JP7025271B2 - Storage container and aggregate - Google Patents

Description

The present disclosure relates to a storage container for storing a cask and an aggregate in which the storage container is integrated.

Conventionally, there is a cask for storing spent nuclear fuel aggregates. Patent Document 1 discloses a storage container capable of storing such a cask.

Japanese Unexamined Patent Publication No. 2016-21856

The storage container shown in Patent Document 1 includes a base for supporting a tubular body for storing a cask inside. Here, if the cask is a spent nuclear fuel assembly, the storage container becomes large. In addition, the storage container is made of concrete in consideration of the properties of the spent nuclear fuel assembly and the like. Therefore, if the base is an individual, the weight of the base becomes large, and it may be difficult to lift the base depending on the capacity of the crane when assembling the storage container.

Therefore, it is an object of the present disclosure to provide a storage container and an aggregate which are advantageous for weight reduction.

The storage container according to one aspect of the present disclosure is a storage container for storing a cask, and supports a hexagonal columnar tubular body for accommodating the cask inside and a tubular body arranged below the tubular body. A base is provided, and the base is provided with six block bodies separated in the circumferential direction and a connecting member for connecting the six block bodies.

Further, in the above-mentioned storage container, each of the six block bodies may be arranged at the lower part of the inner angle portion of the hexagonal columnar tubular body. Each of the six block bodies may include an upper surface that partially faces the space inside the tubular body and a bottom surface that is opposite to the upper surface. Of the six block bodies, the distance between the block bodies facing each other in the circumferential direction may be constant, or may be widened from the outer surface side to the inner side surface side of the block bodies. The connecting member may include six connecting bodies that connect the blocks facing each other in the circumferential direction out of the six blocking bodies in the circumferential direction. The vertical length of the six connections may be shorter than the vertical length of the six blocks. The six connected bodies may be included in the projected region of the cylindrical body in a vertical direction. The connecting member may include six arms extending radially, each of which may be attached to the upper surface of each of the six blocks. The arm portion and the block body may be attached via a plate body. The arm may be connected to another arm. The connecting member may include an auxiliary connecting member that connects two arms adjacent to each other in the circumferential direction. The arm portion may extend from the connection position of the auxiliary connecting member to the outer peripheral side. The storage container may be supported on the side of the base and include a plate-shaped member on which the cask is placed.

Further, the aggregate according to one aspect of the present disclosure includes a first storage container for storing the first cask, a second storage container for storing the second cask, and a third storage container for storing the third cask. The first storage container, the second storage container, and the third storage container are the above-mentioned storage containers, respectively, and are the tubular body included in the first storage container, the tubular body included in the second storage container, and the first storage container. Each of the tubular bodies included in the three storage containers faces the other two tubular bodies and is arranged in a honeycomb shape.

According to the present disclosure, it is possible to provide a storage container and an aggregate which are advantageous for weight reduction.

It is a perspective view which shows the structure of the storage container which concerns on 1st Embodiment of this disclosure. FIG. 3 is a cross-sectional view of a storage container corresponding to the cross section II-II of FIG. It is an exploded view which shows the structure of the storage container which concerns on 1st Embodiment of this disclosure. It is a perspective view which shows the structure of a base. It is a top view which shows the structure of a base. It is sectional drawing which shows the structure of the storage container which concerns on 2nd Embodiment of this disclosure. It is a perspective view which shows the structure of the storage container which concerns on 3rd Embodiment of this disclosure. It is a perspective view which shows the structure of the base in 3rd Embodiment. It is a perspective view which shows the structure of the aggregate which concerns on one Embodiment of this disclosure.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Here, the dimensions, materials, and other specific numerical values shown in each embodiment are merely examples, and the present disclosure is not limited unless otherwise specified. Further, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate explanations, and elements not directly related to the present disclosure are omitted from the illustration. Further, in each of the following figures, the Z axis is taken in the vertical direction, and the X axis and the Y axis are taken in the direction perpendicular to the X axis in the plane perpendicular to the Z axis.

(First Embodiment)
First, the storage container 10 according to the first embodiment will be described. FIG. 1 is a perspective view showing the configuration of the storage container 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the storage container 10 in the vertical direction. The storage container 10 stores the cask C.

Cask C is, for example, a metal dry cask that houses a spent nuclear fuel assembly. Here, the spent nuclear fuel aggregate means an aggregate in which a plurality of spent nuclear fuel rods that have completed the reaction in the nuclear reactor are connected. In each figure, the outer shape of the cask C accommodating the spent nuclear fuel assembly is roughly shown by a cylinder having a total length LC and an outer diameter DC.

The storage container 10 according to the present embodiment has a substantially hexagonal columnar outer shape centered on the vertical axis AX as a whole. The storage container 10 vertically stores the cask C in the storage space S1 formed inside the storage container 10. In each figure, the outer shape of the storage container 10 is shown by a total length L1 and a substantially hexagonal prism having a width across flats W1 and a diagonal distance W2, which are hexagonal dimensions on a horizontal plane.

