JP7257280B2 - Radioactive waste storage method, radioactive waste storage container, and radioactive waste storage container assembly unit - Google Patents

Description

The present disclosure relates to a radioactive waste storage method, a radioactive waste storage container, and a radioactive waste storage container assembly unit.

In a nuclear facility, for example, waste generated during replacement work of various devices or decommissioning is dismantled and stored in storage containers. Since such waste has a high radiation dose, a storage container with a large plate thickness that has a shielding function is required. As such a radioactive waste storage container, for example, there is one described in Cited Document 1 below.

JP 2014-185919 A

As described above, the radioactive waste storage container has a large plate thickness due to the need to secure the shielding function, and becomes a heavy object. As a result, the manufacturing cost of the radioactive waste container increases. In addition, when a heavy radioactive waste storage container is stored in a storage facility, it is necessary to secure a place that takes into consideration the load capacity, and a large storage space with high durability is required. Furthermore, the radioactive waste storage container containing the radioactive waste needs to be transported from the nuclear facility to the disposal facility, which increases the transportation cost of the heavy radioactive waste storage container.

The present disclosure is intended to solve the above-described problems, and aims to provide a radioactive waste storage method, a radioactive waste storage container, and a radioactive waste storage container assembly unit for reducing the weight of a radioactive waste storage container. and

A radioactive waste storage method of the present disclosure for achieving the above object comprises the steps of storing radioactive waste in a multi-structured storage container, and dismantling the outer container.

Further, the radioactive waste storage container of the present disclosure includes an inner storage container in which radioactive waste is stored in the inner storage container body and the inner storage container lid is welded and sealed, and the inner storage container is attached to the outer storage container body. an outer storage container that is housed and hermetically sealed by fastening the outer storage container lid.

In addition, the radioactive waste storage container of the present disclosure includes an inner storage container that stores radioactive waste, and an outer side that covers the inner storage container by fastening a plurality of panel members arranged outside the inner storage container. a storage container;

Further, the radioactive waste storage container assembly unit of the present disclosure is an outer storage container assembly unit that stores an inner storage container in which radioactive waste is stored, and includes a plurality of metal panel members having a predetermined thickness. , a plurality of elongated members attached around the panel member; and a block member connecting longitudinal ends of the plurality of elongated members.

According to the radioactive waste storage method, the radioactive waste storage container, and the radioactive waste storage container assembly unit of the present disclosure, the weight and size of the radioactive waste storage container can be reduced.

FIG. 1 is a longitudinal sectional view showing the radioactive waste storage container of the first embodiment. FIG. 2 is a longitudinal sectional view of the first container. FIG. 3 is a longitudinal sectional view of the second container. FIG. 4 is a schematic diagram for explaining a storage method for the radioactive waste container. FIG. 5 is a schematic diagram for explaining how to use the radioactive waste storage container. FIG. 6 is a schematic diagram for explaining a dismantling method of the radioactive waste storage container. FIG. 7 is a longitudinal sectional view showing the radioactive waste storage container of the second embodiment. FIG. 8 is a perspective view showing the second container. FIG. 9 is an exploded perspective view showing the second container. FIG. 10 is a plan view of the second storage container before assembly. FIG. 11 is a plan view after assembly showing the second storage container.

Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be noted that the present disclosure is not limited by this embodiment, and when there are a plurality of embodiments, the present disclosure also includes a combination of each embodiment. In addition, components in the embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range.

[First embodiment]
1 is a longitudinal sectional view showing the radioactive waste container of the first embodiment, FIG. 2 is a longitudinal sectional view of the first container, and FIG. 3 is a longitudinal sectional view of the second container.

[Radioactive waste container]
In the first embodiment, as shown in FIG. 1, the radioactive waste storage container 10 includes a first storage container 11 as an inner storage container and second, third, fourth and fifth storage containers as outer storage containers. and containers 12 , 13 , 14 , 15 . Each storage container 11, 12, 13, 14, 15 is made of a metal member, for example, made of iron or stainless steel.

As shown in FIG. 2 , the first storage container 11 has a storage container body (inner storage container body) 21 and a lid (inner storage container lid) 22 . The storage container main body 21 has a cubic or rectangular parallelepiped shape, and is provided with a storage space 23 capable of storing the radioactive waste 200 therein. The lid 22 has a rectangular plate shape and is fixed to the storage container main body 21 so as to seal the storage space 23 (radioactive waste 200). In the first embodiment, the lid 22 is fixed to the storage container body 21 by welding (welded portion 24).

