Dry storage module for spent nuclear fuel of vertical light water reactor, with improved air outlet position and cylinder body mounting method, and storage system comprising same

Abstract

The present invention relates to a dry storage module for the spent nuclear fuel of a vertical light water reactor, and to a dry storage module with an improved air outlet and cylinder body mounting method, and a system comprising same, the module comprising: a case for forming a hexahedral accommodation space; a plurality of storage parts, which are arranged in two rows in the accommodation space, store the spent nuclear fuel and are elongated; a hexahedral module part for accommodating the storage parts; canisters in which the spent nuclear fuel is loaded; cylinder bodies each encompassing the canister; cylinder supports for attaching / detaching the cylinder body to / from the module part; an air inlet positioned at a side of the upper portion of the case; an air outlet positioned in the lower portion of the case; and shielding grids disposed in each of the inlet and the outlet.

Description

A vertical light-water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method and a storage system including the same

[0001] The present invention relates to a vertical light water reactor spent nuclear fuel dry storage module and a storage system including the same, and more specifically, to a vertical light water reactor spent nuclear fuel dry storage module having improved positions of air outlets and cylinder body mounting methods, and a storage system including the same.

[0002] Unless otherwise indicated herein, the materials described in this section are not prior art to the claims of this application, and their inclusion in this section is not intended to be admitted as prior art.

[0003] Spent nuclear fuel generated from nuclear power plants is typically stored underwater in storage pools. When storage capacity exceeds capacity, it is transferred to a separate dry storage system. A dry storage system encloses canisters loaded with spent nuclear fuel in individual containers or modules, allowing outside air to naturally circulate inside, cooling the fuel and storing it.

[0004] Conventional dry storage systems are classified into a storage cask method in which canisters loaded with nuclear fuel are stored vertically in a single cylindrical storage container, and a horizontal module method in which canisters loaded with nuclear fuel are stored horizontally in a single square storage module. FIG. 1a and FIG. 1b illustrate the conventional storage cask method and the horizontal module method dry storage systems, respectively.

[0005] As shown in the figure, in a conventional dry storage system, canisters loaded with nuclear fuel are individually stored in storage containers or modules, and multiple storage containers or modules are arranged in a row and stored at the nuclear power plant site, which requires a large site area.

[0006] In addition, as a solution to the above-mentioned conventional problems, the vertical light water reactor spent nuclear fuel dry storage module of the existing patented invention (Korean Patent No. 10-20236458) patented by the applicant of the present invention improved cooling performance by locating the air outlet formed on the side of FIG. 1c on the upper surface of the case, but this raised the issue of radiation exposure to workers and raised the realistic problem of maintenance in case of damage due to aging, deterioration, and corrosion of the cylinder body.

[0007] Therefore, there is a need for an improved dry storage module and system for spent nuclear fuel to efficiently utilize the limited space of nuclear power plants for spent nuclear fuel storage, resolve the issue of radiation exposure to workers, and resolve the issue of maintenance of aging cylinder bodies.

[0008] [Prior Art Literature]

[0009] [Patent Document]

[0010] (Patent Document 1) Korean Patent Publication No. 10-2036458 (Published on October 24, 2019)

[0011] Accordingly, the present invention is a technology that is further improved from existing inventions, and aims to efficiently utilize the site for storing spent nuclear fuel and to solve the problem of radiation exposure of workers and the problem of maintenance of the cylinder body by improving the location of the air outlet and the method of mounting the cylinder body in a vertical light water reactor spent nuclear fuel dry storage module.

[0012] In addition, it is obvious that the technical tasks are not limited to the technical tasks described above, and that other technical tasks may be derived from the following description.

