JP2011220736A - Radiation shielding wall, method for constructing the same, and method for dismantling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation shielding wall which is easily constructed and dismantled while securing radiation shielding performance, a method for constructing the same which easily constructs the same, and a method for dismantling the same which easily dismantles the same.SOLUTION: A space 115 between a pair of iron plates 110 and 120 disposed opposing to each other is filled with a steel ball 150 from a filling port 130 in the upper part of the iron plate 120, and thereby the radiation shielding wall 100 is easily constructed while securing radiation shielding performance. In addition, the steel ball 150 is discharged from a discharge port 140 in the lower part of the iron plate 120, and thereby the radiation shielding wall 100 is easily dismantled. In reconstruction of the radiation shielding wall 100 after the dismantlement, the radiation shielding wall 100 can be easily reconstructed by nearly the same process as the first construction process.

Description

  The present invention relates to a radiation shielding wall, a construction method for the radiation shielding wall, and a dismantling method for the radiation shielding wall.

  As shown in FIG. 11, in a nuclear power generation related facility, a nuclear fuel cycle facility, or the like, equipment is carried in from an entrance / exit (opening) 802 of the RC wall 800, and the entrance / exit 802 is closed by a radiation shielding wall 900 after the equipment is carried in. Further, when performing maintenance work or equipment update (replacement) work on the equipment that has been carried in, the radiation shielding wall 900 is broken and the entrance / exit 802 is opened again to enter and exit. Then, after the work is completed, the entrance / exit 802 is closed again with the radiation shielding wall 900.

  As shown in FIG. 10, a radiation shielding wall 900 is constructed by a wet construction method in which heavy concrete blocks are laminated and then reinforced with a mortar wire trust or the like, or a dry construction method in which heavy concrete blocks are laid up.

  As an example other than the radiation shielding wall constructed by stacking heavy concrete blocks in this way, Patent Document 1 is filled with a plurality of bags each containing raw concrete between two plates, and the concrete in the bags is A radiation shielding wall constructed by curing and curing is described.

  Patent Document 2 discloses a radiation shielding system in which earth and sand are filled into the wall and the earth and sand filled by removing the bottom plate can directly contact the ground so that moisture in the ground can penetrate into the earth and sand. Walls are listed.

  Patent Document 3 describes a radiation shielding wall member in which a casing is filled with a granular shielding material.

  Patent Document 4 describes a radiation shielding material in which a hollow metal casing is filled with a boron-containing fluid and a metal oxide to be solidified.

JP-A-4-328498 JP 2000-145202 A Japanese Patent Laid-Open No. 62-129787 Japanese Patent Laid-Open No. 5-142392

  Thus, various radiation shielding walls have been proposed. And it is calculated | required to construct | assemble a radiation shielding wall easily and to dismantle a radiation shielding wall easily, ensuring radiation shielding performance.

  In view of the above, the present invention provides a radiation shielding wall that can be easily constructed and disassembled while ensuring radiation shielding performance, a radiation shielding wall construction method that is easy to construct, and a radiation shielding wall dismantling method that is easy to disassemble. Is the purpose.

  According to the first aspect of the present invention, a pair of plate members disposed opposite to each other, a shielding material filled between the pair of plate members, and an upper portion of one of the pair of plate members are closed and opened. A first opening capable of filling the shielding material between the pair of plate members and a lower portion of one of the pair of plate members, and can be closed and opened, and the shielding material is discharged. A possible second opening.

In the first aspect of the present invention, the radiation shielding wall is easily constructed while ensuring the radiation shielding performance by filling the shielding material from the first opening between the pair of plate members installed facing each other. The
Moreover, the radiation shielding wall is easily disassembled by discharging the shielding material from the second opening.
Furthermore, when reconstructing after dismantling, the radiation shielding wall can be easily constructed in substantially the same construction process as the construction process initially constructed.

  Moreover, the radiation shielding performance according to the kind of radiation is easily ensured by selecting and filling the shielding material to be filled with a material having a large shielding effect according to the kind of radiation.

  The shielding material filled between the pair of plate members may have any radiation shielding performance, can be filled from the first opening, and can be discharged from the second opening.

  Here, the radiation may not be completely blocked by the “radiation shielding wall”. Even if a minute amount of radiation less than a predetermined value such as a standard or a law is transmitted, it is assumed that the radiation is shielded by the radiation shielding wall.

  According to a second aspect of the present invention, the shielding material is made of a spherical metal.

