Support device for radioactive substance container and storage facility

Abstract

To provide a support device and a storage facility for a radioactive material storage container capable of suppressing damage due to falling of the radioactive material storage container and simplifying support operation and release operation of the radioactive material storage container.SOLUTION: A support device for a radioactive substance storage container that supports a radioactive substance storage container arranged in an upright state on a rack includes a restraining member that can restrain an upper outer peripheral portion of the radioactive substance storage container in a horizontal direction, a support mechanism that supports the restraining member so as to be movable between a restraining position where the radioactive substance storage container is restrained and a releasing position where the restraint of the radioactive substance storage container is released, and a drive device that moves the restraining member between the restraining position and the releasing position.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] At nuclear facilities, radioactive waste such as spent fuel generated in reactors is stored in radioactive material containers (casks) and transported to storage facilities or reprocessing facilities for storage or reprocessing. Radioactive material 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. Radioactive material containers are supported upright on a pedestal at storage facilities and reprocessing facilities.

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

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-207359 Summary of the Invention [Problem to be solved by the invention]

[0005] A radioactive material storage container is placed upright on a pedestal, and its lower end is supported by a plurality of fasteners. A plurality of radioactive material storage containers are stored adjacent to one another in a storage facility. Since only the lower end of each radioactive material storage container is supported on the pedestal by a plurality of fasteners, there is a concern that the container may tip over and be damaged in the event of an earthquake. Therefore, in some conventional storage facilities, adjacent radioactive material storage containers are connected to one another at the top. However, radioactive material storage containers stored in storage facilities need to be transported to the outside periodically or in the event of an emergency for inspection. Connecting adjacent radioactive material storage containers to one another at the top, as in conventional storage facilities, requires all of the connections to be disconnected during inspection, which poses a problem of requiring a long time for the work.

[0006] The present disclosure is intended to solve the above-mentioned problems, and aims to provide a support device and storage facility for radioactive material storage containers that suppresses damage to radioactive material storage containers due to tipping over and simplifies the support and release operations for the radioactive material storage containers. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the support device for a radioactive material storage container of the present disclosure is a support device for a radioactive material storage container that supports a radioactive material storage container that is placed upright on a stand, and includes: a restraining member that can restrain the upper outer periphery of the radioactive material storage container in the horizontal direction; a support mechanism that supports the restraining member so that it can be moved between a restraining position that restrains the radioactive material storage container and a release position that releases the restraint on the radioactive material storage container; and a drive device that moves the restraining member between the restraining position and the release position.

[0008] In addition, the storage facility for radioactive material storage containers of the present disclosure includes a storage facility in which multiple storage sections are arranged horizontally in a row, each capable of accommodating radioactive material storage containers arranged upright on a rack, and a support device for the radioactive material storage containers, which is provided in the storage section. [Effects of the Invention]

[0009] According to the support device and storage facility for radioactive material storage containers of the present disclosure, it is possible to prevent damage to the radioactive material storage containers due to tipping over, and to simplify the support and release operations for the radioactive material storage containers. [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. 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, and a partition wall 65. 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 facility 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. The first storage space 71 and the second storage space 72 are each provided with a plurality of storage sections 73, 74 capable of storing a plurality of casks 11 (five in this embodiment). The casks 11 are placed on the base 51 in each storage section 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 while fixed on the platform 51 in the first storage space section 71 and the second storage space section 72. 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 from the opening 66 to the outside of the storage facility 61. 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.

[0024] It should be noted that the storage cabinet 61 is not limited to the above-described configuration. The storage cabinet 61 may have only one storage space section, or three or more storage spaces, and there is no limit to the number of storage sections 73, 74. In addition, although the first storage space section 71 and the second storage space section 72 are configured to be separated by the partition wall 65, a support pillar or the like may be provided instead of the partition wall 65.

[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 51 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 to the plurality of air bearings 87 from an air supply source (not shown), an air layer is formed between the plurality of air bearings 87 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 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 inserted into the upper outer periphery of the cylindrical cask 11. If the cask is polygonal prism-shaped, the restraining member 101 is provided with a polygonal hole in the center that can be inserted into the upper outer periphery of the polygonal prism-shaped cask 11. In other words, the shape of the hole in the center of the restraining member 101 is set according to the shape of the cask 11. However, the shape does not have to be the same as the shape of the hole in the restraining member 101 as long as it can restrain the horizontal movement 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 contacts the upper part of each upper trunnion 30 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. In addition, the restraining member 101 is configured such that the inner periphery of the circular hole 111 contacts 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 contact the outer periphery of the cask 11. In other words, the restraining member 101 does not need to contact the entire periphery of the outer periphery of the cask 11, but may contact multiple points on the outer periphery. However, the restraining member 101 may not contact the outer periphery of the cask 11, and a clearance may be provided.

