Irradiation channel tube assembly and reactor comprising same

Abstract

The invention discloses an irradiation channel pipe assembly and a reactor comprising the same, the irradiation channel pipe assembly is used for connecting a reactor top hall and the reactor and transmitting an irradiation device, a reactor core cabin is arranged in the reactor, the reactor top hall is located right above the reactor, and the irradiation channel pipe assembly comprises a hollow pipe body; the pipe body is arranged at the top of the reactor in a penetrating manner and extends to the bottom of a reactor core cabin from a reactor top hall along the vertical direction; the irradiation tube channel assembly further comprises sealing structures, and the tube body is provided with at least one sealing structure in the vertical direction. And the sealing structure opens or closes the pipe body to form sealed isolation between the reactor and the reactor top hall. The hollow pipe body is arranged at the top of the reactor in a penetrating manner and extends to the bottom of the reactor core cabin from the reactor top hall, so that a transportation channel of the irradiation device is provided, and the irradiation device can be transported to the reactor core from the reactor top hall; through cooperation of the pipe body and the sealing structure, the irradiation device is separated from the reactor core fused salt and the reactor top environment, and the overall safety and leakproofness of the irradiation device environment are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of molten salt reactor irradiation reactors, and in particular to an irradiation channel tube assembly and a reactor comprising the same. Background Art

[0002] A reactor is a type of large radiation source with multiple types of rays. Among the existing reactors for irradiation tests, water reactors and sodium-cooled fast reactors are the main test reactor types. Their irradiation devices are all immersed in coolants. During the test, the heat generated by the irradiation of the irradiation device can be taken away by the reactor coolant. Especially in pool-type water-cooled test reactors, the irradiation device even needs to be heated during the test in order to meet certain test temperature requirements.

[0003] According to the design plan of TMSR-LF1 and subsequent molten salt reactors, the molten salt reactor can separate the irradiation device from the molten salt coolant in the reactor by using a channel pipe structure, which plays a role of isolation. Based on the characteristics of liquid fuel molten salt reactors, the design of the channel pipe is particularly important for material irradiation operations and radiation safety. Directly above the reactor is the top hall, and the core compartment is set in the reactor. Since the irradiation compartment is set in the core, the disassembly, installation and transfer of the irradiation compartment are all carried out in the top hall. The channel pipe of the irradiation device needs to pass directly from the core to the top hall. Therefore, in the design of the entire channel, radiation protection and safety protection of the operation process are extremely important. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an irradiation channel tube assembly and a reactor containing the same based on the design planning of a molten salt reactor, keep the irradiation device and the core environment closed relative to the top environment of the reactor, and transport the irradiation device.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] An irradiation channel tube assembly is used to connect a reactor top hall and a reactor and to transmit an irradiation device. A core compartment is provided in the reactor, and the reactor top hall is located directly above the reactor. The irradiation channel tube assembly comprises a hollow tube body; the tube body is passed through the top of the reactor and extends from the reactor top hall to the bottom of the core compartment along the vertical direction; the irradiation tube channel assembly also comprises a sealing structure, and the tube body is provided with at least one sealing structure along the vertical direction; the sealing structure opens or closes the tube body, and after the sealing structure is closed, the reactor and the reactor top hall are sealed and isolated.

[0007] In this scheme, an irradiation channel tube assembly is provided, in which a hollow tube body is passed through the top of the reactor and extends vertically from the reactor top hall to the bottom of the core compartment, thereby providing a transportation channel for the irradiation device, so that the irradiation device can be placed into the tube body from the reactor top hall and enter the core along the tube body; through the cooperation of the tube body and the sealing structure, the irradiation device is separated from the core molten salt environment and the reactor top environment, thereby ensuring the overall safety and airtightness of the transmission environment and working environment of the irradiation device.

[0008] Preferably, the sealing structure comprises a knife gate valve assembly, and the knife gate valve assembly comprises at least one knife gate valve arranged on the tube body along the length direction of the tube body.

