measured.

  10 is a front view showing another example of a radiation dose measuring method using the dose measuring tool 10A, and FIG. 11 is a front view of the dose measuring method shown in FIG. 10 and 11 show the case where the dose in the vertical direction is measured on a building in a contaminated area, and an ups and downs (not shown) such as a forest or a mountain valley. Buildings include not only contaminated buildings, but also nuclear buildings before and after the accident. In the dose measurement method shown in FIGS. 10 and 11, a stable weight 37 that increases the weight of the long wire 11 and stabilizes the dose measuring tool 10 </ b> A in the air is connected to one end of the long wire 11. The dose measuring instrument 10 </ b> A is wound around a reel 16 and installed in a drone 38 (unmanned aerial vehicle) together with the reel 16.

  The reel 16 is mounted perpendicular to the drone 38, and is rotated clockwise and counterclockwise by a motor (rotating mechanism) (not shown). In the reel 16, one end portion of the long wire 11 to which the stable weight 37 is attached extends downward from the reel 16. When the reel 16 rotates in the clockwise direction, the long wire 11 (dose measuring tool 10A) is fed out from the reel 16, and when the reel 16 rotates in the counterclockwise direction, the long wire 11 (dose measuring tool 10A) is reeled. 16 is wound up.

  The drone 38 rises into the air by the rotation of the rotor 39 installed on the drone 38, and flies horizontally and vertically in the air and stops (hoveres) in the air. In addition to being controlled by a propo (proportional system) that controls the drone 38, the drone 38 can also fly by autopilot. Note that the reel 16 is rotated clockwise and counterclockwise by the prop.

  The drone 38 is transported to the contamination area (measurement area), the drone 38 is activated (rotor 39 is rotated), and the drone 38 is raised by the propo to fly the drone 38 to the measurement point in the sky. After the drone 38 is positioned at the measurement location in the sky, the drone 38 is hovered on the spot, and the reel 16 is rotated in the clockwise direction, and the long wire 11 (dose measuring tool 10A) is fed out from the reel 16. The long wire 11 (dose measuring tool 10A) is gradually fed out from the reel 16 toward the ground surface.

  After the long wire 11 (dose measuring tool 10A) is drawn from the reel 16 to the set length (set feed length), the drone 38 is hovered in the air for a predetermined time. The long wire 11 (dose measuring tool 10A) is suspended downward from the reel 16 with the stable weight 37 on the bottom. The photostimulated luminescence dosimeter 12 is dispersed (distributed) in the vertical direction at predetermined intervals (substantially equal intervals) in the air. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19 and the measurement location (measurement location) in the air of the photostimulated luminescence dosimeter 12 is recorded together with the number. The

  While the drone 38 is hovering, the dosimeter 10A is stationary at a predetermined position in the air, and the radiation is irradiated from the building exposed to the radiation toward the front surface 17 or the rear surface 18 of the photostimulated luminescence dosimeter 12. When the long wire 11 is suspended downward from the reel 16 with the stable weight 37 connected to one end of the long wire 11 being down, the stable weight 37 prevents the long wire 11 from floating in the air. Each photostimulated luminescence dosimeter 12 can reliably measure the dose in the vertical direction of undulations such as buildings, forests, and valleys.

  After the drone 38 is hovered in the air for a predetermined time (after the dose measuring instrument 10A is left in the air for a predetermined time (after the measurement time has elapsed), the reel 16 is rotated counterclockwise, and the long wire 11 ( The dose measuring device 10A) is wound around the reel 16. Next, the drone 38 is landed at a predetermined landing position, the reel 16 is removed from the drone 38, and the dose measuring tool 10A is recovered from the reel 16. Collected dosimeters 10A are sorted for each building in each contaminated area, and for each undulating area such as a forest or a mountain valley, and the photostimulated luminescence dosimeter 12 is taken out from the packaging bag 14, and each photostimulated luminescence is collected. The dosimeter 12 is installed in the above-described dose reading device (not shown) in the order of the numbers, and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  The measurement image displayed on the computer display attached to the dose reading device includes structures in the contaminated area (measurement area), side shapes and structures showing the shape of the undulations such as forests and valleys, forests and valleys A topographical map (bird's-eye view) showing the topography of the undulating land, etc. is displayed, and each measurement location (stationary location of the photo-stimulated luminescence dosimeter 12) is displayed on the side shape map and planar topographical map, and each measurement The radiation dose at the location is displayed as a numerical value or a bar graph. The measurement image is output by a printer. By looking at the measurement image, it is possible to know the radiation dose in the vertical direction in the buildings in the contaminated area (measurement area), and in the undulating areas such as forests and valleys.

  10 and 11 using the dose measuring tool 10A, the long wire 11 (dose measuring tool 10A) is suspended downward from the reel 16 by using the drone 38, and each photo-stimulated luminescence dosimeter is used. 12 are arranged in the vertical direction in the air, and these light-stimulated luminescence dosimeters 12 are left in the air in the contaminated area for a predetermined time, so that each light-stimulated luminescence dose connected to the long wire 11 via the connecting wire 15. The total 12 is dispersed (distributed) in the vertical direction at predetermined intervals in the air, and the dose in the vertical direction of undulations such as buildings, forests, and valleys is measured by these photostimulated luminescence dosimeters 12 sealed in the packaging bag 14 Therefore, it is possible to measure the dose in the vertical direction of buildings, forests, and valleys in contaminated areas in a short time without effort, and to make ups and downs in buildings, forests, valleys, etc. It can be measured dose distribution of the radiation in the vertical direction (pollution distribution) efficiently.

  The dose measurement method shown in FIGS. 10 and 11 using the dosimeter 10A is to simultaneously measure the vertical doses of the undulations such as buildings, forests, and valleys in the contaminated area with these photostimulated luminescence dosimeters 12. Therefore, the measurement time in the photo-stimulated luminescence dosimeter 12 is not shifted, and the accurate radiation dose in the vertical direction of the undulations such as buildings, forests, and valleys can be measured.

  FIG. 12 is a side view showing another example of a radiation dose measuring method using the dose measuring tool 10A. FIG. 12 shows a case where the dose in the vertical direction of the forest 40 (mountain area) in the contaminated area is measured. In the dose measuring method shown in FIG. 12, the long wire 11 (dose measuring tool 10A) is attached to a long support frame 41 made of wood, metal, or synthetic resin (plastic), and extends vertically on the support frame 41. Supported by the state. The support bases 41 are elongated support rods 42 (bars) extending in the vertical direction, a lower end support base 43 extending in the horizontal direction from the lower end of the support rod 42, and an upper end support base 44 extending in the horizontal direction from the upper end of the support rod. Formed from. In the dose measurement method, one end 29 of the long wire 11 is detachably connected to the lower end support 43 and the other end 30 of the long wire 11 is detachably connected to the upper support 44.

  The reel 16 and the support frame 41 around which the dose measuring tool 10A (long wire) is wound are carried to the forest 41 in the contaminated area (measurement area), and the dose measuring tool 10A (long wire 11) is fed out from the reel 16 to be long. The wire 11 is cut into a predetermined length and divided into a plurality of dose measuring tools 10A. Next, one end portion 29 of the long wire 11 is connected to the lower end support base 43, the other end 30 of the long wire 11 is connected to the upper end support base 44, and the dose measuring instrument 10A is supported to the lower end support base 43 and the upper end support. It is installed under extension between the table 44.

  The support rods 42 are erected so that the dose measuring tool 10A extends in the vertical direction, and the support bases 41 are arranged in the forest 40 at a substantially equal interval in the lateral direction. When these support frames 41 are arranged, the photostimulated luminescence dosimeter 12 is dispersed (distributed) in the vertical direction and the horizontal direction at predetermined intervals (substantially equal intervals) in the air. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19 and the measurement location (measurement place) in the air (forest 40) of the photostimulated luminescence dosimeter 12 is Recorded with a number.

  These dosimeters 10 </ b> A are stationary at a predetermined position in the air in the forest 40, and radiation is irradiated from the trees 40 of the forest 40 exposed to radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. Since one end 29 of the long wire 11 is supported by the lower end support base 43 and the other end 30 is supported by the upper end support base 44, the long wire 11 can be prevented from floating in the air, and each light stimulus The luminescence dosimeter 12 can reliably measure the vertical dose of the forest 40 in the contaminated area.

  After leaving these support stands 41 in the forest 40 for a predetermined time (after leaving the dose measuring device 10A in the forest 40 for a predetermined time (after the measurement time has passed)), the support stands 41 are collected and the support stand 41 10A of these dose measuring tools are removed from, and 10 A of dose measuring tools are collect | recovered. Collected dosimeter 10A is sorted for each forest 40 in each contaminated area, and the photostimulated luminescence dosimeter 12 is taken out from the packaging bag 14, and each photostimulated luminescence dosimeter 12 is described in numerical order. A dose reading device (not shown), and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  The measurement image displayed on the display of the computer attached to the dose reading apparatus includes a side view showing the vertical shape of the forest 40 in the contaminated area (measurement area) and a plan view (bird's eye view) showing the topography of the forest 40. ) Is displayed, and each measurement location in the forest 40 (location where the photo-stimulated luminescence dosimeter 12 is disposed) is displayed on the side shape map or the topographical map, and the radiation dose at each measurement location is a numerical value, a bar graph, etc. Is displayed. The measurement image is output by a printer. By looking at the measurement image, it is possible to know the radiation dose in the vertical direction in the forest 40 in the contaminated area (measurement area).

  In the dose measuring method shown in FIG. 12 using the dose measuring tool 10A, the long wire 11 is extended in the vertical direction by using the support frame 41 extending in the vertical direction, and each photo-stimulated luminescence dosimeter 12 is laterally moved in the air. By arranging the photostimulated luminescence dosimeters 12 in the direction and leaving them in the forest 40 in the contaminated area for a predetermined time, each photostimulated luminescence dosimeter 12 connected to the long wire 11 via the connecting wire 15 is in the air. The vertical dose of the forest 40 is measured by the photo-stimulated luminescence dosimeter 12 that is dispersed (distributed) in the vertical direction and the horizontal direction at predetermined intervals (approximately equal intervals) and sealed in the packaging bag 14. The dose of the forest 40 in the contaminated area can be measured over a wide range in a short time without labor, and the radiation dose distribution (contamination distribution status) in the vertical direction of the forest 40 can be measured efficiently. It can be.

  The dosimetry method shown in FIG. 12 using the dosimeter 10A can simultaneously measure the vertical dose of the forest 40 in the contaminated area by using these photostimulated luminescence dosimeters 12. There is no deviation in the measurement time in, and the exact radiation dose in the vertical direction of the forest 40 can be measured.