As shown in FIG. 3 , the second container 12 has a container body (outer container body) 31 and a lid (outer container lid) 32 . The storage container main body 31 has a cubic or rectangular parallelepiped shape, and is provided with a storage space 33 capable of storing the first storage container 11 therein. The lid 32 has a square plate shape and is fixed to the storage container main body 31 so as to seal the storage space 33 (the first storage container 11). In the first embodiment, the lid 32 is fastened to the container main body 31 with a plurality of bolts 34 and is detachable by loosening the plurality of bolts 34 .

As shown in FIG. 1, the third, fourth, and fifth storage containers 13, 14, and 15 also have storage container main bodies (outer storage container main bodies) 41, 51, and 61, similar to the second storage container 12. , lids (outer container lids) 42 , 52 , 62 . The storage container bodies 41, 51, 61 are provided with storage spaces 43, 53, 63, and the lids 42, 52, 62 are fastened to the storage container bodies 41, 51, 61 with a plurality of bolts (not shown). .

Therefore, the radioactive waste 200 is stored in the first storage container 11, the first storage container 11 is stored in the second storage container 12, the second storage container 12 is stored in the third storage container 13, and the The third storage container 13 is stored in the fourth storage container 14 , and the fourth storage container 14 is stored in the fifth storage container 15 . At this time, the gaps between the outer surfaces and the inner surfaces of the first, second, third, fourth and fifth storage containers 11, 12, 13, 14 and 15 are , 15 is set smaller than the thickness of the wall.

The wall and bottom thicknesses of the storage container main bodies 21, 31, 41, 51, 61 and the thicknesses of the lids 22, 32, 42, 52, 62 may be the same, or may be the same. It may be made thicker or thinner as it goes. Further, the shape of each storage container 11, 12, 13, 14, 15 is not limited to a cubic shape or rectangular parallelepiped shape, but may be a polyhedral shape, a cylindrical shape, or the like.

In addition, in the first embodiment, the four second, third, fourth, and fifth storage containers 12, 13, 14, and 15 are provided as outer storage containers, but the number is not limited. . That is, since the first storage container 11 stores the radioactive waste 200 inside, the number of the outer storage containers to be prepared and the number of the outer storage containers to be used are appropriately adjusted according to the radiation dose of the radioactive waste 200. You can set it.

[How to store radioactive waste]
Here, a method for storing the radioactive waste 200 will be described. FIG. 4 is a schematic diagram for explaining the storage method of the radioactive waste storage container, FIG. 5 is a schematic diagram for explaining the usage method of the radioactive waste storage container, and FIG. It is the schematic for demonstrating the dismantling method.

The radioactive waste storage method of the first embodiment comprises a step of storing radioactive waste 200 in a multi-layered radioactive waste storage container 10, and a multi-layered radioactive waste storage container according to the dose of the radioactive waste 200. and dismantling the outer storage containers 12 , 13 , 14 , 15 in 10 .

In this case, the containers 12 , 13 , 14 and 15 are dismantled according to the radiation dose of the radioactive waste 200 . Specifically, the timing for dismantling the storage containers 12 , 13 , 14 , 15 is set according to the half-life of the radioactive waste 200 . Also, the timing for dismantling the storage containers 12, 13, 14, and 15 is set according to the radiation dose when the radioactive waste 200 is stored in the first storage container 11. FIG. Moreover, the storage containers 12, 13, 14, and 15 are dismantled according to the radiation dose when the radioactive waste is transported to an external facility. Then, another first storage container 11 or storage containers 12, 13, 14 are stored in the dismantled storage containers 12, 13, 14, 15 for reuse.

Here, the dose is the intensity of radiation in the radioactive waste 200 . The half-life is the time it takes for half of the radioactive isotopes in the radioactive waste 200 to change into different nuclides due to radioactive decay.

The storage method and usage method of the radioactive waste storage container will be specifically described below. FIG. 4 is a schematic diagram for explaining the storage method of the radioactive waste storage container, FIG. 5 is a schematic diagram for explaining the usage method of the radioactive waste storage container, and FIG. It is the schematic for demonstrating the dismantling method.

