JP5545788B1 - Radiation shielding container, radiation shielding box, and method for containing radioactive waste - Google Patents

Abstract

An object of the present invention is to solve the problems of conventional radioactive waste storage technology, that is, to shield radiation accurately, to install storage equipment in a short period of time and at low cost, and to shield it. The aim is to provide radioactive waste storage technology that reduces the weight of materials.
A radiation shielding box according to the present invention forms a radiation shielding container for containing radioactive waste by combining two or more. The radiation shielding box is composed of a bottom plate and a plurality of wall plates, and has a shape capable of self-supporting. Inside the space surrounded by the bottom plate and the plurality of wall plates, a filling space for containing a filler is formed, and a reinforcing material for connecting the wall plates is provided between a pair of opposing wall plates among the plurality of wall plates. ing.
[Selection] Figure 1

Description

  The present invention relates to storage of radiation contaminated waste such as soil, vegetation, and debris (hereinafter collectively referred to as “radioactive waste”), and more specifically. Relates to a radiation shielding box for storing radioactive waste and a method for containing the radioactive waste.

  Japan is known as an earthquake-prone country, and in recent years, major earthquakes such as the Tohoku-Pacific Ocean Earthquake, the Hyogoken-Nanbu Earthquake, and the Niigata-ken Chuetsu Earthquake have occurred and have suffered enormous damage each time. In particular, the Great East Japan Earthquake suffered immeasurable damage from the tsunami, and the Fukushima nuclear power plant reactor was damaged. Radioactive materials released in large quantities in the nuclear accident were advected and diffused over a wide area in the form of aerosols, etc., and as a result of falling and depositing on the ground due to rainfall, the living environment of local residents was greatly affected.

  Against this background, the Special Measures Act against Radioactive Substance Contamination has been implemented, and so-called decontamination measures such as the removal of soil, vegetation, debris, etc., on which radioactive substances have been deposited, have been earnestly advanced. Although decontamination measures are indispensable to reduce the risk of local exposure, this decontamination measure has many challenges. In particular, it is an extremely important issue that a disposal place for temporary storage, intermediate storage and final disposal of waste contaminated with radioactive materials has not yet been secured. This is because securing a disposal place for decontamination waste generated by decontamination becomes a bottleneck, and decontamination measures are not proceeding as expected.

  Decontamination measures have been continued while even temporary storage has not been secured sufficiently. As a result, radioactive waste such as soil, vegetation, and debris was provisionally secured, for example, in private gardens. It is stored in a temporary storage area (hereinafter referred to as “provisional temporary storage area”).

  Radioactive waste emits radiation, and it is necessary to shield the radiation even when stored in a temporary storage area. The above-mentioned Law on Special Measures against Radioactive Substance Contamination is aimed at promptly reducing the impact on human health and the living environment. Mandatory storage and disposal. For example, radioactive wastes are stored in different ways depending on their radioactivity concentration, and those with a medium radioactivity concentration (above 8,000 Bq / kg and less than 100,000 Bq / kg) are stored at a controlled disposal site. Stipulate that those with high radioactivity concentration (over 100,000 Bq / kg) should be stored in intermediate storage facilities (closed-type disposal sites equipped with peripheral partitioning facilities with sufficient water tightness, strength and durability) doing. As described above, radioactive waste should be carefully stored, and it is necessary to take some measures to shield radiation even when stored in a temporary storage area.

  By the way, radiation is emitted by the decay of nuclei in radioactive materials such as cesium. When radiation radiated from a radioactive material collides with an “object” including the human body, it blows off electrons of atoms and molecules in the material and ionizes them. At this time, the energy provided for the radiation is consumed, and when all the energy is consumed, the radiation remains in the collided object, and passes through the object if the energy remains. That is, if the radiation has the same energy, the object having more electrons is more likely to stay, and conversely, the object having fewer electrons is more likely to be transmitted. Here, the mass of the substance is proportional to the number of protons and neutrons in the atom, and considering that the number of protons and the number of electrons are equal, the larger the mass of the substance, the easier it is to stop radiation, that is, the easier it is to shield. It becomes.