The storage container 10 containing the cask C is installed on, for example, an outdoor ground. Since the storage container 10 has a substantially hexagonal columnar shape, when the storage container 10 is installed on the ground, a plurality of storage containers 10 can be placed close to each other or fastened to each other in a so-called honeycomb structure.

The storage container 10 includes a tubular body 12, a lid body 14, and a base 16. Here, there is a concern that a small amount of radiation such as neutron rays may leak from the spent nuclear fuel aggregate in Cask C. However, short-term exposure to trace radiation leaks is not a problem. However, since the area around Cask C may be exposed for a long period of time, the material of the container for storing Cask C may be concrete. Therefore, in the present embodiment, the main material constituting the tubular body 12, the lid body 14, and the base 16 is concrete. Since the storage container 10 is made of concrete as a whole, it is also referred to as a concrete overpack (COP).

The tubular body 12 is a hexagonal cylinder whose inner space is the storage space S1. The tubular body 12 has an outer surface 12a composed of six side surfaces of a hexagonal prism and a cylindrical inner surface 12b. In each figure, the shape of the storage space S1 is shown by a cylinder having a total length L2 and an inner diameter D2. The total length L2 of the tubular body 12 corresponds to the total length of the storage space S1. Assuming that the cask C is arranged coaxially with the tubular body 12 in the storage space S1, there is a gap space G between the outer wall surface of the cask C and the inner side surface 12b of the tubular body 12. Occurs.

Further, the tubular body 12 has a groove portion 12c extending in the vertical direction at the central portion in the horizontal direction on each of the six side surfaces constituting the outer surface 12a. When a plurality of storage containers 10 are integrated and arranged in a honeycomb structure as described above, the groove portion 12c can be an air flow path by facing each other between adjacent storage containers 10. That is, when the storage containers 10 are integrated and arranged in the honeycomb structure, the groove portion 12c faces the groove portion 12c provided on the side surface of another storage container 10 facing each other.

The lid 14 is a flat plate that covers the opening in the upper part of the tubular body 12 in the vertical direction. The planar shape of the lid 14 is a hexagon that matches the outer surface 12a of the tubular body 12. The lid 14 is attached to the upper part of the tubular body 12 by a bolt or the like (not shown).

Further, the lid body 14 has a plurality of discharge ports 14a for discharging the air flowing through the storage space S1 to the outside of the storage container 10. The discharge port 14a of the present embodiment is a notch portion vertically cut out at the central portion in the horizontal direction on the six side surfaces of the lid body 14, respectively. Further, the upper end of the tubular body 12 may have a notch portion 12d continuous with the discharge port 14a of the lid body 14. The discharge port 14a is not formed of such a notch, but may be formed of a through hole penetrating along the vertical direction in the vicinity of the outer peripheral portion of the lid 14. Alternatively, instead of providing the discharge port 14a on the lid body 14, only a discharge port such as a notch formed at the upper end portion of the tubular body 12 may be present.

Further, when the discharge port 14a and the notch portion 12d are provided at the positions exemplified above, the plurality of groove portions 12c formed on the outer surface 12a of the tubular body 12 have the discharge port 14a and the notch portion, respectively. It may be continuous with 12d. This facilitates the formation of an air flow path between the outside of the storage container 10 and the storage space S1.

The base 16 is a member that is arranged below the tubular body 12 and supports the tubular body 12. The tubular body 12 is attached to the upper surface of the base 16 by means of bolts or the like (not shown), that is, to the upper surfaces 161a to 166a of each block body described later. The configuration of the base 16 will be described in detail below.

FIG. 3 is an exploded view of the storage container 10. The cask C stored in the storage container 10 is large. The material of the storage container 10 is concrete. Therefore, if the tubular body 12, the lid body 14, or the base 16 is formed by one individual, the weight of each is increased. As a result, for example, when assembling the storage container 10, it may not be possible to lift each member such as the tubular body 12 depending on the capacity of the crane at the site. Therefore, as shown in FIG. 3, the tubular body 12, the lid body 14, and the base 16 may each be further composed of a combination of a plurality of members.

For example, the tubular body 12 may be composed of a plurality of layers laminated in the vertical direction. In the present embodiment, the tubular body 12 is composed of four layers: a first layer 121, a second layer 122, a third layer 123, and a fourth layer 124. Further, each layer such as the first layer 121 may be a combination of a plurality of members divided along the vertical direction. In the present embodiment, the first layer 121 is divided into two equal parts, a first member 121a and a second member 121b. Similarly, the second layer 122 is bisected into a third member 122a and a fourth member 122b. The third layer 123 is divided into two equal parts, a fifth member 123a and a sixth member 123b. The fourth layer 124 is divided into two equal parts, a seventh member 124a and an eighth member 124b. That is, the tubular body 12 is composed of a total of eight members from the first member 121a to the eighth member 124b. Each layer such as the first layer 121 and each member such as the first member 121a and the second member 121b are connected by bolts or the like.