As shown in FIG. 4, at time A, the radioactive waste 200 is stored in the first storage container 11, the first storage container 11 is stored in the second storage container 12, and the second storage container 12 is stored in the third storage container. The third storage container 13 is stored in the fourth storage container 14 , and the fourth storage container 14 is stored in the fifth storage container 15 . At this time, the timing for dismantling each storage container 12 , 13 , 14 , 15 is set according to the radiation dose when the radioactive waste 200 is stored in the first storage container 11 .

For example, the predominant radionuclide in radioactive waste 200 is Cobalt-60. Since the half-life of cobalt-60 is about 5 years, each storage container 12, 13, 14, 15 is dismantled in order every 5 years. That is, when the radioactive waste 200 is stored in the radioactive waste storage container 10 at time A, the fifth storage container 15 is dismantled at time B five years after time A, and at time C ten years after time A At time D, 15 years after time A, the third storage container 13 is dismantled, and at time E, 20 years after time A, second storage container 12 is dismantled. to dismantle

Also, at time A, when the radioactive waste 200 is stored in the radioactive waste storage container 10, the radiation dose of the radioactive waste storage container 10 is measured by a dose measuring instrument, and each storage container 12, You may set the dismantling time of 13, 14, and 15. Then, each storage container 12, 13, 14, 15 is dismantled according to the set timing.

Furthermore, when the radioactive waste 200 stored in the nuclear reactor facility is transported to the interim storage facility or final disposal facility, the storage containers 12, 13, 14, 15 are dismantled according to the radiation dose at that time. For example, when ten years have passed since the radioactive waste 200 was stored in the radioactive waste storage container 10, the storage containers 14 and 15 are dismantled and transported.

Further, as shown in FIG. 5, when the storage containers 12, 13, 14, and 15 are dismantled every five years from time A to time E at the storage position G1, as described above, from time B to time E It becomes possible to reuse the storage containers 12, 13, 14, and 15 at the time of dismantling every five years. That is, when each storage container 12, 13, 14, 15 is dismantled at the storage position G2 every five years from time B to time F, the fifth storage container 15 dismantled at the storage position G1 at time B can be reused. Also, when the storage containers 12, 13, 14, and 15 are dismantled at the storage position G3 every five years from time D to time H, at time D, the storage containers 12, 13, 14, and 15 dismantled at the storage position G1 are disassembled. 13 and 14 can be reused, and the fifth storage container 15 dismantled at the storage position G2 can be reused. The storage positions G1, G2, and G3 may be different storage locations in the same nuclear facility, or may be storage locations in different nuclear facilities.

Here, a specific dismantling method of the radioactive waste storage container 10 will be described. As shown in FIG. 6, the case of dismantling the fifth storage container 15 in the radioactive waste storage container 10 storing the radioactive waste 200 will be described.

The radioactive waste storage container 10 is positioned and fixed to the floor on which it is placed by a fixing device 70 . A shield member 71 is installed between the worker and the radioactive waste storage container 10 , and the worker first loosens the bolt 64 that fastens the lid 62 to the storage container body 61 using the fastening jig 72 . When the fastening of the lid 62 to the storage container body 61 is released, next, the operator operates a crane (not shown) to place a magnet 74 as a handling tool suspended from a hanging tool 73 on the lid 62 . do. Subsequently, the operator attracts the lid 62 with the magnet 74 , operates the crane, lifts the lid 62 via the magnet 74 with the hoist 73 , and moves. Finally, the operator operates a crane (not shown) to place the magnet 74 suspended by the hanging tool 73 on the fourth storage container 14 . Then, the worker attracts the fourth storage container 14 with the magnet 74 , operates the crane, lifts the fourth storage container 14 via the magnet 74 with the lifting tool 73 , and extracts it from the storage container main body 61 . Therefore, in the radioactive waste storage container 10 storing the radioactive waste 200, the fifth storage container 15 is dismantled, and the fourth storage container 14 becomes the outermost storage container.

Note that when the lid 62 is lifted by the magnet 74 by operating the crane, only the lid 62 can be lifted because a gap is provided between the lid 62 and the fourth storage container 14 . Further, when the lid 62 is lifted by the magnet 74 by operating the crane, the fourth container 14 is lifted together, placed on the floor and positioned and fixed by the fixing device 70, and then the lid 62 is lifted. You can lift only the

[Second embodiment]
7 is a longitudinal sectional view showing the radioactive waste storage container of the second embodiment, FIG. 8 is a perspective view showing the second storage container, and FIG. 9 is an exploded perspective view showing the second storage container. Members having the same functions as those of the above-described first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[Radioactive waste container]
In the second embodiment, as shown in FIG. 7, the radioactive waste storage container 100 includes a first storage container 11 as an inner storage container and second, third, fourth and fifth storage containers as outer storage containers. and containers 102 , 103 , 104 , 105 .