[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 run 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 if a support pillar is provided instead of the partition wall 65, the guide groove is provided in the support pillar.

[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 storage facility 61 may be provided with a fence or the like around the restraining member 101 to prevent workers from falling while working. The storage facility 61 may also be provided with stairs (ladders) or the like on the side walls 62, 63, the rear wall 64, the partition wall 65, etc., to allow access to the restraining 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] 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.

[0047] The following describes the case where the cask 11 located at the innermost part of the first storage space section 71 (left end in Figure 2) 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 closest to the opening 66 in the first storage space section 71 (right end in Figure 2) is operated. That is, the corresponding support device 100 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, and the cask 11 is transported from the storage section 73 of the storage facility 61 to the outside.

[0048] 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.

[0049] After the cask 11 closest to the opening 66 in the first storage space section 71 has been removed, the support device 100 is released from the cask 11 second closest to the opening 66 in the first storage space section 71, and the cask 11 is then removed to the outside by the transport device 80. In this manner, four casks 11 are removed to the outside of the storage facility 61. Finally, the support device 100 is released from the innermost cask 11 in the first storage space section 71, and the cask 11 is then removed to the outside by the transport device 80. The cask 11 removed to the outside is transported to a predetermined inspection table (not shown) where an inspection is performed. The inspection table is located inside or outside the storage facility 60, and the support device 100 is provided to prevent the cask 11 from tipping over during the inspection.

[0050] In this way, when casks 11 stored in a predetermined location are removed from the storage facility 61, the casks 11 not involved in the removal remain supported by the support devices 100, and there is no risk of them tipping over. Furthermore, since the support devices 100 are individually provided in each storage section 73, the support devices 100 involved in the removal can be released in order, making it possible to safely, easily, and quickly restrain and release the casks.

[0051] [Effects of this embodiment] The support device for a radioactive material storage container in the first embodiment includes a restraint member 101, 100A that can restrain the upper outer periphery of a cask (radioactive material storage container) 11 in the horizontal direction, a support mechanism 102 that supports the restraint member 101, 100A at a restraint position that restrains the cask 11 and a release position that releases the restraint of the cask 11, and a drive device 103 that moves the restraint member 101, 100A between the restraint position and the release position.

[0052] According to the support device for a radioactive material storage container of the first aspect, the restraining members 101, 100A are lowered via the support mechanism 102 by the drive device 103 to the restraining position for the cask 11 supported upright on the pedestal 51. Here, the upper outer periphery of the cask 11 is supported by the restraining members 101, 100A, and horizontal movement is restrained. This makes it possible to prevent damage to the cask 11 due to tipping over, and also simplifies the support and release operations for the cask 11.

[0053] The support device for a radioactive material storage container according to the second aspect is the support device for a radioactive material storage container according to the first aspect, and further, the restraining members 101, 101A are ring-shaped, which simplifies the restraining members 101, 101AA.

[0054] The support device for a radioactive material storage container according to the third aspect is the support device for a radioactive material storage container according to the first or second aspect, and further includes restraining members 101, 101A each having a rectangular plate shape and a circular hole 111 at the center that can be inserted into the upper outer periphery of cask 11. This allows the circular hole 111 of restraining members 101, 101A to properly support cask 11, and the rectangular plate shape of restraining members 101, 101A allows them to be properly supported by support mechanism 102 so as to be freely movable along the vertical direction.

[0055] The support device for a radioactive material storage container according to the fourth aspect is the support device for a radioactive material storage container according to any one of the first to third aspects, and further, when the restraining members 101, 101A are in the restraining position, they come into contact with the trunnion 30 of the cask 11. As a result, the vertical movement of the cask 11 is restrained by the restraining members 101, 101A, and the restraining members 101, 101A suppress not only horizontal but also vertical shaking, thereby preventing the cask 11 from tipping over.

[0056] The support device for a radioactive material storage container according to the fifth aspect is the support device for a radioactive material storage container according to the fourth aspect, and further, the restraining member 100A is provided with a recess 121 on the lower surface thereof that fits onto the trunnion 30. As a result, the cask 11 is restrained from moving in the vertical and circumferential directions by the recess 121 of the restraining member 100A, and shaking not only in the horizontal direction but also in the vertical and circumferential directions is suppressed by the restraining members 101, 101A, thereby preventing the cask 11 from tipping over.

[0057] The support device for a radioactive material storage container according to the sixth aspect is the support device for a radioactive material storage container according to any one of the first to fifth aspects, and further includes a vertical wall portion provided around the periphery of the cask 11, and the restraining members 101, 101A are supported by the support mechanism 102 so as to be movable along the vertical direction. This allows the restraining members 101, 101A to be properly supported.

