Storage facility and transport method for radioactive material storage container

Abstract

To improve the efficiency of moving work of a radioactive material storage container in a storage facility and a carrying method of the radioactive material storage container.SOLUTION: A carry-in / out part provided on one side of the first storage space part and the second storage space part in a direction in which the storage parts are arranged in series, a first penetration part through which the first storage space part and the second storage space part communicate with each other on the one side in the direction in which the storage parts are arranged in series, a second penetration part through which the first storage space part and the second storage space part communicate with each other on the other side in the direction in which the storage parts are arranged in series, and a transport device that moves the radioactive substance storage container supported by the platform in the first storage space part and the second storage space part.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a storage facility and a transportation method for a radioactive material storage container. [Background technology]

[0002] At nuclear facilities, radioactive waste such as spent fuel generated in reactors is stored in radioactive material storage containers (casks) and transported to storage facilities or reprocessing facilities for storage or reprocessing. Radioactive material storage containers consist of a body with a bottom and an open top, and a lid that is fixed to the top of the body and closes the opening. At storage facilities and reprocessing facilities, radioactive material storage containers are supported on a stand in an upright or horizontal position.

[0003] An example of a storage facility for radioactive material containers is described in Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3168189 Summary of the Invention [Problem to be solved by the invention]

[0005] The storage facility includes a storage facility that stores a plurality of radioactive material storage containers that are placed upright on a rack. The storage facility stores a plurality of radioactive material storage containers arranged in series inside the storage facility, and a loading / unloading port is provided at one end of the series. Incidentally, the radioactive material storage containers stored in the storage facility need to be transported to the outside periodically or in the event of an abnormality for inspection. In this case, when a radioactive material storage container located at the innermost part of the storage facility is to be transported, all of the radioactive material storage containers located on the loading / unloading port side of the innermost radioactive material storage container must be transported. Therefore, there is a problem in that the work of transporting the radioactive material storage containers is not efficient and takes a long time.

[0006] The present disclosure is intended to solve the above-mentioned problems, and aims to provide a storage facility and a transportation method for radioactive material storage containers that improve the efficiency of the work of moving radioactive material storage containers. [Means for solving the problem]

[0007] In order to achieve the above object, the storage facility for radioactive material storage containers of the present disclosure stores a plurality of radioactive material storage containers arranged upright on a pedestal, and includes: a first storage space section in which a plurality of storage sections for storing the radioactive material storage containers supported by the pedestal are arranged in series; a second storage space section in which a plurality of storage sections for storing the radioactive material storage containers supported by the pedestal are arranged in series adjacent to the first storage space section; a loading / unloading section provided on one side of the first storage space section and the second storage space section in the series direction of the storage sections; a first penetration section that connects the first storage space section and the second storage space section on one side of the series direction of the storage sections; a second penetration section that connects the first storage space section and the second storage space section on the other side of the series direction of the storage sections; and a transport device that moves the radioactive material storage containers supported by the pedestal in the first storage space section and the second storage space section.

[0008] The radioactive material storage container transport method of the present disclosure also provides a radioactive material storage container storage facility that stores a plurality of radioactive material storage containers that are arranged upright on a pedestal, the radioactive material storage container storage facility including: a first storage space section in which a plurality of storage sections that store the radioactive material storage containers supported on the pedestal are arranged in series; a second storage space section that is adjacent to the first storage space section and in which a plurality of storage sections that store the radioactive material storage containers supported on the pedestal are arranged in series; and a carry-in / out section that is provided on one side of the series direction of the storage sections in the first storage space section and the second storage space section. and the method includes the steps of: transporting the radioactive material storage container located in the storage section in the first storage space section or the second storage space section closest to the carry-in / out section from the carry-in / out section to the outside; circulating the radioactive material storage containers in the multiple storage sections in the first storage space section and the second storage space section using the storage section that has been transported to the outside and become empty; and transporting a predetermined radioactive material storage container from the carry-in / out section to the outside from the carry-in / out section. [Effects of the Invention]

[0009] According to the storage facility and transportation method for radioactive material storage containers of the present disclosure, the efficiency of the work of moving radioactive material storage containers can be improved. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a radioactive material storage container with a part cut away. [Figure 2] FIG. 2 is a plan view showing the storage facility for radioactive material storage containers of this embodiment. [Figure 3] FIG. 3 is a front view showing the storage facility for radioactive substance storage containers of this embodiment. [Figure 4] FIG. 4 is a plan view showing a transport device in a storage facility for radioactive material storage containers. [Figure 5] FIG. 5 is a plan view showing the support device for a radioactive substance storage container of this embodiment. [Figure 6]FIG. 6 is a front view showing the support device for a radioactive substance storage container of this embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing a modified example of the support device for a radioactive substance storage container of this embodiment. [Figure 8] FIG. 8 is a schematic diagram showing a method for transporting a radioactive substance storage container according to this embodiment. [Figure 9] FIG. 9 is a schematic diagram showing a modified example of the method for transporting a radioactive substance storage container according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Note that the present disclosure is not limited to these embodiments, and when there are multiple embodiments, the present disclosure also includes configurations that combine the embodiments. Furthermore, the components in the embodiments include those that can be easily imagined by a person skilled in the art, those that are substantially identical, and those that are within the so-called equivalent range.

