Radiation shielding panel and radiation shielding panel joint structure

Abstract

To provide a radiation shielding panel that comprises a radiation shielding plate containing plaster and does not require a base material.SOLUTION: A radiation shielding panel is provided, comprising a radiation shielding plate and a steel plate covering the radiation shielding plate.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a radiation shielding panel and a joining 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 arranging radiation shielding panels to form a radiation use room. It includes a case having a housing portion that extends in one direction and has a T-shaped cross section 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 side of one radiation shielding panel and the plate surfaces on the end face side of 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 (radioactive isotopes) in medical institutions such as hospitals are radiation management areas where leakage of radiation to the outside is prevented. To prevent leakage of radiation from such radiation management areas, lead plates dedicated to shielding may be used for the walls of the radiation management areas. However, in recent years, lead-free gypsum-based radiation shielding plates may be used.

[0005] However, since this gypsum-based radiation shielding plate has low rigidity, it was necessary to attach the radiation shielding plate to a base material such as a light steel frame for construction.

[0006] The present disclosure aims to obtain a configuration that does not require a base material in a radiation shielding panel including a radiation shielding plate containing gypsum.

Means for Solving the Problems

[0007] The radiation shielding panel according to the first aspect is characterized by comprising a radiation shielding plate containing gypsum and a steel plate covering the radiation shielding plate.

[0008] According to the above aspect, by covering the radiation shielding plate containing gypsum with a steel plate, self-standing property is ensured, and a wall or the like can be constructed with the radiation shielding panel without using a base material. In other words, in a radiation shielding panel including a radiation shielding plate containing gypsum, a configuration that does not require a base material can be obtained.

[0009] The radiation shielding panel according to the second aspect is the radiation shielding panel according to the first aspect, and has a foamed urethane layer laminated on the radiation shielding plate, and the steel plate covers a laminate in which the foamed urethane layer is laminated on the radiation shielding plate.

[0010] According to the above aspect, by having a foamed urethane layer laminated on the radiation shielding plate, the heat insulation property of the radiation shielding panel can be ensured.

[0011] The joining structure of the radiation shielding panel according to the third aspect is rectangular when viewed in the plate thickness direction, and a concave portion extending in the longitudinal direction is formed on a joining end face extending in the longitudinal direction. A plurality of radiation shielding panels according to claim 1 arranged such that the concave portions face each other, and a radiation shielding material inserted so as to fit into the concave portion of one of the radiation shielding panels and the concave portion of the other radiation shielding panel in the adjacent radiation shielding panels.

[0012] 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 the leakage of radiation from the joint portion of a pair of adjacent radiation shielding panels.

[0013] The joint structure of the radiation shielding panel according to the fourth aspect is the joint structure of the radiation shielding panel according to the third 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, and the recess is formed by cutting out a part of the urethane foam layer.

[0014] 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 out 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.

Advantages of the Invention

[0015] According to the present disclosure, in a radiation shielding panel including a radiation shielding plate containing gypsum, a configuration that does not require a base material can be obtained.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0017] <First Embodiment> An example of the radiation shielding panel and the joint structure of the radiation shielding panel 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 panel. The arrow W shown in each figure is orthogonal to the arrow H and indicates the horizontal direction, which is the width direction of the radiation shielding chamber. The arrow D shown in each figure is orthogonal to the arrows H and W and indicates the horizontal direction, which is the depth direction of the radiation shielding chamber.

[0018] First, the radiation shielding chamber will be described, and then the radiation shielding panel and the joint structure of the radiation shielding panel will be described. The radiation shielding chamber according to the present embodiment is a chamber having a radiation source inside, for example, an examination room having a radiation source for X-ray examination in a medical institution such as a hospital.

[0019] (Radiation Shielding Chamber 100) As shown in FIG. 1, the radiation shielding room 100 is in the shape of a rectangular parallelepiped extending in the width direction, and is composed of 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.

[0020] Two end joining members 120 are provided and arranged so as to sandwich the ceiling of the radiation shielding room 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 room 100 in the depth direction and extend in the width direction.

[0021] Also, two end joining members 140 are provided and arranged so as to sandwich the floor of the radiation shielding room 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 room 100 in the depth direction and extend in the width direction.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Also, between the end joining members 120 and 140 facing each other in the vertical direction, two radiation shielding panels 10 are arranged side by side in the depth direction to form a wall. And a door 34 with ensured radiation shielding property is attached to the radiation shielding panel 10 facing the outer side in the width direction (right side in the figure).

[0026] (Radiation shielding panels 10, 30) As shown in FIG. 1, the radiation shielding panels 10, 30 are used for the walls, ceiling, and floor (not shown) of the radiation shielding chamber 100. That is, the radiation shielding panels 10, 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.