  From the above, in order to shield radiation from radioactive waste, it is conceivable to cover the periphery with a heavy shield. Until now, various methods of covering radioactive waste with shielding have been proposed. For example, Patent Document 1 proposes storing radioactive waste in a “storage box” made of precast concrete. This storage box is composed of a box-shaped block which is a main body and a lid panel, and a water shielding sheet is laid on the inner surface of the box-shaped block.

JP 2013-068601 A

  As mentioned above, in the present situation where temporary storage is not secured, radioactive waste generated by decontamination measures in urban areas is stored in temporary storage. At this time, the radioactive waste is generally stored and stored in a bag-like container called a ton pack (or flexible container pack) having a capacity of about 1 m 3. The radioactive waste stored in the ton pack is stored as a temporary temporary storage in a nearby yard such as a private garden.

  According to the “Guidelines for Storage of Removed Soil” by the Ministry of the Environment, the side and top of radioactive waste are covered with a shielding material to shield the radiation. For example, when covering 30 cm of soil, radiation is reduced to 1/40. It is shown that. However, when stored in a temporary temporary storage, there are many cases where the ton pack is only accommodated in a plastic drum can due to the limitation of the yard size. In an extreme case, there is even a case where radioactive waste packed in a ton pack is left unattended in a temporary temporary storage area.

  According to the method proposed by Patent Document 1, a considerable shielding effect can be expected from covering radioactive waste with concrete, and storage facilities can be installed in a short period of time, and the movement and removal of storage facilities are also compared. There is an advantage that it can be easily done. However, considering that a considerable weight is required to shield radiation, a concrete storage box is inevitably heavy. Such a storage box is expensive to manufacture and requires various heavy machinery for transportation and installation, which increases construction costs. In particular, in order to install a heavy storage box, a crane or other lifting machine is required. However, it is conceivable that a space for placing the lifting machine cannot be secured in a narrow yard such as a private garden.

  The object of the present invention is to solve the problems of conventional radioactive waste storage technology, that is, to accurately shield radiation, install storage equipment in a short period of time and at low cost, and reduce the weight of the shield. It is to provide radioactive waste storage technology.

  The present invention was made by paying attention to the point of using a hollow box as a shield to shield radiation, and completing a shield as a heavy object in the field, based on an unprecedented idea It is an invention made.

"Radiation shielding container" of the present invention, all SANYO storing housing the radioactive waste, a wall that combine radiation shielding box making bodies of 2 or more, the accommodation space surrounded by a plane in the wall It is provided. The upper surface of the radiation shielding box constituting the wall is a full opening, and the inside of the radiation shielding box is filled with a filler. The accommodation space is an open space where radioactive waste can be removably accommodated. The radiation shielding box is composed of a bottom plate and a plurality of wall plates, and has a shape capable of self-supporting. Further, the radiation shielding box is formed with a filling space for filling the inside surrounded by the bottom plate and the plurality of wall plates, and the wall plates are connected between a pair of opposing wall plates among the plurality of wall plates. Reinforcing material is provided. Due to the effect of the reinforcing material, the radiation shielding box can be prevented from sticking out even when a filler such as earth and sand is put into the filling space.

The “radiation shielding box” of the present invention forms a “radiation shielding container” for storing and storing radioactive waste by combining two or more. The radiation shielding box is composed of a bottom plate and a plurality of wall plates, and has a shape capable of self-supporting. Inside the space surrounded by the bottom plate and the plurality of wall plates, a filling space for containing a filler is formed, and a reinforcing material for connecting the wall plates is provided between a pair of opposing wall plates among the plurality of wall plates. ing. Due to the effect of the reinforcing material, the radiation shielding box can be prevented from sticking out even when a filler such as earth and sand is put into the filling space. Further, the bottom plate of the radiation shielding box is detachably attached to the wall, and the bottom plate can be removed even when the filler is in the filling space. Therefore, when removing the radiation shielding container, the filler can be easily removed simply by pulling up the radiation shielding box.