  FIG. 13 is a side view showing another example of a radiation dose measuring method using the dose measuring tool 10A. FIG. 13 shows a case where the vertical dose of the nuclear building 45 existing in the contaminated area or before the accident is measured, for example. In the dose measuring method shown in FIG. 13, the long wire 11 (dose measuring tool 10A) is attached to an elongated long support rod 46 (竿) extending in one direction made of wood, metal, or synthetic resin (plastic). The dose measuring tool 10 </ b> A is suspended downward from the support rod 46.

  In the dose measuring method shown in FIG. 13, a stable weight 37 for increasing the weight of the long wire 11 and stabilizing the dose measuring tool 10A in the air is connected to one end portion 29 of the long wire 11 and the other end 30 is supported. The rod 46 is detachably connected to the tip of the rod 46. The long wire 11 (dose measuring tool 10A) is wound around the reel 16, the reel 16 is attached to the base end portion of the support rod 46, and the long wire 11 is fed out from the reel 16 so that the long wire 11 (dose measuring tool 10 </ b> A) may be gradually extended from the tip of the support rod 46.

  The reel 16 and the support rod 46 around which the dose measuring tool 10A (long wire 11) is wound are transported to the nuclear building 45 existing in the contaminated area, and the dose measuring tool 10A (long wire 11) is unwound from the reel 16 to be long. The wire 11 is cut into a predetermined length and divided into a plurality of dose measuring tools 10A. Next, a stable weight 37 is attached to one end 29 of the long wire 11, and the other end 30 of the long wire 11 is connected to the tip of the support rod 46.

  The long wire 11 (dose measuring tool 10A) having a predetermined length suspended from the tip of the support rod 46 is suspended from the upper floor of the nuclear building 45 toward the lower floor. A support tool 47 is installed at the rear end of the support rod 46, and the support tool 47 is placed on the upper floor of the nuclear building 45, so that the dose measuring tool 10A moves from the upper floor to the lower floor of the nuclear building 45. Left in a suspended state. A plurality of support rods 46 may be used, the support rods 46 may be arranged in the horizontal direction on the upper floor of the nuclear building 45, and the long wire 11 (dose measuring tool 10A) may be suspended from each support rod 46. .

  The long wire 11 (dose measuring tool 10A) is suspended from the upper floor to the lower floor of the nuclear building 45 with the stable weight 37 on the lower side. The photostimulated luminescence dosimeter 12 is dispersed (distributed) in the vertical direction at a predetermined interval (substantially equidistant) in the nuclear power building 45. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19, and the measurement location (measurement location) in the nuclear building 45 of the photostimulated luminescence dosimeter 12 together with the number To be recorded.

  These dosimeters 10 </ b> A are stationary at a predetermined position in the air in the nuclear building 45, and the radiation is irradiated from the nuclear building 45 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. When the long wire 11 is suspended from the upper floor to the lower floor of the nuclear building 45 with the stable weight 37 connected to the one end 29 of the long wire 11 being down, the long wire 11 is moved by the stable weight 37. Can be prevented, and the dose in the vertical direction of the nuclear building 45 can be reliably measured by each photostimulated luminescence dosimeter 12.

  After the support rod 46 is left in the nuclear building 45 for a predetermined time (after the dose measuring tool 10A is left in the nuclear building 45 for a predetermined time (after the measurement time has elapsed), the support rod 46 is recovered from the nuclear building 45, The dose measuring tool 10A is removed from the support rod 46, and the dose measuring tool 10A is recovered. The collected dose measuring tool 10A is sorted for each location of the nuclear building 45, and the photostimulated luminescence dosimeter 12 is taken out from the packaging bag 14, and each photostimulated luminescence dosimeter 12 is already in the order of its number. It is installed in the aforementioned dose reading device (not shown), and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading device, there are a side view showing the vertical shape of the nuclear building 45 in the contaminated area and a plan topographical view (bird's eye view) showing the topography of the nuclear building 45. Each measurement location in the nuclear building 45 (location where the photostimulated luminescence dosimeter 12 is arranged) is displayed on the side shape diagram or planar topographic map, and the radiation dose at each measurement location is indicated by a numerical value or a bar graph. Is displayed. The measurement image is output by a printer. By viewing the measurement image, it is possible to know the vertical radiation dose in the vertical direction of the nuclear building 45 existing in the contaminated area.

  In the dose measurement method shown in FIG. 13 using the dose measuring tool 10A, the long wire 11 (dose measuring tool 10A) is moved from the upper floor to the lower floor of the nuclear building 45 by using the elongated support rod 46. Hanging, arranging the respective photostimulated luminescence dosimeters 12 in the vertical direction in the air of the nuclear building 45, and leaving these photostimulated luminescence dosimeters 12 from the upper floor to the lower floor of the nuclear building 45 for a predetermined time. The respective photostimulated luminescence dosimeters 12 connected to the long wire 11 via the wire 15 are dispersed (distributed) in the vertical direction at a predetermined interval (substantially equidistant) in the nuclear building 45 and sealed in the packaging bag 14. Since the dose in the vertical direction of the nuclear building 45 is measured by these photostimulated luminescence dosimeters 12, the dose of the nuclear building 45 can be measured over a wide range in a short time without labor. Can, the dose distribution in the vertical direction of the radiation of the nuclear building 45 (contamination distribution) can be efficiently measured.

  The dose measurement method shown in FIG. 13 using the dosimeter 10A can simultaneously measure the dose in the vertical direction of the nuclear building 45 by the photostimulated luminescence dosimeter 12, and the measurement in the photostimulated luminescence dosimeter 12 is possible. There is no time lag, and an accurate radiation dose in the vertical direction of the nuclear building 45 can be measured.

  14 is a front view of a dose measuring instrument 10B shown as another example, and FIG. 15 is a photostimulated luminescence dosimeter 12 and a weight 13 accommodated in the packaging bag 14 of the dose measuring instrument 10B of FIG. FIG. 2 is an enlarged view showing a connecting wire 15. FIG. 16 is an end view taken along line BB in FIG. Similar to that of FIG. 3, the dose measuring tool 10 </ b> B includes one flexible long wire 11 (long support member) that is long in one direction (length direction) and a plurality of photostimulated luminescence dosimeters 12. A plurality of weights 13, a plurality of packaging bags 14 (fixing means) for housing the photostimulated luminescence dosimeter 12 and the weight 13, and a plurality of connecting wires 15 for connecting the long wire 11 and the packaging bag 14. (Fixing means).

  The long wire 11 and the photostimulated luminescence dosimeter 12 are the same as those of the dose measuring tool 10A of FIG. The long wire 11 (the light-stimulated luminescence dosimeter 12, the weight 13, the packaging bag 14, and the connecting wire 15) is wound around the reel 16 so as to be able to be fed out (refer to FIG. 7). These weights 13 are made of lead and have a weight in the range of 10-100 g, increasing the weight of the packaging bag 14 and preventing inadvertent movement of the packaging bag 14. The weight 13 has a rectangular shape in plan view. The packaging bags 14 are made of thermoplastic synthetic resin sheets 22 (films) that overlap each other, and have front and back surfaces 23 and 24 of a predetermined area, the size of which is a photostimulated luminescence dosimeter. It is larger than that of 12 and weight 13.

  As shown in FIGS. 14 and 15, the packaging bag 14 is formed in a rectangular shape in plan view, and has a housing portion 48 that houses the light-stimulated luminescence dosimeter 12 and the weight 13. In the packaging bag 14, the thermoplastic synthetic resin sheet 22 (film) extending to both end edges 27 (periphery) and both side edges 28 (periphery) is sealed watertight by heat sealing, ultrasonic sealing, or laminating processing. Intrusion of moisture into the portion 48 is prevented.

  In one packaging bag 14, one light-stimulated luminescence dosimeter 12 and one weight 13 are sealed in a watertight manner in the accommodating portion 48. In the packaging bag 14, the weight 13 is fixed in a state of being sandwiched between thermoplastic synthetic resin sheets 22 that extend to the edge 27 of the packaging bag 14. On the surface 23 of the packaging bag 14, two thermoplastic synthetic resin sheets 22 overlap each other, and the surface 17 of the photostimulated luminescence dosimeter 12 faces the sheets 22. On the back surface 24 of the packaging bag 14, two thermoplastic synthetic resin sheets 22 overlap each other, and the back surface 18 of the photostimulated luminescence dosimeter 12 faces the sheets 22. Note that three or more thermoplastic synthetic resin sheets 22 may form the front and back surfaces 23 and 24 of the packaging bag 14.

  These connecting wires 15 are the same as those in FIG. 3, but are fixed in a state where the other end portions of the connecting wires 15 are sandwiched between thermoplastic synthetic resin sheets 22 extending to the side edges 28 of the packaging bag 14. In the dose measuring instrument 10B, the connecting wire 15 is attached to the long wire 11 in one direction with a predetermined spacing (equal spacing), and therefore the photostimulated luminescence dosimeter 12 sealed in the packaging bag 14 is attached. Are arranged at predetermined intervals (equal intervals) in the length direction of the long wire 11. In addition, there is no restriction | limiting in particular in the separation dimension L1 to the length direction of the photostimulation luminescence dosimeters 12 adjacent to the length direction.

  14 is a dosimetry method for measuring the horizontal dose of the ground surface 33 of the ground 32 (plain or ground) in the contaminated area shown in FIGS. 1 and 2, and the contaminated area shown in FIGS. Dose measurement method for measuring horizontal dose of bottom 35 of underwater 34 (pond, lake, river, etc.), drone 38 shown in FIGS. A measurement method for measuring the vertical dose of the sample, a measurement method for measuring the vertical dose of the forest 40 (mountain) in the contaminated area using the support frame 41 shown in FIG. 12, and a support rod 46 (竿) shown in FIG. ) Can be used in a measurement method for measuring the vertical dose of the nuclear building 45 before or after the accident. The dose measurement method using the dose measurement tool 10B has the same effect as the dose measurement method using the dose measurement tool 10A.

  FIG. 17 is a front view of a dose measuring tool 10C shown as another example. The long wire 11 of the dose measuring instrument 10C extends in the vertical direction (length direction) and is arranged in the horizontal direction with a plurality of first long wires 11a arranged in a horizontal direction intersecting the vertical direction with a predetermined distance. It is formed from a plurality of second long wires 11b that extend and are arranged at a predetermined distance in the vertical direction. The forms of the photostimulated luminescence dosimeter 12, the weight 13, and the packaging bag 14 connected to the first and second long wires 11a and 11b are the same as those of the dose measuring instrument 10A in FIG. The dose measuring tool 10B may be used. In the dose measuring tool 10C, a cross-section of the first long wire 11a and the second long wire 11b is connected and the first and second long nets 11a and 11b spread in two dimensions. Is forming.