[0013] A vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method according to one embodiment of the present invention is a vertical light water reactor spent nuclear fuel dry storage module for storing spent nuclear fuel used in light water reactors, comprising: a case forming a hexahedral receiving space; and a plurality of storage sections arranged in two rows in a matrix shape within the receiving space, each of which stores the spent nuclear fuel and is elongated; and a hexahedral module section for receiving the storage sections in the receiving space such that the extending direction of the storage sections is parallel to the vertical direction to the ground; wherein each of the storage sections includes: a canister in which the spent nuclear fuel is loaded; and a cylinder body surrounding the outside of the canister so that the canister does not come into contact with air; wherein the cylinder body is detachably attachable to a cylinder support fixed to the module section, and the module section includes: two or more air inlets located at a lower portion of a side of the case; And it includes two or more air outlets located on the upper side of the case and through which air that has entered the air inlet is discharged; an air path is formed between the air inlet and the air outlet, the air inlet and the air outlet are arranged so that the air path extends long along the extension direction of the storage unit, and the air path is formed on the outside of the storage unit arranged in two rows in a matrix form.

[0014] According to a preferred embodiment of the present invention, the cylinder support is characterized in that it can be detached or combined into an upper part of the support and a lower part of the support.

[0015] According to a preferred embodiment of the present invention, the cylinder body is characterized in that it is provided with a lateral rocking prevention device that prevents shaking of the lower part thereof.

[0016] According to a preferred embodiment of the present invention, the case is characterized in that the horizontal length is in the range of 15 m to 25 m and the vertical length is in the range of 5 m to 10 m.

[0017] According to a preferred embodiment of the present invention, a through hole is formed in the upper surface of the case, and the module section further includes a sealing cover that opens and closes the through hole to allow entry and exit of the storage section and prevents leakage of radioactive materials of the spent nuclear fuel.

[0018] According to a preferred embodiment of the present invention, the through holes are characterized in that they are arranged in a matrix form.

[0019] According to a preferred embodiment of the present invention, the cylinder body is characterized in that it is made of at least one material among carbon steel, tungsten, tin, copper, aluminum, and alloys thereof.

[0020] According to a preferred embodiment of the present invention, the cylinder body is characterized by including a main body made of carbon steel and a coating formed on at least a portion of the surface of the main body and made of at least one of zinc, aluminum, and copper.

[0021] According to a preferred embodiment of the present invention, the sealing cover is characterized in that it is made of a reinforced concrete material surrounded by a steel plate liner having a thickness of 1 to 5 mm.

[0022] According to a preferred embodiment of the present invention, the vertical spent nuclear fuel dry storage module is included in multiple numbers, and the vertical light water reactor spent nuclear fuel dry storage modules are arranged in a matrix form.

[0023] According to the present invention, there is an effect of efficiently utilizing a limited area for storing spent nuclear fuel of a nuclear power plant, an effect of significantly reducing radiation exposure of workers working at a nuclear power plant, and an effect of solving the problem of maintenance of a cylinder body mounted on a dry storage module for spent nuclear fuel.

[0024] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0025] Figure 1a is a cross-sectional perspective view of a conventional dry storage container for spent nuclear fuel.

[0026] Figure 1b is a cross-sectional perspective view of a conventional dry storage horizontal module.

[0027] Figure 1c is a cross-sectional perspective view of a vertical modular light water reactor spent nuclear fuel dry storage module according to an existing patented invention.

[0028] FIG. 2a and FIG. 2b are schematic perspective views of the entire cross-section of a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method according to one embodiment of the present invention.

[0029] Figure 3 is an enlarged perspective cross-sectional view of the main parts of a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method according to one embodiment of the present invention.

[0030] Figure 4 is a cross-sectional schematic diagram of the main parts of a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method according to one embodiment of the present invention.

[0031] FIG. 5 is a schematic diagram of a vertical light water reactor spent nuclear fuel dry storage system with improved air outlet location and cylinder body mounting method according to one embodiment of the present invention.

[0032] Hereinafter, with reference to the attached drawings, a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method according to a preferred embodiment and a storage system including the same will be specifically examined.

[0033] For reference, in the drawings below, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and drawing numbers for the same components are omitted in individual drawings.

