Radiation shielding panel joint structure

Abstract

To prevent radiation leakage from a joint between a pair of adjacent radiation shielding panels.SOLUTION: A radiation shielding panel joint structure is provided, comprising: multiple radiation shielding panels, each being configured to be rectangular-shaped when viewed from a thickness direction, comprise a radiation shielding plate containing plaster, and have a groove extending in a longitudinal direction formed on a joint end face extending in the longitudinal direction, where the multiple radiation shielding panels are arranged such that the respective grooves face each other; and a radiation shielding material inserted between each pair of adjacent radiation shielding panels across the groove of one radiation shielding panel and the groove of the other radiation shielding panel.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a joint structure of radiation shielding panels.

Background Art

[0002] The radiation shielding joint member described in Patent Document 1 is a radiation shielding joint member installed at a joint formed between end faces of adjacent radiation shielding panels when radiation shielding panels are arranged to form a radiation use room. The radiation shielding joint member includes a case having a housing portion with a T-shaped cross section that extends in one direction and is orthogonal to the extension direction, and a radiation shielding joint body that extends in one direction and has a T-shaped cross section orthogonal to the extension direction and is housed in the housing portion of the case. The vertical portion of the T shape of the radiation shielding joint body is installed at the joint, and the horizontal portion of the T shape of the radiation shielding joint body is installed across the plate surfaces on the end face sides of one radiation shielding panel and the other radiation shielding panel adjacent to each other.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Rooms with radiation sources such as X-ray examinations and treatments using radioisotopes (radiation isotopes) in medical institutions such as hospitals are radiation management areas where leakage of radiation to the outside is prevented. In order to prevent leakage of radiation from such radiation management areas, the walls of the radiation management areas are configured using a plurality of radiation shielding panels.

[0005] An object of the present disclosure is to suppress leakage of radiation from the joint portion between a pair of adjacent radiation shielding panels.

Means for Solving the Problems

[0006] The joining structure of the radiation shielding panel according to the first aspect is rectangular when viewed in the plate thickness direction, includes a radiation shielding plate containing gypsum, and has a recess extending in the longitudinal direction formed in a joining end face extending in the longitudinal direction. A plurality of radiation shielding panels arranged such that the recesses face each other, and a radiation shielding material inserted so as to fit into the recess of one radiation shielding panel and the recess of the other radiation shielding panel in adjacent radiation shielding panels. It is characterized by comprising.

[0007] According to the above aspect, the radiation shielding material is inserted so as to fit into the recess of one radiation shielding panel and the recess of the other radiation shielding panel in adjacent radiation shielding panels. Therefore, it is possible to suppress radiation from leaking from the joint portion of a pair of adjacent radiation shielding panels.

[0008] The joining structure of the radiation shielding panel according to the second aspect is the joining structure of the radiation shielding panel described in the first aspect, wherein the radiation shielding panel includes the radiation shielding plate and a steel plate covering the radiation shielding plate. It is characterized by.

[0009] According to the above aspect, since the steel plate covers the radiation shielding plate, self - standing property is ensured, and walls and the like can be constructed with radiation shielding panels without using a base material.

[0010] The joining structure of the radiation shielding panel according to the third aspect is the joining structure of the radiation shielding panel described in the second aspect, wherein the radiation shielding panel has a urethane foam layer laminated on the radiation shielding plate, and the steel plate covers a laminate in which the urethane foam layer is laminated on the radiation shielding plate. It is characterized by.

[0011] According to the above aspect, since the steel plate covers the laminate in which the urethane foam layer is laminated on the radiation shielding plate, the heat insulation property of the radiation shielding panel can be ensured.

[0012] The joining structure of the radiation shielding panel according to the fourth aspect is characterized in that, in the joining structure of the radiation shielding panel described in the third aspect, the recess is formed by cutting out a part of the urethane foam layer.

[0013] According to the above aspect, the recess is formed by cutting out a part of the urethane foam layer. In other words, the recess is formed without cutting the radiation shielding plate. Therefore, it is possible to suppress the leakage of radiation from the joint portion of a pair of adjacent radiation shielding panels as compared with the case where the radiation shielding plate is cut out.

Effect of the Invention

[0014] According to the present disclosure, it is possible to suppress the leakage of radiation from the joint portion of a pair of adjacent radiation shielding panels.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

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Figure 5

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Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0016] <First Embodiment> An example of a joining structure of radiation shielding panels according to the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 9. The arrow H shown in each figure indicates the vertical direction, which is the up-down direction of the radiation shielding chamber formed by the radiation shielding panels joined using the joining structure of the radiation shielding panels. The arrow W shown in each figure indicates the horizontal direction, which is orthogonal to the arrow H and is the width direction of the radiation shielding chamber. The arrow D shown in each figure indicates the horizontal direction, which is orthogonal to the arrows H and W and is the depth direction of the radiation shielding chamber.