  The radiation shielding box of the present invention may be provided with a locking portion for joining with another radiation shielding box. By fitting this locking portion with a locking portion of another radiation shielding box, the connection with the other radiation shielding box becomes strong, and radiation can be shielded more reliably.

The radioactive waste accommodation method of the present invention is a method including a box installation step, a container formation step, a containment step , and a step of taking out the radioactive waste . In the box installation process, two or more radiation shielding boxes are installed. This radiation shielding box is composed of a bottom plate and a plurality of wall plates, and has a shape capable of self-supporting. In the container forming process, two or more radiation shielding boxes are combined, and the filling material is filled from the upper surface of the radiation shielding box that is fully opened in the filling space surrounded by the bottom plate and the plurality of wall plates constituting the radiation shielding box. And forming a radiation shielding container having a housing space surrounded by the radiation shielding box in a plane . In the storage step, radioactive waste is stored in the storage space of the radiation shielding container. In the step of taking out the radioactive waste, after storing the radioactive waste for a predetermined period (for example, until the destination of the radioactive waste is determined), the radioactive waste is taken out from the upper part of the accommodation space. In addition, a reinforcing material is provided between a pair of facing wall plates among the plurality of wall plates constituting the radiation shielding box to prevent the radiation shielding box from protruding when the filling material is put into the filling space. can do.

The radioactive waste accommodation method of the present invention may be a method including a removal step of removing the radiation shielding box. In this case, in the container forming step, two or more radiation shielding boxes are combined, and the upper surface of the radiation shielding box that is fully opened in the filling space surrounded by the bottom plate and the plurality of wall plates constituting the radiation shielding box. A filler is put in to form a radiation shielding container. In the removal step, the bottom plate is removed with the filler in the filling space, and the radiation shielding box is pulled up to remove the filler from the filling space.

  The method for containing radioactive waste according to the present invention may be a method for containing radioactive waste by a radiation shielding container using a radiation shielding box having a locking portion. This locking portion is for joining with another radiation shielding box. In this case, the container forming step is performed by fitting the locking portion of the radiation shielding box with the locking portion of the other radiation shielding box. Combine radiation shielding boxes by combining them.

The radiation shielding box and the radioactive waste accommodation method of the present invention have the following effects.
(1) Since the radiation shielding box is hollow, it is lightweight and very easy to transport and install. In particular, since a lifting machine is not required at the time of installation, the radiation shielding box can be installed without difficulty even in a narrow temporary storage place, and can be widely used in various places.
(2) It is lighter than conventional concrete products, that is, production costs and transportation / installation costs are significantly reduced.
(3) Since sand or the like can be used as the filler to be filled in the filling space, this can be implemented easily and at low cost.
(4) Since the reinforcing material for connecting the pair of wall plates is provided in the filling space, it is possible to prevent so-called “protruding” in which a part of the radiation shielding box is expanded by the filling material.
(5) Since the radiation shielding box has a locking portion for joining with other radiation shielding boxes, the joining with the other radiation shielding boxes becomes stronger and the radiation is more reliably shielded. can do.
(6) By detachably attaching the bottom plate of the radiation shielding box, the filler can be easily removed simply by pulling up the radiation shielding box when removing the radiation shielding container.

The perspective view which shows the radiation shielding box of this invention. (A) is explanatory drawing which shows the condition which combines the several radiation shielding box of this invention, (b) is explanatory drawing which shows the condition which throws a filler into filling space, (c) is radioactive in a radiation shielding container. Explanatory drawing which shows the condition which accommodates a waste, (d) is explanatory drawing which shows the condition which covers a radioactive waste with a cover. The perspective view which shows the detachable bottom plate. (A) is a top view explaining the key-type latching | locking part provided in the radiation shielding box, (b) is a top view explaining the uneven | corrugated-type latching | locking part. The flowchart which shows the main flows of the accommodation method of the radioactive waste of this invention.

