KR100916608B1 - Multi-calibrator of pocket dosimeter - Google Patents

Abstract

A pocket dosimeter multi straightener is provided to minimize the radiation exposure amount of an operator by controlling the location and angle of the ten pocket dosimeters. A pocket dosimeter multi straightener comprises a first and a second horizontal supporting stands(42,43), a guide rod(44), a tubular guide member and a fixing cone(48). Through holes are formed at the first and the second horizontal supporting stands at regular intervals. The diameter of the through hole of the second horizontal supporting stand is smaller than the through hole of the first horizontal supporting stand. The guide rod passes through the first through hole and the twelfth through hole of the first horizontal supporting stand. The guide rod is inserted in the first through hole and the twelfth through hole of the second horizontal supporting stand. The guide rod is accepted inside the tubular guide member. The tubular guide member is fixed at the guide rod with a height adjusting thread(45).

Description

Pocket Dosimeter Multi-Calibrator {MULTI-CALIBRATOR OF POCKET DOSIMETER}

The present invention relates to a pocket dosimeter multi-calibrator. More particularly, the present invention relates to a pocket dosimeter multi-calibrator capable of performing a very quick calibration of each pocket dosimeter by irradiating a plurality of pocket dosimeters at once.

In general, radiation measuring instruments that measure radiation are divided into two types, one of which is an area monitor type, which specifies the radiation dose in a certain area, and the other measures the radiation dose to a human body. It is a personal dose dosimeter.

In particular, the calibration of the so-called Pocket Doismeter, which is classified as a direct exposure dosimeter, is performed manually, and there are many problems such as weakness in the radiation defense of the calibrator and prolongation of the calibration time.

Such a pocket dosimeter is the most common and widely used equipment because it is inexpensive, simple, light, and can immediately read the exposure dose in the field as a radiation defense instrument for the human body.

The calibration procedure of a conventional pocket dosimeter first reads the pocket dosimeter, which has been requested for calibration, visually in a dosimeter recharger and makes a zero adjustment. Then, the pocket dosimeter was irradiated for a predetermined time in such a way that the radiation source stored in the radiation source storage tank located in the irradiation chamber was exposed one by one using a jig.

1 is a view for explaining a use example for calibrating a conventional pocket dosimeter, Figure 2 is a cross-sectional view of the configuration of a conventional pocket dosimeter, Figure 3 is an enlarged view of the portion A of FIG.

1 to 3, a use example for calibrating a conventional pocket dosimeter is provided with a hydraulic cylinder (not shown) and a radiation source (not shown) inside the shielded with lead, the irradiation area control device ( A radiation irradiator 1 equipped with 2); A transfer guide rail 4 provided with a motor 3 and a transfer guide member 5; A horizontal moving member (12) positioned on the conveying guide rail (4) and horizontally moved by the motor (4), the conveying guide member (5) and the conveying guide rail (4); A vertical movable member 13 mounted on the horizontal movable member 12 and equipped with a height adjusting handle 6; A rectangular horizontal plate (8) mounted on the vertical movable member (13) and formed of a predetermined thickness of aluminum material having a plurality of support holes (7); Jig (9) raised on the horizontal plate (8); It can be seen that the pocket dosimeter 20 is fixed to the jig (9).

Thus, the radiation emitted through the irradiation area adjusting device 2 of the radiation irradiator 1 is irradiated to the pocket dosimeter 20 fixed to the jig 9, at this time, by the driving of the motor 3 The horizontal and vertical of the horizontal plate 8 is adjusted by the movement and control of the horizontal moving member 12 and the movement and control of the vertical moving member 13 by the driving of the height adjusting handle 6. In this way, the radiation emitted from the irradiation area adjusting device 2 of the radiation irradiator 1 is irradiated perpendicularly to the pocket dosimeter 20 bitten by the jig 9 raised on the horizontal plate 8.

Here, the pocket dosimeter 20 may be referred to as a direct reading dosimeter and is commercially available in various types according to the radiation type and the measurement energy range. As shown in FIG. 2, the structure of the pocket dosimeter 20 is largely divided into two parts. That is, it is divided into the microscope 22 of the upper portion and the ion ionizer 23 of the lower portion. In addition, there is a very thin quartz fiber electrometer at the center of the sensitive portion labeled with an ionization chamber, and when irradiated with radiation, ionizes the air in the sensitive portion, and the amount of charge at this time of the microscope 22 Read through the lens.

