JP4381321B2 - Radioactive material storage room - Google Patents

Description

  The present invention relates to a storage chamber for radioactive material.

  Conventionally, a vertical loading system has been used in the storage chamber of a fuel assembly, which is one of the radioactive materials, and is surrounded by a thick concrete wall surface, into a long storage pit formed in a vertical direction, from above. The fuel assemblies were inserted one by one. Specifically, a crane that moves the fuel assemblies in the vertical direction is used when the fuel assemblies are stored in the storage pits and taken out from the storage pits.

JP 7-215664 A Japanese Patent Laid-Open No. 10-246796

  In the conventional fuel assembly storage chamber, the fuel assembly is stored and taken out using a crane that moves the fuel assembly in the vertical direction. Therefore, at least the height of the fuel assembly is at least the height. It was necessary to secure above the storage pit, and a considerably large space was required above the storage pit.

  Moreover, the storage pit itself is formed in a rectangular parallelepiped shape with a square cross section, but the storage pit insertion port is sealed by a stepped cylindrical plug to prevent radiation leakage. The storage pit insertion port The plug that seals out requires a much larger area than the required area of the storage pit itself. Therefore, it is difficult to increase the installation density of the storage pits, and the space of the fuel assembly storage chamber is made larger than necessary.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a radioactive substance storage chamber capable of saving space.

The radioactive substance storage chamber according to the first invention for solving the above-mentioned problems is
A basket that has a guided function used for guidance at the time of guidance on one of the opposing outer surfaces, has a supported function supported at the time of fixing on the other outer surface, and contains a plurality of radioactive substances;
At least one passage through which the basket is moved horizontally;
A storage space that is provided along the passage and has a guide function for guiding the guided function and a horizontal support function for supporting the supported function, and stores the basket;
A moving device having a lift function for moving the basket in the vertical direction while horizontally moving the passage;
Before SL basket, said guided mechanism is guided by the guiding function of the desired the storage space, wherein the mobile device is horizontally moved to a desired the storage space, that the lift function is moved vertically downward, The supported function is supported by the horizontal support function of the desired storage space, and is supported and fixed to the desired storage space .

A radioactive substance storage chamber according to a second invention for solving the above-mentioned problems is as follows.
In the radioactive substance storage chamber described in the first invention,
The moving device has at least one pair of first rails installed on the floor surface of the passage and a pair of second rails that move horizontally on the first rail and are perpendicular to the first rail on the upper surface. And a second carriage that moves horizontally on the second rail and has a lift function for loading the basket and moving the basket in a vertical direction.
A plurality of storage spaces are provided along the first rail, the guide function for guiding the guided function, the horizontal support function for supporting the supported function, and the same direction and height as the second rail. A pair of third rails provided on the outer side of the third rail, and a vertical support function for supporting the bottom of the basket at a position higher than the third rail,
The basket loaded in the lift function is moved horizontally to the front of the desired storage space by moving the first carriage on the first rail, and the second carriage is on the second rail. By moving on the third rail, it is moved to the desired storage space, and the lift function is moved vertically downward to be supported by the horizontal support function and the vertical support function of the desired storage space. And it is fixed to the desired storage space .

A radioactive substance storage chamber according to a third aspect of the present invention for solving the above-described problem is provided.
In the radioactive substance storage chamber according to the first or second invention ,
The supported function and the horizontal support function have a support structure including an insertion hole and a guide pin.

  According to the present invention, the necessary space of the radioactive substance storage room can be made as small as possible. As a result, the building of the radioactive substance storage room can be made smaller and the construction cost can be reduced.

The storage chamber of the radioactive substance (fuel assembly) according to the present invention and the storage chamber of the radioactive substance (fuel assembly) as a reference example of the present invention will be described in detail with reference to FIGS. Here, a description will be given using a fuel assembly as an example of a radioactive substance.

  The fuel assembly, which is one of the radioactive materials, may be uranium fuel, but may be MOX fuel (mixed oxide fuel, mixed-oxide) regenerated from plutonium extracted from spent uranium, or radioactive waste. .

