Storage device

Abstract

The utility model discloses a storage device which comprises an outer shell, an inner shell and a cooling system, the inner shell is located in the outer shell, the inner shell is provided with a storage cavity, and the storage cavity is used for storing radioactive substances; the cooling system comprises a heat pipe, a cold pipe, a connecting pipe and a backflow pipe, the cold pipe, the heat pipe and the connecting pipe are all arranged in the outer shell and located outside the inner shell, the heat pipe is located above the cold pipe, the connecting pipe is communicated with the cold pipe and the heat pipe, and the backflow pipe is communicated with the heat pipe and the cold pipe and at least partially located outside the outer shell. The cooling medium in the cold pipe absorbs heat and moves upwards to the heat pipe, the heat in the heat pipe is transferred to the backflow pipe, so that the temperature of the cooling medium in the backflow pipe is increased, the heat of the cooling medium in the backflow pipe can be dissipated to air, the cooling medium in the backflow pipe flows downwards to flow to the cold pipe, and therefore driving force is generated in the backflow pipe. Driving equipment does not need to be arranged, so that the storage cost of radioactive substances is reduced.

Description

Technical Field

[0001] This utility model relates to the field of spent nuclear reactor fuel storage technology, and in particular to a storage device. Background Technology

[0002] Existing technologies for storing radioactive materials commonly fall into two categories: wet and dry methods. The wet method primarily involves storing radioactive materials in a water pool, utilizing the pool's heat exchange and radiation shielding to ensure the thermal and radiation safety of the materials. The dry method involves storing radioactive materials in a sealed container, using the container to ensure radiation shielding and allowing heat exchange with the outside atmosphere. Taking the dry storage of spent fuel in nuclear power plants as an example, concrete modules are commonly used to store and protect the fuel tanks containing spent fuel assemblies. Because concrete has poor thermal conductivity, some technologies incorporate cooling systems to improve heat dissipation efficiency, using fans or pumps to drive the flow of a cooling medium for heat exchange. However, due to the special nature of radioactive materials, highly reliable driving equipment and uninterruptible / limited-interruptible power supplies are required, increasing construction and maintenance costs and thus raising the overall cost of radioactive material storage. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a storage device capable of storing radioactive materials, thereby reducing the cost of radioactive material storage.

[0004] The storage device according to a first aspect of the present invention includes: an outer shell, an inner shell, and a cooling system.

[0005] The inner shell has a storage cavity for storing radioactive materials; the outer shell is wrapped around the outside of the inner shell; the cooling system includes a heat pipe, a cold pipe, a connecting pipe, and a return pipe, the heat pipe, the cold pipe, the connecting pipe, and the return pipe for supplying cooling medium flow, the cold pipe, the heat pipe, and the connecting pipe are all disposed inside the outer shell and outside the inner shell, the heat pipe is located above the cold pipe, one end of the connecting pipe is connected to the cold pipe and the other end is connected to the heat pipe, one end of the return pipe is connected to the heat pipe and the other end is connected to the cold pipe, and at least partially located outside the outer shell.

[0006] The storage device according to the embodiments of the present utility model has at least the following beneficial effects:

[0007] In this embodiment, the heat pipe, cold pipe, and connecting pipe are all disposed inside the outer shell to form a heat-absorbing region, and at least a portion of the return pipe is located outside the outer shell to form a heat-releasing region. Therefore, when the storage device of this embodiment is used to store radioactive materials, a cooling medium is introduced into the cooling system. The heat released by the radioactive material in the containment cavity is transferred to the heat-absorbing region through the inner shell. The heat absorption density of the cooling medium in the heat-absorbing region decreases, thereby moving upward to the heat pipe. Subsequently, the high-temperature cooling medium in the heat pipe transfers heat to the return pipe. The cooling medium in the return pipe exchanges heat with the outside air and cools down. At the same time as cooling, the density increases and flows downward to the cold pipe, thereby generating a driving force in the return pipe to make the cooling medium in the cooling system circulate without the need for a driving device, thereby reducing the manufacturing and maintenance costs of the storage device, and thus reducing the storage cost of radioactive materials.

[0008] According to some embodiments of the present invention, the heat pipe has a first sidewall facing the inner shell and adapted to the shape of the outer wall of the inner shell, the first sidewall being fitted to the outer wall of the inner shell; and / or

[0009] The cooling pipe has a second sidewall facing the inner shell and adapted to the outer wall of the inner shell, the second sidewall being in contact with the outer wall of the inner shell; and / or,

[0010] The connecting pipe has a third sidewall facing the inner shell and adapted to the outer wall of the inner shell, the third sidewall being in contact with the outer wall of the inner shell.

