Composite hot chamber and method of use

Abstract

The application provides a composite hot chamber and a use method, which comprise a core function layer and an auxiliary function layer, the core function layer and the auxiliary function layer are arranged in the composite hot chamber, the core function layer comprises a primary treatment layer, a decommissioning treatment layer and a maintenance treatment layer, and the auxiliary function layer comprises a first hoisting layer; the primary treatment layer, the decommissioning treatment layer, the maintenance treatment layer and the first hoisting layer are sequentially arranged in the height direction, the first hoisting layer is arranged on the composite hot chamber, and the primary treatment layer, the decommissioning treatment layer and the maintenance treatment layer are independently arranged; the primary treatment layer, the decommissioning treatment layer and the maintenance treatment layer are partially communicated, so that the first hoisting layer hoists the equipment in the primary treatment layer, the decommissioning treatment layer and the maintenance treatment layer. Through the structural separation, the physical shielding of radioactive and non-radioactive equipment can be realized, and flexible supervision is facilitated, the auxiliary function layer further comprises a second hoisting layer, the second hoisting layer hoists the components in the primary treatment layer and the decommissioning treatment layer, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power engineering, in particular to a composite hot cell and a use method. BACKGROUND

[0002] CFETR (China Fusion Engineering Test Reactor) is a new generation of Tokamak device in China. The hot cell, as an important auxiliary facility of CFETR, is mainly responsible for the maintenance and decommissioning of the internal components and equipment of the Tokamak. The components to be maintained include inner blanket segments, outer blanket segments, divertors, neutral beam sources, diagnostic devices, heating devices, limiter inserts, cryogenic pump valves, and main machine remote operation equipment. First, the components are transferred from the main hall to the hot cell for temporary storage and damage detection, and a choice is made between maintenance and renovation and decommissioning according to the damage. For components that can restore their original functions through maintenance, temporary storage, cleaning and decontamination, damage detection, maintenance and renovation, function testing, and transfer back to the main hall are performed for subsequent use. For components that cannot be used, temporary storage, flipping, cleaning and decontamination, block segmentation, tritium removal, buffering, disassembly, preparation and temporary storage, and transfer out are performed for long-term storage in the radioactive waste area.

[0003] The prior art provides a tritium factory layout structure of a Tokamak magnetic confinement fusion power station, which belongs to the technical field of nuclear engineering plant layout. According to functions, the tritium factory includes a mechanical penetration area, an inner fuel circulation system equipment area, an outer fuel circulation system equipment area, a water tritium removal system equipment area, a ventilation and tritium removal system equipment area, a comprehensive layout area, a staircase and elevator area, an equipment hoisting area, and a passage area. The functional areas with high tritium concentration are arranged inside the tritium factory, and the functional areas with low tritium concentration are arranged outside. The tritium factory layout structure is simple and reasonable in layout, not only improves the radiation protection effect and meets the needs of commercial nuclear power stations, but also improves the space utilization rate of the nuclear power station.

[0004] However, due to the large size of the blanket, divertor and other components, the high tritium escape, and the complex process of equipment maintenance and decommissioning, the above-mentioned existing hot cell layout structure does not separate the maintenance functional area and the decommissioning functional area, which is not reasonable in structure and cannot meet the maintenance and decommissioning work requirements of components with large size. SUMMARY

[0005] The technical problem to be solved by the present application is that the existing hot cell layout structure does not separate the maintenance functional area and the decommissioning functional area, which is not reasonable in structure.

[0006] This invention provides a composite hot chamber, comprising a core functional layer and an auxiliary functional layer, both disposed within the composite hot chamber. The core functional layer includes a pretreatment layer, a decommissioning treatment layer, and a maintenance treatment layer. The auxiliary functional layer includes a first hoisting layer. The pretreatment layer, decommissioning treatment layer, maintenance treatment layer, and first hoisting layer are arranged sequentially upwards along the height direction. The first hoisting layer is disposed on the composite hot chamber, and the pretreatment layer, decommissioning treatment layer, and maintenance treatment layer are independently arranged. Partially, the pretreatment layer, decommissioning treatment layer, and maintenance treatment layer are connected to allow the first hoisting layer to hoist equipment within these layers.

[0007] Optionally, in the aforementioned composite hot chamber, the maintenance treatment layer includes a first maintenance layer and a second maintenance layer, which are arranged sequentially upwards along the height direction, and the first maintenance layer is connected to the main unit hall.