  An example of an embodiment of the radiation shielding box and radioactive waste storage method of the present invention will be described with reference to the drawings.

1. Overall Overview FIG. 1 is a perspective view showing a radiation shielding box 100 of the present invention. As shown in this figure, the radiation shielding box 100 has a shape capable of maintaining an upright posture (hereinafter referred to as “self-standing”) without any other support, and is a hollow structure formed of a plate-like member. It has become.

  When two or more radiation shielding boxes 100 are combined, a radiation shielding container 300 capable of containing the radioactive waste 200 is formed. FIG. 2 is an explanatory diagram showing a process until the radiation shielding container 300 is formed using the radiation shielding box 100 of the present invention and the radioactive waste 200 is accommodated in the radiation shielding container 300.

As shown in FIG. 2, first, two or more radiation shielding boxes 100 are combined ((a) in FIG. 2), and in that state, a filler 400 such as earth and sand is placed in a filling space which is a hollow portion of the radiation shielding box 100. (B in FIG. 2). The radioactive waste 200 packed in a ton pack or the like is accommodated in the radiation shielding container 300 formed by the steps up to here ((c) in FIG. 2 ) , and covered with a lid 500 from the top (in FIG. 2). (D)), storing the radioactive waste 200 for a predetermined period.

  Hereinafter, examples of embodiments of the present invention will be specifically described.

2. Radiation shielding box The radiation shielding box 100 will be described in detail with reference to FIG. The radiation shielding box 100 is composed of a plurality of plate-like members as described above, and is composed of a wall plate 101, a bottom plate 102, and side plates 103 in this figure. A hollow filling space 104 is formed in the interior surrounded by the wall plate 101 and the bottom plate 102. A plurality of reinforcing materials 105 are provided in the filling space 104 to connect the outer wall plate 101a and the inner wall plate 101b.

(Independent shape)
The radiation shielding box 100 of the present invention has a shape that can stand by itself. The radiation shielding box 100 shown in FIG. 1 has an L shape in a plan view, and does not fall over without any other support. Of course, the radiation shielding box 100 is not limited to an L shape in plan view, and various shapes can be adopted as long as the shape can be self-supporting.

(Wall plate and bottom plate)
It is desirable that the wall plate 101, the bottom plate 102, and the side plate 103 constituting the radiation shielding box 100 be lightweight members. This is for reducing the weight of the radiation shielding box 100 and facilitating transportation and installation. However, the wall plate 101 is required to have enough strength to withstand the lateral pressure caused by the filler 400 in the filling space 104. Examples of the wall plate 101, the bottom plate 102, and the side plate 103 include thin steel plates, synthetic resin plates, wooden plates, and plywood. Further, a product called Plapearl (registered trademark) can be used for the wall plate 101, the bottom plate 102, and the side plate 103.

  The radiation shielding box 100 shown in FIG. 1 is L-shaped in plan view, and includes four wall plates 101 (two outer wall plates 101a and two inner wall plates 101b), two bottom plates 102, and two side plates 103. It is configured. The radiation shielding box 100 is formed by combining these plate materials by a conventionally used technique. For example, the radiation shielding box 100 is formed by connecting the plate materials using bolts, screws, or the like, or joining the plate materials by welding, welding, thermal fusion, or the like, or combining the plate materials by various other methods. The When plastic pearl is used as the plate material, the plate materials can be connected by a dedicated joint member (P joint). In addition, although it demonstrated that the four wall boards 101 were used, the L-shaped wall board 101 can be created and the radiation shielding box 100 of FIG. Alternatively, a member in which the wall plate 101 and the bottom plate 102 are integrated, or a member in which the wall plate 101 and the side plate 103 are integrated can be combined. Alternatively, the radiation shielding box 100 may be integrally formed as one member using a mother die.