The first storage container 11 is similar to that of the first embodiment, and has a storage container body 21 and a lid 22, and is provided with a storage space 23 capable of storing radioactive waste 200 therein. The lid 22 has a rectangular plate shape and is fixed to the storage container main body 21 so as to seal the storage space 23 (radioactive waste 200). In the second embodiment, the lid 22 may be fixed to the storage container main body 21 by welding, or may be detachably fastened with bolts.

The second storage container 102 includes a plurality of panel members 111, a plurality of long members 112 attached around the panel members 111, and a block member 113 connecting the ends of the plurality of long members 112 in the longitudinal direction. have The panel member 111, the long member 112, and the block member 113 are made of metal members, for example, made of iron or stainless steel.

As shown in FIGS. 7 to 9, the second storage container 102 has a cubic or rectangular parallelepiped shape and is provided with a storage space 114 in which the first storage container 11 can be stored. The panel member 111 has a rectangular plate shape, and the four side portions 111 a are fitted into the groove portions 112 a of the long members 112 . The long members 112 attached to the four side portions 111a of the panel member 111 are connected by block members 113 at their ends in the longitudinal direction. In this case, the elongated member 112 and the block member 113 are fastened with bolts (not shown).

One panel member 111 , four long members 112 and four block members 113 form one surface of the second storage container 102 . By assembling the panel member 111, the long member 112, and the block member 113 in this manner, the second storage container 102 having the storage space 114 secured therein is assembled, and the first storage container 11 is installed in the storage space 114. It can be stored and sealed. In the first embodiment, the panel member 111, the long member 112, and the block member 113 are assembled into a box shape and fastened with a plurality of bolts to form the second container 102, and the plurality of bolts 34 are loosened. It can be dismantled by

As shown in FIG. 7, the third, fourth, and fifth storage containers 103, 104, and 105 also have panel members 121, 131, and 141 and elongated members 122, 132, 122, 132, 122, 132, 122, 132, 122, 132, 121, 121, 121, 121, 121, 121, 121, 122, 122, 122, 122, 122, 122, 122, 122, 122, 122, 122, 1F, 12F, 12F, 12F, 12F, 12F, 1F 1F, 142 and block members 123, 133, 143 are assembled into a box shape and fastened with a plurality of bolts, and storage spaces 124, 134, 144 are provided inside.

The assembly structure of the panel members 111, 121, 131, 141, the long members 112, 122, 132, 142 and the block members 113, 123, 133, 143 will be described in detail. 10 is a plan view of the second storage container before assembly, and FIG. 11 is a plan view of the second storage container after assembly.

As shown in FIG. 10, in the second storage container 102, the six panel members 111 all have the same rectangular plate shape. The 12 elongated members 112 are in the shape of a square bar, and are formed with two grooves 112a along the longitudinal direction and concave portions 112b at the ends in the longitudinal direction. The eight block members 113 have a cubic shape and are formed with three grooves 113a and projections 113b. As shown in FIGS. 10 and 11, the panel member 111 has four side portions 111a fitted into the groove portions 112a of the elongated member 112, and the block member 113 is attached to the end portion of the elongated member 112. As shown in FIGS. At this time, the convex portion 113b of the block member 113 is fitted into the concave portion 112b of the long member 112 and positioned. In this state, the long member 112 and the block member 113 are bolted together.

In the third storage container 103, the six panel members 121 all have the same rectangular plate shape, and the panel member 111 also has the same shape. The 12 elongated members 122 are bar-shaped and have two grooves 122a formed along the longitudinal direction and three recesses 122b formed at the ends in the longitudinal direction. Further, the elongated member 122 is formed with a stepped portion 122c that fits into the elongated member 112 along the longitudinal direction. The eight block members 123 have a cubic shape and are formed with grooves 123a and projections 123b. In addition, the block member 123 has a stepped portion 123c formed at a corner thereof to fit the block member 113. As shown in FIG. When assembling the third storage container 103 outside the second storage container 102 , the panel member 121 has the four side portions 121 a fitted into the groove portions 122 a of the elongated member 122 , and the block members 123 at the ends of the elongated member 122 . is installed. At this time, the stepped portion 122 c of the elongated member 122 fits into the elongated member 112 , and the stepped portion 123 c of the block member 123 fits into the block member 113 . Then, the convex portion 123b of the block member 123 is fitted into the concave portion 122b of the long member 122 and positioned. In this state, the long member 122 and the block member 123 are bolted together.