[0008] Optionally, in the aforementioned composite hot chamber, the hoisting layer further includes a second hoisting layer, which is disposed between the decommissioning treatment layer and the first maintenance layer, and is suitable for hoisting equipment within the initial treatment layer and the decommissioning treatment layer.

[0009] Optionally, in the aforementioned composite hot chamber, the initial treatment layer includes a cladding temporary storage area, a flipping and cleaning decontamination area, a window CASK storage and maintenance area, a cleaned cladding storage and damage detection area, a cleaned divertor storage and damage detection area, a new fuel hoisting area, and a solid waste medium- and long-term storage area.

[0010] Optionally, the aforementioned composite hot chamber includes a decommissioning treatment layer comprising a temporary storage area for decommissioned core components, a temporary storage area for decommissioned neutral beam sources, remote control equipment, window inserts, etc., a cutting and dismantling area, a temporary storage area for component blocks, a detritium removal area, a preparation area for detritium-removed solid waste, a storage area for tritium-containing cleaning materials, and a new fuel hoisting and transfer area.

[0011] Optionally, in the aforementioned composite hot chamber, the first maintenance layer includes a heavy-duty robotic arm, a maintenance platform storage and maintenance area inside the vacuum chamber; a cladding refurbishment and testing area; a maintenance cladding temporary storage area; a divertor storage area; a divertor repair and testing area; a repaired divertor storage area; and a new fuel hoisting channel.

[0012] Optionally, in the aforementioned composite hot chamber, the second maintenance layer includes a diagnostic device, a heating device storage and maintenance area; a maintenance workshop remote control equipment storage and maintenance area; and an auxiliary system layout area including: a hot chamber ventilation system layout area, a maintenance workshop auxiliary system layout area, and a control room for hot chamber remote operation.

[0013] Optionally, the wall thickness of the aforementioned composite hot chamber is not less than 100cm.

[0014] The present invention also provides a method for using a composite hot chamber, comprising the following steps:

[0015] The components are classified within the initial processing layer;

[0016] For core components, they are turned over and cleaned in the initial treatment layer. After cleaning, they are cleaned and decontaminated, and damaged. Components that pass the test are hoisted to the maintenance treatment layer for repair. Components that fail the test are hoisted to the decommissioning treatment layer to await subsequent decommissioning operations.

[0017] Diagnostic devices, heating devices, and remote control equipment in the maintenance workshop are inspected in the initial treatment layer and then hoisted to the maintenance treatment layer for repair. Scrapped parts are hoisted to the decommissioning treatment layer to await subsequent decommissioning operations.

[0018] For window plug-ins, cleaning and decontamination and damage detection are carried out in the initial processing layer. Components that pass the test are hoisted to the maintenance processing layer for repair, while components that fail the test are hoisted to the decommissioning processing layer for subsequent decommissioning operations.

[0019] For neutral beam sources, they are directly transported and hoisted to the decommissioning treatment layer for decommissioning operations.

[0020] Optionally, the above-described method of using the composite hot chamber also includes the following:

[0021] Before the components are sorted in the initial processing layer, the components to be processed are transported from the main hall to the first maintenance layer and then hoisted to the initial processing layer through the first hoisting layer.

[0022] In the maintenance process of core components in the maintenance treatment layer, the components that pass the test are hoisted from the first hoisting layer to the first maintenance layer, and after maintenance, they are transferred back to the main unit hall.

[0023] In the maintenance process of diagnostic devices, heating devices and remote control equipment in the maintenance workshop, after inspection in the initial treatment layer, they are hoisted from the first hoisting layer to the second maintenance layer, and then transferred to their respective storage and maintenance areas. After maintenance and passing the test, they are hoisted back to the first maintenance layer and then transferred back to the main hall.

[0024] In the maintenance process of window plug-ins, the tested components are hoisted from the first hoisting layer to the first maintenance layer, repaired, and then returned to the main control room.

[0025] In the decommissioning process of the neutral beam source, it is directly transferred and hoisted from the second hoisting layer to the decommissioning treatment layer.

[0026] The technical solution provided by this invention has the following advantages:

[0027] 1. The composite hot chamber provided by the present invention includes a core functional layer and an auxiliary functional layer, both of which are disposed within the composite hot chamber. The core functional layer includes a pretreatment layer, a decommissioning treatment layer, and a maintenance treatment layer. The auxiliary functional layer includes a first hoisting layer. The pretreatment layer, decommissioning treatment layer, maintenance treatment layer, and first hoisting layer are arranged sequentially upwards along the height direction. The first hoisting layer is disposed on the composite hot chamber. The pretreatment layer, decommissioning treatment layer, and maintenance treatment layer are arranged independently of each other.