[0012] <Radioactive material storage container> FIG. 1 is a perspective view of a radioactive material storage container with a part cut away.

[0013] As shown in FIG. 1, a cask 11 serving as a radioactive material storage container includes a trunk portion 12 and a lid portion 13. The trunk portion 12 has a container body 21. The container body 21 is cylindrical (in this embodiment, cylindrical), has an opening 22 formed at its upper axial end, and is closed at its lower axial end. The container body 21 has an internal cavity 23, and a basket 24 is provided in the cavity 23. The basket 24 is provided with a plurality of cells 25 that can independently store radioactive material (e.g., spent fuel assemblies). The container body 21 is a forged product made of carbon steel that has a gamma ray shielding function, but stainless steel can also be used instead of carbon steel. The container body 21 can also be a cast product made of spheroidal graphite cast iron, carbon steel cast steel, or the like.

[0014] In the trunk 12, an outer cylinder 26 is disposed on the outer peripheral surface of the container body 21 with a predetermined gap therebetween. The container body 21 is provided with a plurality of copper heat transfer fins 27 in the circumferential direction, which perform heat conduction between the outer peripheral surface and the inner peripheral surface of the outer cylinder 26. In the space surrounded by the outer cylinder 26 and the heat transfer fins 27, the container body 21 is provided with a resin (neutron shielding body) 28, which is a polymer material containing a large amount of hydrogen and contains boron or a boron compound that has a neutron shielding function.

[0015] The body 12 is provided with a bottom 29 that protrudes below the closed lower end of the container body 21. The bottom 29 is formed to have dimensions smaller than the outer diameter of the container body 21. The bottom 29 has a space surrounded by the closed lower end of the container body 21, and a resin (neutron shielding body) is provided in the space.

[0016] The barrel 12 is provided with a trunnion 30 for lifting the cask 11 on the vessel body 21. The trunnion 30 is provided penetrating the outer cylinder 26 from the vessel body 21, and protrudes most outward from the cask 11.

[0017] The lid portion 13 is provided at the opening 22 of the vessel body 21, and closes the opening 22 to hermetically seal the vessel body 21 (torso portion 12). The lid portion 13 is composed of a primary lid 31 and a secondary lid 32. The primary lid 31 is formed in a disk shape from a material such as carbon steel or stainless steel that shields against gamma rays. The secondary lid 32 covers the primary lid 31 and appears on the outside of the cask 11, and like the primary lid 31, is also formed in a disk shape from a material such as carbon steel or stainless steel that shields against gamma rays. A resin (neutron shield) 28 may be provided between the primary lid 31 and the secondary lid 32. In addition, a tertiary lid may be provided on the lid portion.

[0018] The primary lid 31 is fixed to a first step 22a formed at the opening 22 of the container body 21 with bolts (not shown) made of carbon steel or stainless steel, and is attached to the container body 21. The secondary lid 32 is fixed to a second step 22b formed at the opening 22 of the container body 21 with bolts (not shown) made of carbon steel or stainless steel, and is attached to the container body 21. Although not shown, metal gaskets are provided between the primary lid 31 and the first step 22a and between the secondary lid 32 and the second step 22b. The metal gaskets ensure sealing between the primary lid 31 and the first step 22a and between the secondary lid 32 and the second step 22b.

[0019] The barrel 12 surrounds the secondary lid 32 at the opening 22 of the vessel body 21, and has a cylindrical upper edge 22c that appears on the outside of the cask 11. The upper surface of the upper edge 22c is located higher than the surface of the secondary lid 32, and surrounds the secondary lid 32. The upper surface of the upper edge 22c has a plurality of bolt holes 33 spaced apart in the circumferential direction for attaching a buffer body A, which will be described later.

[0020] <Radioactive material container storage facilities> FIG. 2 is a plan view showing the storage facility for radioactive material storage containers of this embodiment, FIG. 3 is a front view showing the storage facility for radioactive material storage containers of this embodiment, and FIG. 4 is a plan view showing a transport device in the storage facility for radioactive material storage containers.

[0021] As shown in Figures 2 and 3, a storage facility 60 for radioactive material storage containers (hereinafter referred to as storage facility 60) includes a storage vault 61. The storage facility 60 preferably includes a plurality of storage vaults 61 inside a building. The storage vault 61 can store a plurality of casks 11 supported upright on pedestals 51. The storage vault 61 is entirely made of concrete walls, and has a pair of side walls 62, 63, a rear wall 64, a partition wall 65, and support columns 68. The storage vault 61 also has an opening 66 as a loading / unloading portion, and the opening 66 can be opened and closed by an opening / closing door 67.

