JP2015143683A - Radiation shield panel and fence using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation shield panel capable of easily adjusting the shield property of a radiation ray, and a fence using the same.SOLUTION: A panel 1 comprises: a shield plate 2 formed by overlapping a metal plate 21 on at least one of plate surfaces of a synthetic resin plate 22 including materials for shielding a radiation ray; and a frame body 3 attached to an edge part of the shield plate 2 and forming a side end. Thereby, according to the required shield property of the radiation ray, the proper shield plate 2 is formed and attached to the frame body 3 for being used as the panel 1, and the panel 1 is used as a fence.

Description

  In the present invention, when storing soil or the like containing a radioactive substance outdoors, the radiation shielding panel that surrounds it and shields the radiation emitted to the surroundings, for example, can be suitably used as a temporary enclosure, and the same are used. Concerning moths.

  Since radioactive materials released from nuclear facilities and the like soak into the soil due to rainfall, the soil containing the radioactive materials is collected and decontaminated. Prior to this decontamination work, the collected soil must be collected and temporarily stored, and radiation may be emitted from the storage location toward the surroundings.

  In order to suppress the emission of radiation, a mortar or a concrete block is generally used as a material that is inexpensive and has a high radiation shielding property when surrounding the storage area with a bag or the like. However, since curing is required at the time of construction, it takes time for construction, and after storage is completed, it must be demolished, which is not suitable for short-term storage or temporary storage.

  For example, Patent Document 1 discloses a radiation shielding member including a plate-shaped radiation shielding member including a radiation shielding material in a resin, and a plate-shaped mating member laminated and integrated on the main surface of the radiation shielding member. Panels have been proposed.

JP 3013-36871 A

  By the way, although the radiation shielding member of patent document 1 is suitable for making so that it may have predetermined radiation shielding performance, depending on the quantity of the soil containing the target radioactive substance, the kind of radioactive substance, and the content Since the required performance is different, a radiation shielding member is manufactured in accordance with the required performance.

  The present invention solves the problems as described above, and provides a radiation shielding panel in which the radiation shielding property can be easily adjusted, and a bag using the radiation shielding panel.

In order to achieve the above object, the present invention is configured as follows.
That is, a radiation shielding panel according to the present invention is attached to a shielding plate formed by overlapping a metal plate on at least one plate surface of a synthetic resin plate containing a radiation shielding substance, and attached to an edge of the shielding plate. And a frame body that constitutes a side end.

  The bag according to the present invention is characterized in that a plurality of the radiation shielding panels are arranged in a row.

  In the radiation shielding panel according to the present invention, the shielding plate is formed by overlaying a metal plate on one plate surface of a synthetic resin plate containing a substance that shields radiation, and overlaying a decorative plate on the other plate surface. It is preferable that

  In the radiation shielding panel according to the present invention, it is preferable that the decorative plate is a laminated plate in which a synthetic resin is used as a core and a metal such as an aluminum foil is laminated on both front and back surfaces or one surface.

  Further, in the radiation shielding panel according to the present invention, a protrusion protrudes outwardly from each of the frames constituting the two opposite side ends of the radiation shielding panel, and the protrusion has a plurality of bowl-shaped panels. When lined up, it is preferable that the protruding ridges of the adjacent panels overlap each other in the front-rear direction.

  Moreover, the radiation shielding panel which concerns on this invention WHEREIN: It is preferable that the said protrusion is a bar material attached so that sliding was possible along each longitudinal direction of the four sides which comprise the said rectangular frame.

  Moreover, the radiation shielding panel which concerns on this invention WHEREIN: It is preferable that the edge parts are engaged between the said bar materials attached to two sides which comprise the corner | angular part of the said frame.

  According to the present invention, the type of the metal plate constituting the shielding plate, the synthetic resin plate containing the radiation shielding substance and the number of sheets used are changed, and the shielding plate suitable for the required radiation shielding property Can be attached to a frame body and used as a panel, and the frame body can be supported by a support member such as a support column to easily form a collar such as a temporary enclosure.

  In the radiation shielding panel according to the present invention, when a plurality of panels are arranged in a bowl shape, it becomes possible to suppress the passage of radiation by the protrusions, and the radiation as a whole can be efficiently shielded.