[0017] First, the radiation shielding chamber will be described, and then the radiation shielding panel used for the joining structure of the radiation shielding panels and the joining structure of the radiation shielding panels will be described. The radiation shielding chamber according to the present embodiment is a chamber having a radiation source inside, for example, an inspection chamber having a radiation source for X-ray inspection in a medical institution such as a hospital.

[0018] (Radiation Shielding Chamber 100) As shown in FIG. 1, the radiation shielding chamber 100 has a rectangular parallelepiped shape extending in the width direction and includes a plurality of radiation shielding panels 10, 30 and end joining members 120, 130, 140, 150 extending in the width direction or the depth direction.

[0019] Two end joining members 120 are provided and arranged so as to sandwich the ceiling of the radiation shielding chamber 100 in the width direction and extend in the depth direction. Further, two end joining members 130 are provided and arranged so as to sandwich the ceiling of the radiation shielding chamber 100 in the depth direction and extend in the width direction.

[0020] Also, two end joining members 140 are provided and arranged so as to sandwich the floor of the radiation shielding chamber 100 in the width direction and extend in the depth direction. Further, two end joining members 150 are provided and arranged so as to sandwich the floor of the radiation shielding chamber 100 in the depth direction and extend in the width direction.

[0021] And between a pair of end joining members 120 facing each other in the width direction and between a pair of end joining members 130 facing each other in the depth direction, three radiation shielding panels 10 are arranged side by side in the width direction to form the ceiling.

[0022] Also, between a pair of end joining members 140 facing each other in the width direction and between a pair of end joining members 130 facing each other in the depth direction, three radiation shielding panels 10 (not shown) are arranged side by side in the width direction in the same manner as the ceiling to form the floor.

[0023] Furthermore, between the end joining member 130 and the end joining member 150 facing each other in the vertical direction, radiation shielding panels 30, radiation shielding panels 10, radiation shielding panels 10, and radiation shielding panels 30 are arranged side by side in this order in the width direction to form the wall.

[0024] Also, between the end joining member 120 and the end joining member 140 facing each other in the vertical direction, two radiation shielding panels 10 are arranged side by side in the depth direction to form the wall. And a door 34 with ensured radiation shielding property is attached to the radiation shielding panel 10 facing the outer side (right side in the figure) in the width direction.

[0025] (Radiation shielding panels 10, 30) As shown in FIG. 1, the radiation shielding panels 10 and 30 are used for the walls, ceiling, and floor (not shown) of the radiation shielding chamber 100. That is, the radiation shielding panels 10 and 30 are used to cover the radiation shielding chamber 100 from six sides. In the following description, the radiation shielding panel 10 used for the wall with the plate surface facing the depth direction will be described.

[0026] -Radiation Shielding Panel 10- As shown in FIG. 2, the radiation shielding panel 10 is rectangular and extends in the vertical direction when viewed from the depth direction. The radiation shielding panel 10 is formed with a pair of joint end faces 10a facing the width direction and a pair of joint end faces 10b facing the vertical direction. Further, recesses 40 having a rectangular cross-section are formed to extend in the longitudinal direction on the joint end faces 10a and the joint end faces 10b. The joint end face 10a is an example of a joint end face extending in the longitudinal direction.

[0027] Also, as shown in FIGS. 3 and 4, the radiation shielding panel 10 includes a laminate 16 having a radiation shielding plate 12 and a urethane foam layer 14 laminated on the radiation shielding plate 12, and a steel plate 20 integrally covering the laminate 16. And the radiation shielding plate 12 is arranged on the indoor side compared with the urethane foam layer 14. Here, integrally covering means covering the laminate 16 along the outer shape of the laminate 16.

[0028] The radiation shielding plate 12 contains gypsum, and the plate thickness of the radiation shielding plate 12 is the same from one end to the other end. And the thickness of the radiation shielding plate 12 is, for example, 15 [mm]. Note that, for example, RadBoard (registered trademark)-X (Takenaka Corporation) can be used for the radiation shielding plate 12.

[0029] The urethane foam layer 14 is laminated on the radiation shielding plate 12, and the recess 40 is formed by cutting out a part of the urethane foam layer 14 in an L shape. In other words, the thickness of the end portion of the urethane foam layer 14 is thinner than the thickness of the portion other than the end portion. And the thickness of the portion other than the end portion in the urethane foam layer 14 is, for example, 35 [mm].