[0009] In this solution, knife gate valve assemblies are set up to segment and isolate the tube body, and the sealing of knife gate valves is used to prevent gas leakage in the tube body and shield radiation in the reactor; knife gate valves are set along the length of the tube body to support and prevent the irradiation tube channel assembly from falling, and by opening and closing the knife gate valves, the irradiation device can be transported in sections during installation to prevent it from falling directly into the core and causing damage, thereby increasing the safety of operation and adjustment of the irradiation device. Among them, the knife gate valve is electrically controlled, which is convenient for the operator to control the opening and closing of the knife gate valve; when the channel tube in the core is damaged and causes molten salt leakage, the knife gate valve can be closed to close the channel tube to avoid the risk of further leakage.

[0010] Preferably, the knife gate valve assembly includes a manual operating part and a transmission assembly, the manual operating part is arranged in the pile top hall, and the transmission assembly extends from the manual operating part to the knife gate valve, so that the operator can control the opening and closing of the knife gate valve through the manual operating part.

[0011] In this solution, by setting up the manual operating part and the transmission component, the operator can manually control the opening and closing of the knife gate valve through the manual operating part in the event of a failure in the electric operation, and through the transmission component, in the event of a failure in the electric operation, the opening and closing of the knife gate valve in the pile below can still be remotely controlled from the pile top hall, thereby avoiding personnel from entering the pile and increasing the safety and airtightness of the working environment.

[0012] Preferably, the reactor comprises an upper compartment, and the upper compartment is provided with a shielding cover, and the shielding cover forms the top of the upper compartment.

[0013] In this solution, an integrated structure of a shielding cover is provided as the top end cover of the upper compartment to provide support and seal the space above the reactor, thereby increasing the integrity and sealing of the reactor structure and reducing radiation leakage.

[0014] Preferably, along the vertical direction from top to bottom, the top of the tube body protrudes from the shielding cover and extends toward the stack top hall, and the portion formed is the stack top hall section; the portion of the tube body passing through the shielding cover is the shielding top section; the portion of the tube body arranged in the upper stack compartment is the upper stack compartment section, and the portion of the tube body passing through the core compartment is the in-core section.

[0015] Preferably, the shielding top section and the upper stack compartment section are separated by the knife gate valve, and the opening and closing of the knife gate valve are used to control the connection and disconnection of the shielding top section and the upper stack compartment section; and / or, the upper stack compartment section and the in-pillar section are separated by the knife gate valve, and the opening and closing of the knife gate valve are used to control the connection and disconnection of the upper stack compartment section and the in-pillar section.

[0016] In this scheme, by setting a knife gate valve and controlling the opening and closing of the knife gate valve, the channel tube is closed by the knife gate valve before the irradiator enters the channel tube and after it leaves the channel tube, thereby reducing the gas exchange between the channel tube and the gas in the reactor top hall during the transportation operation of the irradiator; preventing foreign matter from falling into the channel tube after the irradiator is lifted out of the core; increasing the safety of the irradiator in the process of aligning the channel above the channel tube, allowing the irradiator to be lowered to the core in sections, and then opening and closing the knife gate valves at different sections in turn according to the transportation position of the irradiator, so as to prevent the irradiator from directly falling into the bottom of the core and causing damage when it falls, thereby increasing the safety of operation and adjustment.

[0017] Preferably, a core is provided in the core compartment, and the in-combustion section includes a core compartment section and a core section, the core compartment section is the portion of the tube body extending from the core compartment to the upper surface of the core, and the core section is the portion of the tube body extending into the core.

[0018] The core section is where the irradiation device conducts irradiation activities. During any process of reactor installation, heating, starting up, operation and shutdown, the tube body remains vertical from top to bottom. Sufficient space is left in the core to accommodate the displacement of the in-core channel tube caused by thermal expansion.

[0019] Preferably, the sealing structure comprises a top cover, which is disposed on the top of the tube body and movably connected to the tube body.

[0020] In this solution, a movable connection and an openable and closable top cover are provided on the top of the tube body. When the tube body is not in use, the top cover is used to close the tube body, thereby reducing gas and radiation leakage and preventing foreign matter from falling into the tube body.

[0021] Preferably, the outer jacket of the stack top hall section is provided with an adaptive support structure; and / or the shielding top section is connected to the upper stack compartment section via a flange, and an adaptive support structure is provided at the connection along the length direction of the tube body.

[0022] In this solution, an adaptive support structure is adopted to absorb the displacement caused by thermal expansion, reduce the displacement of the reactor top hall section, the shield top section, and the upper reactor compartment section due to thermal expansion, and increase the stability of the overall structure in the vertical direction; the shield top section and the upper reactor compartment section are connected by flanges to increase the sealing and stability of the connection.