[0022] In the storage 61, a first storage space 71 is defined by a side wall 62, a rear wall 64, and a partition wall 65, and a second storage space 72 is defined by a side wall 63, a rear wall 64, and a partition wall 65. The first storage space 71 and the second storage space 72 are arranged horizontally opposite each other with the partition wall 65 in between. In this case, the partition wall 65 is not located on the rear wall 64 side or the opening 66 side. Support columns 68 are provided on the rear wall 64 side and the opening 66 side, respectively, and through-holes 69 are provided between the support columns 68 and the partition wall 65. That is, the storage 61 is provided with a first through-hole 69a on the opening 66 side that connects the first storage space 71 and the second storage space 72. Furthermore, the storage facility 61 is provided with a second penetration portion 69b on the rear wall 64 side that connects the first storage space portion 71 and the second storage space portion 72. The first storage space portion 71 and the second storage space portion 72 are each provided with a plurality of storage portions 73, 74 that can store a plurality of casks 11 (five in this embodiment). The casks 11 are placed on the base 51 in each of the storage portions 73, 74, and the lower trunnions 30 are fixed to the base 51 by a plurality of fasteners 54.

[0023] The cask 11 is movable between the first storage space section 71 and the second storage space section 72 while being fixed on the platform 51. That is, with the opening 66 opened by the opening / closing door 67 of the storage facility 61, the cask 11 fixed on the platform 51 can be moved within each of the first storage space sections 71 and the second storage space section 72 and carried out of the storage facility 61 through the opening 66. Also, with the opening 66 opened by the opening / closing door 67 of the storage facility 61, the cask 11 fixed on the platform 51 outside the storage facility 61 can be moved and carried into each of the first storage space sections 71 and the second storage space section 72. Furthermore, the cask 11 is movable between the first storage space section 71 and the second storage space section 72 through the penetration section 69 while being fixed on the platform 51.

[0024] It should be noted that the storage cabinet 61 is not limited to the above-described configuration. The storage cabinet 61 may have three or more storage space sections, and the number of storage sections 73, 74 is not limited.

[0025] As shown in Figures 2 and 4, the storage facility 61 is provided with a transport device 80. The transport device 80 is provided in each of the first storage space section 71 and the second storage space section 72, and is capable of transporting casks 11 arranged in each of the storage sections 73, 74 of the first storage space section 71 and the second storage space section 72. In this case, it is preferable to provide the transport device 80 in each of the first storage space section 71 and the second storage space section 72, but it may also be provided in only one of the first storage space section 71 and the second storage space section 72 and used in common. Furthermore, the transport device 80 may also be provided in each of the storage sections 73, 74. The transport device 80 has a transport vehicle 81 and an air pallet 82.

[0026] The transporting vehicle 81 has a U-shape in a plan view and has a plurality of wheels 83, a plurality of jacks 84, and a plurality of locking portions 85. The plurality of wheels 83 are provided on both sides of the transporting vehicle 81 and can be rotated by a drive device (not shown), allowing the transporting vehicle 81 to move. The plurality of jacks 84 are provided on both sides of the transporting vehicle 81 and can be extended and retracted by a drive device (not shown), allowing the transporting vehicle 81 to be raised and lowered. The plurality of locking portions 85 are provided on both sides of the transporting vehicle 81 and protrude inward, allowing the platform 51 to be supported.

[0027] The transport vehicle 81 is self-propelled by a plurality of wheels 83. The transport vehicle 81 can rise and fall relative to the floor by extending and retracting a plurality of jacks 84. When the transport vehicle 81 extends the plurality of jacks 84 with the plurality of locking portions 85 positioned below the platform 51, the transport vehicle 81 can raise the cask 11 via the platform 51 by the plurality of locking portions 85. On the other hand, when the transport vehicle 81 retracts the plurality of jacks 84 with the cask 11 in the raised position, the transport vehicle 81 can lower the cask 11.

[0028] The air pallet 82 can be inserted between the platform 10 raised by the transport vehicle 81 and the floor surface. The air pallet 82 has a plurality of wheels 86 and a plurality of air bearings 87. The plurality of wheels 86 are provided on both sides of the air pallet 82 and are rotatable, allowing the air pallet 82 to move. When air is supplied from an air supply source (not shown), the plurality of air bearings 87 form an air layer between them and the floor surface, thereby reducing friction with the floor surface.

[0029] Furthermore, the transporting vehicle 81 is provided with a positioning portion 88 at its tip, which can be positioned at a predetermined position by abutting against a positioning pin 89 protruding from the floor surface. In other words, when the positioning pin 89 does not protrude from the floor surface of each storage section 73, 74, the transporting vehicle 81 can move forward without the positioning portion 88 abutting against the positioning pin 89 when moving forward. On the other hand, when the positioning pin 89 protrudes from the floor surface of each storage section 73, 74, the positioning portion 88 abuts against the positioning pin 89 when moving forward, preventing the transporting vehicle 81 from moving forward and causing it to stop at a predetermined position in each storage section 73, 74.

[0030] The platform 51 on which the cask 11 is mounted is placed in a predetermined storage section 73, 74 of the storage facility 61. First, the multiple jacks 84 of the transport vehicle 81 are extended, and the cask 11 is raised together with the platform 51, forming a gap between the platform 51 and the floor. Next, the air pallet 82 is moved and inserted into the gap between the platform 51 and the floor. Then, the multiple jacks 84 of the transport vehicle 81 are retracted, and the cask 11 is lowered together with the platform 51, and the platform 51 is placed on the air pallet 82.