  In invention of Claim 2, since the shielding material is comprised with the spherical metal, it becomes a radiation shielding wall excellent in radiation shielding performance. Further, it is easy to fill the shielding material from the first opening, and to discharge it from the second opening.

  In a third aspect of the invention, the pair of plate members are made of iron plates.

  In invention of Claim 3, since a board member is comprised with the iron plate which has a radiation shielding effect, radiation shielding performance improves. In addition, the strength of the radiation shielding wall is improved.

  The invention of claim 4 is a construction method of a radiation shielding wall in which a shielding material is filled between a pair of plate members installed opposite to each other, and the plate member installation for installing the pair of plate members facing each other A step of filling a shielding material between the pair of plate members from a first opening provided in one upper part of the pair of plate members, and closing the first opening. And a first opening closing step.

  In the invention of claim 4, the shielding material is filled from the first openings of the pair of plate members installed facing each other, and the first opening is closed, so that the radiation shielding performance is secured and the radiation shielding wall is secured. Is easily built.

  The invention of claim 5 is a method for dismantling a radiation shielding wall in which a shielding material is filled between a pair of plate members disposed opposite to each other, and is provided at a lower portion of one of the pair of plate members. A shielding material discharging step for discharging the shielding material from the two openings, and a plate member removing step for removing the pair of plate members.

  In the invention of claim 5, the radiation shielding wall is easily disassembled by discharging the shielding material from the second openings of the pair of plate members installed facing each other and removing the plate member. It is also easy to reconstruct the radiation shielding wall after dismantling.

  According to the invention described in claim 1, by filling the shielding material from the first opening, the radiation shielding wall can be easily constructed while securing the radiation shielding performance, and from the second opening. By discharging the shielding material, the radiation shielding wall can be easily disassembled.

  According to invention of Claim 2, it is easy to fill a shielding material from a 1st opening part, and to discharge | emit from a 2nd opening part, ensuring radiation shielding performance.

  According to invention of Claim 3, the radiation shielding performance and proof stress of a radiation shielding wall improve.

  According to invention of Claim 4, a radiation shielding wall can be constructed | assembled easily, ensuring radiation shielding performance.

  According to the fifth aspect of the present invention, the radiation shielding wall can be easily disassembled.

(A) is a front view which shows RC wall by which the entrance and exit were closed with the radiation shielding wall which concerns on 1st embodiment of this invention, (B) is a longitudinal cross-sectional view along the BB line of (A). It is. It is an expansion section perspective view showing the upper part of a radiation shielding wall concerning a first embodiment of the present invention. It is an expanded sectional perspective view which shows the lower part of the radiation shielding wall which concerns on 1st embodiment of this invention. It is process drawing which shows the process (A) and process (B) of a construction process of the radiation shielding wall concerning 1st embodiment of this invention. It is process drawing which shows the process (C) and process (D) of a construction process of the radiation shielding wall concerning 1st embodiment of this invention. It is process drawing which shows the process (A) and process (B) of a dismantling process of the radiation shielding wall which concern on 1st embodiment of this invention. (A) is a front view which shows RC wall by which the entrance and exit were closed with the radiation shielding wall which concerns on 2nd embodiment of this invention, (B) is a longitudinal cross-sectional view along the BB line of (A). It is. It is process drawing which shows the process (A) and process (B) of a construction process of the radiation shielding wall concerning 2nd embodiment of this invention. It is process drawing which shows the process (C) and process (D) of a construction process of the radiation shielding wall concerning 2nd embodiment of this invention. Steps (A) and (B) of the revision process of the radiation shielding wall according to the second embodiment of the present invention (A) is a front view which shows RC wall by which the entrance and exit were closed with the radiation shielding wall of the modification of 1st embodiment of this invention, (B) is a longitudinal section along the BB line of (A). FIG. (A) is a front view which shows RC wall by which the entrance was closed with the radiation shielding wall to which this invention is not applied, (B) is a longitudinal cross-sectional view along the BB line of (A). . (A) is a front view which shows RC wall in the state where the entrance / exit was opened, (B) is a longitudinal cross-sectional view along the BB line of (A).

<First embodiment>
The radiation shielding wall 100 according to the first embodiment of the present invention will be described.