[0023] The present invention also provides a reactor, which comprises the above-mentioned irradiation channel tube assembly.

[0024] The positive and progressive effects of the present invention are as follows: by setting up an irradiation channel tube assembly, a hollow tube body is passed through the top of the reactor and extends vertically from the reactor top hall to the bottom of the core compartment, thereby providing a transportation channel for the irradiation device, so that the irradiation device can be placed into the tube body from the reactor top hall and enter the core along the tube body; through the cooperation of the tube body and the sealing structure, the irradiation device is separated from the core molten salt environment and the reactor top environment, thereby ensuring the overall safety and airtightness of the transmission environment and working environment of the irradiation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure of an irradiation channel tube assembly provided in an embodiment of the present invention.

[0026] Figure 2 A side cross-sectional view of an irradiation channel tube assembly provided in an embodiment of the present invention.

[0027] Figure 3 A cross-sectional view of an irradiation channel tube assembly provided in an embodiment of the present invention when installed in a reactor.

[0028] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0029] Figure 5 for Figure 3 A local enlarged schematic diagram of point B in the middle.

[0030] Figure 6 for Figure 3 A partial enlarged schematic diagram of point C in the middle.

[0031] Figure 7 for Figure 3 A partial enlarged schematic diagram of point D in the middle.

[0032] Figure 8 for Figure 3 A partial enlarged schematic diagram of point E in the middle.

[0033] Description of reference numerals:

[0034] Tube body 1

[0035] Top cover 11

[0036] Reactor 2

[0037] Heap Hall 20

[0038] Duiding Hall Section 201

[0039] Shielding cover 21

[0040] Shielding top section 211

[0041] Upper stack 22

[0042] Upper stack section 221

[0043] Core compartment 23

[0044] In-pile section 230

[0045] Core compartment 231

[0046] Core segment 232

[0047] Knife gate valve assembly 3

[0048] Upper knife gate valve 31

[0049] Lower knife gate valve 32

[0050] Transmission components 33

[0051] Manual operation unit 34

[0052] Adaptive support structure 4

[0053] Bellows 41 DETAILED DESCRIPTION

[0054] A preferred embodiment is given below and combined with the accompanying drawings to more clearly and completely illustrate the present invention, but the invention is not limited to the scope of the embodiment.

[0055] like Figure 1-Figure 8 As shown, this embodiment provides an irradiation channel tube assembly, which is used to connect the reactor top hall 20 and the reactor 2 and transmit the irradiation device. The reactor 2 is provided with a core compartment 23, and the reactor top hall 20 is located directly above the reactor 2. The irradiation channel tube assembly includes a hollow tube body 1, and the outer wall of the tube body 1 is provided with a radioactive absorption layer; the tube body 1 is penetrated through the top of the reactor 2 and extends from the reactor top hall 20 to the bottom of the core compartment 23 along the vertical direction; the irradiation tube channel assembly also includes a sealing structure, and the tube body 1 is provided with at least one sealing structure along the vertical direction; the sealing structure opens or closes the tube body 1, and after the sealing structure is closed, the reactor 2 and the reactor top hall 20 are sealed and isolated.

[0056] In this embodiment, an irradiation channel tube assembly is provided, in which a hollow tube body 1 is passed through the top of the reactor 2 and extends vertically from the reactor top hall 20 to the bottom of the core compartment 23, thereby providing a transportation channel for the irradiation device, so that the irradiation device can be placed into the tube body 1 from the reactor top hall 20 and enter the core along the tube body 1; through the cooperation of the tube body 1 and the sealing structure, the irradiation device is separated from the core molten salt environment and the reactor top environment, thereby ensuring the overall safety and airtightness of the transmission environment and working environment of the irradiation device.

[0057] like Figure 1-Figure 3 as well as Figure 5 and Figure 6 As shown, the sealing structure includes a knife gate valve assembly, and the knife gate valve assembly includes at least one knife gate valve arranged on the pipe body 1 along the length direction of the pipe body 1.