[0031] Here, by supplying air to the air bearings 87, an air layer is formed between the air bearings 87 and the floor surface. As a result, the platform 51 is raised above the floor surface by the air pallet 82, and the load acting on the transport vehicle 81 is reduced. Therefore, by moving the transport vehicle 81, the cask 11 supported on the platform 51 together with the air pallet 82 can be appropriately moved.

[0032] The transport device 80 is capable of moving the cask 11 supported on the cradle 51 in the first storage space section 71, and is also capable of moving the cask 11 supported on the cradle 51 in the second storage space section 72. The transport device 80 is also capable of moving the cask 11 supported on the cradle 51 between the first storage space section 71 and the second storage space section 72. Note that the transport device 80 is not limited to the configuration described above. For example, the transport device 80 may simply be a device that moves the cradle 51 mounted on a transport vehicle 81.

[0033] <Support device for radioactive material storage containers> FIG. 5 is a plan view showing the support device for a radioactive substance storage container of this embodiment, and FIG. 6 is a front view showing the support device for a radioactive substance storage container of this embodiment.

[0034] As shown in Figures 2 and 3, the storage facility 61 has a support device 100. The support device 100 supports the upper part of the cask 11 arranged upright on the pedestal 51. The support device 100 is provided in each of the storage sections 73, 74 in the first storage space section 71 and the second storage space section 72. The support devices 100 provided in each of the storage sections 73, 74 have almost the same configuration, and the support device 100 provided in the storage section 73 of the first storage space section 71 will be described below.

[0035] As shown in FIGS. 5 and 6, the support device 100 includes a restraining member 101, a support mechanism 102, and a drive device 103.

[0036] The restraining member 101 can restrain the upper outer periphery of the cask 11 in the horizontal direction. The restraining member 101 is ring-shaped. Specifically, the restraining member 101 has a rectangular plate shape and is provided with a circular hole 111 in the center that can be fitted into the upper outer periphery of the cask 11. When the restraining member 101 is in a restraining position where the circular hole 111 is fitted into the upper outer periphery of the cask 11, the lower part of the circular hole 111 comes into contact with the upper part of each trunnion 30 at the upper part of the cask 11.

[0037] However, the restraining member 101 is not limited to this shape. The restraining member 101 may be a circular ring having a circular hole 111 instead of a rectangular plate having a circular hole 111. Furthermore, the restraining member 101 is configured such that the inner periphery of the circular hole 111 comes into contact with the outer periphery of the cask 11. However, for example, a hole may be formed in the center of the restraining member 101, and multiple protrusions may be provided at intervals in the circumferential direction on the inner periphery of the hole, so that the multiple protrusions come into contact with the outer periphery of the cask 11. In other words, the restraining member 101 does not need to come into contact with the entire periphery of the outer periphery of the cask 11, but may come into contact with multiple points on the outer periphery.

[0038] The support mechanism 102 supports the restraint member 101 so that it can move freely in the vertical direction. The side wall 62 and the partition wall 65, which serve as vertical wall portions that form the first storage space 71, are provided with guide grooves 112, 113 that extend along the vertical direction. The restraint member 101 is provided with guide portions 114, 115 on the side wall 62 side and the partition wall 65 side. The guide portions 114, 115 of the restraint member 101 fit into the guide grooves 112, 113 of the side wall 62 and the partition wall 65, and are supported so that it can move freely in the vertical direction. Note that at positions where a support pillar 68 is provided instead of the partition wall 65, the support pillar 68 is provided with the guide grooves 112, 113.

[0039] The drive device 103 can move the restraint member 101 in the vertical direction. The drive device 103 can move the restraint member 101 between a restraint position and a release position. The restraint position is a position where the restraint member 101 descends and engages with the upper outer periphery of the cask 11 to restrain it. The release position is a position where the restraint member 101 ascends and moves upward away from the upper outer periphery of the cask 11. The drive device 103 is a fluid pressure cylinder such as a hydraulic cylinder. However, the drive device 103 is not limited to a fluid pressure cylinder, and may be a rack and pinion mechanism or a ball screw mechanism using a motor or the like.

[0040] The support device 100 is not limited to the above-described configuration. The support device 100 may be any device capable of supporting the upper portion of the cask 11 supported on the pedestal 51. The support device 100 may be eliminated depending on the size of the cask 11 and the supporting force of the fixing device 54. The storage facility 61 may be provided with a fence or the like around the restraint member 101 to prevent workers from falling during work. The storage facility 61 may also be provided with stairs (ladders) or the like on the side walls 62, 63, rear wall 64, partition wall 65, etc., to allow access to the restraint member 101.

[0041] <Modification of the support device for radioactive material storage containers> FIG. 7 is a cross-sectional view showing a modified example of the support device for a radioactive substance storage container of this embodiment.

[0042] As shown in Figure 7, the restraining member 101A can restrain the upper outer periphery of the cask 11 in the horizontal direction. The restraining member 101A is ring-shaped. Specifically, the restraining member 101A has a rectangular plate shape and is provided with a circular hole 111 in the center that can fit into the upper outer periphery of the cask 11. When the restraining member 101A is in a restraining position where the circular hole 111 is fitted into the upper outer periphery of the cask 11, the lower part of the circular hole 111 comes into contact with each of the upper trunnions 30 on the cask 11.