Therefore, as shown in FIG. 7, the radioactive waste 200 is stored in the first storage container 11, the first storage container 11 is stored in the second storage container 102, and the second storage container 102 is stored in the third storage container. The third storage container 103 is stored in the fourth storage container 104 , and the fourth storage container 104 is stored in the fifth storage container 105 . At this time, the gaps between the outer surfaces and the inner surfaces of the first, second, third, fourth and fifth storage containers 11, 102, 103, 104 and 105 are , 105 is set smaller than the thickness of the wall.

The thickness of the panel members 111, 121, 131, 141 of the storage containers 102, 103, 104, 105 may be the same, or may be made thicker or thinner toward the outside. is also good. Further, the shape of each storage container 102, 103, 104, 105 is not limited to a cubic shape or a rectangular parallelepiped shape, but may be a polyhedral shape, a cylindrical shape, or the like.

In addition, in the second embodiment, four second, third, fourth, and fifth storage containers 102, 103, 104, and 105 are provided as outer storage containers, but the number is not limited. . That is, since the first storage container 11 stores the radioactive waste 200 inside, the number of the outer storage containers to be prepared and the number of the outer storage containers to be used are appropriately adjusted according to the radiation dose of the radioactive waste 200. You can set it.

Also, the second, third, fourth and fifth storage containers 102, 103, 104 and 105 are applied as outer storage container assembly units before assembly. The outer storage container assembly unit of the second storage container 102 includes a plurality of panel members 111 having a predetermined thickness and made of metal, a plurality of long members 112 attached around the panel members 111, and a plurality of long members 112. and a block member 113 that connects the ends of the length member 112 in the longitudinal direction.

[How to store radioactive waste]
Here, a method for storing the radioactive waste 200 will be described.

The radioactive waste storage method of the second embodiment includes, as in the first embodiment, a step of storing the radioactive waste 200 in the multi-structured radioactive waste storage container 100, and depending on the dose of the radioactive waste 200. and dismantling the outer storage containers 102, 103, 104, 105 in the multi-structured radioactive waste storage container 100.

When the main radionuclide in the radioactive waste 200 is cobalt-60, the storage containers 102, 103, 104, and 105 are dismantled in order every five years, which is the half-life of cobalt-60. In other words, five years after the radioactive waste 200 is stored in the radioactive waste storage container 100, the fifth storage container 105 is disassembled, and ten years after the storage, the fourth storage container 104 is dismantled and stored. Fifteen years after the time, the third storage container 103 is disassembled, and twenty years after the storage time, the second storage container 102 is dismantled.

When the storage containers 102, 103, 104 and 105 are dismantled in order, the panel members 111, 121, 131 and 141 of the dismantled storage containers 102, 103, 104 and 105 have the same shape. Any storage container 102, 103, 104, 105 can be reused.

[Action and effect of the embodiment]
A radioactive waste storage method according to a first aspect includes a step of storing radioactive waste 200 in multi-layered radioactive waste storage containers 10 and 100, and a multi-layered radioactive waste container according to the dose of radioactive waste 200 and dismantling the outer storage containers 12, 13, 14, 15, 102, 103, 104, 105 of the object storage containers 10, 100.

In the radioactive waste storage method according to the first aspect, the outer storage containers 12, 13, 14, 15, 102, 103, 104, and 105 are dismantled according to the radiation dose of the radioactive waste 200. The weight of the radioactive waste container 10, 100 decreases as the period elapses, and the weight and size of the radioactive waste container 10, 100 can be reduced.

A method for storing radioactive waste according to a second aspect includes, as radioactive waste storage containers 10 and 100, a first storage container 11 for storing radioactive waste 200 and a plurality of storage containers for storing the first storage containers 11. 12, 13, 14, 15, 102, 103, 104, 105 are provided, and the storage containers 12, 13, 14, 15, 102, 103, 104, 105 are dismantled according to the radiation dose of the radioactive waste 200. As a result, the radioactive waste 200 is finally stored only in the first storage container 11, and the weight of the radioactive waste storage containers 10 and 100 can be reduced.