  17 is a dose measuring method for measuring the horizontal dose of the ground surface 33 of the ground 32 (plain field, ground, etc.) in the contaminated area shown in FIGS. 1 and 2, and the contaminated area shown in FIGS. Dose measurement method for measuring horizontal dose of bottom 35 of underwater 34 (ponds, lakes, rivers, etc.), buildings in contaminated areas, forests, valleys, etc. using multiple drones 38 shown in FIGS. Measuring method for measuring the vertical dose of the undulating land, a measuring method for measuring the vertical dose of the forest 40 (mountain) in the contaminated area using the plurality of support frames 41 shown in FIG. 12, and shown in FIG. It can be used in a measuring method for measuring the vertical dose of the nuclear building 45 before or after the accident using a plurality of support rods 46 (竿).

  The dose measuring method using the dose measuring tool 10C is the same as the method for measuring the dose measuring tool 10C in a state in which the first and second long wires 11a and 11b are extended (a state in which the first net 49 is widened), By leaving them in the water 34 or the like for a predetermined time, the respective light-stimulated luminescence dosimeters 12 are dispersed (distributed) over a wide range at predetermined intervals on the ground 32 or the water 34 and the light-stimulated luminescence of one dose measuring instrument 10C. Since the dose in the horizontal direction of the ground 32 and the underwater 34 is measured over a wide range by the dosimeter 12, the horizontal dose of the ground 32 and the underwater 34 can be measured over a wide range in a short time without labor. The planar radiation dose distribution (contamination distribution status) of the earth 32, the water 34, etc. can be measured over a wide range with the single dose measuring tool 10C.

  Further, the second long wire 11b is extended in the horizontal direction or the front-rear direction and the first long wire 11a is suspended in the vertical direction (the first net 49 is spread), and the dose measuring tool 10C is placed in the contaminated area. Each of the photostimulated luminescence dosimeters 12 is dispersed (distributed) in a wide range, not only in the vertical direction but also in the horizontal or front-rear direction. The vertical doses of the undulations such as buildings, forests, and valleys are measured in a wide range by the light-stimulated luminescence dosimeter 12 of the measuring tool 10C. Dose can be measured in a wide range in a short time without labor, and the radiation dose distribution (contamination distribution status) in the vertical direction of undulations such as buildings, forests, and valleys can be measured with a single dosimeter 10C. To measure It is possible.

  FIG. 18 is a perspective view of a dose measuring tool 10D shown as another example. The long wire 11 of the dose measuring tool 10D extends in the vertical direction, and extends in the horizontal direction with a plurality of first long wires 11a arranged in the horizontal direction crossing the vertical direction and in the front-rear direction with a predetermined distance. And a plurality of second long wires 11b arranged at a predetermined distance in the front-rear direction and a plurality of third long wires 11c extending in the front-rear direction and arranged at a predetermined distance in the vertical direction and the horizontal direction. Is formed. In addition, although the form of the photostimulation luminescence dosimeter 12, the weight 13, and the packaging bag 14 connected with the 1st-3rd long wire 11a-11c is the same as that of 10 A of dose measuring tools of FIG. 3, FIG. The dose measuring tool 10B may be used. In the dose measuring tool 10D, the intersections of the first long wire 11a, the second long wire 11b, and the third long wire 11c are connected, and the first long wire to the third long wire 11a to 11c are tertiary. A three-dimensional second net 50 that spreads out is formed.

  18A and 18B is a measurement method for measuring a vertical dose of a structure in a contaminated area, and undulations such as forests and valleys using a plurality of drones 38 shown in FIGS. A measuring method for measuring the vertical dose of the forest 40 (mountain) in the contaminated area using a plurality of support frames 41 shown in FIG. 13, or before the accident using a plurality of support rods 46 (竿) shown in FIG. It can be used in a measurement method for measuring the dose in the vertical direction of the nuclear building 45 after the accident.

  In the dose measurement method using the dose measuring tool 10D, the second long wire 11b is extended in the lateral direction, the third long wire 11c is extended in the front-rear direction, and the first long wire 11a is suspended in the vertical direction. When the dosimeter 10D is left on the undulations such as buildings in the contaminated area, forests and mountains and valleys for a predetermined time in a state where the second net 50 is expanded, each light-stimulated luminescence dosimeter 12 is moved vertically. Not only in the lateral and longitudinal directions, but also in a wide range (distributed), the doses in the vertical direction of undulations such as buildings, forests, and valleys are widespread by those photostimulated luminescence dosimeters 12 of one dosimeter 10D. Therefore, it is possible to measure the vertical dose of undulations such as buildings, forests and mountains and valleys in a short time without any effort, and it is possible to measure solids of undulations such as buildings, forests and valleys. Radiation dose distribution Pollution distribution) can be extensively investigated in single dose measuring tool 10D.

  FIG. 19 is a front view of a dose measuring instrument 10E shown as another example, and FIG. 20 is an enlarged view showing the photostimulated luminescence dosimeter 12 accommodated in the sealed space 52. FIG. FIG. 21 is an end view taken along the line CC of FIG. The dose measuring tool 10E is a flexible long sheet material 51 (long supporting member) that extends straight in the length direction, a plurality of photo-stimulated luminescence dosimeters 12, and a predetermined distance apart in the length direction. And a plurality of sealed spaces 52 (fixing means) arranged side by side.

  The photostimulated luminescence dosimeter 12 is the same as that of the dose measuring tool 10A of FIG. The long sheet material 51 is made of transparent thermoplastic synthetic resin sheets 22 (thermoplastic synthetic resin films) that overlap each other. As the thermoplastic synthetic resin sheet 22, a sheet 22 (film) made of all existing thermoplastic synthetic resins can be used. A light-stimulated luminescence dosimeter 12 is interposed between the long sheet materials 51. The long sheet material 51 (photostimulated luminescence dosimeter 12) is wound around the reel 16 so as to be able to be fed out (refer to FIG. 7), similarly to the long wire 11 in FIG. The long sheet material 51 has front and back surfaces 23 and 24 having a predetermined area, and the size thereof is larger than that of the photostimulated luminescence dosimeter 12.

  In the dose measuring instrument 10E, the long sheet materials 51 (thermoplastic synthetic resin sheets 22) adjacent to the photostimulated luminescence dosimeter 12 are sealed in a water-tight manner by thermal welding, and are spaced apart at predetermined intervals (equally spaced apart). ) To form a sealed space 52. In these sealed spaces 52, the photostimulated luminescence dosimeters 12 are watertight and individually sealed (accommodated). In these sealed spaces 52, entry of moisture is prevented by a seal portion 53 having a predetermined width formed around the sealed space 52. The sealing portion 53 of the thermoplastic synthetic resin sheet 22 is made by heat sealing using a heat sealing machine or ultrasonic sealing using an ultrasonic sealing machine.

  On the surface 23 of the long sheet material 51, two thermoplastic synthetic resin sheets 22 overlap each other, and the surface 17 of the light-stimulated luminescence dosimeter 12 faces the sheets 22. On the back surface 24 of the long sheet material 51, the two thermoplastic synthetic resin sheets 22 overlap each other, and the back surface 18 of the light-stimulated luminescence dosimeter 12 faces the sheet 22. Note that three or more thermoplastic synthetic resin sheets 22 may form the front and back surfaces 23 and 24 of the long sheet material 51.

  In the dose measuring instrument 10E, these sealed spaces 52 are arranged at predetermined intervals (equally spaced apart) in the length direction of the long sheet material 51. Therefore, these photostimulated luminescence dosimeters sealed in the sealed spaces 52 are arranged. 12 are arranged at predetermined intervals (equal intervals) in the length direction of the long sheet material 51. In addition, there is no restriction | limiting in particular in the separation dimension L1 to the length direction of the photostimulation luminescence dosimeters 12 adjacent to the length direction.

  FIG. 22 is a top view showing an example of a radiation dose measuring method using the dose measuring tool 10E. FIG. 22 shows a case where the horizontal dose of the ground surface 33 of the ground 32 (plain field, ground, etc.) in the contaminated area is measured. In the dose measuring method shown in FIG. 22, a ground weight 31 (grounding means) is connected to one end portion 29 and the other end portion 30 of the long sheet material 51. The weight 31 causes the end portions 29 and 30 of the long sheet material 51 to contact the ground surface 33. In addition to the weight 31, the grounding means may be a pin that is attached to the end portions 29 and 30 of the long sheet material 51 and pierces the ground surface 33 or a screw rod that is screwed to the ground surface 33.

  The reel 16 around which the dose measuring tool 10E (long sheet material 51) is wound is carried to the ground 32 in the contaminated area (measurement area), and the dose measuring tool 10E is unwound from the reel 16 so that the long sheet material 51 has a predetermined length. And divided into a plurality of dose measuring tools 10E. Next, in the state which attached the grounding weight 31 to the one end part 29 and the other end part 30 of the elongate sheet material 51 of these dose measuring tools 10E, and extended the elongate sheet material 51 to the front-back direction (length direction). The dose measuring tools 10E are placed on the ground surface 33 of the ground 32, and the dose measuring tools 10E are arranged in the horizontal direction intersecting the length direction on the ground 32 as shown in FIG.

  When the dose measuring tool 10E is placed on the ground surface 33 of the ground 32, the dose measuring tool 10E undulates along the unevenness of the ground surface 33 (supporting FIG. 9), and a plurality of photostimulated luminescence dosimeters 12 are long on the ground surface 33. It is distributed (distributed) in substantially equal intervals in the horizontal direction and the horizontal direction. The front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12 is grounded to the ground surface 33 through the long sheet material 51. A sticker 19 with a number (serial number) is affixed to the surface 17 of each photostimulated luminescence dosimeter 12, and each photostimulated luminescence dosimeter 12 is specified by the number, and photostimulated luminescence is measured. The measurement location (measurement location) placed on the ground surface 33 of the sense dosimeter 12 is recorded together with its number.

  Radiation is irradiated from the surface 33 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. In these dosimeters 10E, the ground weight 31 can prevent inadvertent movement of the long sheet material 51 on the ground 32, and the light-stimulated luminescence dosimeter accommodated in the sealed space 52 of the long sheet material 51. 12 can be kept stationary on the ground surface 33, and the horizontal dose on the ground 32 can be reliably measured.

  After these dose measuring devices 10E are left on the surface 33 of the ground 32 for a predetermined time (after the measurement time has elapsed), each dose measuring device 10E is recovered from the surface 33 (contaminated area). The collected dose measuring device 10E is sorted for each area of the ground 32, and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52, and each photostimulated luminescence dosimeter 12 is a dose reading device in the order of the numbers. The dose of the radiation which is installed in (not shown) and applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading device, a planar topographic map (bird's eye view) showing the topography of the ground 32 in the contaminated area (measurement area) and a side view showing the side shape of the ground 32 are displayed. In addition, each measurement location (the ground contact location of the light-stimulated luminescence dosimeter 12) is displayed on the planar topographic map and the side view, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. The measurement image is output by a printer. By looking at the measurement image, the horizontal planar dose of radiation on the ground 32 in the contaminated area (measurement area) can be known in a wide range.