In this case, as shown in FIG. 3, the connecting positions of the two members in each layer such as the first layer 121 are separated from each other by 60 ° with respect to the vertical axis AX of the substantially hexagonal prism. It may be combined. As a result, the strength of the storage container 10 can be made uniform without being affected by the joint position. Further, the arrangement is not limited to 60 ° for each layer, and may be an arrangement in which the connecting positions of adjacent members in the vertical direction do not overlap in the circumferential direction.

Further, the lid body 14 may be a combination of a plurality of members divided along the vertical direction. In the present embodiment, the lid 14 is bisected into a first flat plate 141 and a second flat plate 142. The flat plates of the first flat plate 141 and the second flat plate 142 are connected to each other by bolts or the like.

Further, the base 16 may have the following configuration.

FIG. 4 is a perspective view showing the configuration of the base 16. FIG. 5 is a plan view showing the configuration of the base 16. Note that, in FIGS. 4 and 5, only the base 16 is shown, and the cylindrical body 12 or the like supported on the base 16 is not shown. Further, in FIG. 5, the region where the cask C is placed and the position of the inner side surface 12b of the cylindrical body 12 are represented by circles of two-dot chain lines, respectively. That is, in this embodiment, both the tubular body 12 and the cask C are placed on the base 16.

The base 16 includes six block bodies separated in the circumferential direction and a connecting member connecting the six block bodies. The six block bodies are the first block body 161, the second block body 162, the third block body 163, the fourth block body 164, the fifth block body 165, and the sixth block body 166. Hereinafter, what is simply referred to as "block body" indicates these six block bodies. On the other hand, the connecting member in the present embodiment includes six connecting bodies that connect the blocks facing each other in the circumferential direction out of the six blocking bodies in the circumferential direction. The six connecting bodies are the first connecting body 18a, the second connecting body 18b, the third connecting body 18c, the fourth connecting body 18d, the fifth connecting body 18e, and the sixth connecting body 18f. Hereinafter, what is simply referred to as "linkage" indicates these six linkages.

First, six block bodies will be described. Each block body is arranged radially around one vertical axis. Here, one vertical axis can be identified with the vertical axis AX, which is a reference for the hexagonal shape of the cylindrical body 12. However, the vertical axis referred to here does not exactly coincide with the vertical axis AX, and may have some deviation from each other.

The shape of each block body of the present embodiment is determined so as to satisfy the following conditions. However, it is possible to achieve the object of this disclosure without satisfying all the conditions.

As the first condition, the shape of each block body is substantially the same. According to the first condition, when manufacturing the base 16, only one kind of block body needs to be prepared.

As a second condition, a part of each block body is in the projection area of the cask C housed in the storage space S1 in the vertical direction. Referring to FIG. 5, the area where Cask C is placed corresponds to the projection area here. According to the second condition, at least a part of each block body is located below the cask C stored in the storage space S1, so that the base 16 sets the weight of the cask C to each block. You can receive it while distributing it to your body.

As a third condition, each block body includes upper surfaces 161a to 166a partially facing the storage space S1 in which the cask C is housed, and bottom surfaces 161b to 166b on the opposite side of the upper surfaces 161a to 166a. Regarding the bottom surfaces 161b to 166b, only the bottom surfaces 162b to 164b are clearly shown in FIG. In the upper surfaces 161a to 166a, a part facing the storage space S1 means a region inside the position of the inner side surface 12b of the tubular body 12. The upper surfaces 161a to 166a each support the cylindrical body 12 by surface contact and receive the weight of the cask C, so that it is desirable that the upper surfaces are horizontal. Further, since the storage container 10 is installed on the ground outdoors, for example, the bottom surfaces 161b to 166b are also horizontal planes, respectively.

As a fourth condition, each block body does not have an opening that can be an air passage or a groove that can be a human passage in some cases. According to the fourth condition, each block body has a simple shape because it does not have an opening or a groove, which is advantageous in terms of ease of manufacturing.

As a fifth condition, the blocks do not come into contact with each other. According to the fifth condition, instead of each block body having no opening or the like in the fourth condition, in the base 16, the first distribution space S2 and the second distribution formed between the block bodies are formed. The space S3 serves as an air passage or a human passage. Here, the first distribution space S2 is a space formed between the blocks facing each other in the circumferential direction. The second distribution space S3 is a space formed in the central portion of the base 16 with the blocks facing each other with respect to the vertical axis AX.

As a sixth condition, the outer surface of each block body fits a part of the hexagonal shape of the cylindrical body 12. For example, the first block body 161 includes a first outer surface 161c and a second outer surface 161d. The dimensions of the hexagon in the base 16 are the width across flats W1 and the diagonal distance W2 in accordance with the hexagonal shape of the tubular body 12. That is, the corner portion of the hexagonal tubular body 12 is placed on the block body at a position in the circumferential direction between the two side surfaces facing the adjacent block body.

As a seventh condition, each block body is arranged at the lower part of the inner angle portion of the hexagonal columnar tubular body 12. For example, with respect to the first block body 161, the first block body 161 includes an internal angle portion of 120 ° formed by the first outer surface 161c and the second outer surface 161d. Further, regarding the second block body 162, the inner angle portion of 120 ° formed by the first outer surface 162c and the second outer surface 162d is included in the second block body 162. That is, the first outer surface 161c of the first block body 161 and the second outer surface 162d of the second block body 162 are aligned on the same plane in which one of the outer surfaces 12a of the tubular body 12 exists.