[0043] The restraining member 101A has a recess 121 on its lower surface that fits into the trunnion 30. That is, when the restraining member 101A is lowered to the restraining position, the recess 121 fits into the trunnion 30, thereby restraining the cask 11. In this case, the recess 121 has a semicircular cross-sectional shape and fits into the upper half of the trunnion 30.

[0044] <Operation of the support device for radioactive material storage containers> 2 and 3, multiple casks 11 are arranged and stored in storage sections 73, 74 in the first storage space section 71 and the second storage space section 72 of the storage facility 61, respectively. The support device 100 is positioned at the restraining position when the restraining member 101 is lowered by the drive device 103 via the support mechanism 102. With the restraining member 101 positioned at the restraining position, the support device 100 restrains the horizontal movement of the upper outer periphery of the cask 11. Therefore, in the event of an earthquake, the restraining member 101 restrains the horizontal shaking of the cask 11, preventing it from tipping over.

[0045] Furthermore, in the support device 100, the restraint member 101 abuts and contacts the upper part of the trunnion 30 at the restraint position, thereby restraining the vertical movement of the cask 11. Therefore, in the event of an earthquake, the vertical shaking of the cask 11 is suppressed by the restraint member 101, and tipping is suppressed. Furthermore, as shown in Figure 7, in the support device 100, the recess 121 of the restraint member 101 engages and contacts the upper part of the trunnion 30 at the restraint position, thereby restraining the vertical and circumferential movement of the cask 11. Therefore, in the event of an earthquake, the restraint member 101A suppresses the vertical shaking and circumferential movement of the cask 11, and tipping is suppressed.

[0046] <Method of transporting radioactive material storage containers> FIG. 8 is a schematic diagram showing a method for transporting a radioactive substance storage container according to this embodiment.

[0047] 2 and 3, the cask 11 stored in the storage facility 60 needs to be removed from the storage facility 61 periodically or in the event of an emergency for inspection, etc. At this time, the support (restraint) of the cask 11 by the support device 100 is released.

[0048] As shown in Figure 8, a case will be described in which a cask 11 placed in the storage section 73e, which is the innermost section (left end in Figure 2) of the first storage space section 71, is transported to the outside. First, the opening 66 is opened by the opening / closing door 67. Next, the support device 100 for the cask 11 placed in the storage section 73a, which is the closest to the opening 66 in the first storage space section 71 (right end in Figure 2), is operated. That is, the support device 100 of the storage section 73a raises the restraining member 101 to release the restraint of the cask 11. Then, the transport device 80 supports the platform 51 on which the cask 11 is supported in the storage section 73a, and the cask is transported from the storage facility 61 to the outside.

[0049] The cask 11 that has been transported outside the storage facility 61 is supported, for example, on a temporary storage table (not shown). The temporary storage table is arranged inside the storage facility 60 close to the storage facility 61, and is equipped with a support device 100, which prevents the cask 11 from tipping over. The cask 11 that has been transported outside the storage facility 61 may be transported into another storage facility 61.

[0050] When the cask 11 placed in storage section 73a in the first storage space section 71 is removed, the vacant storage section 73a is used to circulate the casks 11 placed in the multiple storage sections 73b, 73c, 73d, 73e, 74a, 74b, 74c, 74d, and 74e in the first storage space section 71 and the second storage space section 72. In other words, the support of the support device 100 is released from the cask 11 placed in storage section 73b in the first storage space section 71, the cask 11 is moved to storage section 73a by the transport device 80, and the cask 11 is supported by the support device 100 in storage section 73a. Then, storage section 73b becomes vacant.

[0051] Next, the support device 100 is released from support for the cask 11 placed in storage section 73c in the first storage space section 71, the cask 11 is moved to storage section 73b by the transport device 80, and the cask 11 is supported in storage section 73b by the support device 100. This leaves storage section 73c empty. Similarly, the cask 11 placed in storage section 73d is moved to storage section 73c, and the cask 11 in storage section 73e is moved to storage section 73d. Furthermore, the cask 11 in storage section 74e of the second storage space section 72 is moved to storage section 73e of the first storage space section 71, and similarly, the casks 11 in each of the storage sections 73, 74 of the first storage space section 71 and the second storage space section 72 are moved to the adjacent storage sections 73, 74.

[0052] By this repeated circular movement of the cask 11, the cask 11 arranged in the innermost storage section 73e in the first storage space section 71 moves to the innermost storage section 73a in the first storage space section 71. Here, the cask 11 arranged in the storage section 73a in the first storage space section 71 is transported to the outside by the transport device 80. The cask 11 transported to the outside is transported to a predetermined inspection table (not shown) where inspection is performed. The inspection table is arranged inside or outside the storage facility 60, and a support device 100 is provided to prevent the cask 11 from tipping over during inspection.