FIG. 1 is a perspective view showing an example of a basket used in a storage chamber for a radioactive substance (fuel assembly) according to the present invention.
As shown in FIG. 1, a basket 1 for housing a fuel assembly is composed of a rectangular parallelepiped box-shaped box member 2 having a bottom plate, and a box member 2 having a square section made of stainless steel is divided into four parts by two partition plates 3. The container 4 is divided and provided with the accommodating portions 4 having four square cross sections. The fuel assemblies can be efficiently transported in a short time by inserting the fuel assemblies into the storage portions 4 and storing them. Further, the fuel assembly can be protected by the basket 1 during transportation and storage. The same applies to a basket 61 shown in FIG.

  Guide bars 5a and 5b (guided functions) having L-shaped cross sections used when the basket 1 is horizontally moved are provided in parallel with each other at the center portion of the opposing outer surface on one side of the basket 1. The guide bars 5a and 5b are moved by the guide rails 28 and 16 (guide function) positioned between the guide bars 5a and 5b when the basket 1 is horizontally moved by a horizontal movement device 21 (moving carriage 24) described later. 1 is for guiding to a predetermined position (storage space 15 described later). Further, a supported member 6 (supported function) used when fixing the basket 1 is provided in an upper portion of the opposite outer surface of the other side of the basket 1, and an insertion hole provided in the supported member 6. The horizontal position of the basket 1 is fixed to 6a through a guide pin 17a of a support member 17 (support function) described later. That is, the horizontal position of the basket 1 is supported and fixed by the pin-hole support structure of the insertion hole 6a and the guide pin 17a. The supported member 6 and the supporting member 17 are not limited to the pin-hole supporting structure as long as they have a horizontal position supporting function.

  Although the partition plate 3 is illustrated in a simplified manner in FIG. 1, the partition plate 3 has an appropriate thickness and gap so that the fuel assemblies accommodated in the accommodating portion 4 maintain a predetermined interval. is there. Moreover, as a constituent material of the box member 2 and the partition plate 3, not only stainless steel but also stainless steel to which boron (B) for neutron absorption is added or other metal materials may be used. Further, in FIG. 1, a basket for storing four fuel assemblies for PWR (Pressurized Water Light Water Reactor) is shown, but a basket for storing fuel assemblies for BWR (Boiling Water Light Water Reactor) may be used. In that case, 16 fuel assemblies are accommodated in one basket. The same applies to a basket 61 shown in FIG.

  Next, the storage chamber of the radioactive substance (fuel assembly) according to the present invention will be described with reference to FIGS. Here, FIG. 2 is a top view of the storage chamber of the radioactive substance (fuel assembly) according to the present invention, FIG. 3 is a view taken along line AA in FIG. 2, and FIG. 3 is a detailed view of FIG. 3, and FIG. 5 is a view for explaining the movement of the basket 1.

  As shown in FIGS. 2 to 4, the fuel assembly storage chamber 10 according to the present invention is entirely surrounded by a concrete wall 11 having a predetermined thickness. The storage chamber 10 is provided with a plurality of loading / unloading ports 12 for loading and unloading the basket 1 described above, and the loading / unloading door 10a (see FIG. 6), which will be described later, is opened only when the basket 1 is loaded / unloaded. It is supposed to be.

  The interior of the storage chamber 10 is separated into a plurality of spaces by the separation wall 13, and a pair of long Y-direction rails 20 (the first rails) for horizontally moving the basket 1 on the floor surface of the passage 14 of each space. Rail) is laid and can be moved into and out of the storage chamber 10 via the carry-in / out entrance 12. A plurality of storage spaces 15 for storing the basket 1 are arranged on both sides of the Y-direction rail 20 along the Y-direction rail 20. The separation wall 13 is not limited to the separation structure and the wall as long as it has a support function, and the space inside the storage chamber 10 is not limited to a plurality. Further, the plurality of Y-direction rails 20 laid inside the storage chamber 10 are not limited to being installed independently of each other. That is, the Y-direction rails may be connected to each other by the installation of the X-direction rails substantially orthogonal to the Y-direction rails, and the X-direction rails are connected to either or both of the back and front of the passage without the storage space 15. It may be installed at either or both of the positions penetrating the inside of the storage space 15.

  The storage space 15 is provided on the inner wall surface of the storage space 15, guides the guide bars 5 a and 5 b of the basket 1, and guides the basket 1 to the storage space 15. A support member 17 (horizontal support function) having a pin support member 17b provided on the wall surface and a guide pin 17a erected on the pin support member 17b is provided, and the guide pin 17a is inserted into the insertion hole 6a. Thus, the basket 1 is supported and fixed in the storage position. The guide rail 16 is arranged in the same direction and the same height as a guide rail 28 on the horizontal movement device 21 side described later.