Here, when each of the above conditions is satisfied, the blocks facing each other in the circumferential direction are arranged apart by an interval W3 in order to form the first distribution space S2. For example, the first block body 161 includes two side surfaces extending substantially radially about the vertical axis AX, that is, a first side surface 161e and a second side surface 161f. Further, the second block body 162 also includes the first side surface 162e and the second side surface 162f. That is, for example, between the first block body 161 and the second block body 162, the first side surface 161e of the first block body 161 and the second side surface 162f of the second block body 162 are separated by an interval W3. , Facing in parallel.

Further, all six first distribution spaces S2 of the present embodiment are on any straight line toward the vertical axis AX. In the present embodiment, the first distribution space S2 formed between the first block body 161 and the second block body 162, and the first formed between the fourth block body 164 and the fifth block body 165. The distribution space S2 faces the vertical axis AX as a reference. That is, the first distribution spaces S2 facing each other with respect to the vertical axis AX are lined up on the same straight line passing through the vertical axis AX.

Further, in the present embodiment, each block body includes 161 g to 166 g of the inner side surface facing the vertical axis AX, respectively. The inner surface of a certain block body is separated from the inner surface of another block body while facing the inner surface of another block body with reference to the vertical axis AX. As a result, a second distribution space S3 surrounded in the circumferential direction by the six block bodies and the six connecting bodies is formed in the central portion of the base 16. All the first distribution spaces S2 communicate with the second distribution space S3. Since each block body contains 161 g to 166 g of the inner side surface, the second distribution space S3 can be made larger.

Therefore, in the present embodiment, the planar shape of one block body included in the base 16 is a pentagon. Referring to FIG. 5, for example, the first block body 161 has five side surfaces of a first outer surface 161c, a second outer surface 161d, a first side surface 161e, a second side surface 161f, and an inner side surface 161g.

In the above description, each side surface forming the first distribution space S2, for example, the first side surface 161e of the first block body 161 and the second side surface 162f of the second block body 162 are parallel to each other. did. However, these sides are not necessarily perfectly parallel and may be shaped such that, for example, the spacing W3 extends from the outer side to the inner side. In this case, in the first distribution space S2, the opening area perpendicular to the direction radially extending from the vertical axis AX is larger on the inner side surface side than on the outer side surface side. Therefore, the air that has flowed into the first distribution space S2 from the outside is less likely to stay in the first distribution space S2. Further, these sides do not necessarily have to be composed of one plane. For example, if the opening area of the first distribution space S2 is larger on the inner side surface side than on the outer side surface side, the side surface may be a combination of a plurality of continuous planes. However, in this case, the planar shape of one block body is not strictly a pentagon.

Further, as shown in FIG. 1, the groove width of the groove portion 12c formed in the tubular body 12 may be the same as the spacing W3 of the first distribution space S2. In this case, the groove portion 12c and the first distribution space S2 may communicate with each other. This facilitates the formation of an air flow path between the outside of the storage container 10 and the storage space S1.

Further, as shown in FIG. 2, the vertical length L3 of each block body can be equal to the vertical length of one layer such as the first layer 121 included in the tubular body 12.

Next, the six connectors will be described. Each connecting body is, for example, a flat plate-shaped member made of a steel material. For example, for the first connecting body 18a, one surface of the first connecting body 18a is connected to the first side surface 161e of the first block body 161. On the other hand, the surface of the first connecting body 18a on the opposite side to the surface is connected to the second side surface 162f of the second block body 162. As a result, the first connecting body 18a can connect the first block body 161 and the second block body 162. Although not shown, each connecting body and each block body may be connected by bolts or the like.

A part of each connecting body has the same dimensions as the interval W3 of the first distribution space S2. As a result, the connected bodies are arranged between the block bodies facing each other in the circumferential direction, so that the first distribution space S2 having the interval W3 is formed. That is, by appropriately changing the dimensions of the portion corresponding to the interval W3 of each connected body, the interval W3 of the first distribution space S2, and by extension, the size of the hexagon of the outer shape of the base 16 can be adjusted. can.

Further, as shown in FIG. 2, the length L4 in the vertical direction of each connected body is shorter than the length L3 in the vertical direction of each block body. For example, the length L4 may be about half of the length L3. As a result, the air that has flowed into the first distribution space S2 from the outside can also flow into the second distribution space S3 and reach the bottom surface of the cask C. In the example of the present embodiment, each connecting body is connected to each block body so as to partially contact the cask C, but may be connected to each block body so as not to contact the cask C. .. As a result, the air flow near the bottom surface of the cask C can be increased, which may be more advantageous for removing heat from the cask C.

Further, as shown in FIG. 5, each connected body is arranged on the base 16 so as to be included in the projection area of the cask C in the vertical direction. As a result, in the first connected space S2, the opening region R (an example shown in a thick frame in FIG. 5) facing the gap space in the storage space S1 represented by the space G can be widely provided.