  In the dose measuring method shown in FIG. 22 using the dose measuring tool 10E, a plurality of dose measuring tools 10E in a state in which the long sheet material 51 is extended in the front-rear direction (length direction) are spaced apart by a predetermined distance in the lateral direction. By arranging these dose measuring devices 10E on the surface 33 of the ground 32 in the contaminated area for a predetermined time, the respective photostimulated luminescence dosimeters 12 sealed in the sealed space 52 of the long sheet material 51 are predetermined on the ground 32. Since the dose in the horizontal direction of the ground 32 is measured by the light-stimulated luminescence dosimeter 12 in a wide range at intervals, the horizontal dose of the ground 32 is spread over a wide range in a short time without labor. It is possible to measure the dose distribution (contamination distribution status) of the planar radiation in the horizontal direction of the ground 32 efficiently.

  The dose measurement method shown in FIG. 22 using the dosimetry tool 10E can simultaneously measure a wide and planar dose of the ground 32 by using the light-stimulated luminescence dosimeter 12. There is no deviation in measurement time, and an accurate radiation dose in the contaminated area of the ground 32 can be measured.

  FIG. 23 is a front view showing another example of a radiation dose measuring method using the dose measuring tool 10E. FIG. 23 shows a case in which the dose in the vertical direction is measured on a building in a contaminated area, or on an undulating area (not shown) such as a forest or a mountain valley. Buildings include not only contaminated buildings, but also nuclear buildings before and after the accident. In the dose measuring method shown in FIG. 23, a stable weight 37 that increases the weight of the long sheet material 51 and stabilizes the dose measuring tool 10 </ b> E in the air is connected to one end portion 29 of the long sheet material 51.

  The dose measuring tool 10E is wound around the reel 16 and installed on the drone 38 (unmanned aerial vehicle) together with the reel 16. The drone 38 is the same as that of FIGS. The reel 16 is mounted perpendicular to the drone 38, and is rotated clockwise and counterclockwise by a motor. One end portion 29 of the long sheet material 51 to which the stable weight 37 is attached extends downward from the reel 16.

  The drone 38 is transported to the contamination area (measurement area), the drone 38 is activated (rotor 39 is rotated), and the drone 38 is raised by the propo to fly the drone 38 to the measurement point in the sky. After the drone 38 is positioned at the measurement position in the sky, the drone 38 is hovered on the spot, and the reel 16 is rotated in the clockwise direction, and the long sheet material 51 (dose measuring tool 10E) is fed out from the reel 16.

  After the long sheet material 51 (dose measuring tool 10E) is drawn out from the reel 16 to the set length (set feed length), the drone 38 is hovered in the air for a predetermined time. The long sheet material 51 is suspended downward from the reel 16 in a state where the stable weight 37 is on the lower side. The surface of the light-stimulated luminescence dosimeter 12 from a building exposed to radiation while stationary at a predetermined position in the air while the light-stimulated luminescence dosimeter 12 is distributed in the vertical direction at predetermined intervals (substantially equal intervals) in the air Radiation is irradiated toward 17 or the back surface 18.

  The stable weight 37 can prevent the long sheet material 51 from floating in the air, and each light-stimulated luminescence dosimeter 12 can reliably measure the vertical dose of undulations such as buildings, forests, and valleys. it can. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19 and the measurement location (measurement location) in the air of the photostimulated luminescence dosimeter 12 is recorded together with the number. The

  After the drone 38 is hovered in the air for a predetermined time (after the dose measuring instrument 10E is left in the air for a predetermined time (after the measurement time has elapsed), the reel 16 is rotated counterclockwise, and the long sheet material 51 (Dose measuring tool 10E) is wound on reel 16. The drone 38 is landed at the landing position, the reel 16 is removed from the drone 38, and the dose measuring device 10E is recovered from the reel 16. The collected dosimetry tools 10E are sorted for each building in each contaminated area, and for each undulation such as a forest or a mountain valley, and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52, and each photostimulated luminescence is collected. The dosimeter 12 is installed in the above-described dose reading device (not shown) in the order of the numbers, and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  The measurement image displayed on the computer display attached to the dose reading device includes structures in the contaminated area (measurement area), side shapes and structures showing the shape of the undulations such as forests and valleys, forests and valleys A topographical map (bird's-eye view) showing the topography of the undulating land, etc. is displayed, and each measurement location (stationary location of the photo-stimulated luminescence dosimeter 12) is displayed on the side shape map and planar topographical map, and each measurement The radiation dose at the location is displayed as a numerical value or a bar graph. The measurement image is output by a printer. By looking at the measurement image, it is possible to know the radiation dose in the vertical direction in the buildings in the contaminated area (measurement area), and in the undulating areas such as forests and valleys.

  In the dose measurement method shown in FIG. 23 using the dose measuring tool 10E, the elongate sheet material 51 is suspended downward from the reel 16 by using the drone 38, and each photo-stimulated luminescence dosimeter 12 is vertically moved in the air. These photostimulated luminescence dosimeters 12 are left standing in the air of the contaminated area for a predetermined time, so that each photostimulated luminescence dosimeter 12 is dispersed (distributed) in the vertical direction at a predetermined interval in the air, and these photostimulated luminescence is measured. Sense dosimeter 12 measures the vertical dose of undulations such as buildings, forests, and valleys, so the vertical dose of undulations such as buildings, forests, and valleys can be measured in a short time without any effort. It can be measured over a wide range, and the radiation dose distribution (contamination distribution status) in the vertical direction of undulations such as buildings, forests, and valleys can be efficiently measured.

  The dose measurement method shown in FIG. 23 using the dose measuring instrument 10E can simultaneously measure the vertical dose of the undulations such as buildings, forests, and valleys by using the light-stimulated luminescence dosimeter 12. The measurement time in the luminescence dosimeter 12 is not shifted, and the accurate radiation dose in the vertical direction of the undulations such as buildings, forests, and valleys can be measured.

  FIG. 24 is a side view showing another example of a radiation dose measuring method using the dose measuring tool 10E. FIG. 24 shows a case where the dose in the vertical direction of the forest 40 (mountain area) in the contaminated area is measured. 24, the long sheet material 51 is attached to a long support frame 41, and is supported on the support frame 41 in a vertically extended state. The support frame 41 is the same as that of FIG.

  The reel 16 and the support frame 41 around which the dose measuring tool 10E (long sheet material 51) is wound are transported to the forest 40 in the contaminated area (measurement area), and the dose measuring tool 10E is fed out from the reel 16 so that the long sheet material 51 is removed. It is cut into a predetermined length and divided into a plurality of dose measuring tools 10E. Next, one end portion 29 of the long sheet material 51 is connected to the lower end support base 43, the other end portion 30 of the long sheet material 51 is connected to the upper end support base 44, and the dose measuring instrument 10E is connected to the lower end support base 43. It is installed under extension between the upper end support 44.

  The support rods 42 are erected so that the dose measuring tool 10E extends in the vertical direction, and the support bases 41 are arranged in the forest 40 at a substantially equal interval in the lateral direction. When these support frames 41 are arranged, the photostimulated luminescence dosimeter 12 is dispersed (distributed) in the vertical direction and the horizontal direction at predetermined intervals (substantially equal intervals) in the air. These dosimeters 10 </ b> A are stationary at a predetermined position in the air in the forest 40, and radiation is irradiated from the trees 40 of the forest 40 exposed to radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12.

  Since one end portion 29 of the long sheet material 51 is supported by the lower end support base 43 and the other end portion 30 is supported by the upper end support base 44, the long sheet material 51 can be prevented from floating in the air. The photostimulated luminescence dosimeter 12 can reliably measure the vertical dose of the forest 40 in the contaminated area. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19 and the measurement location (measurement location) in the air of the photostimulated luminescence dosimeter 12 is recorded together with the number. The

  After leaving these support stands 41 in the forest 40 for a predetermined time (after leaving the dose measuring device 10E in the forest 40 for a predetermined time (after the measurement time has passed)), the support stands 41 are collected and the support stand 41 The dose measuring device 10E is removed from the above, and the dose measuring device 10E is recovered. Collected dosimeters 10E are sorted for each forest 40 in each contaminated area, and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52. Each photostimulated luminescence dosimeter 12 is described in the order of its number. A dose reading device (not shown), and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  The measurement image displayed on the display of the computer attached to the dose reading apparatus includes a side view showing the vertical shape of the forest 40 in the contaminated area (measurement area) and a plan view (bird's eye view) showing the topography of the forest 40. ) Is displayed, and each measurement location in the forest (location where the photostimulated luminescence dosimeter 12 is placed) is displayed on the side surface shape map and the topographical map, and the radiation dose at each measurement location is indicated by a numerical value, a bar graph, etc. Is displayed. The measurement image is output by a printer. By looking at the measurement image, it is possible to know the radiation dose in the vertical direction in the forest 40 in the contaminated area (measurement area).

  In the dose measurement method shown in FIG. 24 using the dose measuring tool 10E, the long sheet material 51 is extended in the vertical direction by using the support frame 41 extending in the vertical direction, and each photo-stimulated luminescence dosimeter 12 is in the air. By arranging the photostimulated luminescence dosimeters 12 in the horizontal direction and leaving them in the forest 40 in the contaminated area for a predetermined time, the photostimulated luminescence dosimeters 12 are vertically and horizontally arranged at predetermined intervals (substantially equidistant) in the air. Since the dose in the vertical direction of the forest 40 is measured by the light-stimulated luminescence dosimeter 12, the dose in the vertical direction of the forest 40 is measured over a wide range in a short time without labor. Thus, the radiation dose distribution (contamination distribution status) in the vertical direction of the forest 40 can be efficiently measured.

  In the dose measurement method shown in FIG. 24 using the dose measuring instrument 10E, the vertical dose of the forest 40 can be measured simultaneously by the photostimulated luminescence dosimeter 12, and the measurement time in the photostimulated luminescence dosimeter 12 is measured. Therefore, an accurate radiation dose in the vertical direction of the forest 40 can be measured.

  FIG. 25 is a side view showing another example of a radiation dose measuring method using the dose measuring tool 10E. FIG. 25 shows a case where the vertical dose of the nuclear building 45 existing in the contaminated area or before the accident is measured, for example. In the dose measuring method shown in FIG. 25, the long sheet material 51 is attached to an elongated long support rod 46 (竿) extending in one direction and is suspended downward from the support rod 46. The support rod 46 is the same as that of FIG.