[0053] In this way, when casks 11 stored in storage sections 73, 74 are removed from storage facility 61, only the casks 11 in storage sections 73, 74 near opening 66 are removed to the outside, and the other casks 11 simply need to be moved circulating between first storage space section 71 and second storage space section 72, eliminating the need to remove them to the outside, eliminating the risk of them tipping over, and eliminating the need to install a large number of temporary storage tables outside. Furthermore, since support devices 100 are individually provided in each storage section 73, 74, casks 11 that are not being moved are supported by support devices 100, eliminating the risk of them tipping over.

[0054] <Modification of the method for transporting radioactive material storage containers> FIG. 9 is a schematic diagram showing a modified example of the method for transporting a radioactive substance storage container according to this embodiment.

[0055] As shown in FIG. 9 , the storage cabinet 61 has a pair of side walls 62, 63, a rear wall 64, and a support column 68. The side walls 62, 63, the rear wall 64, and the support column 68 define a first storage space 71 and a second storage space 72 in the storage cabinet 61. The first storage space 71 and the second storage space 72 are arranged horizontally opposite each other with the support columns 68 in between. A through-hole 69 is provided between each of the support columns 68. That is, the storage cabinet 61 is provided with a first through-hole 69a on the opening 66 side, which connects the first storage space 71 and the second storage space 72. The storage cabinet 61 is also provided with a second through-hole 69b on the rear wall 64 side, which connects the first storage space 71 and the second storage space 72. Furthermore, the storage 61 is provided with third penetration portions 69c, 69d, and 69e between the first penetration portion 69a and the second penetration portion 69b, which connect the first storage space portion 71 and the second storage space portion 72 to each other.

[0056] The cask 11 is movable along the serial direction of the storage sections 73 in the first storage space section 71. The cask 11 is also movable along the serial direction of the storage sections 74 in the second storage space section 72. Furthermore, the cask 11 is movable between the first storage space section 71 and the second storage space section 72 through the penetration section 69.

[0057] The following describes the case where a cask 11 placed in storage section 73c in the first storage space section 71 is transported to the outside. First, the opening 66 is opened by the opening / closing door 67. Next, the support device 100 for the cask 11 placed in storage section 73a, which is closest to the opening 66 in the first storage space section 71, is operated. That is, the support device 100 in storage section 73a lifts the restraining member 101 to release the restraint of the cask 11. Then, the transport device 80 supports the platform 51 on which the cask 11 is supported in storage section 73a, and the cask is transported from the storage facility 61 to the outside.

[0058] When the cask 11 placed in the storage section 73a in the first storage space section 71 is removed, the vacant storage section 73a is used to circulate the casks 11 placed in the multiple storage sections 73b, 73c, 74a, 74b, and 74c in the first storage space section 71 and the second storage space section 72. However, the cask 11f placed in the multiple storage sections 73d, 73e, 74d, and 74e in the first storage space section 71 and the second storage space section 72 is not circulated. In other words, the support device 100 is released from the support of the cask 11 placed in the storage section 73b in the first storage space section 71, the cask 11 is moved to the storage section 73a by the transport device 80, and the cask 11 is supported by the support device 100 in the storage section 73a. Then, the storage section 73b becomes vacant.

[0059] Next, the support device 100 is released from support for the cask 11 placed in storage section 73c in the first storage space section 71, the cask 11 is moved to storage section 73b by the transport device 80, and the cask 11 is supported in storage section 73b by the support device 100. This leaves storage section 73c empty. Furthermore, the cask 11 in storage section 74c of the second storage space section 72 is moved to storage section 73c of the first storage space section 71, and similarly, the casks 11 in each of the storage sections 73, 74 of the first storage space section 71 and the second storage space section 72 are moved to the adjacent storage sections 73, 74.

[0060] By this repeated circular movement of the cask 11, the cask 11 arranged in the storage section 73c in the first storage space section 71 moves to the frontmost storage section 73a in the first storage space section 71. Here, the cask 11 arranged in the storage section 73a in the first storage space section 71 is transported to the outside by the transport device 80. The cask 11 transported to the outside is transported to a predetermined inspection table (not shown) where inspection is performed. The inspection table is arranged inside or outside the storage facility 60, and a support device 100 is provided, thereby preventing the cask 11 from tipping over during inspection.

[0061] In this way, when casks 11 stored in storage sections 73, 74 are removed from storage facility 61, only the casks 11 in storage sections 73, 74 near opening 66 are removed to the outside, and the other casks 11 only need to be circulated through first storage space section 71 and second storage space section 72, eliminating the need to remove them to the outside, eliminating the risk of them tipping over, and eliminating the need to provide a large number of temporary storage tables outside. Also, depending on the storage locations of the casks 11 to be removed to the outside, it is not necessary to circulate all of the casks 11, and it is sufficient to circulate only some of the casks 11, simplifying the work and shortening the work time.

[0062] In the above description, the cask 11 is circulated clockwise in plan view and transported from the first storage space 71 to the outside through the opening 66, but this method is not limited to this. Depending on the storage position of the cask 11 to be transported to the outside, for example, the cask 11 may be circulated counterclockwise in plan view and transported from the second storage space 72 to the outside through the opening 66.