(Filling space and reinforcement)
Inside the wall plate 101, the bottom plate 102, and the side plate 103, a filling space 104 in which the filler 400 can be filled is formed. The dimensions of the filling space 104 can be designed as appropriate. For example, when earth and sand are used as the filler 400, the width of the filling space 104 can be about 30 cm. According to the cover of 30 cm indicated by the Ministry of the Environment, radiation is reduced to 1/40, so it is considered that earth and sand (filler 400) filled with a width of 30 cm also exhibits the same effect. In addition, when making earth and sand into the filler 400, it is desirable to employ the earth and sand not receiving radiation. In addition to earth and sand, various materials can be used as the filler 400. However, considering the radiation shielding effect, it is desirable to select a material having a considerable unit volume weight.

  When the filling material 400 is filled in the filling space 104, it is considered that a side pressure is applied to the wall plate 101 and the wall plate 101 protrudes. This protrusion may cause a gap between the plate members, resulting in a reduction in radiation shielding effect. Therefore, a reinforcing material 105 is provided in the filling space 104. The reinforcing member 105 connects a pair of opposing wall plates 101. In FIG. 1, the opposing outer wall plate 101a and the inner wall plate 101b are connected. Therefore, the reinforcing material 105 is fixed to each wall plate 101. As a result of the reinforcing material 105 connecting the outer wall plate 101 a and the inner wall plate 101 b, the wall plate 101 can be prevented from protruding even when a lateral pressure is applied by the filler 400.

  As a method for fixing the reinforcing material 105 to the wall plate 101, conventionally used methods such as welding, adhesion, thermal fusion, and joining with bolts or screws can be used. Although the reinforcing material 105 can be fixed to the bottom plate 102, as will be described later, when the bottom plate 102 and the wall plate 101 are detachably attached, the reinforcing material 105 is not fixed to the bottom plate 102.

  As the reinforcing member 105, a separator can be used in addition to the plate-like member shown in FIG. This separator is used in a formwork for placing concrete, and penetrates and fixes the outer wall plate 101a and the inner wall plate 101b, and connects both. The dimensions and arrangement intervals of the separators to be installed are appropriately designed according to the shape and size of the radiation shielding box 100.

(Removable bottom plate)
The bottom plate 102 is attached to the wall plate 101 and the side plate 103, but may be detachable. FIG. 3 is a perspective view showing the detachable bottom plate 102. As shown in this figure, the bottom plate 102 is provided with a folded portion, the folded portion is applied to the wall plate 101 and the side plate 103, and the bottom plate 102 is attached with bolts, screws, or other bonding materials. As a result, even when the filler 400 is packed in the filling space 104 of the radiation shielding box 100, the bolts and the like can be removed from the side. That is, when the radiation shielding box 100 is removed, the wall plate 101 and the like can be pulled up after separating the bottom plate 102 and the wall plate 101 and the like, and the filler 400 can be easily removed from the radiation shielding box 100. That is why. Of course, the method of attaching the bottom plate 102 so as to be detachable is not limited to the method of FIG. 3 as long as the bottom plate 102 can be removed in a state where the filler 400 is packed.

(Radiation shielding container)
A radiation shielding container 300 is obtained by assembling two or more radiation shielding boxes 100. As shown in FIG. 2, a storage space is formed inside the radiation shielding container 300, and the radioactive waste 200 is stored in the storage space. The radiation shielding box 100 filled with the filler 400 has a considerable weight, and can appropriately shield the radiation from the stored radioactive waste 200. Moreover, as shown in FIG.2 (d), after accommodating the radioactive waste 200, the cover 500 can also be installed in the upper part. The lid 500 may be plate-shaped or sheet-shaped. In addition, it will become more suitable from the surface of the shielding effect of a radiation if the shielding sheet is affixed on the back surface (surface which approaches the radioactive waste 200) of the lid | cover 500. FIG.