Next, the operation and effect of this embodiment will be described.

The storage container 10 for accommodating the cask C according to the present embodiment has a hexagonal columnar tubular body 12 for accommodating the cask C inside and a base arranged below the tubular body 12 to support the tubular body 12. 16 and. The base 16 includes six block bodies separated in the circumferential direction, for example, a first block body 161 to a sixth block body 166, and a connecting member connecting the six block bodies.

According to such a storage container 10, in the base 16, the block bodies are separated from each other with a circumferential distance W3, so that the first distribution space S2 and the second distribution space S2 and the second block bodies are separated from each other. The distribution space S3 is formed. As shown in FIG. 2, the first distribution space S2 and the second distribution space S3 can introduce the air introduced from the outside of the storage container 10 into the storage space S1 as the heat-removing air of the cask C or the storage container 10. Is. The air introduced in this way passes through the gap space in the storage space S1 from the lower side to the upper side along the outer wall surface of the cask C, and finally is the discharge port 14a formed in the lid body 14 or the discharge port 14a. It is discharged to the outside from the notch portion 12d formed in the tubular body 12. That is, according to the configuration of the base 16, the space between the block bodies becomes the air flow path as it is. Therefore, for example, the base 16 in the present embodiment should be lighter than the base which can be regarded as one structure as a whole and whose openings and passages for passing air are formed by cutouts and the like. Can be done. Further, by reducing the weight of the base 16, the weight of the entire storage container 10 can be reduced.

Further, according to the storage container 10, the base 16 has a larger space area than the base in which a large number of openings and passages are formed, and more air can be introduced from the outside. The heat removal performance can be improved.

Further, according to the storage container 10, the shape of each block body is simplified in the base 16, and as a result, it is advantageous to simplify the structure of the storage container 10 including the base 16 and, by extension, the base 16. Will be. Further, such simplification of the structure is also advantageous in terms of suppressing the manufacturing cost. Further, since the shape of each block body is simplified, the size of the block body can be changed and remanufactured relatively easily, so that the size of the first distribution space S2 and the second distribution space S3 can be remade. The dimensions such as the interval W3 that defines the above can be easily adjusted.

Further, in the storage container 10 according to the present embodiment, each of the six block bodies may be arranged at the lower part of the internal angle portion of the hexagonal columnar tubular body 12.

According to such a storage container 10, for example, the storage container 10 is erected on the ground as compared with the case where each block body is not arranged at the lower part of the inner corner portion of the hexagonal columnar tubular body 12. It is advantageous in terms of the stability of the posture of the storage container 10 when it is in use.

Further, in the storage container 10 according to the present embodiment, the six block bodies have an upper surface 161a to 166a partially facing the space inside the tubular body 12, and a bottom surface opposite the upper surfaces 161a to 166a, respectively. It may contain 161b to 166b.

According to such a storage container 10, the base 16 does not have a structure divided into a plurality of upper and lower layers. Therefore, the base 16 can secure a sufficient effective height, which is advantageous in terms of strength.

Further, in the storage container 10 according to the present embodiment, the distance W3 between the block bodies facing each other in the circumferential direction among the six block bodies is constant or from the outer side to the inner side of the blocks. It may spread toward you.

Here, the outer surfaces of the block bodies correspond to the outer surfaces 161c to 166c or the outer surfaces 161d to 166d of the above-exemplified examples. Further, the inner side surfaces of the block bodies correspond to the inner side surfaces of the above-exemplified 161 g to 166 g. When each of the above conditions is satisfied, the blocks facing each other in the circumferential direction are arranged apart by an interval W3 in order to form the first distribution space S2. Here, the circumferential direction specifically refers to the circumferential direction when it is assumed that a circle is drawn on a horizontal plane about the vertical axis AX. For example, the first block body 161 includes two side surfaces extending substantially radially about the vertical axis AX, that is, a first side surface 161e and a second side surface 161f. Further, the second block body 162 also includes the first side surface 162e and the second side surface 162f. That is, for example, between the first block body 161 and the second block body 162, the first side surface 161e of the first block body 161 and the second side surface 162f of the second block body 162 are separated by an interval W3. , Facing in parallel.

According to such a storage container 10, in the base 16, the air introduced into the first distribution space S2 is introduced into the storage space S1 or the second distribution space S3 without any stagnation. Therefore, the storage container 10 can further improve the heat removal performance.

Further, in the storage container 10 according to the present embodiment, the connecting member is a six connecting bodies that connect the blocks facing each other in the circumferential direction among the six blocking bodies, that is, the first connecting body. 18a to the sixth connecting body 18f are provided.

According to such a storage container 10, in the base 16, the size of the connecting body itself defines the interval W3. Therefore, by reducing the size of the connecting body within an allowable range, the base can be used. Pulling the table 16 contributes to weight reduction of the storage container 10.

Further, in the storage container 10 according to the present embodiment, the vertical length L4 of the six connected bodies may be shorter than the vertical length L3 of the six blocks.