  In the dose measuring method shown in FIG. 25, a stable weight 37 that stabilizes the dose measuring tool 10E in the air by increasing the weight of the long sheet material 51 is connected to one end portion 29 of the long sheet material 51 and the other end portion 30. Is detachably connected to the tip of the support rod 46. The long sheet material 51 (dose measuring tool 10E) is wound around the reel 16, the reel 16 is attached to the base end portion of the support rod 46, and the long sheet material 51 is fed out of the reel 16 to be long. The length sheet material 51 (dose measuring tool 10E) may be gradually fed out from the tip of the support rod 46.

  The reel 16 and the support rod 46 around which the dose measuring tool 10E (long sheet material 51) is wound are transported to the nuclear building 45 where the contaminated area is present, and the dose measuring tool 10E is fed out from the reel 16 so that the long sheet material 51 is predetermined. And is divided into a plurality of dose measuring tools 10E. Next, the stable weight 37 is attached to one end portion 29 of the long sheet material 51, and the other end portion 30 is connected to the tip of the support rod 46.

  A long sheet material 51 (dose measuring tool 10E) having a predetermined length suspended from the tip of the support rod 46 is suspended from the upper floor of the nuclear building 45 toward the lower floor. The support tool 47 is connected to the rear end portion of the support rod 46, and the support tool 47 is placed on the upper floor of the nuclear building 45, so that the dose measuring tool 10E moves from the upper floor to the lower floor of the nuclear building 45. Left in a suspended state. Even if a plurality of support rods 46 are used, the support rods 46 are arranged in the horizontal direction on the upper floor of the nuclear building 45, and the long sheet material 51 (dose measuring tool 10E) is suspended from each support rod 46. Good.

  The photostimulated luminescence dosimeter 12 is dispersed (distributed) in the vertical direction at a predetermined interval (substantially equidistant) from the upper floor to the lower floor in the nuclear power building 45. These dosimeters 10E are stationary at a predetermined position in the air in the nuclear building 45, and the radiation is irradiated from the nuclear building 45 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12.

  When the long sheet material 51 is suspended from the upper floor to the lower floor of the nuclear building 45 with the stable weight 37 connected to the one end portion 29 of the long sheet material 51 facing down, the stable weight 37 The long sheet material 51 (dose measuring tool 10E) can be prevented from floating in the air, and the dose in the vertical direction of the nuclear building 45 can be reliably measured by each photo-stimulated luminescence dosimeter 12. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19, and the measurement location (measurement location) in the nuclear building 45 of the photostimulated luminescence dosimeter 12 together with the number To be recorded.

  After the support rod 46 is left in the nuclear building 45 for a predetermined time (after the dose measuring instrument 10E is left in the nuclear building 45 for a predetermined time (after the measurement time has elapsed), the support rod 46 is recovered from the nuclear building 45, The dose measuring tool 10E is removed from the support rod 46, and the dose measuring tool 10E is recovered. The collected dose measuring tool 10E is sorted for each location of the nuclear building 45, and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52, and the photostimulated luminescence dosimeters 12 are described in the order of their numbers. A dose reading device (not shown), and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading device, a side view showing the vertical shape of the nuclear building 45 and a plan view (bird's eye view) showing the topography of the nuclear building 45 are displayed. Each measurement location in the nuclear building 45 (location where the photo-stimulated luminescence dosimeter 12 is arranged) is displayed on the side surface shape map and the topographical map, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. . The measurement image is output by a printer. By looking at the measurement image, the radiation dose in the vertical direction of the nuclear building 45 (contaminated area) can be known.

  The dose measurement method shown in FIG. 25 using the dose measurement tool 10E is to move the long sheet material 51 (dose measurement tool 10E) from the upper floor to the lower floor of the nuclear building 45 using the elongated support rod 46. Each photo-stimulated luminescence dosimeter 12 is arranged in the vertical direction in the air of the nuclear building 45, and these photo-stimulated luminescence dosimeters 12 are allowed to stand on the upper floor of the nuclear building 45 for a predetermined time. Luminescence dosimeters 12 are distributed in the vertical direction at a predetermined interval (substantially equidistant) from the upper floor to the lower floor in the nuclear building 45, and the dose in the vertical direction of the nuclear building 45 by the photostimulated luminescence dosimeter 12. Therefore, the vertical dose of the nuclear building 45 can be measured over a wide range in a short time without labor, and the vertical dose distribution of the nuclear building 45 (contamination Cloth situation) can be efficiently measured.

  The dose measurement method shown in FIG. 25 using the dose measuring instrument 10E can simultaneously measure the dose in the vertical direction of the nuclear building 45 by using these photostimulated luminescence dosimeters 12, and the measurement in the photostimulated luminescence dosimeter 12 is possible. There is no time lag, and an accurate radiation dose in the vertical direction of the nuclear building 45 can be measured.

  FIG. 26 is a front view of a dose measuring instrument 10 </ b> F shown as another example, and FIG. 27 is an enlarged view showing the photostimulated luminescence dosimeter 12 and the weight 13 housed in the sealed space 52. FIG. 28 is an end view taken along the line DD in FIG. The dose measuring instrument 10F includes a flexible long sheet material 51 (long support member) that extends straight in the length direction, a plurality of photo-stimulated luminescence dosimeters 12, a plurality of weights 13, and a long length. It is formed from a plurality of sealed spaces 52 (fixing means) arranged at predetermined intervals in the vertical direction.

  The photostimulated luminescence dosimeter 12 is the same as that of the dose measuring tool 10A of FIG. The long sheet material 51 is the same as that of the dose measuring tool 10E of FIG. Between the long sheet materials 51, a light-stimulated luminescence dosimeter 12 is interposed, and a weight 13 is interposed adjacent to the dosimeter 12. The long sheet material 51 (photostimulated luminescence dosimeter 12, weight 13) is wound around the reel 16 so as to be able to be fed out as in the case of the long wire 11 in FIG. The weights 13 are made of lead and have a weight in the range of 10 to 100 g, increase the weight of the long sheet material 51 (each sealed space 52), and prevent the long sheet material 51 from being inadvertently moved. To do. The weight 13 has a rectangular shape in plan view.

  In the dosimeter 10F, the long sheet material 51 (thermoplastic synthetic resin sheet 22) adjacent to the light-stimulated luminescence dosimeter 12 and the weight 13 is sealed in a water-tight manner by thermal welding, and is separated at a predetermined interval in the length direction ( Sealed spaces 52 are formed that are spaced apart at equal intervals. In these sealed spaces 52, the light-stimulated luminescence dosimeter 12 and the weight 13 are watertight and individually sealed (accommodated). In these sealed spaces 52, entry of moisture is prevented by a seal portion 53 having a predetermined width formed around the sealed space 52.

  In the dose measuring instrument 10F, since the sealed spaces 52 are arranged at predetermined intervals (equal intervals) in the length direction of the long sheet material 51, the photostimulated luminescence dosimeters sealed in the sealed spaces 52 are arranged. 12 are arranged at predetermined intervals (equal intervals) in the length direction of the long sheet material 51. In addition, there is no restriction | limiting in particular in the separation dimension L1 to the one direction between the photostimulation luminescence dosimeters 12 adjacent to a length direction.

  FIG. 29 is a top view showing another example of a radiation dose measuring method using the dose measuring tool 10F. FIG. 29 shows a case where the horizontal dose of the bottom 35 of the underwater 34 (pond, lake, river, etc.) in the contaminated area is measured. In the dose measuring method shown in FIG. 29, a grounding weight 31 (grounding means) is connected to one end 29 and the other end 30 of the long sheet material 51, and a float is connected to the one end 29 and the other end 30. 36 are connected. The grounding weight 31 grounds the end portions 29 and 30 of the long sheet material 51 to the water bottom 35. In addition to the weight 31, the grounding means may be a pin that is attached to the end portions 29 and 30 of the long sheet material 51 and pierces the water bottom 35 or a screw rod that is screwed to the water bottom 35.

  The reel 16 around which the dose measuring tool 10F (long sheet material 51) is wound is transported to a pond, lake, river or the like in the contaminated area (measurement area), and the dose measuring tool 10E is fed out from the reel 16 to remove the long sheet material 51. It is cut into a predetermined length and divided into a plurality of dose measuring tools 10F. Next, the ground weight 31 and the float 36 are attached to one end 29 and the other end 30 of the long sheet material 51. In a state where the long sheet material 51 is extended in the front-rear direction (length direction), the dose measuring devices 10F are submerged in the water 34, and as shown in FIG. Line up in the crossing direction.

  When the dose measuring tool 10F is submerged in the water 34, the dose measuring tool 10F undulates along the unevenness of the bottom 35, and a plurality of photo-stimulated luminescence dosimeters 12 are approximately equidistant from the front and rear directions and the lateral direction on the bottom 35. Then, the float 36 floats on the water surface (with the aid of FIG. 9). The front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12 is grounded to the water bottom 35 via the long sheet material 51, and the water bottom 35 exposed to radiation is directed to the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. Radiation. Each photostimulated luminescence dosimeter 12 is specified by the number (serial number) described on the seal 19 and the measurement location (measurement location) on the water bottom 35 of the photostimulated luminescence dosimeter 12 is recorded together with the number. Is done.

  In these dose measuring tools 10 </ b> F, the ground weight 31 can prevent the long sheet material 51 from inadvertently moving in the bottom 35, and the weight 13 sealed in the sealed space 52 of the long sheet material 51 is used for the light-stimulated luminescence. The sense dosimeter 12 can be stopped at the bottom 35, and the horizontal dose at the bottom 35 can be reliably measured. In addition, the dose measuring tool 10F is a position of the dose measuring tool 10F in which the float 36 is submerged in the water because the float 36 connected to the one end portion 29 and the other end portion 30 of the long sheet material 51 floats on the water surface. The dose measuring instrument 10F for which measurement has been completed can be easily lifted from the water 34 using the float 36.

  After these dose measuring tools 10F are left on the bottom 35 of the water 34 for a predetermined time (after the measurement time has elapsed), the dose measuring tools 10F are pulled up from the water 34 and each dose measuring tool 10F is collected. Collected dosimeters 10F are sorted for each area of the bottom 35, and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52, and the photostimulated luminescence dosimeters 12 are described in the order of their numbers. A dose reading device (not shown) is installed, and the dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by the dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading device, a planar topographic map (bird's eye view) showing the topography of the bottom 35 of the contaminated area (measurement area) and a side view showing the side shape of the bottom 35 are displayed. In addition, each measurement location (the ground contact location of the light-stimulated luminescence dosimeter 12) is displayed on the planar topographic map and the side view, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. The measurement image is output by a printer. By looking at the measurement image, the horizontal planar dose of radiation at the bottom 34 in the water 34 in the contaminated area (measurement area) can be known in a wide range.