[0011] According to some embodiments of this utility model, a thermally conductive adhesive is provided between the cold pipe and the inner shell; and / or,

[0012] A thermally conductive adhesive is provided between the heat pipe and the inner shell; and / or,

[0013] Thermally conductive adhesive is provided between the connecting pipe and the inner shell.

[0014] According to some embodiments of the present invention, the reflux pipe includes a heat dissipation section located outside the outer shell. The outer perimeter of the cross-section of the heat dissipation section is C1, and the outer perimeter of the cross-section of the heat pipe is C2, where C1 > C2.

[0015] According to some embodiments of the present invention, the return pipe includes a heat dissipation section located outside the outer casing, and the cooling system includes multiple return pipes, the sum of the outer perimeters of the cross-sections of the multiple heat dissipation sections being C. 总 The perimeter of the outer edge of the heat pipe's cross-section is C2, C 总 >C2.

[0016] According to some embodiments of the present invention, the sum of the outer edge areas of the cross-sections of the plurality of heat dissipation portions is S. 总 The outer edge area of ​​the cross-section of the heat pipe is S2, S 总 <S2。

[0017] According to some embodiments of this utility model, the heat pipe is inclined downwards along the direction from the heat pipe to the return pipe; or...

[0018] The heat pipe is inclined upwards along the direction from the heat pipe to the return pipe.

[0019] According to some embodiments of the present invention, the cold pipe is inclined downwards along the direction from the return pipe to the cold pipe.

[0020] According to some embodiments of the present invention, the storage device further includes a first temperature sensor disposed inside the heat pipe.

[0021] According to some embodiments of the present invention, the storage device further includes a second temperature sensor, which is disposed inside the cold pipe.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of a first storage device according to the first aspect of the present invention;

[0025] Figure 2 for Figure 1 Sectional view;

[0026] Figure 3 This is a cross-sectional view of a second type of storage device according to the first aspect of this utility model;

[0027] Figure 4 This is a cross-sectional view of a third type of storage device according to the first aspect of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the fourth storage device according to the first aspect of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the fifth type of storage device according to the first aspect of this utility model;

[0030] Figure 7 for Figure 6 Schematic diagram of the arrangement of the reflux pipe and heat pipe;

[0031] Figure 8 This is a schematic diagram of the structure of the sixth storage device according to the first aspect of this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the seventh type of storage device according to the first aspect of this utility model;

[0033] Figure 10 This is a schematic diagram of the structure of the eighth storage device according to the first aspect of this utility model;

[0034] Figure 11 This is a structural schematic diagram of the ninth type of storage device according to the first aspect of this utility model.

[0035] Figure label:

[0036] Inner shell 100, outer shell 200;

[0037] Cooling system 300, heat pipe 310, first side wall 311, cold pipe 320, second side wall 321, connecting pipe 330, return pipe 340, heat dissipation part 341, connecting part 342;

[0038] Thermal conductive adhesive 400, first temperature sensor 500, second temperature sensor 600. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] Existing technologies for storing radioactive materials commonly fall into two categories: wet and dry methods. The wet method primarily involves storing radioactive materials in a water pool, utilizing the pool's heat exchange and radiation shielding to ensure the thermal and radiation safety of the materials. The dry method involves storing radioactive materials in a sealed container, using the container to ensure radiation shielding and allowing heat exchange with the outside atmosphere. Taking the dry storage of spent fuel in nuclear power plants as an example, concrete modules are commonly used to store and protect the fuel tanks containing spent fuel assemblies. Because concrete has poor thermal conductivity, some technologies incorporate cooling systems to improve heat dissipation efficiency, using fans or pumps to drive the flow of a cooling medium for heat exchange. However, due to the special nature of radioactive materials, highly reliable driving equipment and uninterruptible / limited-interruptible power supplies are required, increasing construction and maintenance costs and thus raising the overall cost of radioactive material storage.

[0044] To address the aforementioned problems, this invention proposes a storage device capable of storing radioactive materials, thereby reducing the cost of radioactive material storage. (Refer to...) Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the first storage device according to the first aspect of the present invention. Figure 2 for Figure 1 A cross-sectional view of the storage device in this embodiment shows that it includes: a housing 200, an inner housing 100, and a cooling system 300.