In addition, the electrometer is composed of two electrodes, one of which is quartz fiber which moves in response to charge and the other is fixed electrode. As a result, the two electrodes are in close contact with a current, and when irradiated with radiation, ionization occurs in the ion ionization chamber 23 and is opened.

Therefore, the measurement value of the radiation indicates the cumulative dose, and the original value is read and recorded at the time of wearing by the individual, and the amount of exposure to the radiation, which is worn in the radiation field, is read again after a certain time, and the difference between the two values is Personal exposure dose

However, using the jig 9 as shown in FIG. 3, this conventional calibration method of manually calibrating the pocket dosimeter, one by one, increases the radiation exposure of the calibration worker and decreases the efficiency of the calibration service work. And excessive calibration time is required.

At present, the calibration cycle of the direct exposure dosimeter (ie pocket dosimeter) required by the Korea Metrology Association is recommended as 6 months. There are many uses in the industry of radiation, and nuclear power plants are the most frequently used.

In addition, the status of the domestic nuclear industry shows that the use of radiation measurement is increasing in the process of covering 50% of domestic electricity production by nuclear power by national policy. In addition, the number of radiation users in the industry is increasing by 15% every year, and the demand for the use and calibration of the radiometer is increasing rapidly.

Therefore, a calibration automation development project is very necessary to meet these demands. In particular, the conventional method of manually calibrating a pocket dosimeter, one by one, has problems in radiation exposure, calibration service efficiency and calibration time of a calibration worker.

In addition, using a telescope, there is no reference line for accurately positioning the pocket dosimeter fixed to the jig on the horizontal plate, there was a problem that can not support the pocket dosimeter at the desired angle and position.

Accordingly, an object of the present invention is to provide a pocket dosimeter multi-calibrator that can perform the calibration of each pocket dosimeter very quickly by irradiating a plurality of pocket dosimeters at a time to the radiation to solve the above problems.

In order to achieve the above technical problem, the pocket dosimeter multi-calibrator according to the present invention is in a direction perpendicular to the effective beam of the radiation in the effective beam region of the radiation is irradiated through the irradiation area adjusting device. Positioning each pocket dosimeter to irradiate each pocket dosimeter; A first horizontal support formed of an acrylic material having a predetermined thickness and having 12 through holes of a predetermined diameter formed at a predetermined interval; A second horizontal support formed at a lower portion of the first horizontal support and formed of an acrylic material having a predetermined thickness and having twelve through holes having a predetermined diameter smaller than a diameter of the through hole formed in the first horizontal support; ; A first through hole and a twelfth through hole of the through holes of the first horizontal support, inserted into a first through hole and a twelfth through hole of the through holes of the second horizontal support, Two guide rods made of aluminum formed on a rectangular horizontal plate formed of a predetermined thickness of aluminum having a plurality of support holes formed therein; A hollow cylindrical guide member made of aluminum and inserted into a first through hole and a twelfth through hole among the through holes of the first horizontal support, the guide rod being accommodated and fixed to the guide rod by a height adjusting screw; 10 conical hollow fixing members made of PVC material which are inserted into ten through holes except the first through hole and the twelfth through hole of the through holes formed in the first horizontal support and are fixed by tabs to fix the pocket dose meter. It is characterized by including.

In addition, the first and second horizontal support is formed concave 10 ° toward the radiation irradiator, so that the pocket dosimeter accommodated in the first and second horizontal support is perpendicular to the radiation irradiated through the irradiation area control device. It features.

In addition, the fifth and sixth conical hollow fixing member of the conical hollow fixing member is characterized in that the reference line for positioning the pocket dosimeter multi-calibrator on the horizontal plate.

In addition, according to the present invention, the pocket dosimeter multi-calibrator according to the present invention positions each pocket dosimeter in an orientation perpendicular to the effective beam of the radiation in the effective beam region of the radiation to which the radiation is irradiated through the irradiation area adjusting device. Irradiating each pocket dosimeter with radiation; A first horizontal support formed of an acrylic material having a predetermined thickness and having 12 through holes of a predetermined diameter formed at a predetermined interval; A second horizontal support formed at a lower portion of the first horizontal support and formed of an acrylic material having a predetermined thickness and having twelve through holes having a predetermined diameter smaller than a diameter of the through hole formed in the first horizontal support; ; A first through hole and a twelfth through hole of the through holes of the first horizontal support, inserted into a first through hole and a twelfth through hole of the through holes of the second horizontal support, Two guide rods formed of a threaded aluminum material which are inserted into and fixed in the support holes of a horizontal horizontal plate formed of a predetermined thickness aluminum material having a plurality of support holes formed therein; A hollow cylindrical guide member made of aluminum and inserted into a first through hole and a twelfth through hole among the through holes of the first horizontal support, the guide rod being accommodated and fixed to the guide rod by a height adjusting screw; 10 conical hollow fixing members made of PVC material which are inserted into ten through holes except the first through hole and the twelfth through hole of the through holes formed in the first horizontal support and are fixed by tabs to fix the pocket dose meter. It is characterized by including.