  In the dose measurement method shown in FIG. 29 using the dose measurement tool 10F, a plurality of dose measurement tools 10F in a state in which the long sheet material 51 is extended in the front-rear direction (length direction) are submerged in the water 35, and the dose measurement is performed. The tools 10F are arranged in the water bottom 35 at a predetermined distance in the lateral direction, and the dose measuring tools 10F are left on the water bottom 35 of the underwater 34 in the contaminated area for a predetermined time, so that each light-stimulated luminescence sealed in the sealed space 52 is provided. Since the dosimeter 12 is dispersed (distributed) in a wide range at predetermined intervals in the front and back directions and in the lateral direction at the bottom 35, the horizontal dose of the bottom 35 is measured by the photostimulated luminescence dosimeter 12. The dose can be measured over a wide range in a short time without labor, and the horizontal radiation dose distribution (contamination distribution status) in the horizontal direction of the bottom 35 can be measured efficiently. That.

  The dose measurement method shown in FIG. 29 using the dosimeter 10F can simultaneously measure a wide and planar dose of the bottom 35 of the water 34 with the photostimulated luminescence dosimeter 12, and the photostimulated luminescence dose. There is no deviation in the measurement time in the total 12, and an accurate radiation dose in the horizontal direction of the bottom 35 can be measured.

  The dose measuring tool 10E of FIG. 19 can also be used in the dose measuring method for measuring the horizontal dose of the bottom 35 of the water 34 (pond, lake, river, etc.) in the contaminated area shown in FIG. The effect of the dose measurement method shown in FIG. 29 using the dose measurement tool 10E of FIG. 19 is the same as that of the dose measurement method shown in FIG. 29 using the dose measurement tool 10F of FIG. The dose measuring tool 10F in FIG. 26 is a dose measuring method for measuring the horizontal dose of the ground 32 in the contaminated area shown in FIG. 22, and the vertical direction of the undulating land such as a building in the contaminated area, forest, or valley shown in FIG. 24, a dose measuring method for measuring the vertical dose of the forest 40 in the contaminated area shown in FIG. 24, and a vertical of the nuclear building 45 before or after the accident existing in the contaminated area shown in FIG. It can also be used in dosimetry methods that measure directional dose. The effect of the dose measurement method shown in FIGS. 22, 23, 24, and 25 using the dose measurement tool 10 </ b> F in FIG. 26 is the same as that shown in FIGS. 22, 23, 24, and 25 using the dose measurement tool 10 </ b> E in FIG. 19. This is the same as that of the dose measurement method shown in FIG.

  FIG. 30 is a front view of a dose measuring tool 10G shown as another example. The long sheet material 51 of the dose measuring instrument 10G extends in the vertical direction and extends in the horizontal direction with a plurality of first long sheet materials 51a arranged in the horizontal direction intersecting the vertical direction with a predetermined distance. It is formed of a plurality of second long sheet materials 51b arranged in the vertical direction with a predetermined distance. The form of the light stimulated luminescence dosimeter 12 sealed in the sealed space 52 and the sealed space 52 of the first and second long sheet materials 51a and 51b is the same as that of the dose measuring instrument 10E of FIG.

  In the dose measuring tool 10G, the intersection of the first long sheet material 51a and the second long sheet material 51b is connected, and the first and second long sheet materials 51a and 51b are two-dimensionally planar. One net 49 is formed. Although not shown, the long sheet material 51 of the dose measuring instrument 10F of FIG. 26 is formed of a plurality of first long sheet materials 51a and a plurality of second long sheet materials 51b, The intersections of the second long sheet materials 51a and 51b are connected to form a first flat net 49 in which the first and second long sheets 51a and 51b of the dose measuring instrument 10F spread two-dimensionally. Also good.

  The dose measuring instrument 10G in FIG. 30 is a dose measuring method for measuring the horizontal dose of the ground 32 in the contaminated area shown in FIG. 22 and the vertical direction of the undulating land such as a building in the contaminated area, forest, and valley shown in FIG. 24, a dose measuring method for measuring the vertical dose of the forest 40 in the contaminated area shown in FIG. 24, and a vertical of the nuclear building 45 before or after the accident existing in the contaminated area shown in FIG. The dose measurement method for measuring the dose in the direction, and the dose measurement method for measuring the dose in the horizontal direction of the bottom 35 of the water 34 (pond, lake, river, etc.) in the contaminated area shown in FIG.

  In the dose measuring method using the dose measuring tool 10G, the dose measuring tool 10G in a state where the first and second long sheet materials 51a and 51b are extended (a state where the first net 49 is expanded) is used as the ground 32 in the contaminated area. Or left underwater 34 or the like for a predetermined time, each photostimulated luminescence dosimeter 12 is dispersed (distributed) over a wide range at predetermined intervals on the ground 32 or underwater 34 and the like. Since the sense dosimeter 12 measures the horizontal dose of the ground 32 and the water 34 over a wide range, the horizontal dose of the ground 32 and the water 34 can be measured over a wide range in a short time without labor. It is possible to measure the dose distribution (contamination distribution status) of planar radiation such as the earth 32 and the underwater 34 in a wide range with one dosimeter 10G.

  Further, the second long sheet material 51b is extended in the lateral direction or the front-rear direction and the first long sheet material 51a is suspended in the vertical direction (the first net 49 is spread), and the dose measuring tool 10G is By leaving for a predetermined period of time in undulations such as buildings in the contaminated area, forests and mountain valleys, each light-stimulated luminescence dosimeter 12 is dispersed (distributed) in a wide range not only in the vertical direction but also in the horizontal or front-rear direction. The vertical doses of ups and downs such as buildings, forests, and valleys are measured in a wide range by the photostimulated luminescence dosimeters 12 of the two dosimeters 10G. The dose in the direction can be measured over a wide range in a short time without labor, and the dose distribution (contamination distribution status) of the radiation in the vertical direction on the undulations such as buildings, forests and mountains and valleys can be measured with one dosimeter 10G Wide range It can be measured.

  FIG. 31 is a perspective view of a dose measuring tool 10H shown as another example. The long sheet material 51 of the dose measuring instrument 10H includes a plurality of first long sheet materials 51a that extend in the vertical direction and are arranged at a predetermined distance from each other in the horizontal direction intersecting the vertical direction and in the front-rear direction. A plurality of second long sheet materials 51b that extend in the front-rear direction and are arranged with a predetermined distance apart, and a plurality of third long sheets that extend in the front-rear direction and are lined up with a predetermined dimension in the vertical and horizontal directions And material 51c. The forms of the sealed space 52 of the first to third long sheet materials 51a to 51c and the photostimulated luminescence dosimeter 12 sealed in the sealed space 52 are the same as those of the dose measuring instrument 10E of FIG.

  In the dose measuring tool 10H, the intersections of the first long sheet material 51a, the second long sheet material 51b, and the third long sheet material 51c are connected, and the first long sheet material to the third long sheet material. 51a-51c forms the three-dimensional 2nd net | network 50 which spreads in three dimensions. Although not shown, the long sheet material 51 of the dose measuring instrument 10F in FIG. 26 includes a plurality of first long sheet materials 51a, a plurality of second long sheet materials 51b, and a plurality of third long sheets. The first to third long sheet materials 51a to 51c are connected to each other, and the first to third long sheet materials 51a to 51c of the dose measuring instrument 10F are three-dimensionally spread. A second net 50 may be formed.

  The dose measuring tool 10H of FIG. 31 uses a plurality of drones 38 shown in FIG. 23 to measure the dose in the vertical direction of the structures in the contaminated area, the undulations such as forests and mountain valleys, and the like shown in FIG. A measuring method for measuring the vertical dose of the forest 40 (mountain) in the contaminated area using a plurality of support frames 41, before or after the accident using a plurality of support rods 46 (竿) shown in FIG. It can be used for a measuring method for measuring the dose in the vertical direction of the nuclear building 45.

  In the dose measurement method using the dose measuring tool 10G, the second long wire 51b is extended in the lateral direction, the third long wire 51c is extended in the front-rear direction, and the first long wire 51a is suspended in the vertical direction. When the dosimeter 10G is left for a predetermined period of time in a contaminated area of a building, forest, mountain valley, etc. in a state where the second net 50 is expanded, each light-stimulated luminescence dosimeter 12 is moved vertically. Not only in the lateral and longitudinal directions, but also in a wide range (distribution), the dose of vertical stimuli in undulations such as buildings, forests, and valleys is widened by those photostimulated luminescence dosimeters 12 of one dosimeter 10G. Therefore, it is possible to measure the vertical dose of undulations such as buildings, forests and mountains and valleys in a short time without any effort, and it is possible to measure solids of undulations such as buildings, forests and valleys. Radiation dose distribution Pollution distribution) can be measured over a wide range in a single dose measuring tool 10G.

  FIG. 32 is a perspective view of a dose measuring tool 10I shown as another example, and FIG. 33 is a perspective view showing another example of a radiation dose measuring method using the dose measuring tool 10I of FIG. FIG. 33 shows a case where the dose (dose distribution) of the underground 54 in the contaminated area exposed to radiation is measured. The underground 54 includes soil, mud, and sand. A dose measuring tool 10I used in the dose measuring method is formed of a dose measuring tool 10E shown in FIG. 19, a long piercing rod 55 that is long in the axial direction (length direction), a horizontal plate 56, and a handle portion 57. ing. In the dose measuring tool 10I, a dose measuring tool 10F shown in FIG. 26 can be used instead of the dose measuring tool 10E.

  The dose measuring tool 10E is a flexible long sheet material 51 (long supporting member) that extends straight in the length direction, a plurality of photo-stimulated luminescence dosimeters 12, and a predetermined distance apart in the length direction. And a plurality of sealed spaces 52 (fixing means) arranged side by side. The piercing rod 55 is made of a metal or a synthetic resin (plastic) and is formed into a flat plate shape that is long in the length direction, and its tip 58 is tapered. In addition, there is no restriction | limiting in particular in the shape of the piercing rod 55, The piercing rod 55 may be shape | molded by the rod shape long in the length direction. On one side of the piercing rod 55, a scale 59 arranged in the axial direction is displayed. The scale 59 indicates the piercing length (depth) of the piercing rod 55 into the ground 54 when the piercing rod 55 is pierced into the ground 54.

  In the dose measuring instrument 10 </ b> I, the long sheet material 51 is fixed to the piercing rod 55 in a state where the long sheet material 51 is pierced and extended in a straight line in the axial direction of the rod 55. The long sheet material 51 is fixed to a substantially central portion of one side surface of the piercing rod 55 by an adhesive or heat welding. In the dose measuring instrument 10 </ b> I, the photostimulated luminescence dosimeters 12 sealed in the sealed space 52 are arranged at predetermined intervals (equal intervals) in the axial direction of the piercing rod 55.