  In the radiation shielding panel according to the present invention, the shielding plate has a metal plate superimposed on one plate surface of a synthetic resin plate containing a substance that shields radiation, and a decorative plate superimposed on the other plate surface. If it is formed, a resin plate that is more likely to be thermally expanded than the metal plate is likely to come off from the frame body along the opposite side of the metal plate. This is preferable because deformation can be suppressed by the decorative plate.

  Further, in the radiation shielding panel according to the present invention, if the decorative board is a laminated board in which a synthetic resin is used as a core and a metal such as aluminum foil is laminated on both front and back surfaces, or one surface, the decorative board is lightweight. Strength can be increased.

  Further, in the radiation shielding panel according to the present invention, if the protrusion is a bar attached so as to be slidable along the longitudinal directions of the four sides constituting the rectangular frame body, Installation is easy and workability is improved.

  Moreover, in the radiation shielding panel according to the present invention, the rods attached to the two sides constituting the corners of the frame body may be configured such that the ends of the rod members are engaged with each other. When fixing, it can be attached so that the bar does not move without using a fixture for fixing the bar and the frame.

It is explanatory drawing which shows one Embodiment of the bag which concerns on this invention. It is an expanded sectional view in the AA cross section of FIG. It is a side view of FIG. It is a cross-sectional view of the vicinity of the fixing member of FIG. It is a schematic explanatory drawing of the panel of FIG. It is an expanded sectional view in the BB section of Drawing 5. It is a schematic explanatory drawing which shows the state which arranged the panel of FIG. It is an expanded sectional view in the CC cross section of FIG. FIG. 2 is an exploded explanatory view near a corner of the panel of FIG. 1. It is explanatory drawing of the protrusion of FIG. It is a front view showing another embodiment of a bag according to the present invention. It is a front view which shows 2nd embodiment in the panel as a radiation shielding panel which concerns on this invention. It is DD expanded sectional drawing of FIG. It is EE expanded sectional drawing of FIG. It is explanatory drawing of the corner | angular part vicinity of the panel of FIG.

  Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.

  FIG. 1 is an explanatory view showing an embodiment of the bag P according to the present invention. When temporarily storing soil containing radioactive substances before decontamination processing, the trap P according to the present embodiment is arranged with the radiation shielding panels 1 according to the present invention in the vertical and horizontal directions, and temporarily surrounds the periphery of the soil. Is formed. The panel 1 shields radiation emitted from the soil, and the degree of shielding is appropriately determined depending on the amount of radiation emitted from the soil and the shielding amount to be shielded.

  In the present embodiment, the panel 1 is attached in two stages up and down, but the number of upper and lower stages of the panel 1 can be changed according to the required height.

  2 is an enlarged cross-sectional view taken along the line AA of FIG. In this embodiment, the panel 1 has a frame 3 attached along the peripheral edge of a rectangular shielding plate 2 having a predetermined radiation shielding property. The shielding plate 2 includes a metal plate 21 made of a steel plate arranged on the soil side, a synthetic resin plate 22 containing a substance that shields radiation, and a decorative plate 23. It arrange | positions so that it may have high shielding power, so that it is near, and these 3 sheets are piled up and attached to the frame 3.

  In this embodiment, barium sulfate is used as the substance that shields radiation in the synthetic resin plate 22, but is not particularly limited. For example, strontium, iron, zinc, tin, tungsten, zirconium, lead, or these Or compounds containing boron, boron carbide, carbon nanotubes, and the like. You may use combining these substances.

  The resin used for the synthetic resin plate 22 is generally a thermoplastic synthetic resin that is easy to mold. In this embodiment, polyethylene that is a thermoplastic synthetic resin is used, but is not particularly limited. Such as polyolefin, EVA resin, modified polyolefin such as EAA resin, thermoplastic synthetic resin such as polyester, polycarbonate, polyvinyl chloride, polystyrene, acrylic resin, ABS resin, AAS resin, urethane resin and thermosetting synthetic resin Can do.