[0027] -Radiation shielding panel 10- As shown in FIG. 2, the radiation shielding panel 10 is rectangular when viewed from the depth direction and extends in the vertical direction. On the radiation shielding panel 10, a pair of joining end faces 10a facing the width direction and a pair of joining end faces 10b facing the vertical direction are formed. Further, on the joining end faces 10a and 10b, recesses 40 with a rectangular cross-section are formed extending in the longitudinal direction. The joining end face 10a is an example of the joining end face extending in the longitudinal direction.

[0028] 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, the integral covering means covering the laminate 16 along the outer shape of the laminate 16.

[0029] Further, 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, as an example, the thickness of the radiation shielding plate 12 is 15 [mm]. Note that, for example, RadBoard (registered trademark)-X (Takenaka Corporation) can be used for the radiation shielding plate 12.

[0030] The foamed urethane layer 14 is laminated on the radiation shielding plate 12, and a concave portion 40 is formed by cutting out a part of the foamed urethane layer 14 in an L shape. In other words, the thickness of the end portion of the foamed urethane layer 14 is made thinner than the thickness of the portion other than the end portion. And, as an example, the thickness of the portion other than the end portion in the foamed urethane layer 14 is 35 [mm].

[0031] The steel plate 20 integrally covers the laminate 16 in which the radiation shielding plate 12 and the foamed urethane 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].

[0032] Further, as an example, the depth of the above-described concave portion 40 is 26 [mm], and the opening width of the concave portion 40 is 17 [mm]. Note that the foamed urethane layer 14 is formed, for example, by foaming and filling urethane inside the steel plate 20 in which the radiation shielding plate 12 is disposed.

[0033] -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 rectangular in shape extending in the vertical direction when viewed from the depth direction. Concave portions 40 having a rectangular cross section are formed on a pair of joint end faces 30a facing in the width direction and a pair of joint end faces 30b facing in the vertical direction in the radiation shielding panel 30. And, as shown in FIG. 1, the length in the width direction of the radiation shielding panel 30 is made 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.

[0034] (Joint Structure of Radiation Shielding Panel 10) First, the joint structure 50 of the radiation shielding panels 10 used for the wall with the plate surface facing the depth direction will be described. Note that the joint structure of the radiation shielding panel 10 and the radiation shielding panel 30 has the same structure.

[0035] For joining 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 for the radiation shielding material 24.

[0036] In the joint structure 50 of the radiation shielding panel 10, the joint 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.

[0037] 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 joint end face 30a of the radiation shielding panel 30 is abutted against the plate surface of the radiation shielding panel 10. Then, 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.

[0038] 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.

[0039] 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, 132b having a rectangular cross-section and being solid materials extend in the width direction on the opposing surfaces 130a, 130b facing the radiation shielding panel 10. By inserting the recesses 40 of the radiation shielding panel 10 into the positioning members 132a, 132b respectively, the radiation shielding panel 10 and the end joining member 130 are joined together.

[0040] Next, the joining of the radiation shielding panel 10 with the plate surface facing the depth direction and the end joining member 150, and the joining of the radiation shielding panel 10 with the plate surface facing the vertical direction and the end joining member 150 will be described.

[0041] 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, 152b having a rectangular cross-section and being solid materials extend in the width direction on the opposing surfaces 150a, 150b facing the radiation shielding panel 10. By inserting the recesses 40 of the radiation shielding panel 10 into the positioning members 152a, 152b respectively, the radiation shielding panel 10 and the end joining member 150 are joined together.

[0042] In addition, the joining of the radiation shielding panel 10 with its plate surface facing the width direction and the end joining member 120, the joining of the radiation shielding panel 10 with its plate surface facing the vertical direction and the end joining member 120, as well as the joining of the radiation shielding panel 10 with its plate surface facing the width direction and the end joining member 140, and the joining of the radiation shielding panel 10 with its plate surface facing the vertical direction and the end joining member 140 have the same structure as the aforementioned joining. Furthermore, the end joining members 120 and 140 are also formed of members that ensure radiation shielding properties, similar to the end joining members 130 and 150.

[0043] (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 connected thereto is disposed in a state of passing through a through hole 10c formed in the radiation shielding panel 10 of the ceiling.

[0044] As shown in FIGS. 8(A) and (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.

[0045] The radiation shielding panel 186 is in 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.

[0046] As shown in FIGS. 8 and 9, the radiation shielding panel 206 is in 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.