  The radiation shielding container 300 can be assembled using the locking portion 106 provided in the radiation shielding box 100. FIGS. 4A and 4B are plan views for explaining the locking portion 106 provided in the radiation shielding box 100. FIG. 4A is a view in which the locking portion 106 is a key shape, and FIG. FIG. As shown in this figure, when the locking part 106 is provided in each radiation shielding box 100, two or more radiation shielding boxes 100 are assembled by fitting both locking parts 106 to be joined. . As a result, the radiation shielding box 100 can be more firmly bonded and can more appropriately shield the radiation from the radioactive waste 200.

  In FIG. 4A, a part of the radiation shielding box 100 is lost to provide a key-shaped (step-shaped) locking portion 106 at the end. A part of the other radiation shielding box 100 to be joined is fitted into the lost space, and a part of itself is fitted to the missing part of the other radiation shielding box 100 to be joined. The radiation shielding box 100 is combined. In FIG. 4B, one end of the radiation shielding box 100 is formed in a convex shape, and the other end is formed in a concave shape to provide a locking portion 106. In this case, the convex locking part 106 formed on one radiation shielding box 100 to be joined is fitted to the concave locking part 106 formed on the other radiation shielding box 100, so that both The radiation shielding box 100 is combined.

3. Radioactive waste accommodation method With reference to FIG. 5, the radioactive waste accommodation method of the present invention will be described. As shown in FIG. 5, this method is roughly divided into “accommodation step”, “temporary placement step”, and “removal step”, but the present invention mainly constitutes “accommodation step”. For convenience, the case where the radioactive waste 200 is stored in a temporary temporary storage place will be described here. The method described here is a method using the radiation shielding box 100 described in “2. Radiation shielding box”, and the contents already described are omitted here to avoid duplication.

  First, two or more radiation shielding boxes 100 are carried into the planned provisional temporary storage place (Step 10). The radiation shielding box 100 is manufactured in advance at a factory or the like, and is transported from there to a temporary temporary storage place. The carried-in radiation shielding box 100 is installed at a predetermined position (Step 20), and the radiation shielding box 100 is assembled to have a predetermined shape by using, for example, the locking portion 106 (Step 30). Depending on the shape of the radiation shielding box 100, three or more radiation shielding boxes 100 may be assembled.

  The filler 400 is put into the two or more assembled radiation shielding boxes 100 (Step 40). The filler 400 is filled in a filling space 104 provided in the radiation shielding box 100. As a result, the radiation shielding box 100 becomes a desired heavy object. The radiation shielding container 300 is formed through the steps up to here.

  An accommodation space is formed inside the radiation shielding container 300, and the radioactive waste 200 is accommodated in this accommodation space (Step 50). As described above, after the radioactive waste 200 is stored, the lid 500 can be installed on the top (Step 60). If the radioactive waste 200 can be accommodated, this state is maintained for a predetermined period, and the radioactive waste 200 is stored (Step 70).

  If temporary storage or intermediate storage is secured and the destination of the stored radioactive waste 200 is determined, the radioactive waste 200 is taken out from the radiation shielding container 300 and carried out to the destination (Step 80). Thereafter, the radiation shielding container 300 is removed. If the bottom plate 102 is detachably attached at this time, it is first removed from the bottom plate 102 (Step 90). Then, the radiation shielding box 100 separated from the bottom plate 102 is pulled up, and the filler 400 in the accommodation space 104 is removed (Step 100). Finally, the removed filler 400 and the removed bottom plate 102 are carried out from the temporary temporary storage place (Step 110).

  The radiation shielding box and radioactive waste containment method of the present invention are not limited to use for radioactive waste discharged after decontamination, but materials and parts that are disposed of after appropriate use at a nuclear power plant. It can also be used for temporary storage. The invention of the present application is not only industrially applicable, but is expected to make a significant contribution to society, considering the provision of a suitable solution for the radioactive waste storage location, which is now an urgent issue. It is an invention to obtain.