[0045] The inner shell 100 has a storage cavity for storing radioactive materials. The inner shell 100 is made of steel, for example, a material with high thermal conductivity and sealing properties, to prevent leakage of radioactive materials. The outer shell 200 is made of radiation-shielding materials such as lead or concrete to improve the radiation shielding capability of the storage equipment. The cooling system 300 includes a heat pipe 310, a cold pipe 320, a connecting pipe 330, and a return pipe 340. The heat pipe 310, cold pipe 320, connecting pipe 330, and return pipe 340 can be round, square, or irregularly shaped pipes for supplying cooling medium. The cold pipe 320, heat pipe 310, and connecting pipe 330 are all located inside the outer shell 200 and outside the inner shell 100. The heat pipe 310 is located above the cold pipe 320, and one end of the connecting pipe 330 is connected to the cold pipe 320, and the other end is connected to the heat pipe 310. One end of the return pipe 340 is connected to the heat pipe 310, and the other end is connected to the cold pipe 320. It is located at least partially outside the housing 200. The cooling medium can flow through the cold pipe 320, the connecting pipe 330 and the heat pipe 310 in sequence, and flow back to the cold pipe 320 via the return pipe 340.

[0046] Specifically, in this embodiment, the heat pipe 310, cold pipe 320, and connecting pipe 330 are all disposed inside the outer shell 200 to form a heat-absorbing region, and at least a portion of the return pipe 340 is located outside the outer shell 200 to form a heat-releasing region. Therefore, when the storage device of this embodiment is used to store radioactive materials, a cooling medium is filled into the cooling system 300. The cooling medium is, for example, water, sodium chloride solution, or sodium fluoride solution. The heat released by the radioactive material in the storage cavity is transferred to the heat-absorbing region through the inner shell 100. Since fluids expand in volume and decrease in density when heated, the heat released by the radioactive material in the storage cavity is transferred to the heat-absorbing region. Due to its inherent properties, the cooling medium absorbs heat and heats up, expanding in volume and moving upwards to the heat pipe 310. The high-temperature cooling medium in the heat pipe 310 then transfers heat to the return pipe 340. The cooling medium in the return pipe 340 exchanges heat with the outside air, cooling down. Simultaneously, its density increases, causing it to flow downwards towards the cold pipe 320. This generates a driving force within the return pipe 340, causing the cooling medium in the cooling system 300 to circulate. This eliminates the need for a driving device, thereby reducing the manufacturing and maintenance costs of the storage equipment, and consequently, lowering the storage cost of radioactive materials.

[0047] Reference Figure 3 , Figure 3This is a cross-sectional view of a second storage device according to a first aspect embodiment of the present invention. In some embodiments, the heat pipe 310 has a first sidewall 311 facing the inner shell 100 and adapted to the shape of the outer wall of the inner shell 100, and the first sidewall 311 is attached to the outer wall of the inner shell 100. For example, the outer wall of the inner shell 100 is a cylindrical surface, and the first sidewall 311 is set as an arc surface adapted to the cylindrical surface and attached to the cylindrical surface, thereby increasing the contact area between the heat pipe 310 and the inner shell 100, thereby improving the heat transfer capacity between the heat pipe 310 and the inner shell 100, thereby improving the heat dissipation capacity of the storage device of this embodiment, and thus improving the safety of storing radioactive materials. Similarly, in some embodiments, the cold pipe 320 has a second sidewall 321 facing the inner shell 100 and adapted to the outer wall of the inner shell 100, and the second sidewall 321 is attached to the outer wall of the inner shell 100. In some embodiments, the connecting tube 330 has a third sidewall facing the inner shell 100 and adapted to the outer wall of the inner shell 100, the third sidewall being in contact with the outer wall of the inner shell 100, which will not be described in detail here.