[0047] (Summary) As described above, in the radiation shielding panel 10, the steel plate 20 covers the radiation shielding plate 12 containing gypsum, and the rigidity is improved to ensure self - standing property. Thereby, a wall or the like can be constructed by the radiation shielding panel 10 without using a base material. In other words, in the radiation shielding panel 10 configured to include the radiation shielding plate 12 containing gypsum, a configuration that does not require a base material can be obtained.

[0048] Also, in the radiation shielding panel 10, by having the urethane foam layer 14 laminated on the radiation shielding plate 12, the sound insulation and heat insulation properties of the radiation shielding panel 10 are ensured, and by using the steel plate 20, the water resistance is ensured.

[0049] Also, 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 together, 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 the leakage of radiation from the joint portion of the pair of adjacent radiation shielding panels 10.

[0050] Also, in the joining structure 50 of the radiation shielding panel 10, the radiation shielding material 24 is inserted into each of the recesses 40 so as to fit into the pair of recesses 40. Thereby, in the plate thickness direction, the relative position between one radiation shielding panel 10 and the other radiation shielding panel 10 can be regulated.

[0051] Also, 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. For this reason, 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.

[0052] Also, 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 radiation shielding panels 10 and the length of the end joining members. In other words, by adopting a unit configuration, the size of the radiation shielding chamber 100 can be easily changed.

[0053] <Second Embodiment> An example of a radiation shielding panel and a joining structure of the radiation shielding panel according to the second embodiment of the present disclosure will be described with reference to FIG. 10. Note that, for the second embodiment, mainly the parts different from the first embodiment will be described.

[0054] 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 positions of the radiation shielding panels 10 on the indoor side and the joining positions of the radiation shielding panels 10 on the outdoor side are shifted in the horizontal direction. Further, the two stacked radiation shielding panels 10 are attached using bolts and nuts (reference signs omitted).

[0055] In this way, when the required performance for shielding against radiation becomes high, it can be dealt with by stacking the radiation shielding panels 10.

[0056] 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 that various other embodiments can be taken within the scope of the present disclosure. For example, in the above embodiment, the radiation shielding panels 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, in the above embodiment, the radiation shielding panels 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. 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 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.

[0057] Also, in the above embodiment, although not particularly described, with respect to the joint portions (FIGS. 8(A)(B), FIG. 9) of the plurality of radiation shielding panels provided so as to surround the pipe 172 and the air conditioner 170, 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 the radiation shielding material 24 having a rectangular cross section may be disposed so as to straddle this pair of recesses.

[0058] Also, in the above embodiment, although not particularly described, as shown in FIG. 6(A), the 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.

[0059] In addition, in the above-described 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 also be used to suppress the leakage of radiation from the outdoor to the indoor.

[0060] In addition, in the above-described embodiment, the radiation shielding chamber 100 in which an X-ray diagnostic apparatus or the like is disposed inside has been described as an example. However, it may be a room used for research or the like in which an accelerator as a radiation source is disposed inside, or it may be a room 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 room.

[0061] In addition, in the above-described embodiment, although not particularly described, 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.

[0062] In addition, in the above-described embodiment, the radiation shielding panels 10 and 30 are used to cover the radiation shielding chamber 100 from six sides. However, when the shielding property of radiation has already been ensured by concrete or the like for the floor surface, ceiling, etc., only the radiation shielding panels 10 and 30 may be used for the walls.

Explanation of Reference Numerals

[0063] 10 Radiation shielding panel 12 Radiation shielding plate 14 Urethane foam layer 16 Laminate 20 Steel plate 24 Radiation shielding material 30 Radiation shielding panel 40 Recess 50 Joint structure of radiation shielding panel

Claims

1. A radiation shielding panel comprising a radiation shielding plate containing gypsum, and a steel plate covering the radiation shielding plate.

2. having a urethane foam layer laminated on the radiation shielding plate, wherein the steel plate covers a laminate in which the urethane foam layer is laminated on the radiation shielding plate, The radiation shielding panel according to Claim 1.

3. The radiation shielding panel according to Claim 1, wherein the radiation shielding panel is rectangular when viewed in the plate thickness direction, a recess extending in the longitudinal direction is formed in a joint end face extending in the longitudinal direction, and a plurality of the radiation shielding panels are arranged so that the recesses face each other, and a radiation shielding material inserted so as to fit into the recess of one of the adjacent radiation shielding panels and the recess of the other radiation shielding panel. A joint structure of a radiation shielding panel comprising:

4. The radiation shielding panel, having a urethane foam layer laminated on the radiation shielding plate, wherein the steel plate covers a laminate in which the urethane foam layer is laminated on the radiation shielding plate, wherein 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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