[0058] In this embodiment, the shielding top section 211 and the upper stack compartment section 221 are separated by the upper knife gate valve 31, and the opening and closing of the upper knife gate valve 31 are used to control the connection and disconnection of the shielding top section 211 and the upper stack compartment section 221; and / or, the upper stack compartment section 221 and the in-combustible section 230 are separated by the lower knife gate valve 32, and the opening and closing of the lower knife gate valve 32 are used to control the connection and disconnection of the upper stack compartment section 221 and the in-combustible section 230.

[0059] By setting a knife gate valve and controlling the opening and closing of the knife gate valve, the channel tube is closed by the knife gate valve before the irradiation device enters the channel tube and after leaving the channel tube, and the gas exchange between the gas in the channel tube and the gas in the top hall 20 is reduced during the transportation operation of the irradiation device; foreign matter is prevented from falling into the channel tube after the irradiation device is lifted out of the core; the safety of the irradiation device aligning the channel above the channel tube is increased, and the irradiation device is lowered to the core in sections, and then the knife gate valves at different sections are opened and closed in turn according to the transportation position of the irradiation device to prevent the irradiation device from falling directly to the bottom of the core and causing damage when it falls, thereby increasing the safety of operation and adjustment. Among them, the knife gate valves are all electrically controlled, which is convenient for the operator to control the opening and closing of the knife gate valve; when the channel tube in the core is damaged and causes molten salt leakage, the lower knife gate valve 32 can be closed to close the channel tube to avoid the risk of further leakage.

[0060] In this embodiment, the sealing structure adopts a knife gate valve that is electrically opened and closed. In other embodiments, those skilled in the art can select other sealing structural components according to actual needs.

[0061] like Figure 1-Figure 3 as well as Figure 5 and Figure 6As shown, the knife gate valve assembly includes a manual operating part 34 and a transmission assembly 33. The manual operating part 34 is arranged in the pile top hall 20, and the transmission assembly 33 extends from the manual operating part 34 to the knife gate valve, so that the operator can control the opening and closing of the knife gate valve through the manual operating part 34. In this embodiment, the manual operating part 34 is a handle. Through the arrangement of the manual operating part 34 and the transmission assembly 33, the operator can manually control the opening and closing of the knife gate valve through the manual operating part 34 in the event of a failure in the electric operation, and remotely transmit through the transmission assembly 33. In the event of a failure in the electric operation, the opening and closing of the knife gate valve in the pile below can still be remotely controlled from the pile top hall 20, so as to avoid personnel entering the pile, thereby increasing the safety and airtightness of the working environment.

[0062] like Figure 3 As shown, the reactor 2 includes an upper compartment, and the upper compartment is provided with a shielding cover 21, which forms the top of the upper compartment. In this embodiment, an integrated structure of the shielding cover 21 is provided as the top end cover of the upper compartment to provide support and seal the space above the reactor 2, thereby increasing the integrity and sealing of the structure of the reactor 2 and reducing radiation leakage.

[0063] like Figure 3 and Figure 4 As shown, along the vertical direction from top to bottom, the top of the tube body 1 protrudes from the shielding cover 21 and extends toward the stack top hall 20, forming the stack top hall section 201; the portion of the tube body 1 passing through the shielding cover 21 is the shielding top section 211; the portion of the tube body 1 disposed in the upper stack compartment is the upper stack compartment section 221, and the portion of the tube body 1 passing through the core compartment 23 is the in-core section 230.

[0064] like Figure 1 and Figure 7 As shown, a core is arranged in the core compartment 23, and the in-core section 230 includes a core compartment section 231 and a core section 232. The core compartment section 231 is the part of the tube body 1 extending from the core compartment 23 to the upper surface of the core, and the core section 232 is the part of the tube body 1 extending into the core. The core section 232 is the place where the irradiation device performs irradiation activities. In any process of installation, heating, starting up, operation and shutdown of the reactor 2, the tube body 1 remains vertical from top to bottom. Sufficient space is left in the core to accommodate the displacement of the channel tube of the in-core section 230 due to thermal expansion.

[0065] In this embodiment, the sealing structure further includes a top cover 11, which is disposed on the top of the tube body 1 and is movably connected to the tube body 1. In this embodiment, by arranging a movably connected and openable top cover 11 on the top of the tube body 1, the tube body 1 is sealed by the top cover 11 when the tube body 1 is not in use, thereby reducing gas and radiation leakage and preventing foreign matter from falling into the tube body 1.