  In the present embodiment, the manufacturing method of the synthetic resin plate 22 takes into consideration the cost and manufacturing efficiency, and puts a material that shields radiation and the synthetic resin into an extruder and continuously extrudes them from a mold to an appropriate length. Manufactured by cutting. The production method is not limited to this, and a kneaded material may be prepared by kneading with a radiation shielding material, a synthetic resin, and a mixer, and the kneaded material may be charged into the extruder. It may be formed into a plate shape by pressing. Further, as another manufacturing method, a fiber containing a material that shields radiation, or a fiber produced from the fiber may be sandwiched from above and below by calender extrusion to form a plate. It may be immersed in a resin solution and coated with a resin to form a plate.

  The decorative plate 23 is not particularly limited, such as a metal plate, a resin plate, or a combination of these, but the synthetic resin plate 22 having a larger coefficient of thermal expansion than the metal plate 21 is particularly suitable in summer. The decorative plate 23 can prevent the decorative plate 23 from coming off from the frame 3 because a warp projecting to the opposite side of the metal plate 21 may occur and may come off from the frame 3. Further, as in this embodiment, a laminated board in which a metal foil such as an aluminum foil is attached to both front and back surfaces of a core material made of a thermoplastic synthetic resin similar to the synthetic resin used in the synthetic resin board 22 or on one surface. By doing so, it is lighter than the metal plate of the same thickness but excellent in strength. Compared to the metal plate, it can easily follow the deformation of the synthetic resin plate 22, and the synthetic resin plate 22 is excessively expanded and deformed. It can suppress that it remove | deviates from the frame 3. FIG.

  In this embodiment, the shielding plate 2 is obtained by superimposing a metal plate 21 made of a steel plate, a synthetic resin plate 22 and a decorative plate 23 made of a laminated plate. You can combine the boards. For example, a configuration in which the metal plate 21 made of a steel plate is disposed between the metal plate 21 and the synthetic resin plate 22, a configuration in which the synthetic resin plate 22 is disposed between the synthetic resin plate 22 and the decorative plate 23, or a metal plate 21 and a synthetic resin plate 22 may be repeatedly stacked, and a decorative plate 23 may be disposed outside the metal plate 21.

  The frame 3 is provided with a groove portion 32 having a substantially U-shaped cross section that opens inward from a base portion 31 formed along the side edge of the shielding plate 2, and an edge portion of the shielding plate 2 is inserted into the groove portion 32. Has been. In this embodiment, the screw B1 is screwed from the lower wall portion 33 of the groove portion 32 toward the shielding plate 2, and is further brought into close contact with the inner wall surface 34a of the upper wall portion 34 of the groove portion 32. It is fixed to the groove 32. As the frame 3, it is generally possible to use a material obtained by cutting a mold material formed of an aluminum alloy into an appropriate length. In this embodiment, the metal plate 21, the synthetic resin plate 22, and the decorative plate 23 that constitute the shielding plate 2 are simply overlapped, but the respective plates may be bonded to each other on the overlapped overlapping surface. .

  Next, the fixing structure of the panel 1 will be described with reference to FIGS. 3 is a side view of FIG. 1, and FIG. 4 is a cross-sectional view of the vicinity of the fixing member of FIG. In this embodiment, the panel 1 is fixed to the horizontal beam 5 via the fixing member 6 with the horizontal beam 5 attached between the columns 4 standing at a predetermined interval.

  As the support columns 4 and the cross rails 5, generally, steel pipes that are stable in strength and inexpensive are used, and in this embodiment, each has a round cross section. In addition to the steel pipe, a metal pipe made of another metal such as an aluminum alloy or a stainless alloy may be used. In this embodiment, the support column 4 is fixed to the base portion 41 provided on the installation surface using a steel pipe, and the support column 4 is supported by a steel pipe disposed obliquely from the rear side of the support column 4 toward the base portion 41. However, it may be constructed by burying the lower end portion of the column 4 on the installation surface.

  In this embodiment, the fixing member 6 is formed in a substantially C shape in a side view as shown in FIG. 3, and the horizontal rail 5 is disposed therebetween. At the tip end portion of the substantially C-shaped portion of the fixing member 6, a flange portion 61 bent in a substantially J shape is provided. When the frame 3 is fixed to the horizontal rail 5, the collar portion 61 is engaged with an engagement portion 35 having a substantially L-shaped cross section projecting inward from the base portion 31 of the frame body 3. The screwed bolt B2 is screwed into the horizontal beam 5 to draw the frame 3 to the horizontal beam 5, and the frame 3 is brought into close contact with the horizontal beam 5 to complete the fixing operation.