[0034] Referring to FIGS. 2 to 5, one embodiment of the present invention will be described. A vertical light water reactor spent nuclear fuel dry storage module (500) having an improved air outlet location and cylinder body mounting method is a vertical light water reactor spent nuclear fuel dry storage module for storing spent nuclear fuel used in a light water reactor, comprising: a case (100) forming a hexahedral receiving space; and a plurality of storage units (200) arranged in two rows in a matrix shape within the receiving space, each of which stores the spent nuclear fuel and is elongated; and a hexahedral module unit (500) that receives the storage units (200) in the receiving space such that the extending direction of the storage units (200) is parallel to the vertical direction on the ground; and each storage unit (200) comprises: a canister (210) in which the spent nuclear fuel is loaded; A cylinder body (220) that surrounds the outside of the canister (210) so that the canister (210) does not come into contact with air; wherein the cylinder body (220) is detachable from a cylinder support (300) that is fixed to a module part (500), and the module part (500) includes two or more air inlets (110) located at the lower part of the side of the case (100); And it includes two or more air outlets located on the upper side of the side of the case (100) through which air that has entered the air inlet (110) is discharged; and the air inlet (110) and the air outlet (120) each include a shielding grid (130) and an air flow path is formed therebetween, and the air inlet (110) and the air outlet (120) are arranged so that the air flow path extends long along the extension direction of the storage unit (200), and the air flow path is formed on the outside of the storage unit (200) arranged in two rows in a matrix form.

[0035] Looking more specifically at the drawings, FIGS. 2a and 2b are schematic perspective views of the entire cross-section of a vertical type light water reactor spent nuclear fuel dry storage module (500) according to an embodiment of the present invention, in which the position of the air outlet (120) and the mounting method of the cylinder body (220) are improved, FIG. 3 is an enlarged perspective view of a cross-section of a main part of a vertical type light water reactor spent nuclear fuel dry storage module (500) according to an embodiment of the present invention, in which the position of the air outlet (120) and the mounting method of the cylinder body (220) are improved, FIG. 4 discloses a schematic cross-section of a main part of an improved vertical type light water reactor spent nuclear fuel dry storage module (500) according to an embodiment of the present invention, and FIG. 5 is a schematic diagram of a vertical type light water reactor spent nuclear fuel dry storage system (1000) according to an embodiment of the present invention, in which the position of the air outlet and the mounting method of the cylinder body are improved.

[0036] As shown in the drawing, a vertical light water reactor spent nuclear fuel dry storage module (500) for storing spent nuclear fuel (211) used in a light water reactor according to the present invention includes a hexahedral module portion (500) and a plurality of storage portions (200). The plurality of storage portions (200) store spent nuclear fuel (211) and are each elongated, and the module portion (500) includes a case (100) that forms a hexahedral receiving space for accommodating the storage portions (200) such that the extending direction of the storage portions (200) is parallel to the vertical direction on the ground.

[0037] As shown in FIGS. 2A and 2B, the storage unit (200) may be arranged in a matrix form within the receiving space of the case (100). In addition, as shown in FIG. 4, the storage unit (200) may be installed in a floating state (floating state) separated from the bottom of the receiving space of the case (100). The storage unit (200) may include a canister (210) for storing spent nuclear fuel (211) and a cylinder body (220) surrounding the canister (210).

[0038] When the storage unit (200) is vertically arranged within the receiving space of the case (100), when storing the same bundle of spent nuclear fuel (211), the area occupied by each container and module is reduced compared to the conventional system of loading and arranging one canister (210) in one container or horizontal module, so the required site area can be reduced. In other words, the nuclear fuel storage capacity increases relative to the same area, so that it can be arranged more efficiently. Therefore, it can be seen that the vertical type light water reactor spent nuclear fuel dry storage module (500) according to the present invention has the effect of effectively reducing the site area when storing the same number of canisters (210).

[0039] As shown in FIGS. 2A and 2B, the case (100) may be formed to have a length ranging from 10 m to 40 m, suitably from 12 m to 35 m, and more suitably from 15 m to 25 m, and a length ranging from 1 m to 20 m, suitably from 3 m to 25 m, and more suitably from 5 m to 10 m, but may vary depending on the number and arrangement of the canisters (210) accommodated in the module unit (500). Preferably, the case (101) may be formed to have an appropriate range so that conventionally sized canisters (210) can be accommodated in a 2x5 arrangement. The height of the case (101) may also be configured to have a range of various heights depending on the height of the canister (210), additional configurations such as the cylinder support (300), and the air flow path.