The radioactive waste storage method according to the third aspect sets the timing for dismantling the storage containers 12 , 13 , 14 , 15 , 102 , 103 , 104 , and 105 according to the half-life of the radioactive waste 200 . As a result, the dismantling timing of each storage container 12, 13, 14, 15, 102, 103, 104, 105 is set in advance, and the radioactive waste 200 can be easily managed.

In the storage method of radioactive waste according to the fourth aspect, storage containers 12, 13, 14, 15, 102, 103, 104, and 105 are stored according to the radiation dose when radioactive waste 200 is stored in first storage container 11. Set the time to dismantle the As a result, the timing of dismantling each of the storage containers 12, 13, 14, 15, 102, 103, 104, and 105 is set in advance according to the radiation dose when the radioactive waste 200 is stored, and the radioactive waste 200 is managed. can be easily done.

A method for storing radioactive waste according to a fifth aspect dismantles storage containers 12, 13, 14, 15, 102, 103, 104, and 105 according to the radiation dose when the radioactive waste 200 is transported to an external facility. do. As a result, the weight of the radioactive waste container 10, 100 can be reduced when the radioactive waste 200 is transported to an external facility, and the transportation cost can be reduced.

In the storage method of radioactive waste according to the sixth aspect, the dismantled storage containers 12, 13, 14, 15, 102, 103, 104, 105 are separated from the first storage container 11 or the storage containers 12, 13, 14, 102, 103, 104 are stored and reused. Thereby, the storage cost of the radioactive waste 200 can be reduced.

A radioactive waste storage container according to the seventh aspect includes a first storage container 11 in which radioactive waste 200 is stored in a storage container body 21 and sealed by a lid 22 welded; , 61 are provided with storage containers 12 , 13 , 14 , 15 that store the first storage container 11 and are sealed by closing lids 32 , 42 , 52 , 62 .

In the radioactive waste storage container according to the seventh aspect, the first storage container 11 that stores the radioactive waste 200 is sealed by welding, and the storage containers 12, 13, 14, and 15 that store the first storage container 11 are sealed. is closed by fastening. As a result, the shielding performance of the radioactive waste 200 can be improved by the first storage container 11, and the disassembly performance can be improved by the storage containers 12, 13, 14, and 15, thereby improving workability. As a result, the weight of the radioactive waste storage container 10 can be reduced.

In the radioactive waste storage container according to the eighth aspect, the gaps between the inner and outer surfaces of the first storage container 11 and the storage containers 12, 13, 14, and 15 are set to The dimension is set to be smaller than the thickness of the walls constituting 14 and 15 . As a result, sufficient shielding performance can be ensured, and expansion of the storage space can be suppressed.

A radioactive waste storage container according to a ninth aspect comprises a first storage container 11 for storing radioactive waste 200 and a plurality of panel members 111, 121, 131, 141 arranged outside the first storage container 11. Storage containers 102, 103, 104, and 105 that cover the first storage container 11 by being fastened are provided.

In the radioactive waste storage container according to the ninth aspect, the first storage container 11 in which the radioactive waste 200 is stored is divided into storage containers 102, 103, 104, and 105 composed of a plurality of panel members 111, 121, 131, and 141. Keep it closed. Thereby, simplification of the structure in the storage containers 102, 103, 104, and 105 can be achieved. As a result, the weight of the radioactive waste storage container 100 can be reduced.

In the radioactive waste storage container according to the tenth aspect, storage containers 102, 103, 104, 105 are attached to a plurality of panel members 111, 121, 131, 141 and around the panel members 111, 121, 131, 141. and block members 113, 123, 133, and 143 connecting the ends of the plurality of elongate members 112, 122, 132, and 142 in the longitudinal direction. As a result, the storage containers 102, 103, 104, 105 have an assembled structure, and storage space when not in use can be reduced.

The radioactive waste storage container according to the eleventh aspect has storage containers 102, 103, 104, and 105 having a multi-layered structure, with panel members 111, 121, and 131 arranged inside and panel members 121 and 121 arranged outside. 131 and 141 are set to the same dimensions. As a result, the panel members 111, 121, and 131 can be shared, and the manufacturing cost can be reduced, and the storage space can be reduced.