FIG. 11 shows an RC wall (reinforced concrete wall) 800 constituting a structure that handles radiation, such as a nuclear power generation related facility and a nuclear fuel cycle facility. The RC wall 800 has a thickness sufficient to shield radiation. Further, the RC wall 800 is provided with an entrance (opening) 802 having a rectangular shape when viewed from the front, and various devices are carried from the entrance 802.
And the entrance / exit 802 is closed by the radiation shielding wall 100 which concerns on 1st embodiment of this invention after carrying in various apparatuses. FIG. 1 shows a state where the entrance / exit 802 of the RC wall 800 is closed by the radiation shielding wall 100.

In addition, IN in each figure shows the inner side of the room into which various apparatuses are carried in, and OUT shows the outer side of a room. That is, various devices are carried from the outside of the room to the inside of the room through the entrance / exit 802.
Further, the horizontal direction (left-right direction) toward the RC wall 800 is defined as the X direction, the vertical direction is defined as the Z direction, and the direction orthogonal to the X direction and the Z direction is defined as the direction from the inside of the entrance / exit 802 to the outside ) In the Y direction.
In the present embodiment, the entrance / exit 802 has a width of 3 m and a height of 4 m.

  Next, the structure of the radiation shielding wall 100 will be described with reference to FIGS. 1 to 3 and FIG.

  1-3 and FIG. 4-2 (D), the radiation shielding wall 100 has a pair of iron plate 110 and the iron plate 120 arrange | positioned facing the Y direction. The iron plate 110 is disposed on the inner side, and the iron plate 120 is disposed on the outer side (see FIGS. 1B, 2 and 3).

  As shown in FIG. 2, a steel fixing member 500 having a substantially T-shaped cross section, the longitudinal direction of which is arranged along the X direction, is spaced apart in the Y direction on the beam 804 that forms the upper part of the entrance / exit 802. It is fixed with anchor bolts 520.

  As shown in FIG. 3, a steel fixing member 500 having a substantially T-shaped cross section, the longitudinal direction of which is arranged along the X direction, is spaced apart in the Y direction on a floor slab 806 constituting the lower part of the entrance / exit 802. And anchor bolts 520.

  These fixing members 500 have a horizontal flange 502 and a vertical web 504. In addition, the flange 502 of the fixing member 500 is fixed to the beam 804 or the floor slab 806 described above with an anchor bolt 520 (see also FIG. 4A). The web 504 of the fixing member 500 is provided with a male screw shaft 506 that protrudes from the inside toward the outside (see also FIG. 4A). A plurality of male screw shafts 506 are provided at intervals in the X direction.

  As shown in FIGS. 1 to 3, the iron plates 110 and 120 constituting the radiation shielding wall 100 are fixed to the mounting holes 122 and 124 (see FIG. 4A) formed in the upper and lower portions. 500 is fixed by being tightened with a nut 508 (FIGS. 2 and 3) (see also FIGS. 4-1 (A) and (B), details of the construction process will be described later) To do).

  As shown in FIG. 2, a cylindrical filling port 130 is provided on an upper portion of the iron plate 120 disposed on the outside. The filling port 130 is closed with a removable lid 132. A plurality of filling ports 130 are provided at intervals in the X direction (see FIG. 1).

  As shown in FIG. 3, a circular hole-shaped discharge port 140 is provided at the lower part of the iron plate 120 arranged on the outside. The outlet 140 is closed with a removable lid 142. A plurality of outlets 140 are provided at intervals in the horizontal direction (see FIG. 1).

  As shown in FIG. 1 (B), FIG. 2, FIG. 3, and FIG. 4-2 (D), between the iron plate 120 arranged outside the radiation shielding wall 100 and the iron plate 110 arranged inside, A steel ball 150 is filled. In the present embodiment, the diameter of the steel ball 150 is about 11 mm.

  Next, a construction process of the radiation shielding wall 100, that is, a process of closing the entrance / exit 802 with the radiation shielding wall 100 after carrying in various devices will be described with reference to FIG.

  As shown in FIG. 4A, a steel fixing member 500 having a substantially T-shaped cross section is fixed to the beam 804 constituting the upper part of the entrance / exit 802 and the floor slab 806 constituting the lower part with anchor bolts 520. .

  As shown in FIGS. 4A and 4B, first, the inner iron plate 110 is fixed to the fixing member 500. Next, the outer iron plate 120 is fixed to the fixing member 500. As described above, the male screw shaft 506 of the fixing member 500 is passed through the mounting holes 122 and 124 formed in the upper and lower portions of the iron plates 110 and 120, and fastened with the nut 508 (see also FIGS. 2 and 3). It is fixed by doing.

  As shown in FIG. 4-2 (C), a steel ball 150 is formed between the pair of iron plates 110, 120 from the filling port 130 in a state where the lower discharge port 140 of the outer iron plate 120 is closed by a lid 142. The filled space 115 is filled.