According to such a storage container 10, in the base 16, the air introduced into the first distribution space S2 is introduced into the second distribution space S3. Therefore, the air introduced from the outside can touch the bottom surface of the cask C facing the second distribution space S3, and can come and go between the second distribution spaces S3 facing each other with the vertical axis AX as a reference. Therefore, the storage container 10 can further improve the heat removal performance.

Further, in the storage container 10 according to the present embodiment, the six connecting bodies may be included in the projection region of the tubular body 12 in the vertical direction.

According to such a storage container 10, when a plurality of storage containers 10 are arranged in close proximity to each other on their outer surfaces, the connected bodies provided in the storage containers 10 of adjacent objects collide with each other. It can be suppressed.

(Second Embodiment)
Next, the storage container according to the second embodiment will be described. FIG. 6 is a vertical sectional view showing the configuration of the storage container 30 according to the present embodiment. In the storage container 30, the same reference numerals are given to the same configurations as the storage container 10 according to the first embodiment, and the description thereof will be omitted.

In the storage container 10 according to the first embodiment, in the storage space S1, the cask C is placed directly on the upper surfaces 161a to 166a of the base 16. On the other hand, the storage container 30 according to the present embodiment further includes a plate-shaped member 20 that is supported by the block body constituting the base 16 and on which the cask C is placed.

The plate-shaped member 20 includes a metal disk 22 and a plurality of metal legs 24. The outer diameter of the disk 22 is the same as or larger than the outer diameter DC of the cask C, and smaller than the inner diameter D2 of the tubular body 12. It is assumed that the thickness T of the disk 22 can withstand the own weight of the cask C. The plurality of legs 24 are arranged on the outer periphery of the lower surface of the vertical lower surface of the disk 22 at equal intervals, that is, in non-contact with each other. The end of the leg 24 that is not connected to the disk 22 comes into contact with any of the upper surfaces 161a to 166a of each block body constituting the base 16. The vertical upper surface of the disk 22 is a surface in contact with the cask C, and is located at a height H from the upper surfaces 161a to 166a of each block body. However, the dimension of the height H is larger than the dimension of the thickness T of the disk 22.

According to such a storage container 30, the air introduced from the first distribution space S2 to the second distribution space S3 comes into contact with the vertical lower surface of the disk 22 as shown in FIG. 6, and then adjacent to each other. It passes between the legs 24 and is guided to the gap space in the storage space S1. That is, the air introduced into the first distribution space S2 from the outside is less likely to stay in the first distribution space S2. Therefore, the storage container 30 can further improve the heat removal performance.

(Third Embodiment)
Next, the storage container according to the third embodiment will be described. FIG. 7 is a perspective view showing the configuration of the storage container 40 according to the present embodiment. In FIG. 7, the drawing of the tubular body 12 and the lid body 14 is omitted. FIG. 8 is a perspective view showing the configuration of the base 46 included in the storage container 40. In the storage container 40, the same reference numerals are given to the same configurations as the storage container 10 according to the first embodiment, and the description thereof will be omitted.

In each of the above embodiments, in the base 16, the connecting member connecting the six block bodies is the six connecting bodies connecting the block bodies facing each other in the circumferential direction, that is, the first connecting body 18a. It is assumed that the sixth connecting body 18f is provided. On the other hand, the connecting member in the present embodiment includes a connecting structure 48 instead of the six connecting bodies.

The base 46 in the present embodiment includes six blocks, that is, the first block 261 to the sixth block 266, and the connecting structure 48. The shapes and arrangements of the first block body 261 to the sixth block body 266 are the same as those of the first block body 161 to the sixth block body 166 in each of the above embodiments.

The connecting structure 48 is, for example, a gantry formed by combining a plurality of H-shaped steels. The connecting structure 48 in the present embodiment has six arms extending radially, that is, a first arm portion 481, a second arm portion 482, a third arm portion 483, a fourth arm portion 484, and a fifth arm portion 485. And a sixth arm portion 486 is provided. The first arm portion 481 to the sixth arm portion 486 extend radially on a horizontal plane at intervals of 60 ° with respect to the vertical axis AX. One end of each of the six arms of the present embodiment is connected in the vicinity of the vertical axis AX. On the other hand, the other ends of the six arms are each connected to one of the six blocks.

Generally, H-section steels include upper and lower flanges facing each other and a web connecting both flanges. In each of the H-section steels forming the six arms, the upper flange faces the storage space S1 and supports the disc 22 on which the cask C is placed, as shown in FIG. As an example, the disk 22 is the same as that included in the plate-shaped member 20 in the second embodiment. In the present embodiment, the disk 22 is attached to each flange surface 48a above the six arms by welding or the like.

On the other hand, in each H-section steel forming the six arms, a part of the lower flange is supported on any upper surface 261a to 266a of each block body as shown in FIGS. 7 and 8. .. That is, each of the six arms is attached to the upper surface of each of the six block bodies. For example, the first arm portion 481 is attached to the upper surface 261a of the first block body 261. In the present embodiment, the outer end portions of the six arms are fastened to the upper surfaces 261a to 266a of any of the block bodies by using a plurality of bolts 44, respectively.