[0066] like Figure 1-Figure 5As shown, the outside of the stack top hall section 201 and the connection between the shield top section 211 and the upper stack compartment section 221 are sleeved with an adaptive support structure 4. By adopting the adaptive support structure 4, the displacement caused by thermal expansion is absorbed, the displacement of the stack top hall section 201, the shield top section 211, and the upper stack compartment section 221 due to thermal expansion is reduced, and the stability of the overall structure in the vertical direction is increased.

[0067] In this embodiment, the adaptive support structure 4 is a bellows 41 . The bellows 41 has good flexibility, can adapt to and compensate for displacement caused by thermal expansion, and has good sealing performance.

[0068] In other embodiments, those skilled in the art may adopt other forms of adaptive support structures 4 according to actual needs, including sliding brackets, flexible supports or joints, which may also achieve the effect of compensating for displacement.

[0069] This embodiment also provides a reactor, which includes the above-mentioned irradiation channel tube assembly.

[0070] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship of the device or element in normal use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation at any time, and therefore cannot be understood as a limitation of the present invention in this regard.

[0071] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An irradiation channel pipe assembly, used to connect a reactor top hall and a reactor and transmit an irradiation device, wherein a core compartment is provided in the reactor, and the reactor top hall is located directly above the reactor. It is characterized in that The irradiation channel tube assembly includes a hollow tube body, which is disposed on the top of the reactor and extends vertically from the reactor top hall to the bottom of the core compartment; The irradiation channel tube assembly also includes a sealing structure. Along the vertical direction, the tube body is provided with at least one sealing structure; the sealing structure opens or closes the tube body. After the sealing structure is closed, the reactor and the stack top hall are sealed and isolated.

2. The irradiation channel tube assembly according to claim 1, characterized in that: The sealing structure comprises a knife gate valve assembly, and the knife gate valve assembly comprises at least one knife gate valve arranged on the pipe body along the length direction of the pipe body.

3. The irradiation channel tube assembly according to claim 2, characterized in that: The knife gate valve assembly includes a manual operating part and a transmission assembly, the manual operating part is arranged in the pile top hall, and the transmission assembly extends from the manual operating part to the knife gate valve, so that an operator can control the opening and closing of the knife gate valve through the manual operating part.

4. The irradiation channel tube assembly according to claim 2, characterized in that: The reactor comprises an upper compartment, and the upper compartment is provided with a shielding cover, and the shielding cover forms the top of the upper compartment.

5. The irradiation channel tube assembly according to claim 4, characterized in that: From top to bottom along the vertical direction, the top of the tube body protrudes from the shielding cover and extends toward the top hall of the stack, forming the top hall section; the part of the tube body passing through the shielding cover is the shielding top section; the part of the tube body arranged in the upper stack compartment is the upper stack compartment section, and the part of the tube body passing through the core compartment is the in-stack section.

6. The irradiation channel tube assembly according to claim 5, characterized in that: The shielding top section and the upper stack compartment section are separated by the knife gate valve, and the opening and closing of the shielding top section and the upper stack compartment section are controlled by the opening and closing of the knife gate valve; And / or, the upper stack compartment section and the in-pile section are separated by the knife gate valve, and the connection and disconnection of the upper stack compartment section and the in-pile section are controlled by opening and closing of the knife gate valve.

7. The irradiation channel tube assembly according to claim 5, characterized in that: A core is arranged in the core compartment, and the in-combustion section includes a core compartment section and a core section. The core compartment section is the portion of the tube body extending from the core compartment to the upper surface of the core, and the core section is the portion of the tube body extending into the core.

8. The irradiation channel tube assembly according to claim 1, characterized in that: The sealing structure comprises a top cover, which is arranged on the top of the tube body and movably connected to the tube body.

9. The irradiation channel tube assembly according to any one of claims 5 to 7, characterized in that: The outer jacket of the pile top hall section is provided with an adaptive support structure; And / or, the shielding top section is connected to the upper stack compartment section via a flange, and an adaptive support structure is provided at the connection along the length direction of the tube body.

10. A reactor, characterized in that: The reactor comprises the irradiation channel tube assembly according to any one of claims 1-9.

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