[0048] Figure 4 This is a cross-sectional view of a third type of storage device according to the first aspect of this utility model. In some embodiments, a thermally conductive adhesive 400 is provided between the cold pipe 320 and the inner shell 100. The thermally conductive adhesive 400 can increase the heat conduction area between the cold pipe 320 and the inner shell 100, thereby improving the heat dissipation performance of the storage device. Specifically, for example, in some embodiments, the cold pipe 320 is formed by processing commercially available round pipes, and the inner shell 100 is a cylindrical structure. Therefore, the area in contact between the cold pipe 320 and the inner shell 100 is a straight line. However, in this embodiment, by filling the space between the cold pipe 320 and the inner shell 100 with thermally conductive adhesive 400, it is not necessary to process the outer wall of the cold pipe 320 to form a concave arc surface that matches the inner shell 100, thereby increasing the heat conduction area between the cold pipe 320 and the inner shell 100 and reducing the processing cost of the cold pipe 320. Furthermore, even if the cold pipe 320 is provided with a second sidewall 321 that matches the shape of the outer wall of the inner shell 100, as in the above embodiments, there may still be tiny gaps or uneven areas due to processing errors. This would reduce the heat conduction area between the cold pipe 320 and the inner shell 100. In this embodiment, the thermally conductive adhesive 400 between the second sidewall 321 and the outer wall of the inner shell 100 can effectively improve this problem. Similarly, in some embodiments, thermally conductive adhesive 400 is provided between the heat pipe 310 and the inner shell 100, and in some embodiments, thermally conductive adhesive 400 is provided between the connecting pipe 330 and the inner shell 100. These details will not be elaborated here.

[0049] Reference Figure 5 , Figure 5This is a schematic diagram of the structure of a fourth type of storage device according to the first aspect of this utility model. In some embodiments, the return pipe 340 includes a heat dissipation part 341, which is located outside the outer casing 200 and in contact with the air. The outer perimeter of the cross-section of the heat dissipation part 341 is C1, and the outer perimeter of the cross-section of the heat pipe 310 is C2, where C1 > C2, to increase the heat dissipation area of ​​the return pipe 340. Specifically, for example, the length of the heat dissipation part 341 is L, and the return pipe 340 also includes connecting parts 342 located at both ends of the heat dissipation part 341. The connecting part 342 is a pipe with the same cross-section as the heat pipe 310 and a diameter of D2 (taking a circular pipe as an example). The diameter of the heat dissipation part 341 is D1. If the return pipe 340 is a pipe with the same diameter as the heat pipe 310 with the same cross-section, i.e., D1 = D2, then the heat dissipation area of ​​the heat dissipation part 341 is C2L = πD2L. In this embodiment, the return pipe 340 is a variable diameter pipe, D1>D2, and the heat dissipation area is CL=πD1L>πD2L, so as to increase the heat dissipation area of ​​the return pipe 340.

[0050] The cooling system 300 is not limited to a single return pipe 340, for example, refer to Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the structure of the fifth type of storage device according to the first aspect of this utility model. Figure 7 for Figure 6 A schematic diagram of the arrangement of the return pipes and heat pipes. In some embodiments, multiple return pipes 340 may be provided. Similarly, the sum of the outer perimeters of the heat dissipation portions 341 of the multiple return pipes 340 is C. 总 The outer perimeter of heat pipe 310 is C2, thereby increasing the heat dissipation area of ​​cooling system 300. Specifically, for example, the length of heat dissipation section 341 is L, and the sum of the perimeters of the cross-sections of multiple heat dissipation sections 341 is C. 总 The outer perimeter of the heat pipe 310's cross-section is C2. If the cooling system only has one return pipe 340 with the same diameter as the heat pipe 310, then the area of ​​the outer surface of the heat dissipation part 341 is LC2, that is, the heat dissipation area of ​​the return pipe 340 is LC2. In this embodiment, multiple return pipes 340 are provided, and the total cross-sectional area of ​​the heat dissipation part 341 of the multiple return pipes 340 is C. 总 Its heat dissipation is LC 总 Because of C 总 >C2, therefore LC 总 >LC2, thereby increasing the heat dissipation area of ​​the cooling system 300.

[0051] Reference Figure 7 Based on the above embodiments, the total outer edge area of ​​the cross-sections of the plurality of heat dissipation parts 341 is S. 总 The outer edge area of ​​the cross-section of heat pipe 310 is S2, S 总<S2. Specifically, taking a circular tube as an example, the diameter of the heat dissipation part 341 is D1, the length is L, the outer diameter of the heat pipe 310 is D2, and the outer diameter of the return pipe 340 is D1 = D2 / 3. The heat dissipation system includes five return pipes 340, and the total heat dissipation area S of the heat dissipation parts 341 of the five return pipes 340 散 = 5πD2L / 3, and the total volume V 总 = 5S 总 L = π(D2 / 6) 2 L = 5LπD2 2 / 36. If the cooling system only sets one return pipe 340 with the same diameter as the heat pipe 310, then the heat dissipation area of the heat dissipation part 341 is S 散 = πD2L < 5πD2L / 3, and the volume V of the heat dissipation part 341 = S2L = πD2 2 L / 4 > 5πD2 2 L / 36. It can be seen that the cooling system 300 in this embodiment has a larger heat dissipation area and a smaller volume. It can not only reduce the material cost of the return pipe 340, but also reduce the space occupied by the return pipe 340, making the storage device of this embodiment occupy less floor area.