[0063] Furthermore, when returning the cask after inspection to the storage facility 61, it is preferable to return the cask 11 to the original storage section 73, 74. However, the cask after inspection may also be returned to the storage section 73, 74 near the opening 66 in the storage facility 61. In this case, it is preferable to assign a number to the cask 11 and store and manage the storage history of the cask 11.

[0064] [Effects of this embodiment] The storage facility for radioactive material storage containers according to the first aspect includes a first storage space section 71 in which a plurality of storage sections 73 for storing casks (radioactive material storage containers) supported on a pedestal 51 are arranged in series, a second storage space section 72 in which a plurality of storage sections 74 for storing casks 11 supported on the pedestal 51 are arranged in series adjacent to the first storage space section 71, and a storage space section 72 in which a plurality of storage sections 74 for storing casks 11 supported on the pedestal 51 are arranged in series. an opening (loading / unloading section) 66 provided on one side of the storage sections 73, 74; a first penetration section 69a connecting the first storage space section 71 and the second storage space section 72 on one side of the storage sections 73, 74 in the serial direction; a second penetration section 69b connecting the first storage space section 71 and the second storage space section 72 on the other side of the storage sections 73, 74 in the serial direction; and a transport device 80 for moving the cask 11 supported on the frame 51 in the first storage space section 71 and the second storage space section 72.

[0065] According to the storage equipment for radioactive material containers of the first embodiment, the transport device 80 can circulate the casks 11 supported on the frames 51 in the first storage space section 71 and the second storage space section 72, so that only the casks 11 in the storage sections 73, 74 near the opening 66 can be transported to the outside, and there is no need to transport the other casks 11 to the outside, thereby making it possible to improve the efficiency of the cask 11 movement work.

[0066] The storage facility for radioactive material storage containers according to the second aspect is the storage facility for radioactive material storage containers according to the first aspect, and further, the transport device 80 is capable of moving the casks 11 supported on the cradles 51 in the first storage space section 71 and the second storage space section 72 along the serial direction of the storage sections 73, 74, and is also capable of moving the casks 11 supported on the cradles 51 between the first storage space section 71 and the second storage space section 72 through the first penetration part 69a and the second penetration part 69b along the horizontal direction perpendicular to the serial direction of the storage sections 73, 74. This reduces the number of casks 11 to be transported to the outside, thereby improving the efficiency of the cask 11 movement work.

[0067] The storage facility for radioactive material storage containers according to the third aspect is the storage facility for radioactive material storage containers according to the first or second aspect, further comprising a partition wall 65 provided between the first storage space section 71 and the second storage space section 72, and a first penetration section 69a provided at one end of the partition wall 65 in the serial direction of the storage sections 73, 74, and a second penetration section 69b provided at the other end of the serial direction of the storage sections 73, 74. This allows the partition wall 65 to improve the strength of the storage facility 61, and also allows the casks 11 to be circulated appropriately.

[0068] The storage facility for radioactive material storage containers according to the fourth aspect is the storage facility for radioactive material storage containers according to any one of the first to third aspects, and further includes a support device 100 that is provided in the storage sections 73, 74 and supports the upper part of the cask 11 that is supported on the pedestal 51. This makes it possible to prevent the immobile cask from tipping over.

[0069] The method for transporting a radioactive material storage container according to the fifth aspect includes a first storage space section 71 in which a plurality of storage sections 73 for storing casks (radioactive material storage containers) 11 supported by a pedestal 51 are arranged in series, a second storage space section 72 in which a plurality of storage sections 74 for storing casks 11 supported by the pedestal 51 are arranged in series adjacent to the first storage space section 71, and an opening (carrying in / out section) 66 provided on one side of the series direction of the storage sections 73, 74 in the first storage space section 71 and the second storage space section 72, The method includes the steps of transporting casks 11 located in storage sections 73, 74 closest to the opening 66 in the first storage space section 71 or the second storage space section 72 to the outside through the opening 66, circulating the casks 11 in the multiple storage sections 73, 74 of the first storage space section 71 and the second storage space section 72 using the storage sections 73, 74 that have been transported to the outside and become vacant, and transporting a predetermined cask 11 from the multiple casks 11 that are being circulated to the outside through the opening 66. This allows only the casks 11 in the storage sections 73, 74 near the opening 66 to be transported to the outside, eliminating the need to transport the other casks 11, thereby improving the efficiency of the cask 11 movement work.

[0070] The method for transporting a radioactive material storage container according to the sixth aspect is the method for transporting a radioactive material storage container according to the fifth aspect, and further, when a cask 11 is transported outside and an empty storage section 73, 74 is generated, the cask 11 in the storage section 73, 74 adjacent to the empty storage section 73, 74 is moved to the empty storage section 73, 74, thereby circulating the multiple casks 11. This allows the casks 11 to be moved efficiently.

[0071] The method for transporting a radioactive material storage container according to the seventh aspect is the method and apparatus for transporting a radioactive material storage container according to the fifth or sixth aspect, and further comprises a storage section 74 of the first storage space section 71 and a storage section 74 of the second storage space section 72, which are capable of moving casks 11 supported on stands 51 between the adjacent storage sections 73, 74. This makes it possible to change the circulation route of the casks 11 depending on the storage position of the casks 11 to be transported outside, and reduces the number of casks 11 that are circulated, thereby simplifying the work and shortening the work time.