[0030] The steel plate 20 integrally covers the laminate 16 in which the radiation shielding plate 12 and the urethane foam layer 14 are laminated, and is bent along the outer surface of the laminate 16. And, as an example, the thickness of the steel plate 20 is 0.4 [mm].

[0031] Also, as an example, the depth of the recess 40 described above is 26 [mm], and the opening width of the recess 40 is 17 [mm] as an example. Note that the urethane foam layer 14 is formed, for example, by foaming and filling urethane inside the steel plate 20 where the radiation shielding plate 12 is disposed.

[0032] -Radiation shielding panel 30- Regarding the radiation shielding panel 30, the parts different from the radiation shielding panel 10 will be mainly described. As shown in FIG. 2, the radiation shielding panel 30 is in a rectangular shape extending in the vertical direction when viewed from the depth direction. In the radiation shielding panel 30, recesses 40 having a rectangular cross section are formed in a pair of joint end faces 30a facing the width direction and a pair of joint end faces 30b facing the vertical direction. And, as shown in FIG. 1, the length in the width direction of the radiation shielding panel 30 is shorter than the length in the width direction of the radiation shielding panel 10. The joint end face 30a is an example of a joint end face extending in the longitudinal direction.

[0033] (Joint structure of the radiation shielding panel 10) First, the joint structure 50 between the radiation shielding panel 10 and the radiation shielding panel 10 used for the wall whose plate surface faces the depth direction will be described. Note that the joint structure between the radiation shielding panel 10 and the radiation shielding panel 30 has the same structure.

[0034] For the joining of a pair of radiation shielding panels 10, as shown in FIGS. 5(A) and 5(B), a radiation shielding material 24 having a rectangular cross-section extending in the vertical direction is used. The radiation shielding material 24 is formed of a member having a rectangular cross-section and ensuring radiation shielding properties. For example, it contains gypsum. As an example, the cross-sectional dimensions of the radiation shielding material 24 are 50 [mm] in the width direction and 15 [mm] in the depth direction. Note that RadBoard (registered trademark)-X (Takenaka Corporation) can be used as the radiation shielding material 24.

[0035] And in the joining structure 50 of the radiation shielding panel 10, the joining end faces 10a of the radiation shielding panels 10 are butted against each other, and the radiation shielding material 24 is inserted into the respective recesses 40 so as to fit into the pair of recesses 40. In this way, the pair of radiation shielding panels 10 are joined.

[0036] Next, the joining of the radiation shielding panel 30 with the plate surface facing the depth direction and the radiation shielding panel 10 with the plate surface facing the width direction will be described. As shown in FIG. 6(A), the joining end face 30a of the radiation shielding panel 30 is abutted against the plate surface of the radiation shielding panel 10. And a channel member 102 having an L-shaped cross-section is attached using a fixing member (not shown) so as to cover the corner formed by the radiation shielding panel 30 and the radiation shielding panel 10 from the outside. Also, inside the corner formed by the radiation shielding panel 30 and the radiation shielding panel 10, a channel member 104 having an L-shaped cross-section is attached to the radiation shielding panels 10 and 30 using screws 106.

[0037] Next, the joining of the radiation shielding panel 10 with the plate surface facing the depth direction and the end joining member 130, and the joining of the radiation shielding panel 10 with the plate surface facing the vertical direction and the end joining member 130 will be described.

[0038] As shown in FIG. 6(B), the end joining member 130 is formed of a member having a rectangular cross section and ensuring radiation shielding properties. In the end joining member 130, positioning members 132a and 132b, which are solid members having a rectangular cross section, are provided to extend in the width direction on the opposing surfaces 130a and 130b that face the radiation shielding panel 10. By inserting the recesses 40 of the radiation shielding panel 10 into the positioning members 132a and 132b, respectively, the radiation shielding panel 10 and the end joining member 130 are joined together.

[0039] Next, the joining of the radiation shielding panel 10 with the end joining member 150 where the plate surface faces the depth direction, and the joining of the radiation shielding panel 10 with the end joining member 150 where the plate surface faces the vertical direction will be described.

[0040] As shown in FIG. 6(B), the end joining member 150 is formed of a member having a rectangular cross section and ensuring radiation shielding properties. In the end joining member 150, positioning members 152a and 152b, which are solid members having a rectangular cross section, are provided to extend in the width direction on the opposing surfaces 150a and 150b that face the radiation shielding panel 10. By inserting the recesses 40 of the radiation shielding panel 10 into the positioning members 152a and 152b, respectively, the radiation shielding panel 10 and the end joining member 150 are joined together.