  As shown in FIG. 4D, after the steel ball 150 is filled up to the upper end portion of the space 115 between the pair of iron plates 110 and 120, the filling port 130 is closed with a lid 132.

  If it is difficult for the steel ball 150 to be filled above the filling port 130, the upper portion of the space 115 may be filled with a filler such as mortar or grout.

  Next, a step of dismantling the radiation shielding wall 100, that is, a step of removing the radiation shielding wall 100 and reopening the entrance / exit 802 will be described with reference to FIG.

  As shown in FIG. 5A, the lid 142 of the discharge port 140 at the bottom of the outer iron plate 120 is removed, and the steel ball 150 is discharged from the discharge port 140.

  As shown in FIG. 5B, when the steel ball 150 is almost discharged, the outer iron plate 120 is first removed from the fixing member 500 and removed. Next, the inner iron plate 110 is removed from the fixing member 500 and removed, and the doorway 802 is opened.

  The process of reconstructing the radiation shielding wall 100, that is, the process of closing the entrance / exit 802 with the radiation shielding wall 100 can be performed in the same procedure as the construction process described above.

  Next, the operation of this embodiment will be described.

Filling the space 115 between the pair of iron plates 110 and 120 facing each other with the steel ball 150 from the filling port 130 at the top of the iron plate 120 ensures the radiation shielding performance, and the radiation shielding wall 100 is secured. Easy to build.
Moreover, the radiation shielding wall 100 is easily disassembled by discharging the steel ball 150 from the discharge port 140 under the iron plate 120.
Further, when the radiation shielding wall 100 is reconstructed after disassembly, the radiation shielding wall 100 can be easily reconstructed in substantially the same process as the construction process initially constructed.

  In addition, the steel ball 150 is excellent in radiation shielding performance, and can be easily filled from the filling port 130 and discharged from the discharge port 140.

  Furthermore, since the iron plates 110 and 120 have a high radiation shielding effect, the thickness (Y direction width) of the radiation shielding wall 100 can be reduced. Moreover, since the iron plates 110 and 120 have high rigidity, it is easy to ensure the proof strength of the radiation shielding wall 100.

  Further, the radiation shielding wall 100 can be constructed and disassembled by work only from the outside. That is, the entrance / exit 802 can be closed and opened by the radiation shielding wall 100 without working from the inside of the room.

  Here, when the entrance / exit 802 is closed by the radiation shielding wall 900 constructed by stacking heavy concrete blocks to which the present embodiment shown in FIG. 10 is not applied, the radiation shielding wall 900 is used to open the once closed entrance / exit 802. It needs to be destroyed. Moreover, in order to close the entrance / exit 802 again, it is necessary to build up the radiation shielding wall 900 by newly stacking heavy concrete blocks.

  On the other hand, the radiation shielding wall 100 of this embodiment is easily constructed and disassembled as described above, and the workability is improved as compared with the radiation shielding wall 900 constructed by stacking heavy concrete blocks. It is also possible to reuse the member after dismantling.

<Modification of First Embodiment>
Next, a radiation shielding wall 101 according to a modification of the first embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 9, the central portions of the iron plates 111 and 121 are constituted by corrugated steel plates 113 and 115. The corrugated steel plates 113 and 115 are configured by bending a steel plate into a corrugated shape, and the direction of the crease is in the horizontal direction. As the material of the corrugated steel plates 113 and 115, ordinary steel (for example, SM490, SS400, etc.), low yield point steel (for example, LY225, etc.), or the like is used.

  Since the configuration other than this is the same as that of the first embodiment, description thereof is omitted. Moreover, since the construction process, the disassembly process, and the reconstruction process of the radiation shielding wall 101 are the same as those in the first embodiment, the description thereof is omitted.

  Next, the operation of the modification will be described.

  The corrugated steel plates 113 and 115 exhibit seismic performance by shear deformation. Further, by designing the corrugated steel plates 113 and 115 to yield with respect to the horizontal force, the vibration energy is absorbed by the hysteresis energy, and the damping effect is exhibited. Therefore, the radiation shielding wall 101 is excellent in earthquake resistance and vibration control performance.

  Furthermore, by forming a part of the iron plates 111 and 121 into a corrugated shape, the shear buckling strength / deformation performance can be improved, and stiffening ribs as a means for preventing shear buckling than when using a normal iron plate. Can be reduced.