  This facilitates adjustment of the horizontal position of the panel 1 along the horizontal rail 5 and facilitates fixing and removing of the panel 1, but is not limited to this embodiment. What is necessary is just to determine a fixing method suitably according to an installation place or an installation place.

  Next, the panel 1 will be described in detail with reference to FIGS. That is, FIG. 5 is a schematic explanatory view of the panel 1 of FIG. 1, and FIG. 6 is an enlarged cross-sectional view of the BB cross section of FIG. On the side surface of the panel 1, the protrusion 7 protrudes outward from the base 31 of the frame 3. In the present embodiment, the ridge 7 protrudes outward from the upper portion of the base 31 of the frame 3 at the right end and upper end of the panel 1, and at the left end and lower end of the panel 1. The protrusion 7 protrudes outward at the lower part of the base 31 of the frame 3.

  FIG. 7 is a schematic explanatory view showing a state in which the panels 1 of FIG. 5 are arranged, and FIG. 8 is an enlarged cross-sectional view taken along the line CC of FIG. Due to the structure in which the ridges 7 project outward from the respective frame bodies 3 constituting the two opposite ends of the panel 1 described above, the ridges 7 of one panel 1 facing each other in the adjacent panels 1. And the ridge 7 of the other panel 1 overlap each other. Therefore, since the gap that can be generated between the panels 1 can be closed by the protruding ridges 7, the passage of radiation emitted from the soil inside the ridge P can be suppressed.

  The total thickness of the protrusions 7 in the front-rear direction may be set so that the shielding property of the panel 1 against radiation incident from the Y1 direction is equal to or greater than the shielding property of radiation incident from the Y2 direction. In this embodiment, a ridge 7 is attached to the frame 3 with a screw B3, and the ridge 7 is a square bar made of aluminum alloy. Thereby, since the suitable protrusion 7 can be selected and attached according to the shielding property of the required radiation, there are few members compared with the case where the frame 3 and the protrusion 7 are integrally formed. At the same time, adjustment of radiation shielding is relatively easy.

  The outer side of the base 31 of the frame 3 shown in FIG. 8 is provided with outwardly projecting portions 36 spaced apart from above, below, and below, between the upper projecting portion 36a and the middle projecting portion 36b. Or the protrusion 7 is arrange | positioned at either one between the middle protrusion part 36b and the lower protrusion part 36c. Accordingly, the upper, middle, and lower protrusions 36 can be used as guides when attaching the protrusions 7 to the outer wall portion of the frame 3.

  Furthermore, there may be a gap between the tip of the ridge 7 and the frame 3 of the panel 1 facing each other. For this reason, there is a possibility that the shielding property of radiation incident from the Y3 direction may be reduced. If the total thickness of each of the upper, middle, and lower protrusions 36 is thicker than the protrusion 7, it is possible to suppress a decrease in radiation shielding performance even if the gap is generated. In this embodiment, the frame 3 and the protrusion 7 are both made of an aluminum alloy. However, when different materials are used, the protrusions are adapted to the radiation shielding properties of the materials. What is necessary is just to adjust the thickness and number of 36.

  Further, the shielding plate 2 inserted into the groove 32 of the frame 3 may cause a gap between the bottom of the groove 32. In particular, as in this embodiment, when the screw B3 is screwed from the bottom of the groove portion 32 toward the protrusion 7, and the protrusion 7 is fixed, a step is generated at the bottom by the head of the screw B3. A gap is likely to occur. That is, there is a possibility that the shielding property of the radiation incident from the Y4 direction is lowered. In this case, a material that enhances the shielding property may be attached to the upper wall portion 34 or the lower wall portion 33 of the groove portion 32 in accordance with the width of the gap that may occur. As the material for enhancing the shielding property, for example, a metal material such as an aluminum alloy may be attached, or a tape for shielding radiation may be attached.

  As shown in FIG. 5, the ridges 7 are arranged in a substantially L shape so that the ridges 7 on the adjacent side surfaces of the panel 1 are continuous. That is, in the four base portions 31 of the frame 3, the protrusions 7 provided on the upper part are continuously arranged, and the protrusions 7 provided on the lower part are continuously arranged, whereby the panel 1. Two substantially L-shaped ridges 7 are arranged around.