[0058] The storage facility for radioactive material storage containers according to the seventh aspect includes a storage facility 61 in which a plurality of storage units 73, 74 are arranged horizontally, each capable of accommodating a cask (radioactive material storage container) 11 arranged upright on a pedestal 51, and a support device 100 provided in the storage units 73, 74. As a result, the upper outer periphery of the cask 11 arranged in the storage unit 73, 74 is supported by restraining members 101, 100A of the support device 100, and horizontal movement is restrained. This makes it possible to prevent damage to the cask 11 due to tipping over, and also simplifies the support and release operations for the cask 11.

[0059] The storage facility for radioactive material storage containers according to the eighth aspect includes a temporary storage site provided with a storage unit capable of accommodating a cask (radioactive material storage container) 11 arranged upright on a pedestal 51, and a support device 100 provided in the temporary storage site. As a result, the upper outer periphery of the cask 11 arranged in the storage unit is supported by restraining members 101, 100A of the support device 100, and horizontal movement is restrained. This makes it possible to prevent damage to the cask 11 due to tipping over, and also simplifies the support and release operations for the cask 11.

[0060] The storage facility for radioactive material storage containers according to the ninth aspect includes an inspection site provided with a storage unit capable of arranging a cask (radioactive material storage container) 11 arranged upright on a pedestal 51, and a support device 100 provided in the inspection site. As a result, the upper outer periphery of the cask 11 arranged in the storage unit is supported by restraining members 101, 100A of the support device 100, and horizontal movement is restrained. This makes it possible to prevent damage to the cask 11 due to tipping over, and also simplifies the support and release operations for the cask 11.

[0061] The storage facility for radioactive material storage containers according to the tenth aspect is the storage facility for radioactive material storage containers according to any one of the seventh to ninth aspects, and further, a support device 100 is provided in each of the multiple storage sections 73, 74 and operates independently. As a result, the upper outer periphery of each of the casks 11 arranged in the storage sections 73, 74 is individually supported by the restraining members 101, 100A of the support device 100, and horizontal movement is restrained, thereby efficiently preventing the casks 11 from tipping over.

[0062] In the above-described embodiment, the restraint members 101, 101A are rectangular plate-shaped and supported by the support mechanism 102 so as to be freely movable in the vertical direction, but this configuration is not limited to this. For example, the restraint members may be divided into two parts and moved like double doors, so that they can be freely moved between the restraint position and the release position of the cask 11.

[0063] In the above-described embodiment, the support device 100 has been described as being applied to the repository 61, but the support device 100 may also be applied to a temporary placement table or an inspection table. The support device 100 may also be applied to repositories such as nuclear power plants, reprocessing facilities, and disposal facilities. [Explanation of symbols]

[0064] 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 71 1st storage space 72 Second storage space 73,74 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. A support device for a radioactive material storage container that supports a radioactive material storage container arranged in an upright position on a stand, a restraining member capable of restraining an upper outer periphery of the radioactive material storage container in a horizontal direction; a support mechanism that supports the restraint member movably between a restraining position where the restraint member restrains the radioactive material storage container and a release position where the restraint member releases the radioactive material storage container; a drive device that moves the restraining member between the restraining position and the release position; A support device for a radioactive material storage container comprising:

2. The restraining member is ring-shaped. The support device for a radioactive material storage container according to claim 1.

3. The restraint member has a rectangular plate shape and a circular hole in the center that can be inserted into the upper outer periphery of the radioactive material storage container. The support device for a radioactive material storage container according to claim 2.

4. When the restraining member is in the restraining position, the restraining member contacts a trunnion of the radioactive material storage container. The support device for a radioactive material storage container according to claim 1.

5. The restraint member has a recess provided on a lower surface thereof that fits onto the trunnion. The support device for a radioactive material storage container according to claim 4.

6. a vertical wall portion is provided around the radioactive material storage container, and the restraint member is supported by the support mechanism so as to be movable along the vertical direction; The support device for a radioactive material storage container according to claim 1.

7. a storage facility in which a plurality of storage units capable of accommodating radioactive material storage containers arranged upright on a stand are arranged in a horizontal direction; a support device for a radioactive material storage container according to claim 1, which is provided in the storage unit; Storage facilities for radioactive material containers.

8. a temporary storage area provided with a storage unit capable of accommodating radioactive material storage containers arranged upright on a stand; a support device for a radioactive material storage container according to claim 1 that is provided in the temporary storage site; Storage facilities for radioactive material containers.

9. an inspection site provided with a storage unit capable of arranging a radioactive material storage container placed upright on a stand; a support device for a radioactive material storage container according to claim 1, which is provided at the inspection site; Storage facilities for radioactive material containers.

10. The support device is provided in each of the plurality of storage units and operates independently. A storage facility for a radioactive material storage container according to any one of claims 7 to 9.

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