<Second embodiment>
Next, the radiation shielding wall 200 according to the second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment, and the overlapping description is abbreviate | omitted.

First, the structure of the radiation shielding wall 100 is demonstrated using FIG. 6, FIG. 7-2 (D).
As shown in FIG. 7-2 (D), the radiation shielding wall 200 includes an iron plate 210 disposed on the inner side and an iron plate 220 disposed on the outer side. Further, the iron plate 210 and the iron plate 220 are arranged to face each other with an interval in the Y direction.

  A steel fixing member 500 having a substantially T-shaped cross section is fixed to the beam 804 constituting the upper part of the entrance / exit 802 and the floor slab 806 constituting the lower part with anchor bolts 520 at intervals in the Y direction.

  The steel plates 210 and 220 constituting the radiation shielding wall 100 are passed through the mounting holes 122 and 124 (see FIG. 7-1 (A)) formed in the upper part and the lower part, and the male screw shaft 506 of the fixing member 500 is passed through the nuts. It is fixed by being fastened at 508 (see also FIGS. 7-1 (A) and (B), details of the construction process will be described later).

  In the upper part of the iron plate 220 disposed on the outside, an opening 230 having a substantially rectangular shape in front view with the Y direction as the longitudinal direction is provided. The opening 230 is closed by joining a plate-shaped lid 234 larger than the opening 230 to the iron plate 220.

  A space 215 between the iron plate 220 arranged outside the radiation shielding wall 200 and the iron plate 210 arranged inside is filled with a steel ball 150.

  Next, a construction process of the radiation shielding wall 200, that is, a process of closing the entrance / exit 802 with the radiation shielding wall 200 after carrying in various devices will be described with reference to FIG.

  As shown in FIG. 7A, an iron fixing member 500 having a substantially T-shaped cross section is fixed to the beam 804 constituting the upper part of the entrance / exit 802 and the floor slab 806 constituting the lower part with an anchor bolt 520. .

As shown in FIGS. 7A and 7B, first, the inner iron plate 210 is fixed to the fixing member 500. Next, the outer iron plate 220 is fixed to the fixing member 500. Further, as described above, the male screw shaft 506 of the fixing member 500 is passed through the mounting holes 122 and 124 formed in the upper and lower portions of the iron plates 210 and 220, and fastened with the nut 508 (see also FIGS. 2 and 3). Is fixed.
At this time, the opening 230 is not formed in the iron plate 220.

  As shown in FIG. 7-1 (B), the upper plate 232 of the outer iron plate 220 is cut out and the opening 230 is opened. Any method may be used for opening the opening 230 (how to cut the plate 232). For example, you may cut | disconnect with a gas burner.

  As shown in FIG. 7-2 (C), the steel ball 150 is filled into the space 215 formed between the pair of iron plates 210 and 220 through the opening 230.

  As shown in FIG. 7-2 (D), after the steel ball 150 is filled up to the upper end of the space 215 between the pair of iron plates 210 and 220, a plate-shaped lid larger than the opening 230 (plate 232). 234 is joined to the iron plate 220 and the opening 230 is closed. Note that any method may be used for joining the plate-like lid 234. For example, you may join by welding joining.

  If it is difficult for the steel ball 150 to be filled above the upper opening 230, the upper portion of the space 215 may be filled with a filler such as mortar or grout.

  Moreover, in the said construction process, although the opening part 230 was formed after installing the iron plate 220, it is not limited to this. After forming the opening 230 in advance, the iron plate 220 may be installed.

  Next, a step of disassembling the radiation shielding wall 200, that is, a step of removing the radiation shielding wall 200 and reopening the entrance / exit 802 will be described with reference to FIG.

  As shown in FIG. 8A, the lower plate 242 of the outer iron plate 220 is cut out, and the opening 240 is opened. The opening 240 is substantially rectangular in front view with the Y direction as the longitudinal direction. Note that any method may be used to open the opening 240 (how to cut the plate 242). For example, you may cut | disconnect with a gas burner.

  The steel ball 150 is discharged from the opened discharge port 240.

  As shown in FIG. 8B, when the steel ball 150 is almost discharged, the outer iron plate 220 is first removed from the fixing member 500 and removed. Next, the inner iron plate 210 is removed from the fixing member 500 and removed, and the doorway 802 is opened.

  The process of reconstructing the radiation shielding wall 200, that is, the process of closing the entrance / exit 802 with the radiation shielding wall 100 can be performed in the same procedure as the construction process described above.