  The storage spaces 15 are arranged at a distance that can ensure the subcriticality of the fuel assembly. In the conventional vertical loading method, in order to reduce radiation leakage from the pit lid, a distance between pits larger than the subcritical collateral distance is necessary. The criticality guarantee distance is short, and this increases the number of baskets 1 that can be arranged per unit area, thereby saving space.

  A support base 18 (vertical support function) having a predetermined height and supporting the bottom of the basket 1 is provided at both end portions of the bottom of the storage space 15, and the storage space 15 between the support bases 18 is provided. A pair of short X-direction rails 27 (third rails) are provided at the bottom of each. The position of the X-direction rail 27 is the same height as the X-direction rail 26 on the horizontal moving device 21 side described later, but is disposed at a position lower than the upper surface of the support base 18.

  A plurality of support columns 19 are erected on the front surface of the storage space 15, that is, on the Y direction rail 20 side of the storage space 15, and an upper guide rail 29 extending in the Y direction is provided above the support column 19. It is provided so as to face each other. The opposing upper guide rail 29 is arranged perpendicular to the support column 19, that is, so that the head of the upper guide rail 29 faces in the horizontal direction, and will be described later on the head and side portions of the upper guide rail 29. Guide rollers 30 and 31 are in contact with each other to guide the movement of the horizontal movement device 21 and support the horizontal movement device 21 so as not to fall down.

  A horizontal moving device 21 (moving device) that horizontally moves the basket 1 is disposed on the Y-direction rail 20. Therefore, the horizontal movement device 21 used in the storage chamber for the radioactive substance (fuel assembly) according to the present invention will be described with reference to FIGS. FIG. 4A corresponds to the view taken along the line BB in FIG.

  As shown in FIGS. 3 and 4, the horizontal moving device 21 horizontally moves on the Y-direction rail 20 across the Y-direction rail 20, and has a pair of short lengths perpendicular to the Y-direction rail 20 on the upper surface. The transport carriage 22 (first carriage) having the X direction rail 26 (second rail) and the X direction rail 26 are horizontally moved on the X direction rail 26 and the basket 1 is loaded on the upper surface thereof. A moving carriage 24 (second carriage) having a lifter 25 (lift function) for moving the basket 1 in the vertical direction is provided.

  Further, the horizontal moving device 21 is provided on the transport carriage 22 and includes the basket 1, the moving carriage 24, and the lifter 25. A guide rail 28 arranged in the same direction and at the same height as the guide rail 16 on the space 15 side, and two guides provided on the upper end portion of the support grid member 23, and in contact with the head of the upper guide rail 29 Similarly, the roll 30 and the guide roll 31 are provided on the upper end portion of the support grid member 23 with two surfaces on each side via the support tool 31a and in contact with the side portion of the upper guide rail 29 from the vertically lower side. is there.

  The X-direction rail 26 on the transport carriage 22 side is arranged at the same height as the X-direction rail 27 on the storage space 15 side, but between the X-direction rail 26 and the X-direction rail 27, A gap that does not hinder movement in the X direction (X direction rail 26 ← → X direction rail 27) is provided, and movement of the transport carriage 22 in the Y direction is not hindered. The guide rail 28 on the transport carriage 22 side is also arranged at the same height as the guide rail 16 on the storage space 15 side, but between the guide rail 16 and the guide rail 28, the guide bar 5a of the basket 1 is disposed. 5b is provided so as to guide the movement in the X direction (guide rail 16 ← → guide rail 28), and the movement of the transport carriage 22 in the Y direction is not hindered as described above.

  Next, the installation method to the storage space 15 of the basket 1 is demonstrated using FIG. Here, FIG. 5 (a) shows a state in which the transport carriage 22 of the horizontal movement device 21 moves horizontally on the rail 20 with the basket loaded, and FIG. 5 (b) moves with the basket loaded. FIG. 5 (c) shows a state where the carriage 24 is horizontally moved from the X-direction rail 26 of the horizontal movement device 21 to the X-direction rail 27 of the storage space 15, and FIG. 2 shows a state in which the basket 1 is installed on the support base 18 of the storage space 15.