[0052] Referring to Figure 8 , Figure 8 , which is a schematic structural diagram of the sixth storage device according to the first aspect embodiment of the present invention. In some embodiments, along the direction from the heat pipe 310 to the return pipe 340, the heat pipe 310 is inclined upward. When in use, the cooling system 300 is filled with a cooling medium. Thus, the cooled medium after absorbing heat can more easily flow to the return pipe 340 under the action of buoyancy for heat exchange with the air, thereby improving the cooling effect of the cooling system 300 in this embodiment and enhancing the heat dissipation performance of the storage device of this embodiment.

[0053] In addition, referring to Figure 9 , Figure 9 , which is a schematic structural diagram of the seventh storage device according to the first aspect embodiment of the present invention. In some embodiments, along the direction from the heat pipe 310 to the return pipe 340, the heat pipe 310 is inclined downward. When in use, a part of the cooling medium is charged into the cooling system 300, and during the working process, the cooling medium absorbs heat and vaporizes. The vaporized cooling medium floats into the heat pipe 310 and flows through the heat pipe 310 to the return pipe 340 for heat exchange and then liquefies. The liquefied cooling medium enters the cold pipe 320 through the return pipe 340 to absorb heat again. It can be known that in this embodiment, along the direction from the heat pipe 310 to the return pipe 340, the heat pipe 310 is inclined downward. Therefore, it can prevent the liquefied cooling medium from flowing back into the connecting pipe 330 through the heat pipe 310 to block the connecting pipe 330, ensuring that the gaseous cooling medium can enter the heat pipe 310 through the connecting pipe 330, thereby improving the reliability of the cooling system 300 in this embodiment.

[0054] Reference Figure 10 , Figure 10 This is a schematic diagram of the structure of the eighth type of storage device according to the first aspect of the present invention. In some embodiments, the cold pipe 320 is inclined downward along the direction from the return pipe 340 to the inside of the outer shell 200, so that the cooling medium flowing back from the return pipe 340 to the cold pipe 320 can fill the cold pipe 320 under the action of gravity, thereby making the cooling medium inside the cold pipe 320 more uniform, so that the temperature of the inner shell 100 is more uniform.

[0055] Reference Figure 11 In some embodiments, the storage device further includes a first temperature sensor 500, which may be, for example, a thermocouple, a resistance temperature detector, or a thermistor sensor. The first temperature sensor 500 is disposed within the heat pipe 310 and is used to detect the temperature of the heat pipe 310 to monitor the temperature of the storage device during operation, thereby preventing safety accidents caused by overheating of the storage device. It should be noted that the reason for placing the first temperature sensor 500 within the heat pipe 310 is that the heat pipe 310 is relatively far from the cold pipe 320, and its temperature is less affected by the lower-temperature cooling medium in the cold pipe 320, thus more accurately reflecting the temperature of the storage device.

[0056] Reference Figure 11 , Figure 11 This is a schematic diagram of the structure of the ninth type of storage device according to the first aspect of the present invention. Based on the above embodiment, the storage device further includes a second temperature sensor 600. The second temperature sensor 600 is, for example, a thermocouple, a resistance temperature detector, or a thermistor sensor. The second temperature sensor 600 is disposed inside the cold pipe 320 and is used to detect the temperature of the cold pipe 320. Thus, the heat dissipation effect of the cooling system 300 can be known through the temperature difference detected by the first temperature sensor 500 and the second temperature sensor 600, so as to allow workers to monitor the heat dissipation performance of the cooling system 300 and facilitate workers' maintenance of the storage device.

[0057] In some embodiments, the housing 200 is formed by concrete casting, and the cold pipe 320, the heat pipe 310, and the connecting pipe 330 are embedded within the housing 200. Specifically, concrete has a lower cost, and the housing 200 can be more easily cast using concrete, thereby reducing the manufacturing cost of the housing 200. Furthermore, concrete makes it easier to fix the cold pipe, the heat pipe 310, and the connecting pipe 330 without the need for other fixing structures, further reducing the manufacturing cost of the storage device in this embodiment.