  As a result, when the panels 1 are arranged, as shown in FIG. 9, at the place where the four corners of the panel 1 are gathered, the substantially L-shaped one panel 1a shown in FIG. The corner 71 of the ridge 7 and the corner 72 of the substantially L-shaped ridge 7 of the panel 1b disposed at a position diagonal to the panel 1a are as shown in FIG. By disposing the corner portion 72 on the front side and the corner portion 72 on the rear side, it is possible to suppress a decrease in radiation shielding property even at a location where the corner portions of the four panels 1 gather.

  The corner portions 71 and 72 of the substantially L-shaped ridge 7 may be obtained by attaching the other ridge 7 to the side surface of one ridge 7 as shown in FIG. In such a case, a slight gap may occur at the abutting location, and radiation may pass through the gap. Therefore, as shown in FIG. 10B, at the corner portions 71 and 72, the end of one protrusion 7 is notched to provide a notch 73, and the other protrusion 7 has the notch 73. If the fitting part 74 to be fitted is provided and the notch part 73 and the fitting part 74 are fitted, the gap generated in the fitting part does not communicate in the vertical direction in FIG. This is preferable because the passage of radiation can be suppressed even in the gap.

  At the lower end of the ridge P, there is only one ridge 7 thick in the front-rear direction when viewed from the front, and there is a risk of insufficient radiation shielding, so the ridge 7 is installed so as not to be exposed to the ground. It may be embedded in the surface, and the protrusions 7 may not be provided.

  The panel 1 shown in FIG. 1 is attached so that the longitudinal direction is up and down. However, as shown in FIG. 11, a part of the panels 1 are arranged and attached so that the longitudinal direction is left and right. Also good.

  12-15 is explanatory drawing which shows 2nd embodiment which concerns on this invention, Comprising: FIG. 12 is a top view of a panel, FIG. 13 is the elements on larger scale in the DD cross section of FIG. 12, FIG. It is the elements on larger scale in the EE cross section of FIG. 12, and explanatory drawing of the corner vicinity of the panel of FIG.

  The panel 1 according to this embodiment is mainly different from the panel 1 shown in FIGS. 5 to 10 in the form of the ridges 7, and the same components as those already described are denoted by the same reference numerals. The description is omitted.

  As shown in FIG. 12, the panel 1 according to this embodiment has the same configuration in which the ridges 7 protrude outward from the side surfaces thereof, but the ridges 7 constitute the frame body 3 arranged in a rectangular shape. The difference is that the bar 75 is slidably attached along each longitudinal direction of the four sides. Specifically, as shown in FIGS. 13 to 14, mounting grooves 37 that open to the side along the longitudinal direction of each side of the frame body 3 are formed, and the bar 75 as the protrusion 7 is An insertion portion 76 is slidably inserted along the longitudinal direction of the mounting groove 37. More specifically, the mounting groove 37 is formed in a dovetail shape whose opening width L1 is narrower than the inner width L2, and the insertion portion 76 opens the opening of the mounting groove 37 in a state of being positioned in the mounting groove 37. Protrusions 76a projecting toward both side wall surfaces of the mounting groove 37 are provided so that they cannot pass. As a result, the bar 75 can be moved only in the longitudinal direction of the mounting groove 37, and can be attached to the frame 3 with movement restricted in the opening direction of the mounting groove 37. Installation of 75 becomes easy and workability improves. As long as the rod 75 can be slidably attached to the frame 3, the panel 1 may have the insertion portion on the side surface, and the rod 75 may be formed with the attachment groove.

  The mounting groove 37 is formed as a mounting groove 37a in the upper part of the frame 3 as shown in FIGS. 13 to 14 at the left end and upper end of the panel 1 in FIG. 12, and the right end of the panel 1 in FIG. At the lower end, as shown in FIGS. 13 to 14, a mounting groove 37 b is formed in the lower part of the frame 3. A bar 75 is attached to each of the attachment grooves 37a and 37b. And in the two sides which comprise the corner | angular part of the frame 3, ie, the upper left corner | angular part 71 of the panel 1 of FIG. 12, the rod 75 attached to the attachment groove | channel 37a engages with each other in this form. Has been. Thus, each bar 75 can be extended in the longitudinal direction of each side, which is the longitudinal direction of the mounting groove 37, without using a fixture for the base 31 of the frame 3 such as the screw B3 shown in FIG. It can be attached to the frame 3 with its movement restricted.