DESCRIPTION OF SYMBOLS 100 Radiation shielding box 101 Wall plate (of radiation shielding box) 101a Outer wall plate (out of wall plate) 101b Inner wall plate (out of wall plate) 102 Bottom plate (of radiation shielding box) 103 (Radiation shielding box) Side plate 104 Filling space (of radiation shielding box) 105 Reinforcing material (of radiation shielding box) 106 Locking portion (of radiation shielding box) 200 Radioactive waste 300 Radiation shielding container 400 Filling material 500 Lid

Claims (6)

A radiation shield container to store housing the radioactive waste,
A wall body in which two or more radiation shielding boxes are combined, and a storage space surrounded by the wall body in a plane,
The upper surface of the radiation shielding box constituting the wall body is a full opening, and the inside of the radiation shielding box is filled with a filler,
The storage space is a space in which the radioactive waste can be taken out and stored.
The radiation shielding box is a self-supporting shape, and includes a bottom plate and a plurality of wall plates,
Further, the radiation shielding box body is in the interior surrounded by the plurality of wall plate and the bottom plate, the filling space for containing the filling material is formed, among the plurality of wall plates that form the filling space A radiation shielding container , wherein a reinforcing member for connecting the pair of wall plates is provided between the pair of wall plates facing each other. By combining two or more, to form a radiation shielding container to store housing the radioactive waste, a radiation shielding box making bodies,
Consists of a shape that can stand on its own by a bottom plate and multiple wall plates,
In the interior surrounded by the bottom plate and the plurality of wall plates, a filling space for containing a filler is formed,
A reinforcing material for connecting the pair of wall plates is provided between the pair of wall plates facing each other among the plurality of wall plates forming the filling space,
The bottom plate is detachably attached to the plurality of wall bodies, and the bottom plate can be removed in a state where the filler is contained in the filling space. A locking portion for joining with another radiation shielding box is further provided,
3. The radiation shielding container is formed by fitting the locking portion with a locking portion of another radiation shielding box to join the other radiation shielding box. Radiation shielding box. The radiation shielding container, a method to store housing the radioactive waste,
A box installation step of installing two or more radiation shielding boxes configured in a shape capable of being self-supported by a bottom plate and a plurality of wall plates;
A combination of the two or more radiation shielding boxes and a filling material from the upper surface of the radiation shielding box that is fully opened in a filling space surrounded by the bottom plate and the plurality of wall plates constituting the radiation shielding box. A container forming step of forming a radiation shielding container having an accommodation space surrounded by the radiation shielding box in a plane ,
A housing step of housing radioactive waste in the housing space ;
After storing the radioactive waste, removing the radioactive waste from the accommodation space , and
Reinforcing material is provided between a pair of wall plates facing each other among the plurality of wall plates forming the filling space, and the radioactive waste can be prevented from protruding when filled with the filling material. Containment method. A method of storing and housing the radioactive waste,
A box installation step of installing two or more radiation shielding boxes configured in a shape capable of being self-supported by a bottom plate and a plurality of wall plates;
A container forming step of combining the two or more radiation shielding boxes and forming a radiation shielding container by putting a filler in a filling space surrounded by the bottom plate and the plurality of wall plates constituting the radiation shielding box When,
A housing step of housing radioactive waste in the radiation shielding container;
A removal step of removing the radiation shielding box,
Reinforcing material is provided between a pair of opposing wall plates among the plurality of wall plates forming the filling space, preventing protrusion when filled with the filling material,
The removing step is performed by removing the bottom plate with the filler in the filling space, and pulling up the radiation shielding box to remove the filler from the filling space. Waste storage method. The radiation shielding box comprises a locking portion for joining with another radiation shielding box,
The container forming step is characterized by combining two or more radiation shielding boxes by fitting the locking portion of the radiation shielding box to a locking portion of another radiation shielding box. The method for containing radioactive waste according to claim 4 or 5.

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