  When the basket 1 is stored in the desired storage space 15, first, the transport carriage 22 of the horizontal movement device 21 on which the basket 1 is loaded horizontally moves to the front surface of the desired storage space 15 (see FIG. 5A). At this time, the lifter 25 is in a state where the basket 1 is lifted up. Next, after horizontally moving to the front surface of the desired storage space 15, the horizontal carriage 21 of the horizontal movement device 21 moves horizontally on the X direction rail 26 and the X direction rail 27 while the basket 1 is loaded. , And move horizontally to the desired storage space 15 position. Also at this time, the lifter 25 is in a state in which the basket 1 is lifted up (see reference numerals 1a and 25a and FIG. 5B in FIG. 4B), and the movable carriage 24 and the lifter 25 are outside the X-direction rail 27. The space portion formed by the two support bases 18 provided in the horizontal movement is moved horizontally. Finally, the lifter 25 lifts down the basket 1 (see reference numerals 1b and 25b in FIG. 4B and FIG. 5C), and places the basket 1 in the recess of the support base 18 higher than the position of the X-direction rail 27. After loading, the storage of the basket 1 in the desired storage space 15 is completed. At this time, the supported member 6 is supported by the support member 17 on the storage space 15 side and is fixed at that position. In addition, when taking out the basket 1 from the storage space 15, a procedure reverse to the above procedure is performed.

  As described above, in this embodiment, the basket 1 is horizontally moved by the horizontal movement device 21 and stored in the storage space 15, so that the basket 1 is moved in the height direction as in the conventional vertical storage system. There is no need to move, and space in the height direction can be saved.

FIG. 6 is a view showing the surrounding facilities including the storage chamber for the radioactive material (fuel assembly) according to the present invention.
As described above, the basket 1 containing a plurality of fuel assemblies is horizontally moved in the storage chamber 10 using the horizontal movement device 21, and is carried into and out of the storage chamber 10. At the same time, the carry-in / out door 10a is opened, and the horizontal movement device 21 is used to move horizontally. The basket 1 carried out of the storage room 10 is shipped and inspected, and then lifted by the overhead crane 43 and inserted into the cask 41 installed on the lid mounting device 42 of the packing room 40 together with the basket 1. Is done. As described above, the basket 1 for storing the fuel assembly is used for moving and storing the fuel assembly, and can also be used for transportation together with the cask 41. Although the basket 1 is loaded in the cask 41 from the vertical direction, since the fuel assembly is accommodated in the basket 1, the basket 1 can be loaded in the cask 41 from the horizontal direction.

  After the plurality of baskets 1 are inserted into the cask 41, a lid is attached to the cask 41, lifted by the overhead crane 43 again, moved to the cask operation room 50, and installed on the cask rollover device 51 ( Reference numeral 51a in the figure. The cask 41 erected on the cask rollover device 51 is rolled over by the cask rollover device 51 (reference numeral 51b in the figure) and temporarily stored in a horizontal state until shipped.

Reference example

FIG. 7 is a perspective view showing another example of the basket used in the storage chamber for the radioactive substance (fuel assembly) of this reference example .
As shown in FIG. 7, the basket 61 that accommodates the fuel assembly includes a rectangular box-shaped box member 62 having a bottom plate, and the box member 62 having a square section made of stainless steel is divided into four by the two partition plates 63. Divided into four accommodating sections 64 having a square cross section, the fuel assemblies are respectively inserted into the accommodating sections 64.

  A plurality of guide rollers 65 (first guide rollers) each having a roller are erected vertically at the upper end of each outer surface of the basket 1. Further, below the guide roller 65, a support tool 66a is erected perpendicularly to each outer surface, and the guide roller 66 (second guide roller) supports so that the rotation surface of the roller is parallel to each outer surface. It is provided perpendicular to the tool 66a. The guide rollers 65 and 66 (first guided function) are configured such that the guide roller 65 is in horizontal contact with the head of the guide rail 85 (first guide function, first guide rail) in the horizontal direction. This guides the movement and prevents the basket 1 from overturning in the direction perpendicular to the outer surface. The guide roller 66 is in contact with the side of the same guide rail 85 from the vertically lower side to guide the horizontal movement of the basket 1. At the same time, it prevents overturning in a direction parallel to the outer surface of the basket 1. In order to effectively prevent overturning, it is desirable to provide at least two guide rollers 65 and 66 on each outer surface.