In addition, the pocket dosimeter multi-calibrator is characterized in that fixed to the horizontal plate with a nut.

As described above, the pocket dosimeter multi-calibrator according to the present invention can support ten pocket dosimeters at a desired angle and position at a time, so that the calibration of each pocket dosimeter can be performed very quickly, thereby reducing the radiation exposure of the calibration worker. It can be minimized, and the efficiency and efficiency of calibration service work can be dramatically reduced.

Hereinafter, a pocket dosimeter multi-calibrator according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of related well-known technologies or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to a client's or operator's intention or custom. Therefore, the definition should be made based on the contents throughout the specification.

Like reference numerals refer to like elements throughout.

4 is a view illustrating a use example of a pocket dosimeter multi-calibrator according to the present invention.

4, a radiation irradiator 1 equipped with a hydraulic cylinder (not shown) and a radiation source (not shown) inside the shielded with lead, and equipped with an irradiation area adjusting device 2; A transfer guide rail 4 provided with a motor 3 and a transfer guide member 5; A horizontal moving member (12) positioned on the conveying guide rail (4) and horizontally moved by the motor (4), the conveying guide member (5) and the conveying guide rail (4); A vertical movable member 13 mounted on the horizontal movable member 12 and equipped with a height adjusting handle 6; A rectangular horizontal plate (8) mounted on the vertical movable member (13) and formed of a predetermined thickness of aluminum material having a plurality of support holes (7); A pocket dosimeter multi-calibrator 40 mounted on the horizontal plate 8; It can be seen that the pocket dosimeter is composed of a plurality of pocket dosimeter 41 accommodated in the multi-calibrator 40.

Thus, the radiation emitted through the irradiation area adjusting device 2 of the radiation irradiator 1 is irradiated to a plurality of pocket dosimeters 41 accommodated in the pocket dosimeter multi-calibrator 40, wherein the motor 3 Horizontal and vertical adjustment of the horizontal plate 8 is carried out by the movement and control of the horizontal member 12 by the driving of the vertical movement member 13 and the movement and the control of the vertical member 13 by the drive of the height adjustment handle 6. do. In this manner, the radiation emitted through the irradiation area adjusting device 2 of the radiation irradiator 1 is applied to a plurality of pocket dosimeters 41 accommodated in the pocket dosimeter multi-calibrator 40 raised on the horizontal plate 8. Irradiated vertically.

Now, the structure of the pocket dosimeter multicalibrator 40 as shown in FIG. 4 will be described in more detail.

5 is a perspective view of a pocket dosimeter multicalibrator according to an embodiment of the present invention.

Referring to FIG. 5, the pocket dosimeter multicalibrator 40 according to the present invention is formed of an acrylic material having a predetermined thickness, and includes 12 through holes 42-1, 42-2,,,, 42-11, A first horizontal support 42 formed with a predetermined interval of 42-12; The through-holes 42-1, 42-2, ..., 42- which are formed under the first horizontal support 42, are formed of acrylic material having a predetermined thickness, and are formed in the first horizontal support 42. 12 through holes 43-1, 43-2, ..., 43-11, 43-12 having a predetermined diameter smaller than the diameter of 11, 42-12, and the second horizontal support 43 formed at regular intervals; ; The first through hole 42-1 and the 12th through hole 42-12 of the through holes 42-1, 42-2,..., 42-11, 42-12 of the first horizontal support 42. ) Is inserted into the first through hole (43-1) and the twelfth through hole (43-12) of the through holes of the second horizontal support 43, the lower portion of the second horizontal support 43 Two guide rods 44 made of aluminum formed on a rectangular horizontal plate 8 formed of a predetermined thickness of aluminum having a plurality of support holes 7 formed therein; The first through hole 42-1 and the 12th through hole 42-12 of the through holes 42-1, 42-2,..., 42-11, 42-12 of the first horizontal support 42. A hollow cylindrical guide member 46 made of aluminum and fixed to the guide rod 44 by a height adjusting screw 45; The first through hole 42-1 and the 12th through hole 42-12 of the through holes 42-1, 42-2,..., 42-11, 42-12 of the first horizontal support 42. PVC material inserted into ten through holes 42-2, 42-2, ,, 42-10, and 42-11 except for) and fixed by tabs 47 to fix pocket dosimeter 41. It consists of ten conical hollow fixing members (48).