  The horizontal plate 56 is made of metal or synthetic resin (plastic) and is formed into a flat disk shape. The horizontal plate 56 is attached to the upper end portion 60 of the piercing rod 55. When the horizontal plate 56 contacts the ground surface 33, further piercing of the piercing rod 55 into the ground 54 is restricted. The handle 57 is made of metal or synthetic resin (plastic) and is shaped like a rod extending in the axial direction. The handle portion 57 is attached to the upper end portion 60 of the piercing rod 55.

  In the dose measurement method shown in FIG. 33, the dose measuring instrument 10I is carried to a contaminated area (measurement area), the handle 57 is grasped and the piercing rod 55 is pierced from the ground surface 33 of the contaminated area into the ground 54. When the piercing rod 55 is pierced, the rod 55 gradually enters the ground from the tip portion 58 toward the upper end portion 60. The dose measuring tool 10I adjusts the piercing length (depth) of the piercing rod 55 into the ground 54 while checking the scale 59 displayed on one side thereof. When the piercing rod 55 of the dose measuring instrument 10I is pierced into the underground 54, the plurality of photostimulated luminescence dosimeters 12 are dispersed (distributed) in the underground 54 at substantially equal intervals in the depth direction. A sticker 19 with a number (serial number) is affixed to the surface 17 of each photostimulated luminescence dosimeter 12, and each photostimulated luminescence dosimeter 12 is specified by the number, and photostimulated luminescence dose. A total of 12 measurement locations (measurement locations) in the ground 54 are recorded together with their numbers.

  With the piercing rod 55 pierced into the ground 54, the dose measuring device 10I is left for a predetermined time. Radiation is irradiated from the underground 54 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. After leaving the dose measurement tool 10I for a predetermined time (after the measurement time has elapsed), the handle 57 is grasped and the piercing rod 55 is extracted from the ground 54, and the dose measurement tool 10I is collected. The collected dose measuring device 10I is sorted for each area (each place), and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52, and each photostimulated luminescence dosimeter 12 is dosed in the order of its number. Installed in a reader (not shown). The dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by a dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading device, a side view showing the side shape in the depth direction of the underground 54 of the contaminated area (measurement area) is displayed. Each measurement location in the middle 54 (location where the light-stimulated luminescence dosimeter 12 is arranged) is displayed, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. The measurement image is output by a printer. By looking at the measurement image, it is possible to know the radiation dose in the depth direction in the underground 54 of the contaminated area (measurement area).

  The dose measuring method shown in FIG. 33 using the dosimetry tool 10I is the stimulation luminescence sealed in the sealing space 52 of the long sheet material 51 together with the long sheet material 51 by inserting the piercing rod 55 into the ground 54. The sense dosimeter 12 enters the underground 54, and the piercing rod 55 is left in the underground 54 of the contaminated area for a predetermined time, so that each stimulated luminescence dosimeter 12 in the underground 54 at a predetermined interval in the depth direction thereof. While being distributed (distributed), the radiation dose of the underground 54 is measured by the stimulated luminescence dosimeter 12, so the dose of the underground 54 in the contaminated area can be measured in a short time without any effort. The dose distribution of radiation in the depth direction of the underground 54 in the contaminated area can be efficiently measured.

  The dose measurement method shown in FIG. 33 using the dosimeter 10I can simultaneously measure the radiation dose in the ground 54 by using the photostimulated luminescence dosimeter 12 fixed to the piercing rod 55. There is no deviation in the measurement time in the luminescence dosimeter 12, and an accurate dose distribution in the ground 54 can be measured.

  In the dose measuring method shown in FIG. 33 using the dose measuring instrument 10I, a scale 59 indicating the piercing length (depth) into the underground 54 when the piercing rod 55 is inserted into the underground 54 is displayed on the piercing rod 55. Therefore, it is possible to know the piercing length to the underground 54 when the piercing rod 55 is pierced to the underground 54 by the scale 59, and to know the measurement depth to the underground 54. The depth of the underground 54 where the dosimeter 12 is located can be known.

  FIG. 34 is a perspective view of a dose measuring tool 10J shown as another example, and FIG. 35 is a perspective view showing another example of a radiation dose measuring method using the dose measuring tool 10J of FIG. FIG. 36 is a perspective view of the dose measuring method continued from FIG. FIGS. 35 and 36 show a case where the dose (dose distribution) of the underground 54 of the deep water bottom 35 where the depth of the water 34 in the contaminated area exposed to radiation is deep is measured.

  The dose measuring tool 10J used for the dose measuring method is extendable and retractable with the dose measuring tool 10E shown in FIG. 19, the long piercing rod 55 extending in the axial direction (length direction), the horizontal plate 56 and the handle portion 57. A long stretchable rod 61 (stretchable rod) and a long string 62 that are long in the axial direction (length direction), and a float 36 are formed. In the dose measuring tool 10J, a dose measuring tool 10F shown in FIG. 26 can be used instead of the dose measuring tool 10E. Since the dose measuring tool 10E, the piercing rod 55, the horizontal plate 56, and the handle 57 are the same as those of the dose measuring tool 10I in FIG. 32, the same reference numerals as those in FIG. 32 are given, and the dose measuring tool 10I in FIG. These descriptions are omitted by using the description.

  The telescopic rod 61 is made of metal or synthetic resin (plastic). The telescopic rod 61 is detachably attached to the handle portion 57 (the upper end portion 60 of the stab rod 55), and is telescopic in the axial direction. The telescopic rod 61 is attached to the handle 57 by, for example, forming a male screw at its lower end and screwing it onto a female screw made on the handle 57. By rotating the telescopic bar 61 in the clockwise direction, the lower end of the telescopic bar 61 is screwed to the handle 57, and the telescopic bar 61 can be attached to the handle 57, and the telescopic bar 61 is rotated counterclockwise. By rotating, the telescopic rod 61 can be removed from the handle 57.

  The string 62 is made of synthetic resin (plastic) or fabric. The string 62 is inserted through an insertion hole 63 whose lower end is perforated in the horizontal plate 56, and is inserted into an insertion fitting 64 attached to the upper end of the expansion / contraction bar 61. It extends to. The float 36 is connected to the upper end of the string 62. The float 36 floats on the water surface when the piercing rod 55 is pierced into the ground 54 of the water bottom 35.

  In the dose measurement method shown in FIGS. 35 and 36, the dose measuring instrument 10 </ b> J is carried to a contaminated area (measurement area), the extendable bar 61 is screwed to the handle 57, and the extendable bar 61 is attached to the handle 57. After adjusting the length of the telescopic rod 61 according to the water depth of the underwater 34, the upper end of the telescopic rod 61 is gripped and stabbed together with the telescopic rod 61 to put the rod 55 into the water 34 in the contaminated area. Then, the piercing rod 55 is pierced from the bottom 35 into the ground 54 (in the mud) (see FIG. 35). When the piercing rod 55 of the dose measuring instrument 10J is pierced into the ground 54 of the water bottom 35, the plurality of light-stimulated luminescence dosimeters 12 are dispersed (distributed) at substantially equal intervals in the depth direction in the ground 54.

  After the piercing rod 55 is pierced into the ground 54 of the bottom 35, the telescopic rod 61 is rotated counterclockwise to remove the telescopic rod 55 from the handle portion 57, and the insertion fitting 64 is removed from the upper end of the telescopic rod 61. Then, the telescopic rod 61 is removed from the water 34. When the telescopic rod 61 is extracted from the underwater 34, the float 36 connected to the string 62 floats on the water surface while maintaining the piercing of the piercing rod 55 into the ground 54 of the bottom 35 (see FIG. 36). A sticker 19 with a number (serial number) is affixed to the surface 17 of each photostimulated luminescence dosimeter 12, and each photostimulated luminescence dosimeter 12 is specified by the number, and photostimulated luminescence is measured. The measurement location (measurement location) in the underground 54 of the bottom 35 of the sense dosimeter 12 is recorded together with its number.

  With the piercing rod 55 pierced into the ground 54 of the water bottom 35, the dose measuring instrument 10J is left for a predetermined time. Radiation is irradiated from the underground 54 exposed to the radiation toward the front surface 17 or the back surface 18 of the photostimulated luminescence dosimeter 12. After the dose measuring instrument 10J is left for a predetermined time (after the measurement time has elapsed), the string 62 is grasped to pull up the dose measuring instrument 10J, and the piercing rod 55 is pulled out from the ground 54 of the water bottom 35. Recover. The collected dose measuring device 10J is sorted for each area (each place), and the photostimulated luminescence dosimeter 12 is taken out from the sealed space 52, and each photostimulated luminescence dosimeter 12 is dosed in the order of its number. Installed in a reader (not shown). The dose of radiation applied to the photostimulated luminescence dosimeter 12 is read by a dose reading device.

  In the measurement image displayed on the computer display attached to the dose reading apparatus, a side shape diagram showing the side shape in the depth direction of the underground 54 of the bottom 35 of the contaminated area (measurement area) is displayed. In the figure, each measurement location in the underground 54 (location where the photostimulated luminescence dosimeter 12 is arranged) is displayed, and the radiation dose at each measurement location is displayed as a numerical value, a bar graph, or the like. The measurement image is output by a printer. By looking at the measurement image, it is possible to know the radiation dose in the depth direction in the underground 54 of the bottom 35 of the contaminated area (measurement area).

  35 and 36 using the dose measuring instrument 10J, the piercing rod 55 is pierced into the ground 54 of the water bottom 35 so that the long sheet member 51 and the long sheet member 51 are sealed in the sealed space 52. Each stimulated luminescence dosimeter 12 enters the underground 54, and the piercing rod 55 is left in the underground 54 of the bottom 35 of the contaminated area for a predetermined time. The radiation dose of the underground 54 in the bottom 35 is measured by the stimulated luminescence dosimeter 12 while being dispersed (distributed) at predetermined intervals in the depth direction. The measurement can be performed in a short time without applying, and the radiation dose distribution in the depth direction of the underground 54 of the bottom 35 of the contaminated area can be efficiently measured.

  The dose measurement method shown in FIGS. 35 and 36 using the dosimeter 10J is capable of simultaneously measuring the radiation dose in the underground 54 of the water bottom 35 by using these photostimulated luminescence dosimeters 12 fixed to the piercing rod 55. The measurement time in the photostimulated luminescence dosimeters 12 is not shifted, and an accurate dose distribution in the ground 54 of the bottom 35 can be measured.