Next, another example of the radioactive substance (fuel assembly) storage chamber according to the present reference example will be described with reference to FIGS. Here, FIG. 8 is a top view of the storage chamber of the radioactive substance (fuel assembly) of this reference example , FIG. 9 is a view taken along the line CC of FIG. 8, and FIG. FIG. 10 is a detailed view of FIG. 9.

As shown in FIGS. 8 and 9, the radioactive substance (fuel assembly) storage chamber 70 of the present reference example is entirely surrounded by a concrete wall 71 having a predetermined thickness. The storage chamber 70 is provided with a loading / unloading port 72 for loading and unloading the basket 61 described above. Only when the basket 61 is loaded / unloaded, the loading / unloading door 70a (see FIG. 11) described later is opened. It has become.

  Inside the storage chamber 70, a plurality of loop-shaped storage spaces 73 are formed by a plurality of conveyors 80, and the periphery of the storage space 73 is surrounded by a separation wall 74. The conveyor 80 serves as a passage for horizontally moving the basket 61 and also serves as a storage space for storing the basket 61. By making the conveyor 80 into a loop shape, the stored basket 61 can be carried in and out in a first-in first-out manner. The carry-in and carry-out may be different conveyors 80. If the first-in first-out method is not used, the conveyor 80 is not looped. For example, a plurality of conveyors are arranged in a straight line, and the first-in first-out method is used for loading and unloading. The carry-in and carry-out may be different conveyors 80. The separation wall 74 is not limited to the separation structure and the wall as long as it has a support function.

  The basket 61 shown in FIG. 7 is loaded on a plurality of rectangular parallelepiped loading platforms 81 installed on the conveyor 80 and horizontally moved on the conveyor 80. In the vicinity of the conveyor 80, a pair of guide rails 83 (second guide function, second guide rail) are provided along the direction of installation of the conveyor 80 with the conveyor 80 interposed therebetween. A plurality of guide rollers 82 (second guided function, third guide roller) standing vertically are in contact with the guide rail 83 in the horizontal direction and guided in the horizontal direction along the guide rail 83. Further, on each outer surface of the loading table 81, a stopper 84 (stopper function) made up of a plurality of rod-shaped members having a predetermined length is provided upright, and adjacent loading tables 81, that is, adjacent baskets 61 are arranged. They maintain a distance that can guarantee the subcriticality of the fuel assembly. Compared with the distance between pits in the conventional vertical loading method, this subcritical collateral distance is short, and this increases the number of baskets 61 that can be arranged per unit area, thereby saving space. .

  Further, a pair of guide rails 85 (first guide function, first guide rail) are also provided on the ceiling portion of the storage space 73 facing the conveyor 80 via the ceiling member 86 along the installation direction of the conveyor 80. Is provided. The pair of guide rails 85 are arranged such that their heads are horizontally oriented with the basket 61 interposed therebetween, and a guide roller 65 provided on the upper portion of the basket 61 is horizontally oriented on the head of the guide rail 85. The horizontal movement of the basket 61 is guided in contact therewith. The guide roller 66 provided on the upper portion of the basket 61 is in contact with the side portion of the guide rail 85 from the vertically lower side to guide the horizontal movement of the basket 61. Thus, by providing at least two horizontal guide rollers 65 and at least two vertical guide rollers 66 on each outer surface of the basket 61, the basket 61 can be moved horizontally using the guide rail 85. And preventing the basket 61 from overturning.

As described above, in this reference example , the basket 61 is guided by the guide rail 85, and the loading table 81 on which the basket 61 is loaded is guided by the guide rail 83, so that the conveyor 80 does not cause the basket 61 to fall down. Can be moved. Further, since the distance between the adjacent baskets 61 is kept at a predetermined interval by the stopper 84 of the loading table 81 and stored on the conveyor 80 which is a passage, the basket 61 can be raised as in the conventional vertical storage system. It is not necessary to move in the vertical direction, and space can be saved in the height direction and the horizontal direction.

FIG. 11 is a view showing the surrounding facilities including the storage room for the radioactive material (fuel assembly) of this reference example .
As described above, the basket 61 that accommodates a plurality of fuel assemblies is horizontally moved in the storage chamber 70 using the conveyor 80 and the loading platform 81, and is carried into and out of the storage chamber 70. Also when carrying out, the carry-in / out door 70a is opened and the conveyor 80 and the loading platform 81 are used to move horizontally. The basket 61 carried out of the storage room 70 is inspected after shipment, and then lifted by the overhead crane 93 and inserted together with the basket 61 into the cask 91 installed on the lid mounting device 92 of the packing room 90. Is done. Thus, the basket 61 for storing the fuel assembly is used for moving and storing the fuel assembly, and can be used for transportation together with the cask 91.