[0040] As illustrated in FIGS. 2A and 4, a through hole (105) is formed on the upper surface of the case (100). The module unit (500) opens and closes the through hole (105) to allow entry and exit to the storage unit (200), and includes a sealing cover (400) to prevent leakage of radioactive materials of the spent nuclear fuel (211). The through holes (105) are also arranged in a matrix form like the storage unit (200), but are not limited thereto.

[0041] Each of the above storage units (20) includes a nuclear fuel basket and canister (210) in which spent nuclear fuel (211) is loaded, and a cylinder body (220) that can be attached or detached from the inner space of a case (100) that surrounds the exterior of the canister (210). The cylinder body (220) seals the canister (210) so that the surface of the canister (210) does not come into direct contact with the outside air. Therefore, it has the effect of preventing corrosion of the canister (205), shielding radiation, and preventing leakage of radioactive materials. In addition, a lid-shaped sealing cover (400) is formed on the upper part of the cylinder body (220) to facilitate entry and exit of the canister (210).

[0042] The sealing cover (400) may be made of reinforced concrete surrounded by a steel plate liner. The thickness of the sealing cover (109) may be formed in the range of 0.5 to 10 mm, 0.8 to 8 mm, or 0.9 mm to 7 mm, and preferably in the range of 1 to 5 mm. The shape of the sealing cover (400) may be a square shape as shown in Fig. 2a or a circular shape. In addition, other embodiments formed in various sizes and shapes are possible.

[0043] As shown in FIGS. 2a, 2b, and 3, the cylinder body (220) is formed in a cylindrical shape of a size that surrounds the outside of a general canister (210) with a height of about 5 m and a diameter of about 2 m, and other embodiments formed in various sizes and shapes are possible.

[0044] The above cylinder body (220) is formed of a material having corrosion resistance to salt, and may be formed of a material other than stainless steel, which is a general canister (210) material. Preferably, it may be formed of at least one material among carbon steel, tungsten, tin, copper, aluminum, and alloys thereof, but is not limited thereto, and may be modified in various ways depending on economic considerations, material strength, etc.

[0045] The above cylinder body (220) includes a main body and a coating portion on at least a portion of the surface of the main body, and the main body may be made of carbon steel, and the coating portion may be made of at least one of zinc, aluminum, and copper.

[0046] As shown in FIGS. 3 and 4, a cylinder support (300) is positioned on the upper portion of the cylinder body (220). The cylinder support (300) not only supports the load of the cylinder body (220) containing spent nuclear fuel (211), but is also designed to have the function and role of allowing the cylinder body (220) to be detached and attached to facilitate maintenance in the event of damage to the cylinder body (220) due to aging, deterioration, corrosion, etc.

[0047] That is, the cylinder support (300) that supports or fixes the cylinder body (220) from above may be formed of a conical cylinder support lower portion (310) that the circular upper portion of the cylinder body (220) rests on, as shown in FIG. 3, and a cylinder support upper portion (320) that is flange-coupled to the cylinder support lower portion (310). Preferably, the conical cylinder support lower portion (310) that the circular upper portion of the cylinder body (220) rests on may be fixed by a fixing means (e.g., screw, bolt, welding, etc.).

[0048] In addition, the flange connection of the lower part (310) of the cylinder support and the upper part (320) of the cylinder support can be connected by various conventional fastening and fixing means (e.g., bolts and nuts, welding, etc.).

[0049] In addition, the cylinder support (300) may be made of stainless steel, and the interior of the upper portion (320) of the cylinder support may be filled with concrete filler (340), so that when the upper portion (320) and the lower portion (310) of the cylinder support are flange-joined, the upper surface of the cylinder body (220) may be sealed. In addition, a sealing cover (400) may be placed over the upper surface of the upper portion (320) of the cylinder support filled with the concrete filler (340) to ensure tight sealing for radiation shielding.