Further, the connecting structure 48 of the present embodiment includes an auxiliary connecting member 42 that connects two arms adjacent to each other in the circumferential direction. That is, the connecting structure 48 includes six auxiliary connecting members 42. Further, in the present embodiment, the ends of the two auxiliary connecting members 42 adjacent to each other in the circumferential direction face each other with the arm portion interposed therebetween. That is, the extension lines of the two auxiliary connecting members 42 intersect at the position of the arm portion. Therefore, the six auxiliary connecting members 42 have a substantially hexagonal shape. Further, the arm portion extends from the intersection position of the extension line of the auxiliary connecting member 42 to the inner peripheral side. That is, the arm portion of the present embodiment extends from the connection position of the auxiliary connecting member 42 to both the inner peripheral side and the outer peripheral side. Further, the first arm portion 481 to the sixth arm portion 486 are connected to other arm portions on the inner peripheral side of the connection position of the auxiliary connecting member 42. Further, the first arm portion 481 to the sixth arm portion 486 are attached to the upper surface of the block body on the outer peripheral side from the connection position of the auxiliary connecting member 42. The six auxiliary connecting members 42 may be made of, for example, an H-shaped steel smaller than the H-shaped steel constituting the six arms.

According to such a storage container 40, the connecting structure 48 made of H-shaped steel is replaced with the first connecting body 18a to the sixth connecting body 18f as included in the base 16 in each of the above embodiments. By using the base 46 including the above, the entire base 46 can be stiffened.

Further, in the base 46, by using the connecting structure 48 that contributes to stiffening, as shown in FIG. 8, the length L13 of the first block body 261 to the sixth block body 266 in the vertical direction is set to the first. It can be shorter than the vertical length L3 of the base 16 of the embodiment.

Further, since the connecting structure 48 connects the six blocks with the corresponding six arms, the space between the blocks in the base 46 is the same as that of the base 16 in the first embodiment. It is maintained at the same size. Therefore, according to the storage container 40, the heat removal performance can be improved as in the storage container 10 according to the first embodiment.

Further, in the storage container 40 according to the present embodiment, as shown in FIGS. 7 and 8, the base 46 has six arms and six block bodies attached via a plate body 49. May be. The plate body 49 is made of metal, for example. For example, regarding the first arm portion 481, one plate body 49 is arranged between the lower flange on the outer end portion side of the first arm portion 481 and the upper surface 261a of the first block body 261. The same applies to the second arm portion 482 to the sixth arm portion 486. That is, in the present embodiment, the base 46 is provided with a total of six plate bodies 49. However, for height adjustment or the like, a plurality of plate bodies 49 may be laminated and installed between one arm portion and one block body that supports the arm portion.

Further, as shown in FIG. 8, the plurality of plate bodies 49 may be located on the center of gravity of the upper surfaces 261a to 266a of the first block body 261 to the sixth block body 266, respectively. In FIG. 8, the center of gravity axis CG passing through the respective centers of gravity of the upper surfaces 261a to 266a is illustrated by a alternate long and short dash line. That is, in the present embodiment, the horizontal plane of the plate body 49 intersects the center of gravity axis CG.

In this case, each of the six arms is attached to the six blocks via the plate 49. At this time, the portions of the six arms that are not in contact with the plate body 49 are raised from the upper surfaces 261a to 266a of each block body by the height at which the plate body 49 is installed. Therefore, the own weight of the cask C is transmitted to each block body from the position where the plate body 49 is arranged. On the other hand, since the six plate bodies 49 are on the center of gravity of the upper surface of each block body as described above, each block body transmits the load received from the plate body 49 to the ground side almost evenly over the entire bottom surface. .. That is, the contact surface pressure between the bottom surface of each block body and the ground is approximately equal. Further, even when looking at the entire base 46, the contact surface pressure between the entire bottom surface of the base 46 and the ground is approximately equal.

According to such a storage container 40, when the cask C is placed on the base 46, the contact surface pressure between the entire bottom surface of the base 46 and the ground has a high region in the central region of the horizontal plane. The stability of the base 46 can be improved because the base 46 is approximately even without being close to each other.

Further, in the storage container 40 according to the present embodiment, the arm portion may be connected to another arm portion. Here, the arm portion means, for example, at least one arm portion of the first arm portion 481 to the sixth arm portion 486. The same applies to the arm portion.

According to such a storage container 40, the stiffening of the entire base 46 can be further strengthened.

Further, in the storage container 40 according to the present embodiment, the connecting member includes an auxiliary connecting member 42 that connects two arms adjacent to each other in the circumferential direction among the first arm portion 481 to the sixth arm portion 486. May be good.

According to such a storage container 40, the stiffening of the entire base 46 can be further strengthened.

Further, in the storage container 40 according to the present embodiment, the arm portion may extend from the connection position of the auxiliary connecting member 42 to the outer peripheral side.