[0041] In addition, the joining of the radiation shielding panel 10 with the end joining member 120 where the plate surface faces the width direction, the joining of the radiation shielding panel 10 with the end joining member 120 where the plate surface faces the vertical direction, the joining of the radiation shielding panel 10 with the end joining member 140 where the plate surface faces the width direction, and the joining of the radiation shielding panel 10 with the end joining member 140 where the plate surface faces the vertical direction have the same structure as the aforementioned joining. Further, the end joining member 120 and the end joining member 140 are also formed of members that ensure radiation shielding properties, similar to the end joining member 130 and the end joining member 150.

[0042] (Others) Next, as shown in FIG. 7, a radiation shielding structure will be described when an air conditioner 170 having one end of a pipe 172 extending in the width direction is disposed in a state of passing through a through hole 10c formed in a radiation shielding panel 10 on the ceiling.

[0043] As shown in FIGS. 8(A) and 8(B), radiation shielding panels 180 and 186 are provided so as to surround the air conditioner 170 from the outside. The radiation shielding panel 180 includes a laminate 182 having a radiation shielding plate 182a and a urethane foam layer 182b laminated on the radiation shielding plate 182a, and a steel plate 184 integrally covering the laminate 182.

[0044] The radiation shielding panel 186 has a frame shape that covers the air conditioner 170 from the width direction and the depth direction, and includes a laminate 188 having a radiation shielding plate 188a and a urethane foam layer 188b laminated on the radiation shielding plate 188a, and a steel plate 190 integrally covering the laminate 188. A through hole 186a through which the pipe 172 passes is formed in the radiation shielding panel 186.

[0045] As shown in FIGS. 8 and 9, the radiation shielding panel 206 has a frame shape that covers the pipe 172 from the vertical direction and the depth direction, and includes a laminate 208 having a radiation shielding plate 208a and a urethane foam layer 208b laminated on the radiation shielding plate 208a, and a steel plate 210 integrally covering the laminate 208.

[0046] (Summary) As described above, in the joining structure 50 of the radiation shielding panel 10, when joining a pair of radiation shielding panels 10, the joining end faces 10a of the radiation shielding panels 10 are butted against each other, and the radiation shielding material 24 is inserted into the pair of recesses 40 so as to fit into the pair of recesses 40. Thereby, it is possible to suppress leakage of radiation from the joint portion of the pair of adjacent radiation shielding panels 10.

[0047] In addition, in the joining structure 50 of the radiation shielding panel 10, the radiation shielding material 24 is inserted into each of the pair of recesses 40 so as to fit into the recesses 40. Thereby, in the plate thickness direction, the relative positions of one radiation shielding panel 10 and the other radiation shielding panel 10 can be regulated.

[0048] In addition, the radiation shielding panel 10 used for the joining structure 50 of the radiation shielding panel 10 includes a laminate 16 having a radiation shielding plate 12 and a urethane foam layer 14 laminated on the radiation shielding plate 12, and a steel plate 20 integrally covering the laminate 16. In this way, by using the urethane foam layer 14, heat insulation and sound insulation can be ensured. In addition, by using the steel plate 20, water resistance and self-standing property can be ensured. In other words, by using the steel plate 20, a wall or the like can be constructed by the radiation shielding panels 10 and 30 without using a base material.

[0049] In addition, in the joining structure 50 of the radiation shielding panel 10, the recess 40 is formed by cutting out a part of the urethane foam layer 14. In other words, the recess 40 is formed without cutting out the radiation shielding plate 12. Therefore, compared with the case where the radiation shielding plate is cut out, it is possible to suppress the leakage of radiation from the joint portion of the pair of adjacent radiation shielding panels 10.

[0050] In addition, in the joining structure 50 of the radiation shielding panel 10, the size of the radiation shielding chamber 100 can be easily changed by changing the number of the radiation shielding panels 10 and the length of the end joining material. In other words, by adopting a unit configuration, the size of the radiation shielding chamber 100 can be easily changed.

[0051] <Second Embodiment> An example of the joining structure of the radiation shielding panel according to the second embodiment of the present disclosure will be described with reference to FIG. 10. For the second embodiment, the parts different from the first embodiment will be mainly described.

[0052] As shown in FIG. 10, the radiation shielding panels 10 joined using the joining structure 50 of the radiation shielding panel according to the second embodiment are stacked in two layers. And the joining position of the indoor-side radiation shielding panel 10 and the joining position of the outdoor-side radiation shielding panel 10 are shifted in the horizontal direction. Furthermore, the two stacked radiation shielding panels 10 are attached using bolts and nuts (reference signs omitted).