Here, the hollow cylindrical guide member 46 has a through hole formed therein, and the height adjusting screw 45 is coupled to the through hole, so that the hollow cylindrical guide member 46 is connected to the guide rod 44. It is fixed.

Pocket dosimeter multi-calibrator 40 according to an embodiment of the present invention is the first horizontal support 42 and the second horizontal support 43 is formed 10 ° concave toward the radiation irradiator 1, the first The pocket dosimeter 41 accommodated in the first horizontal support 42 and the second horizontal support 43 is positioned in a direction perpendicular to the radiation irradiated through the irradiation area adjusting device 2 so that each pocket dosimeter 41 Is irradiated with radiation.

In addition, the fifth conical hollow fixing member 48-5 and the sixth conical hollow fixing member 48-6 of the conical hollow fixing member 48 include the pocket dosimeter multi-calibrator 40 on the horizontal plate 8. A reference line 49 is formed on the horizontal line, and it is checked through the telescope (not shown) whether the reference line 49 is horizontal with the horizontal plate 8.

6 is a perspective view of a pocket dosimeter multi-calibrator according to another embodiment of the present invention.

6, a radiation irradiator 1 mounted with a hydraulic cylinder (not shown) and a radiation source (not shown) inside the shielded with lead, and equipped with an irradiation area adjusting device 2; A transfer guide rail 4 provided with a motor 3 and a transfer guide member 5; A horizontal moving member (12) positioned on the conveying guide rail (4) and horizontally moved by the motor (4), the conveying guide member (5) and the conveying guide rail (4); A vertical movable member 13 mounted on the horizontal movable member 12 and equipped with a height adjusting handle 6; A rectangular horizontal plate (8) mounted on the vertical movable member (13) and formed of a predetermined thickness of aluminum material having a plurality of support holes (7); A pocket dosimeter multi-calibrator 40 inserted into the support hole 7 of the horizontal plate 8 and fixed with a nut; It can be seen that the pocket dosimeter is composed of a pocket dosimeter 41 accommodated in the multi-calibrator 40.

Here, the hollow cylindrical guide member 46 has a through hole formed therein, and the height adjusting screw 45 is coupled to the through hole, so that the hollow cylindrical guide member 46 is connected to the guide rod 44. It is fixed.

Thus, a plurality of pocket dosimeters 41, in which the radiation emitted through the irradiation area adjusting device 2 of the radiation irradiator 1 is accommodated in the pocket dosimeter multi-calibrator 40 fixed to the horizontal plate 8 with a nut. In this case, the movement and control of the horizontal member 12 by the drive of the motor 3, and by the movement and control of the vertical member 13 by the drive of the height adjustment handle (6). The horizontal and vertical of the horizontal plate 8 is adjusted. In this manner, the radiation emitted through the irradiation area adjusting device 2 of the radiation irradiator 1 is applied to a plurality of pocket dosimeters 41 accommodated in the pocket dosimeter multi-calibrator 40 raised on the horizontal plate 8. Irradiated vertically.

In addition, the pocket dosimeter multi-calibrator according to another embodiment of the present invention, similar to the pocket dosimeter multi-calibrator according to an embodiment of the present invention as described above, the first horizontal support 42 and the second horizontal support 43 10 ° concave toward the radiation irradiator 1, so that the pocket dosimeter 41 accommodated in the first horizontal support 42 and the second horizontal support 43 passes through the irradiation area control device 2. The pocket dosimeter 41 is irradiated with the radiation at a position perpendicular to the irradiated radiation.

In addition, the pocket dosimeter multi by using a telescope (not shown) in the fifth conical hollow fixing member 48-5 and the sixth conical hollow fixing member 48-6 of the conical hollow fixing member 48. A reference line 49 is shown for positioning the calibrator 40 on the horizontal plate 8.

As described above, the present invention has been described based on the preferred embodiments, but these embodiments are intended to illustrate the present invention, not to limit the present invention, so that those skilled in the art to which the present invention pertains can perform the above without departing from the spirit of the present invention. Various changes, modifications or adjustments to the example will be possible. Therefore, the protection scope of the present invention should be construed as including all changes, modifications or adjustments belonging to the gist of the technical idea of the present invention.