  The dose measuring method shown in FIGS. 35 and 36 using the dose measuring instrument 10J uses the telescopic rod 61 when the piercing rod 55 is pierced into the ground 54 (in the mud) of the bottom 35 of the deep underwater 34. Thus, the piercing rod 55 can be pierced from the water surface into the ground 54 of the bottom 35 without diving into the water 34, and the radiation dose distribution in the ground 54 of the water bottom 35 in the deep water 34 can be easily measured. . In the dose measurement method, after the rod 55 is pierced into the underground 54 (in the mud) of the deep water 34 having a deep water depth, the float 36 connected to the distal end portion of the string 62 floats on the water surface. Becomes a mark for knowing the position of the dose measuring tool 10J submerged in the water 34, and the position of the dose measuring tool 10J can be known by the float 34. 34 can be easily lifted.

10A dosimetry tool 10B dosimetry tool 10C dosimetry tool 10D dosimetry tool 10E dosimetry tool 10F dosimetry tool 10G dosimetry tool 10H dosimetry tool 10I dosimetry tool 10J dosimetry tool 11 long wire 12 photo-stimulated luminescence dose Total 13 Weight 14 Packaging bag 15 Connecting wire 16 Reel 17 Surface 18 Back surface 19 Seal 20 Hook 21 Sarkan 22 Thermoplastic synthetic resin film 23 Surface 24 Back surface 25 First housing portion 26 Second housing portion 27 Both-end edge portion 28 Both side edge portions 29 One end 30 Other end 31 Grounding weight (grounding means)
32 ground 33 ground surface 34 underwater 35 bottom 36 float 37 stable weight 38 drone 39 rotor 40 forest 41 support frame 42 support rod 43 lower end support 44 upper end support 45 nuclear building 46 support rod 47 support 48 accommodating part 49 first net 50 Second net 51 Long sheet material 52 Sealing space 53 Seal part 54 Underground 55 Puncture rod 56 Horizontal plate 57 Handle part 58 Tip part 59 Scale 60 Upper end part 61 Stretching rod 62 String 63 Insertion hole 64 Insertion fitting

Claims (28)

In a dosimetry method for measuring the dose of radiation in a contaminated area exposed to radiation,
The dose measuring method is formed from a long support member that is long in the length direction and a plurality of passive dosimeters that are attached to the support member at predetermined intervals in the length direction via predetermined fixing means. And measuring the radiation dose distribution in the contaminated area with these passive dosimeters, leaving the dose measuring instrument extended in the lengthwise direction for a predetermined time in the contaminated area. Characteristic dosimetry method.   In the dosimetry method, the dosimeter is extended in the front-rear direction in the contaminated area, and the dosimeter is left in the contaminated area for a predetermined time with the passive dosimeters dispersed in the front-rear direction. The dose measurement method according to claim 1, wherein a dose distribution of radiation in the horizontal direction of the contaminated area is measured by a passive dosimeter.   In the dosimetry method, a plurality of the dosimeters that are extended in the front-rear direction are arranged at predetermined intervals in the lateral direction in the contaminated area, and the passive dosimeters are dispersed in the front-rear direction and the lateral direction. The dosimetry method according to claim 2, wherein the dosimeter is left in the contaminated area for a predetermined time in a state where the dose is measured, and the radiation dose distribution in the horizontal direction of the contaminated area is measured by the passive dosimeter.   In the dose measuring device, the support member extends in the front-rear direction and extends in the lateral direction with a plurality of first support members arranged in the lateral direction and extends in the lateral direction, and the plurality of first support members arranged in the front-rear direction with a predetermined dimension apart. Two support members, the intersections of the first and second support members are connected to form a planar net in which the first and second support members spread in two dimensions, and in the dosimetry method, The first support member is extended in the front-rear direction, the second support member is extended in the lateral direction, and the passive dosimeter is dispersed in the front-rear direction and the lateral direction, and the net is set in the contaminated area. 2. The dose measuring method according to claim 1, wherein the dose distribution of the radiation in the horizontal direction in the contaminated area is measured with the passive dosimeter after being left for a time.   In the dosimetry method, the dosimeter is extended in the up and down direction in the contaminated area, and the dosimeter is left in the contaminated area for a predetermined time with the passive dosimeters distributed in the up and down direction. The dose measurement method according to claim 1, wherein the dose distribution of radiation in the vertical direction of the contaminated area is measured by a passive dosimeter.   In the dosimetry method, a plurality of the dosimeters extended in the vertical direction are arranged in the contaminated area so as to be separated from each other by a predetermined dimension in at least one of the lateral direction and the longitudinal direction, and the passive dosimeters are arranged in the vertical direction. 6. The radiation dose distribution of the radiation in the vertical direction of the contaminated area is measured by leaving the dosimeters in the contaminated area for a predetermined time while being distributed in the lateral direction and the front-rear direction, and by passive dosimeters. The dosimetry method described in 1.   The dose measurement method according to claim 5 or 6, wherein in the dose measurement method, the dose measurement tool is suspended downward from above in the contaminated area using a predetermined suspension means.   The dose measuring method according to claim 7, wherein the suspending means is a long support rod, and one end of the dose measuring tool is connected to a tip of the support rod.   The dose measuring method according to claim 7, wherein the hanging means is a drone that hovers over the contaminated area, and one end of the dose measuring tool is connected to the drone.   The dose measuring method according to claim 9, wherein the drone includes a reel around which the dose measuring tool is wound up so that the dose measuring tool can be drawn up and down, and a rotating mechanism that rotates the reel above the contaminated area.   In the dose measuring device, the support member extends in the up-down direction and extends in the lateral direction with a plurality of first support members arranged in the horizontal direction and spaced apart by a predetermined size in the vertical direction. The first and second support members are connected to form a first planar net that extends two-dimensionally, and the dosimetry method Then, the first support member is extended in the vertical direction, the second support member is extended in the horizontal direction, and the passive net dosimeter is dispersed in the vertical direction and the horizontal direction, and the first net is The dosimetry method according to claim 1, wherein the radiation dose distribution in the vertical direction of the contaminated area is measured with the passive dosimeter after being left in the contaminated area for a predetermined time.   In the dose measuring device, the support member extends in the vertical direction and extends in the lateral direction with a plurality of first support members arranged in the lateral direction and the front-rear direction, and is arranged in the front-rear direction at a predetermined distance. A plurality of second support members and a plurality of third support members that extend in the front-rear direction and are arranged at predetermined intervals in the up-down direction and the lateral direction are formed, and the intersections of the first to third support members are connected The first to third long wire rods form a three-dimensional second net that spreads in three dimensions. In the dose measurement method, the first support member is extended in the vertical direction, and the second support member is laterally moved. The second net is placed in the contaminated area for a predetermined time with the third support member extending in the front-rear direction and the passive dosimeters dispersed in the up-down direction, the front-rear direction, and the lateral direction. And leave them with these passive dosimeters Dosimetry method according to claim 1 for measuring the dose distribution in the vertical direction of the radiation of the dyed area.   The dose measurement method according to claim 11 or 12, wherein in the dose measurement method, the first net or the second net is hung from the upper side to the lower side in the contaminated area using a predetermined hanging means. .   The supporting member is a flexible long wire extending straight in the length direction, and the fixing means is formed by watertight sealing the thermoplastic synthetic resin sheets that overlap each other, and the passive dosimeter is watertight. The dose measuring method according to any one of claims 1 to 13, wherein the dose measuring method is formed from a packaging bag that seals a weight and accommodates a weight of a predetermined weight, and a connecting wire that connects the long wire and the packaging bag.   The packaging bag is made of a thermoplastic synthetic resin film that overlaps each other, and includes a first housing portion that seals the passive dosimeter, and a second housing portion that houses the weight, and the first and second The thermoplastic synthetic resin films extending around the periphery of the housing part are sealed in a watertight manner, and the connecting wire is connected to the weight housed in the second housing part of the packaging bag. Dosimetry method.   The long wire is attached to one end and the other end thereof, and a pair of grounds for grounding the ends of the long wire to the ground surface or grounding the ends of the long wire to the bottom of the water The dosimetry method according to claim 14 or 15, comprising means.   The dose measuring method according to any one of claims 14 to 16, wherein the long wire includes a float attached to one end and the other end of the elongated wire and floating on a water surface.   The dosimetry method according to claim 14 or 15, wherein the long wire includes a stable weight attached to one end thereof to increase the weight of the long wire.   The support member is a flexible long sheet material made of a thermoplastic synthetic resin extending straight in the length direction, and the fixing means seals the long sheet material adjacent to the passive dosimeter. A plurality of sealed spaces formed and arranged at predetermined intervals in the lengthwise direction, and the stimulated luminescence dosimeters are watertightly and individually sealed in the sealed spaces. The dosimetry method described.   The dose measuring method according to claim 19, wherein the long sheet material includes a weight of a predetermined weight individually sealed in the sealed space.   The long sheet material is attached to one end and the other end thereof, and the ends of the long sheet material are grounded to the ground surface, or the ends of the long sheet material are grounded to the water bottom. The dose measurement method according to claim 19 or 20, comprising a pair of grounding means.   The dosimetry method according to any one of claims 19 to 21, wherein the long sheet material includes a float attached to one end portion and the other end portion thereof and floating on the water surface.   The dose measuring method according to claim 19 or 20, wherein the long sheet material includes a stable weight attached to one end thereof to increase the weight of the long sheet material.   The dose measuring tool includes a long piercing rod that is long in the length direction to pierce into the ground, and the dose measuring tool has the long sheet material extended in a straight line in the axial direction of the piercing rod. The long sheet material is fixed to the piercing rod, and in the dose measuring method, the dosimeter is left in the ground for a predetermined time in a state where the piercing rod is pierced in the ground of the contaminated area, and the passive type A dosimetry method for measuring a dose distribution of radiation in the ground by a dosimeter.   On the piercing rod, a scale indicating the piercing length into the ground when the piercing rod is pierced into the ground is displayed. In the dose measuring method, the ground of the piercing rod is observed while visually checking the scale. The dosimetry method according to claim 24, wherein the puncture length is adjusted.   The piercing rod is detachably attached with an extendable telescopic rod extending in the axial direction from the upper end of the piercing rod. In the dose measurement method, the piercing rod is inserted into the ground existing deeply using the extensible rod. The dose measurement method according to claim 24 or 25, wherein the dose is pierced.   A long string extending in the axial direction from the upper end of the piercing rod is attached to the upper end of the string, and a float that floats on the water surface is connected to the upper end of the string. In the dose measurement method, the telescopic rod is used. Then, after the piercing rod is pierced into the ground of the bottom of the water, the dosimeter is left in the ground for a predetermined time with the float connected to the string floating on the surface of the water, and the passive dosimeter is used to The dose measurement method according to claim 26, wherein the dose distribution of radiation in the ground is measured. The dosimetry method according to any one of claims 1 to 27, wherein the passive dosimeter is any one of a photostimulated luminescence dosimeter, a thermoluminescence dosimeter, and a fluorescent glass dosimeter.