  The method of engaging the end portions of the bar 75 is not particularly limited, but as shown in FIG. 14A, the end of one bar 75 is cut out to provide a cutout 77. The other bar 75 is provided with a fitting part 78 that fits into the notch 77, and the fitting part 78 is fitted into the notch 77, thereby engaging the ends of the bar 75 with each other. May be combined. Thereby, each bar 75 is restricted from moving in the direction passing through the engagement portion.

  Further, as shown in (b), the rods 75 are connected to each other by screwing screws B4 into the through holes 78a and 78a penetrating the fitting portion 78 shown in (a) in the vertical direction. Also good. Furthermore, as shown in (c), in the form in which the other rod member 75 is attached to the side surface of one rod member 75, the tip of the other rod member 75 abutted from the outer surface of the one rod member 75. A screw B4 may be screwed into the other bar 75 in a through hole 75a formed toward the part to connect the bars 75 to each other. Thereby, each rod 75 is restricted from moving in a direction passing through the engagement location and moving in a direction away from the engagement location.

  Examples of the method of engaging the end portions of the rod member 75 include a form in which one end of the rod member 75 is brought into contact with the other and the contact surfaces thereof are joined with an adhesive or the like.

  In addition, although the above demonstrated and demonstrated the embodiment of the scissors based on this invention, this invention is not limited to this embodiment, Various forms, construction methods, etc. in the range which does not deviate from the meaning of this invention. Can be changed.

  According to the radiation shielding panel of the present invention, the shielding plate can be configured in accordance with the required shielding property of the radiation, and a frame can be attached to the side end to form a panel. It can be suitably used as a fence surrounding a temporary storage site for soil containing radioactive substances. Moreover, it can also be suitably used for suppressing radiation emitted to the surroundings by surrounding a so-called hot spot where radioactive substances in the atmosphere are locally concentrated by rainfall.

1, 1a, 1b Panel 2 Shield plate 21 Metal plate 22 Synthetic resin plate 23 Decorative plate 3 Frame 31 Base portion 32 Groove portion 33 Lower wall portion 34 Upper wall portion 34a Inner wall surface 35 Engaging portion 36 Protruding portion 36a Upper protruding portion 36b Projection part 36c Lower projection part 37, 37a, 37b Mounting groove 4 Post 41 Base part 5 Horizontal rail 6 Fixing member 61 Ridge part 7 Projection 71, 72 Corner part 73 Notch part 74 Fitting part 75 Bar material 76 Insertion part 76a Projection Part 77 Notch part 78 Notch part 78a Through-hole B1 Screw B2 Bolt B3, B4 Screw P 塀 Y1, Y2, Y3, Y4 Direction in which radiation enters

Claims (7)

  A shielding plate formed by superimposing a metal plate on at least one plate surface of a synthetic resin plate containing a substance that shields radiation; and a frame that is attached to an edge of the shielding plate and forms a side end; A radiation shielding panel characterized by comprising: The shielding plate is formed by superimposing a metal plate on one plate surface of a synthetic resin plate containing a radiation shielding substance and overlaying a decorative plate on the other plate surface. The radiation shielding panel according to claim 1. 3. The radiation shielding panel according to claim 2, wherein the decorative board is a laminated board in which a synthetic resin is used as a core material and a metal such as an aluminum foil is laminated on both front and back surfaces or one surface.   A protrusion protrudes outwardly from each frame constituting the two opposite ends of the radiation shielding panel, and the protrusions are adjacent to each other when the panels are arranged in a plurality of bowls. The radiation shielding panel according to any one of claims 1 to 3, wherein the opposing protrusions are formed so as to overlap in the front-rear direction.   5. The radiation shielding panel according to claim 4, wherein the protrusion is a bar member slidably attached along each longitudinal direction of the four sides constituting the rectangular frame.   The radiation shielding panel according to claim 5, wherein ends of the bar attached to two sides constituting a corner of the frame are engaged with each other. A scissors characterized in that the radiation shielding panels according to any one of claims 1 to 6 are arranged in a plurality of scissors.

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