1 shows an example of use for calibrating a conventional pocket dosimeter.

2 is a cross-sectional view of a conventional pocket dosimeter.

3 is an enlarged perspective view of portion A of FIG. 1;

Figure 4 is an illustration of the use of the pocket dosimeter multi-calibrator according to the present invention.

Figure 5 is a perspective view of the pocket dosimeter multi-calibrator according to an embodiment of the present invention enlarged portion B of FIG.

6 is a perspective view of a pocket dosimeter multi-calibrator according to another embodiment of the present invention.

Explanation of symbols on main parts of drawing

1: Irradiator 2: Irradiation area control device

3: motor 4: feed guide rail

5: transfer guide member 6: height adjustment handle

7: Support hole 8: Horizontal plate

9: jig 12: horizontal moving member

13: vertical moving member 20, 41: pocket dosimeter

40: pocket dosimeter multi-calibrator 42: first horizontal support

43: first horizontal support 44: guide rod

45: height adjustment screw 46: hollow cylindrical guide member

47: tab 48: conical hollow fixing member

Claims (5)

In the effective beam region of the radiation irradiated through the irradiation area adjusting device, each pocket dosimeter is positioned in an orientation perpendicular to the effective beam of the radiation to irradiate the respective pocket dosimeter with radiation; A first horizontal support formed of an acrylic material having a predetermined thickness and having 12 through holes of a predetermined diameter formed at a predetermined interval; A second horizontal support formed at a lower portion of the first horizontal support and formed of an acrylic material having a predetermined thickness and having twelve through holes having a predetermined diameter smaller than a diameter of the through hole formed in the first horizontal support; ; A first through hole and a twelfth through hole of the through holes of the first horizontal support, inserted into a first through hole and a twelfth through hole of the through holes of the second horizontal support, Two guide rods made of aluminum formed on a rectangular horizontal plate formed of a predetermined thickness of aluminum having a plurality of support holes formed therein; A hollow cylindrical guide member made of aluminum and inserted into a first through hole and a twelfth through hole among the through holes of the first horizontal support, the guide rod being accommodated and fixed to the guide rod by a height adjusting screw; 10 conical hollow fixing members made of PVC material which are inserted into ten through holes except the first through hole and the twelfth through hole of the through holes formed in the first horizontal support and are fixed by tabs to fix the pocket dose meter. Pocket dosimeter multi-calibrator, characterized in that it comprises. The radiation unit of claim 1, wherein the first and second horizontal supports are concave 10 ° toward the radiation irradiator so that the pocket dosimeters accommodated in the first and second horizontal supports are irradiated through the irradiation area adjusting device. Pocket dosimeter multi-calibrator, characterized in that it forms a right angle. The pocket dosimeter multi-calibrator according to claim 1, wherein the fifth and sixth conical hollow fixing members of the conical hollow fixing members are marked with reference lines for positioning the pocket dosimeter multi-calibrator on the horizontal plate. . In the effective beam region of the radiation irradiated through the irradiation area adjusting device, each pocket dosimeter is positioned in an orientation perpendicular to the effective beam of the radiation to irradiate the respective pocket dosimeter with radiation; A first horizontal support formed of an acrylic material having a predetermined thickness and having 12 through holes of a predetermined diameter formed at a predetermined interval; A second horizontal support formed at a lower portion of the first horizontal support and formed of an acrylic material having a predetermined thickness and having twelve through holes having a predetermined diameter smaller than a diameter of the through hole formed in the first horizontal support; ; A first through hole and a twelfth through hole of the through holes of the first horizontal support, inserted into a first through hole and a twelfth through hole of the through holes of the second horizontal support, Two guide rods formed of a threaded aluminum material which are inserted into and fixed in the support holes of a horizontal horizontal plate formed of a predetermined thickness aluminum material having a plurality of support holes formed therein; A hollow cylindrical guide member made of aluminum and inserted into a first through hole and a twelfth through hole among the through holes of the first horizontal support, the guide rod being accommodated and fixed to the guide rod by a height adjusting screw; 10 conical hollow fixing members made of PVC material which are inserted into ten through holes except the first through hole and the twelfth through hole of the through holes formed in the first horizontal support and are fixed by tabs to fix the pocket dose meter. Pocket dosimeter multi-calibrator, characterized in that it comprises. 5. The pocket dosimeter multi-calibrator of claim 4, wherein the pocket dosimeter multi-calibrator is fixed to the horizontal plate with a nut.

Images