  At this time, the plate-like lid 244 that closes the upper opening 230 of the iron plate 220 is removed before the steel ball 150 is filled, and the lower opening 240 is a plate-like lid 244 (see FIG. 6). ) And plug.

  In this embodiment as well, as in the first embodiment, part or all of the iron plates 210 and 220 may be formed of a corrugated steel plate.

  In addition, since the effect | action of this embodiment is the same as that of 1st embodiment, description is abbreviate | omitted.

  Here, in the radiation shielding wall 100 of the first embodiment, the radiation shielding wall 101 of the modified example, and the radiation shielding wall 200 of the second embodiment, the steel ball 150 having a diameter of about 11 mm is filled as a shielding material. It is not limited to. A steel ball or iron powder smaller than the steel ball 150 may be used. Alternatively, a spherical iron lump larger than the steel ball 150 may be used. A plurality of types of steel balls having different sizes may be filled. That is, a small steel ball (iron powder) may be filled in a gap between large steel balls. Furthermore, the shape may be other than spherical.

  Moreover, you may fill with earth and sand, a stone, etc. as a shielding material. Also, a liquid such as water may be filled together. However, materials that solidify after filling, such as mortar and grud, are not preferable because they are not discharged from the discharge port or are difficult to discharge.

  In short, any material that can be filled from the filling port 130 and the opening 230 and can be discharged from the discharge port 140 and the opening 240 and has radiation shielding performance can be used as a shielding material.

  Moreover, radiation shielding performance is easily ensured by selecting and filling a shielding material (material) having a large shielding effect corresponding to the type of radiation handled by this facility. Further, a plurality of types of shielding materials may be filled.

  The radiation may not be completely blocked by the radiation shielding wall. Even if a very small amount of radiation that is less than a numerical value determined in advance by standards or laws is transmitted, it is assumed that the radiation is shielded by the radiation shielding wall.

  Moreover, you may arrange | position board members other than the iron plates 110,120,210,220. For example, a plate member made of wood or resin may be used. In short, any material may be used as long as strength as a wall is ensured.

  Note that some or all of the iron plates 110, 120, 210, and 220 may be low yield point steel. By setting it as such a structure, the low yield point steel which comprises a part or all of an iron plate plastically deforms and absorbs energy with the shear force which an iron plate bears. That is, the radiation shielding wall functions as a damping wall.

  Further, the fixing method of the iron plates 110, 120, 210, and 220 is not limited to fixing by the fixing member 500. Any fixing method may be used.

  In the above embodiment, the radiation shielding walls 100, 101, 200 close the entrance / exit 802 of the RC wall 800, that is, a part of the RC wall 800 is configured by the radiation shielding walls 100, 101, 200. It is not limited to. The entire wall may be composed of a radiation shielding wall.

  The present invention is not limited to the above embodiment. Needless to say, the present invention can be implemented in various modes without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Radiation shielding wall 101 Radiation shielding wall 110 Iron plate (plate member)
111 Iron plate (plate member)
120 Iron plate (plate member)
121 Iron plate (plate member)
130 Filling port (first opening)
140 Discharge port (second opening)
150 Steel ball (spherical metal, shielding material)
200 Radiation shielding wall 210 Iron plate (plate member)
220 Iron plate (plate member)
230 Opening (first opening)
240 opening (second opening)

Claims (5)

A pair of plate members installed facing each other;
A shielding material filled between the pair of plate members;
A first opening provided at one upper portion of the pair of plate members, capable of being closed and opened, and capable of filling the shielding material between the pair of plate members;
A second opening that is provided at one lower portion of the pair of plate members, can be closed and opened, and can discharge the shielding material;
Radiation shielding wall comprising. The shielding material is made of a spherical metal,
The radiation shielding wall according to claim 1. A pair of said plate members are comprised with the iron plate,
The radiation shielding wall according to claim 1 or 2. A construction method of a radiation shielding wall filled with a shielding material between a pair of plate members installed facing each other,
A plate member installation step of installing the pair of plate members opposite to each other;
A shielding material filling step of filling the shielding material between the pair of plate members from a first opening provided at one upper portion of the pair of plate members;
A first opening closing step of closing the first opening;
A construction method for radiation shielding walls. A dismantling method of a radiation shielding wall filled with a shielding material between a pair of plate members installed facing each other,
A shielding material discharging step of discharging the shielding material from a second opening provided at one lower portion of the pair of plate members;
A plate member removal step of removing the pair of plate members;
A method of dismantling a radiation shielding wall.

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