[0053] In this way, when the required performance for radiation shielding becomes high, it is possible to cope by stacking the radiation shielding panels 10.

[0054] Although the present disclosure has been described in detail with respect to specific embodiments, it is obvious to those skilled in the art that the present disclosure is not limited to such embodiments, and various other embodiments can be taken within the scope of the present disclosure. For example, in the above embodiment, the radiation shielding panel 10 constituting the ceiling and the radiation shielding panels 10 and 30 constituting the wall are joined using the end joining members 120 and 130. However, as shown in FIG. 6(A), the joining end faces 10a and 30a of the radiation shielding panels 10 and 30 constituting the wall are abutted against the plate surface of the radiation shielding panel 10 constituting the ceiling, and the radiation shielding panels 10 and 30 and the radiation shielding panel 10 may be joined using the channel member 104 and the screw 106. Similarly, although the radiation shielding panel 10 constituting the floor and the radiation shielding panels 10 and 30 constituting the wall are joined using the end joining members 140 and 150, as shown in FIG. 6(A), the joining end faces 10a and 30a of the radiation shielding panels 10 and 30 constituting the wall are abutted against the plate surface of the radiation shielding panel 10 constituting the floor, and the radiation shielding panels 10 and 30 and the radiation shielding panel 10 may be joined using the channel member 104 and the screw 106.

[0055] In addition, although not particularly described in the above embodiment, regarding the joints of the plurality of radiation shielding panels provided so as to surround the pipe 172 and the air conditioner 170 (FIGS. 8(A)(B), FIG. 9), a recess may be formed in one of the adjacent radiation shielding panels, a recess may also be formed in the other radiation shielding panel, and a radiation shielding material 24 having a rectangular cross section may be disposed so as to straddle this pair of recesses.

[0056] In addition, although not particularly described in the above embodiment, as shown in FIG. 6(A), a channel member 102 having an L-shaped cross section is provided so as to cover the corner formed by the radiation shielding panel 30 and the radiation shielding panel 10 from the outside, but the channel member 102 may not be provided.

[0057] In addition, in the above embodiment, the radiation shielding panels 10 and 30 are used to suppress the leakage of radiation from the indoor to the outdoor, but the radiation shielding panels 10 and 30 may be used to suppress the leakage of radiation from the outdoor to the indoor.

[0058] In addition, in the above embodiment, the radiation shielding chamber 100 in which an X-ray diagnostic apparatus or the like is disposed inside is taken as an example for explanation, but it may be a chamber used for research or the like in which an accelerator as a radiation source is disposed inside, it may be a chamber in which a radiation transmission test (RT), which is one of non-destructive inspections, is performed, it may be a room inside a nuclear power plant-related facility, or it may be a mobile chamber.

[0059] In addition, although not particularly described in the above embodiment, the steel plate 20 may be divided at any position. That is, a plurality of steel plates may be joined together to cover the laminate 16.

[0060] In addition, in the above embodiment, the radiation shielding panels 10 and 30 are used to cover the radiation shielding chamber 100 from six sides, but when the radiation shielding property of the floor surface, ceiling, etc. is already ensured by concrete or the like, the radiation shielding panels 10 and 30 may be used only for the walls.

Explanation of Reference Numerals

[0061] 10 Radiation shielding panel 10a Joint end face 12 Radiation shielding plate 14 Foamed urethane layer 16 Laminate 20 Steel plate 24 Radiation shielding material 30 Radiation shielding panel 30a Joint end face 40 Recess 50 Joint structure of radiation shielding panel

Claims

**Claim 1** A radiation shielding panel structure comprising a plurality of radiation shielding panels that are rectangular when viewed in the thickness direction of the plate, include a radiation shielding plate containing gypsum, and have recesses extending in the longitudinal direction formed in the joint end faces extending in the longitudinal direction, and the recesses are arranged to face each other; a radiation shielding material inserted so as to fit into the recesses of one of the radiation shielding panels and the recesses of the other radiation shielding panel in adjacent radiation shielding panels; and a joint structure of the radiation shielding panel. **Claim 2** The radiation shielding panel includes the radiation shielding plate and a steel plate covering the radiation shielding plate. The joint structure of the radiation shielding panel according to Claim 1. **Claim 3** The radiation shielding panel has a urethane foam layer laminated on the radiation shielding plate. The steel plate covers a laminate in which the urethane foam layer is laminated on the radiation shielding plate. The joint structure of the radiation shielding panel according to Claim 2. **Claim 4** The recess is formed by cutting out a part of the urethane foam layer. The joint structure of the radiation shielding panel according to Claim 3.

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