  After the plurality of baskets 61 are inserted into the cask 91, a lid is attached to the cask 91, and the cask 91 is again lifted by the overhead crane 93, moved to the cask operation chamber 100, and installed on the cask rollover device 101 ( 101a). The cask 91 erected on the cask rollover device 101 is rolled over by the cask rollover device 101 (101b in the figure) and temporarily stored in a horizontal state until shipped.

  In the radioactive substance storage chamber according to the present invention, uranium fuel, MOX fuel, radioactive waste and the like are suitable as the radioactive substance.

It is a perspective view which shows the basket used in the storage chamber of the radioactive substance which concerns on this invention. It is a top view of the storage chamber of the radioactive substance which concerns on this invention. It is an AA arrow directional view of FIG. It is a figure which shows the storage chamber of the radioactive substance which concerns on this invention in detail, (a) is a top view, (b) is a side view. It is a figure explaining operation | movement of the trolley | bogie used in the storage chamber of the radioactive substance which concerns on this invention. It is the figure which showed the surrounding facilities including the storage room of the radioactive substance which concerns on this invention. It is a perspective view which shows another example of the basket used in the storage chamber of the radioactive substance used as the reference example of this invention. It is a top view which shows another example of the storage chamber of the radioactive substance used as the reference example of this invention. It is CC line arrow directional view of FIG. It is a figure which shows the storage chamber of the radioactive substance used as the reference example of this invention in detail, (a) is a top view, (b) is a side view. It is the figure which showed the surrounding facilities including the storage room of the radioactive substance used as the reference example of this invention.

DESCRIPTION OF SYMBOLS 1 Basket 5a, 5b Guide bar 6 Supported member 10 Storage chamber 14 Passage 15 Storage space 16 Guide rail 17 Support member 20 Y direction rail 22 Carriage carriage 24 Moving carriage 25 Lift 26 X direction rail 27 X direction rail 61 Basket 65 Guide roller 66 Guide roller 70 Storage room 73 Storage space 80 Conveyor 81 Loading platform

Claims (3)

A basket that has a guided function used for guidance at the time of guidance on one of the opposing outer surfaces, has a supported function supported at the time of fixing on the other outer surface, and contains a plurality of radioactive substances;
At least one passage through which the basket is moved horizontally;
A storage space that is provided in a plurality along the passage, has a guide function for guiding the guided function, and a horizontal support function for supporting the supported function, and stores the basket;
A moving device having a lift function for moving the basket in the vertical direction while horizontally moving the passage;
Before SL basket, said guided mechanism is guided by the guiding function of the desired the storage space, wherein the mobile device is horizontally moved to a desired the storage space, that the lift function is moved vertically downward, A radioactive substance storage chamber , wherein the supported function is supported by the horizontal support function of the desired storage space, and is supported and fixed in the desired storage space . The radioactive substance storage chamber according to claim 1,
The moving device has at least one pair of first rails installed on the floor surface of the passage and a pair of second rails that move horizontally on the first rail and are perpendicular to the first rail on the upper surface. And a second carriage that moves horizontally on the second rail and has a lift function for loading the basket and moving the basket in a vertical direction.
A plurality of storage spaces are provided along the first rail, the guide function for guiding the guided function, the horizontal support function for supporting the supported function, and the same direction and height as the second rail. A pair of third rails provided on the outer side of the third rail, and a vertical support function for supporting the bottom of the basket at a position higher than the third rail,
The basket loaded in the lift function is moved horizontally to the front of the desired storage space by moving the first carriage on the first rail, and the second carriage is on the second rail. By moving on the third rail, it is moved to the desired storage space, and the lift function is moved vertically downward to be supported by the horizontal support function and the vertical support function of the desired storage space. A radioactive substance storage chamber fixed to the desired storage space . In the radioactive substance storage chamber according to claim 1 or 2 ,
A radioactive substance storage chamber, wherein the supported function and the horizontal support function are a support structure including an insertion hole and a guide pin.

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