[0050] As described above, the cylinder body (220) supported by being hung over the cylinder support (300) is fixed to the upper part of the case (100) in a floating state (floating state) separated from the lower part of the bottom surface of the case (100). By fixing and supporting the cylinder body (220) in this way, not only can the vertical load of the cylinder body (220) be supported, but also, when damaged due to aging, deterioration, or corrosion, the sealing cover (400) and the flange joints of the upper part (320) and lower part (310) of the cylinder support can be separated (disassembled) and lifted to easily lift the cylinder body (220) out of the module (500), which has the advantageous effect of facilitating maintenance.

[0051] In addition, the internal temperature of the canister (210) for storing spent nuclear fuel (211) is in the range of 100 to 200°C depending on the storage conditions, so there is a very high possibility of thermal expansion depending on the material. This is the same for the cylinder body (220) that wraps and stores the canister (210), and when thermal expansion occurs, if the lower part of the storage part (200) is fixed as in the existing patented invention, it expands upwards, which may cause damage by applying a load to the fixed part and lid of the cylinder body, and also, stress due to thermal expansion may act on the middle part of the cylinder body, which may lower structural stability. However, the present invention supports the cylinder body (220) across the cylinder support (300) and is fixedly supported in a floating state (floating state) separated from the lower part of the bottom surface of the case (100), so that thermal expansion can occur in the lower direction of the cylinder body (220) that is in a floating state even when thermal expansion occurs, thereby solving the existing problems described above.

[0052] Meanwhile, as shown in FIGS. 2b and 3, a lateral sway prevention device (130) that laterally restrains the lower portion of the cylinder body (220) is installed on the bottom surface of the internal space of the case (100) to prevent damage, etc., caused by shaking of the cylinder body (220) due to external impacts, such as earthquakes, etc., on the module portion (500). The lateral sway prevention device (130) may have various forms and may include any means that can prevent sway of the cylinder body (220) due to external impacts, etc.

[0053] In addition, the module part (500) of the present invention includes two or more air inlets (110) located at the lower side of the case (100) and two or more air outlets (120) arranged crosswise at the upper side of the case (100) so that air introduced into the air inlets (110) is discharged.

[0054] In addition, the air inlet (110) may be formed at a position similar to the lower part of the cylinder body (220) on the side of the case (100), and the position, shape, diameter, number, etc. may be variously modified depending on the ground and geological conditions.

[0055] At this time, considering the straightness of radiation as shown in FIGS. 2b, 3 and 4, the lower air inlet (110) and the upper air outlet (120) are configured as a path with stepped steps (111, 121), thereby maintaining the thickness of the concrete structure, thereby effectively securing shielding performance for workers.

[0056] In addition, as shown in FIGS. 2b and 3, a shielding grid (130) may be additionally configured to the lower air inlet (110) and the upper air outlet (120) to further enhance the shielding performance against scattered radiation in the air. That is, radiation has the characteristic of traveling in a straight line and colliding with a wall before being scattered and moving forward. By installing a shielding grid (130) in the air path, the number of scatterings is increased, which has the effect of lowering the radiation exposure of workers near the air inlet (110) and the air outlet (120) due to scattered radiation.

[0057] In addition, by arranging the air inlet (110) and air outlet (120) crosswise on the side of the case (100), it is possible to prevent negative effects on the spent nuclear fuel storage system due to natural phenomena such as snow and rain.

[0058] In this way, an air path is formed between the air inlet (110) and the air outlet (120) of the present invention, and the air inlet (110) and the air outlet (120) are arranged so that the air path extends long along the extension direction of the storage unit (200). Air introduced into the air inlet (110) is discharged to the air outlet (120) through the air path, and through this natural convection cooling, there is an effect of cooling the decay heat generated from the spent nuclear fuel (211) stored in the canister (210).