A radioactive waste storage container assembly unit according to a twelfth aspect is a storage container assembly unit for storing a first storage container 11 in which radioactive waste 200 is stored, and has a predetermined thickness and is made of metal. a plurality of panel members 111, 121, 131, 141; a plurality of elongated members 112, 122, 132, 142 attached around the panel members 111, 121, 131, 141; block members 113, 123, 133, 143 connecting the longitudinal ends of 132, 142; As a result, the weight of the radioactive waste storage container 100 can be reduced.

In the above-described embodiment, when the storage containers 12, 13, 14, 15, 102, 103, 104, 105 are dismantled from the radioactive waste storage containers 10, 100, each storage container 12, When dismantling 13, 14, 15, 102, 103, 104, 105 and then transporting them, it is necessary to implement countermeasures against dropping of radioactive waste containers 10, 100. For example, considering the impact received when the radioactive waste storage containers 10 and 100 fall, each storage container 11, 12, 13, 14, 15, 102, 103, 104, and 105 should be strong enough not to be damaged. . In addition, when transporting the radioactive waste container 10, 100, a cushioning material is attached around the container. When transporting the radioactive waste storage container 10, 100, it is stored in a cask or other transportation storage container and transported.

Further, in the above-described embodiment, when storing the radioactive waste storage containers 10, 100, it is conceivable that the radioactive waste storage containers 10, 100 are piled up and stored in order to reduce the storage space. In this case, in order to prevent the radioactive waste storage containers 10 and 100 from falling due to an earthquake or the like, the radioactive waste storage containers 10 and 100 are fixed to each other with wires or lever blocks (registered trademark), or anchored to the lower surface where they are stored. It is preferable to fix the radioactive waste container 10, 100 by using Since the radioactive waste storage containers 10 and 100 have a multi-layered structure, they may be designed with only the strength of the first storage container 11 taken into consideration.

10 radioactive waste storage container 11 first storage container (inner storage container)
12, 102 second storage container (outer storage container)
13, 103 Third storage container (outer storage container)
14, 104 fourth storage container (outer storage container)
15, 105 fifth storage container (outer storage container)
21 storage container body (inner storage container body)
31, 41, 51, 61 storage container main body (outer storage container main body)
22 lid (inner storage container lid)
32, 42, 52, 62 lid (outer storage container lid)
23, 33, 43, 53, 63 storage space 24 welding part 34, 64 bolt 70 fixing device 71 shielding member 72 fastening jig 73 hanging tool 74 magnet 111, 121, 131, 141 panel member 112, 122, 132, 142 Long member 113, 123, 133, 143 Block member 200 Radioactive waste A, B, C, D, E, F, G, H Timing G1, G2, G3 Storage place

Claims (8)

an inner storage container for containing radioactive waste;
an outer storage container covering the inner storage container by fastening a plurality of panel members arranged outside the inner storage container;
with
The outer storage container has the plurality of panel members, a plurality of elongated members attached around the panel members, and a block member connecting longitudinal ends of the plurality of elongated members.
Radioactive waste container. 2. The radioactive waste storage container according to claim 1, wherein said outer storage container has a multi-layered structure, and said inner panel member and said outer panel member are set to have the same dimensions. A radioactive waste storage method using the radioactive waste storage container according to claim 1 or claim 2,
A radioactive waste storage method comprising a plurality of outer storage containers for storing the inner storage containers, and dismantling the outer storage containers according to the radiation dose of the radioactive waste. 4. The method for storing radioactive waste according to claim 3, wherein the timing for dismantling the outer storage container is set according to the half-life of the radioactive waste. 5. The method for storing radioactive waste according to claim 3, wherein the timing for dismantling the outer storage container is set according to the radiation dose when the radioactive waste is stored in the inner storage container. 6. The method for storing radioactive waste according to any one of claims 3 to 5, wherein the outer storage container is dismantled according to the radiation dose when the radioactive waste is transported to an external facility. 7. The radioactive waste storage method according to any one of claims 3 to 6, wherein another inner storage container or outer storage container is stored in the dismantled outer storage container for reuse. An outer storage container assembly unit for storing an inner storage container containing radioactive waste,
a plurality of metal panel members having a predetermined thickness;
a plurality of elongate members attached around the panel member;
a block member that connects longitudinal ends of the plurality of elongated members;
A radioactive waste container assembly unit comprising:

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