According to such a storage container 40, as a result, the size and shape of the auxiliary connecting member 42 are less likely to affect the air flow introduced from the space between the block bodies in the base 46. be able to. Therefore, according to the storage container 40, the heat removal performance can be improved as in the storage container 10 according to the first embodiment.

Further, in the storage container 40 according to the present embodiment, the storage container 10 is supported on the side of the base 46 and includes a plate-shaped member on which the cask C is placed. In this embodiment, the plate-shaped member corresponds to the disk 22.

According to such a storage container 40, since the cask C is placed on the plate-shaped member, it may be advantageous in improving the stability of the cask C on the connecting structure 48.

(Aggregate)
Next, the aggregate according to one embodiment will be described. FIG. 9 is a perspective view showing the configuration of the aggregate 100 according to the present embodiment.

The aggregate 100 is a group of storage containers in which a plurality of storage containers 10 and the like according to each of the above embodiments are accumulated and arranged on the ground. For example, the aggregate 100 has a first storage container 10a for storing the first cask, a second storage container 10b for storing the second cask, and a third storage container 10c for storing the third cask, which are adjacent to each other. It shall include. The first storage container 10a, the second storage container 10b, and the third storage container 10c have a substantially hexagonal columnar shape as a whole. Therefore, in the aggregate 100, the tubular body 12 included in the first storage container 10a, the tubular body 12 included in the second storage container 10b, and the tubular body 12 included in the third storage container 10c are different from each other. It faces the two cylindrical bodies 12 and is arranged in a honeycomb shape.

As described above, in the storage container 10, the lid body 14 has a plurality of discharge ports 14a, and the tubular body 12 has a groove portion 12c on the outer surface 12a. Therefore, even when a plurality of storage containers 10 are integrated and arranged close to each other as shown in FIG. 9, the groove portions 12c of the adjacent storage containers 10 face each other to form an air flow path FP.

According to such an aggregate 100, a plurality of storage containers 10 can be brought close to each other on the outer surfaces and arranged in a honeycomb structure, so that many storage containers 10 can be arranged in a smaller occupied space. can.

Further, according to the aggregate 100, since the storage container 10 and the like which are advantageous for weight reduction are accumulated, the aggregate 100 as a whole is also advantageous for weight reduction. Therefore, for example, it may be advantageous in terms of ease of installation of the storage container 10 or the like when constructing the aggregate 100.

Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof.

10, 30, 40 Storage container 12 Cylindrical body 16,46 Base 18a to 18f Connecting body 20 Plate-shaped member 22 Disc 42 Auxiliary connecting member 48 Connecting structure 49 Plate body 100 Integrated body 161 to 166 Block body 161a to 166a Upper surface 161b to 166b Lower surface 161c to 166c First outer surface 161d to 166d Second outer surface 161g to 166g Inner surface 481 to 486 Arm C Cask

Claims (14)

A storage container for storing casks
A hexagonal columnar tubular body that houses the cask inside,
It is provided with a base, which is arranged at the bottom of the tubular body and supports the tubular body.
The base is
Six blocks separated in the circumferential direction,
A storage container comprising a connecting member for connecting the six block bodies. The storage container according to claim 1, wherein each of the six block bodies is arranged at a lower portion of an inner angle portion of the cylindrical body having a hexagonal columnar shape. Each of the six blocks
The upper surface, which partially faces the space inside the tubular body,
The bottom surface on the opposite side of the top surface and
The storage container according to claim 1 or 2, comprising the above. Any of claims 1 to 3, wherein the distance between the six block bodies facing each other in the circumferential direction is constant or widens from the outer surface side to the inner side surface side of the block bodies. The storage container according to item 1. The storage according to any one of claims 1 to 4, wherein the connecting member comprises six connecting bodies that connect the block bodies facing each other in the circumferential direction among the six block bodies in the circumferential direction. container. The storage container according to claim 5, wherein the length of the six connecting bodies in the vertical direction is shorter than the length of the six blocks in the vertical direction. The storage container according to claim 5 or 6, wherein the six connecting bodies are included in the projection area of the tubular body in a vertical direction. The connecting member comprises six arms extending radially.
The storage container according to any one of claims 1 to 4, wherein each of the six arms is attached to the upper surface of each of the six blocks. The storage container according to claim 8, wherein the arm portion and the block body are attached via a plate body. The storage container according to claim 8 or 9, wherein the arm portion is connected to the other arm portion. The storage container according to claim 8 or 9, wherein the connecting member includes an auxiliary connecting member that connects two arms adjacent to each other in the circumferential direction. The storage container according to claim 11, wherein the arm portion extends from the connection position of the auxiliary connecting member to the outer peripheral side. The storage container according to any one of claims 1 to 12, which is supported on the side of the base and includes a plate-shaped member on which the cask is placed. The first storage container for storing the first cask,
A second storage container for storing the second cask,
Including a third storage container for storing the third cask,
The first storage container, the second storage container, and the third storage container are the storage containers according to any one of claims 1 to 13, respectively.
The tubular body included in the first storage container, the tubular body included in the second storage container, and the tubular body included in the third storage container are each in the other two tubular bodies. An aggregate that faces each other and is arranged in a honeycomb shape.

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