[0059] According to a preferred embodiment of the present invention, as shown in FIG. 5, a plurality of vertical light water reactor spent nuclear fuel dry storage modules (500) can be arranged in a matrix shape to form a vertical light water reactor spent nuclear fuel dry storage system (1000). That is, the vertical light water reactor spent nuclear fuel dry storage module (500) according to the present invention has the advantage of being easy to install additionally.

[0060] Although the preferred embodiments of the present invention have been described with reference to the attached drawings, the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application. Therefore, the embodiments described above should be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the claims described below rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

[0061] [Explanation of symbols]

[0062] 100: Case, 105: Through hole, 110: Air inlet, 111: Stepped step, 120: Air outlet, 121: Stepped step, 130: Shielding grid, 200: Storage, 210: Canister, 211: Spent nuclear fuel, 220: Cylinder body, 300: Cylinder support, 310: Lower part of cylinder support, 320: Upper part of cylinder support, 330: Cylinder lateral swing prevention device, 340: Concrete filling, 400: Sealing cover, 500: Vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, 1000: Vertical light water reactor spent nuclear fuel dry storage system with improved air outlet location and cylinder body mounting method.

Claims

1. In a vertical dry storage module for spent nuclear fuel used in light water reactors, A case forming a hexahedral-shaped receiving space; and It includes a plurality of storage units, each of which is long and arranged in two rows in a matrix shape within the above-mentioned receiving space, storing the spent nuclear fuel; It includes a hexahedral module portion that accommodates the storage portion in the accommodation space so that the extension direction of the storage portion is parallel to the vertical direction on the ground; Each of the above storage units comprises a canister in which the spent nuclear fuel is loaded; A cylinder body that surrounds the outside of the canister to prevent the canister from coming into contact with air; wherein the cylinder body is detachable from a cylinder support fixed to the module portion. The above module part, Two or more air inlets located at the lower portion of the side of the case; and It comprises two or more air outlets located at the upper part of the side of the case and through which air introduced into the air inlet is discharged; The above air inlet and the above air outlet each include a shielding grid (130) and an air flow path is formed between them. The above air inlet and the above air outlet are arranged so that the air path extends along the extension direction of the storage unit, A vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, wherein the air flow path is formed on the outside of the storage section arranged in two rows in a matrix shape.

2. In paragraph 1, The above cylinder support is a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, which is separated or flanged into the upper and lower parts of the support.

3. In paragraph 1, The above cylinder body is a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, and a lateral rocking prevention device to prevent shaking of the lower part thereof.

4. In paragraph 1, The above case is a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, with a horizontal length ranging from 15 m to 25 m and a vertical length ranging from 5 m to 10 m.

5. In paragraph 1, A through hole is formed on the upper surface of the above case. The above module part, A vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, further comprising a sealing cover that opens and closes the penetration hole to allow entry and exit of the storage compartment and prevents leakage of radioactive materials of the spent nuclear fuel.

6. In paragraph 5, The above-mentioned through holes are a vertical type spent nuclear fuel dry storage module with improved air outlet locations arranged in a matrix shape and a cylinder body mounting method.

7. In paragraph 1, The above cylinder body is a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method, wherein the cylinder body is made of at least one material selected from carbon steel, tungsten, tin, copper, aluminum, and alloys thereof.

8. In paragraph 1, The above cylinder body. The main body is made of carbon steel; A vertical light water reactor spent nuclear fuel dry storage module having an improved air outlet location and cylinder body mounting method, wherein the air outlet location and the cylinder body mounting method include a coating formed on at least a portion of the surface of the main body and made of at least one of zinc, aluminum, and copper.

9. In paragraph 5, The above sealing cover is a vertical light water reactor spent nuclear fuel dry storage module with improved air outlet location and cylinder body mounting method made of reinforced concrete material surrounded by a 1 to 5 mm thick steel plate liner.

10. A vertical light water reactor spent nuclear fuel dry storage system comprising a plurality of vertical spent nuclear fuel dry storage modules according to any one of paragraphs 1 to 9, wherein the vertical light water reactor spent nuclear fuel dry storage modules are arranged in a matrix shape, and the air outlet location and cylinder body mounting method are improved.

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