[0058] The storage device according to the second aspect of the present invention includes a cooling medium and the storage device described in the first aspect embodiment. The cooling medium is located in the cooling system 300 and can flow in the cold pipe 320, the connecting pipe 330, the heat pipe 310 and the return pipe 340. Specifically, the heat pipe 310, cold pipe 320, and connecting pipe 330 in the storage device are all disposed inside the outer shell 200 to form a heat-absorbing area, and at least a portion of the return pipe 340 is located outside the outer shell 200 to form a heat-releasing area. Therefore, when the storage device of this embodiment is used to store radioactive materials, the heat released by the radioactive materials in the storage cavity is transferred to the heat-absorbing area through the inner shell 100. The heat absorption density of the cooling medium in the heat-absorbing area decreases, thereby moving upward to the heat pipe 310. Subsequently, the high-temperature cooling medium in the heat pipe 310 transfers heat to the return pipe 340. The cooling medium in the return pipe 340 exchanges heat with the outside air and cools down. At the same time as cooling, the density increases and flows downward to the cold pipe 320, thereby generating a driving force in the return pipe 340 so that the cooling medium in the cooling system 300 circulates without the need for a driving device, thereby reducing the manufacturing cost and maintenance cost of the storage device, and thus reducing the storage cost of radioactive materials.

[0059] It should be noted that, since this embodiment adopts all the technical features of the storage device of the first aspect embodiment, this embodiment possesses all the beneficial effects brought about by the first aspect embodiment.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, in the description of the present invention, the reference to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A storage device, characterized in that, Used for storing radioactive materials, including: The inner shell has a storage cavity for storing radioactive materials; The outer shell, which encloses the outer part of the inner shell; A cooling system includes a heat pipe, a cold pipe, a connecting pipe, and a return pipe. The heat pipe, the cold pipe, the connecting pipe, and the return pipe are used to supply cooling medium flow. The cold pipe, the heat pipe, and the connecting pipe are all disposed inside the outer shell and located outside the inner shell. The heat pipe is located above the cold pipe. One end of the connecting pipe is connected to the cold pipe, and the other end is connected to the heat pipe. One end of the return pipe is connected to the heat pipe, and the other end is connected to the cold pipe, and it is at least partially located outside the outer shell.

2. The storage device according to claim 1, characterized in that, The heat pipe has a first sidewall facing the inner shell and adapted to the shape of the outer wall of the inner shell, the first sidewall being fitted to the outer wall of the inner shell; and / or The cooling pipe has a second sidewall facing the inner shell and adapted to the outer wall of the inner shell, the second sidewall being in contact with the outer wall of the inner shell; and / or, The connecting pipe has a third sidewall facing the inner shell and adapted to the outer wall of the inner shell, the third sidewall being in contact with the outer wall of the inner shell.

3. The storage device according to claim 1 or 2, characterized in that, A thermally conductive adhesive is provided between the cooling pipe and the inner shell; and / or, A thermally conductive adhesive is provided between the heat pipe and the inner shell; and / or, Thermally conductive adhesive is provided between the connecting pipe and the inner shell.

4. The storage device according to claim 1, characterized in that, The return pipe includes a heat dissipation section located outside the outer casing. The outer perimeter of the cross-section of the heat dissipation section is C1, and the outer perimeter of the cross-section of the heat pipe is C2, where C1 > C2.

5. The storage device according to claim 1, characterized in that, The return pipe includes a heat dissipation section located outside the outer casing. The cooling system includes multiple return pipes, and the sum of the outer perimeters of the cross-sections of the multiple heat dissipation sections is C. 总 The perimeter of the outer edge of the heat pipe's cross-section is C2, C 总 >C2.

6. The storage device according to claim 5, characterized in that, The sum of the outer edge areas of the cross-sections of the plurality of heat dissipation parts is S 总 The outer edge area of ​​the cross-section of the heat pipe is S2, S 总 <S2。 7. The storage device according to claim 1, characterized in that, Along the direction from the heat pipe to the return pipe, the heat pipe is inclined downwards; or, The heat pipe is inclined upwards along the direction from the heat pipe to the return pipe.

8. The storage device according to claim 1, characterized in that, Along the direction from the return pipe to the cold pipe, the cold pipe is inclined downwards.

9. The storage device according to claim 1, characterized in that, The storage device further includes a first temperature sensor, which is disposed inside the heat pipe.

10. The storage device according to claim 9, characterized in that, The storage device also includes a second temperature sensor, which is disposed inside the cold pipe.

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