[0072] The method for transporting a radioactive material storage container according to the eighth aspect is a method for transporting a radioactive material storage container according to any one of the fifth to seventh aspects, and further supports the upper part of the cask 11 when the cask 11 supported by the cradle 51 stops in the storage section 73, 74, and releases the support for the upper part of the cask 11 when the cask 11 supported by the cradle 51 moves from the storage section 73, 74. This makes it possible to prevent the cask from tipping over when it is not moving.

[0073] In the above-described embodiment, the storage facility 61 stores the cask 11 by supporting it in an upright position on the platform 51, but the storage facility 61 may also store the cask 11 by supporting it in a horizontal position on the platform 51.

[0074] In the above-described embodiment, the storage facility 60 can be applied to a repository in a nuclear power plant, a reprocessing facility, a disposal facility, or the like. [Explanation of symbols]

[0075] 11 Cask (container for storing radioactive materials) 12 Torso 13 Lid 30 Trunnion 51 Mounting stand 54 Fixtures 60 Storage Facilities 61 Storage 62,63 Side wall 64 Rear wall 65 Partition Wall 66 Opening 67 Opening and Closing Doors 68 Support column 69 Penetration 69a First penetration 69b 2nd penetration part 69c, 69d, 69e Third penetration section 71 1st storage space 72 Second storage space 73,73a,73b,73c,73d,73e,74,74a,74b,74c,74d,74e Storage department 80 Conveyor 81 Transport cart 82 Air Pallet 100 Support device 101, 101A Restraining member 102 Support mechanism 103 Drive unit 111 Circular hole 112,113 Guide groove 114,115 Guide section 121 recess

Claims

1. In a storage facility for radioactive material containers that stores multiple radioactive material containers arranged on a rack, a first storage space section in which a plurality of storage sections for storing the radioactive material storage containers supported by the rack are arranged in series; a second storage space section in which a plurality of storage sections for storing the radioactive material storage containers supported by the rack are arranged in series adjacent to the first storage space section; a loading / unloading section provided on one side of the storage sections in the serial direction of the first storage space section and the second storage space section; a first penetration portion that communicates the first storage space portion and the second storage space portion on one side of the storage portion in the serial direction; a second penetration portion that communicates the first storage space portion and the second storage space portion on the other side of the storage portion in the serial direction; a transport device for moving the radioactive material storage container supported by the frame in the first storage space section and the second storage space section; Storage facilities for radioactive material containers.

2. the transport device is capable of moving the radioactive material storage containers supported on the stands in the first storage space section and the second storage space section along the serial direction of the storage sections, and is also capable of moving the radioactive material storage containers supported on the stands between the first storage space section and the second storage space section through the first penetration section and the second penetration section along a horizontal direction perpendicular to the serial direction of the storage sections. A storage facility for radioactive material containers according to claim 1.

3. a partition wall is provided between the first storage space section and the second storage space section, and the first penetration portion is provided at one end of the partition wall in the serial direction of the storage sections, and the second penetration portion is provided at the other end of the partition wall in the serial direction of the storage sections; A storage facility for radioactive material containers according to claim 2.

4. a support device provided in the storage unit and supporting an upper portion of the radioactive material storage container supported on a stand; A storage facility for radioactive material containers according to claim 1.

5. In a storage facility for radioactive material containers that stores a plurality of radioactive material containers arranged upright on a rack, a first storage space section in which a plurality of storage sections for storing the radioactive material storage containers supported by the rack are arranged in series; a second storage space section in which a plurality of storage sections for storing the radioactive material storage containers supported by the rack are arranged in series adjacent to the first storage space section; a loading / unloading section provided on one side of the storage sections in the serial direction of the first storage space section and the second storage space section; Equipped with carrying out the radioactive material storage container arranged in the storage section closest to the carry-in / out section in the first storage space section or the second storage space section from the carry-in / out section to the outside; a step of circulating and transferring the radioactive material storage containers in the plurality of storage sections of the first storage space section and the second storage space section by using the storage section that has been carried out to the outside and become vacant; carrying out a predetermined radioactive material storage container from the carry-in / out section to the outside from among a plurality of circulating radioactive material storage containers; A method for transporting a radioactive material storage container having the above structure.

6. When the radioactive material storage container is carried out to the outside and an empty storage section is generated, the radioactive material storage container in the storage section adjacent to the empty storage section is moved to the empty storage section, thereby circulating the plurality of radioactive material storage containers. The method for transporting a radioactive material storage container according to claim 5.

7. the storage section of the first storage space section and the storage section of the second storage space section are capable of moving the radioactive material storage container supported by the rack between the adjacent storage sections. The method for transporting a radioactive material storage container according to claim 5.

8. when the radioactive material storage container supported by the pedestal is stopped in the storage section, an upper portion of the radioactive material storage container is supported, and when the radioactive material storage container supported by the pedestal is moved from the storage section, support for the upper portion of the radioactive material storage container is released. The method for transporting a radioactive material storage container according to claim 5.

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