[0028] The initial processing layer, the decommissioning processing layer, and the maintenance processing layer are partially connected, so that the first hoisting layer can hoist the equipment in the initial processing layer, the decommissioning processing layer, and the maintenance processing layer.

[0029] This composite hot chamber structure, by structurally separating the initial treatment layer of the cleaning and diagnostic area for the placed items, the decommissioning treatment layer for retired components, and the maintenance treatment layer, can achieve physical shielding between radioactive and non-radioactive equipment on the one hand, and facilitate flexible supervision on the other. A first hoisting layer is set at the top of the composite hot chamber to hoist the components in the core functional layer, which improves operational efficiency.

[0030] 2. The method of using the composite hot chamber provided by the present invention includes the following steps:

[0031] The components are classified within the initial processing layer;

[0032] For core components, they are turned over and cleaned in the initial treatment layer. After cleaning, they are cleaned and decontaminated, and damaged. Components that pass the test are hoisted to the maintenance treatment layer for repair. Components that fail the test are hoisted to the decommissioning treatment layer to await subsequent decommissioning operations.

[0033] Diagnostic devices, heating devices, and remote control equipment in the maintenance workshop are inspected in the initial treatment layer and then hoisted to the maintenance treatment layer for repair. Scrapped parts are hoisted to the decommissioning treatment layer to await subsequent decommissioning operations.

[0034] For window plug-ins, cleaning and decontamination and damage detection are carried out in the initial processing layer. Components that pass the test are hoisted to the maintenance processing layer for repair, while components that fail the test are hoisted to the decommissioning processing layer for subsequent decommissioning operations.

[0035] For neutral beam sources, they are directly transported and hoisted to the decommissioning treatment layer for decommissioning operations.

[0036] This method of using a composite hot chamber achieves physical shielding between radioactive and non-radioactive equipment by classifying and layering different types of components to be processed, reducing the radiation impact on personnel. The classified storage of different components is beneficial for subsequent supervision. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the planar structure of the initial treatment layer of the composite heat chamber provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the decommissioning treatment layer of the composite hot chamber provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the planar structure of the second hoisting layer of the composite heat chamber provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the planar structure of the first maintenance layer of the composite heat chamber provided in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the planar structure of the second maintenance layer of the composite heat chamber provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the planar structure of the first hoisting layer of the composite heat chamber provided in an embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1-Initial processing layer;

[0046] 2-Decommissioning processing layer;

[0047] 3-First hoisting layer;

[0048] 4-First maintenance layer;

[0049] 5-Second maintenance layer;

[0050] 6-Second hoisting layer. Detailed Implementation

[0051] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "linking," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] Example 1

[0056] This embodiment provides a composite hot chamber, including a core functional layer and an auxiliary functional layer, both of which are disposed within the composite hot chamber. The core functional layer includes a pretreatment layer 1, a decommissioning treatment layer 2, and a maintenance treatment layer, while the auxiliary functional layer includes a first hoisting layer 3. The pretreatment layer 1, decommissioning treatment layer 2, maintenance treatment layer, and first hoisting layer 3 are arranged sequentially upwards along the height direction, with the first hoisting layer 3 disposed on the composite hot chamber. The pretreatment layer 1, decommissioning treatment layer 2, and maintenance treatment layer are arranged independently of each other. However, the pretreatment layer 1, decommissioning treatment layer 2, and maintenance treatment layer are partially connected to each other, allowing the first hoisting layer 3 to hoist the equipment within the pretreatment layer 1, decommissioning treatment layer 2, and maintenance treatment layer.

[0057] The composite hot chamber provided in this embodiment also includes a pre-treatment layer 1 and a maintenance treatment layer including a first maintenance layer 4 and a second maintenance layer 5. The first maintenance layer 4 and the second maintenance layer 5 are arranged sequentially upward along the height direction. The first maintenance layer 4 is connected to the main unit hall.

[0058] The composite hot chamber provided in this embodiment also includes a second hoisting layer 6, which is located between the decommissioning treatment layer 2 and the first maintenance layer 4, and is suitable for hoisting equipment in the initial treatment layer 1 and the decommissioning treatment layer 2.

[0059] like Figure 1 As shown, the composite hot chamber provided in this embodiment includes a preliminary treatment layer 1 comprising a cladding temporary storage area, a flipping and cleaning decontamination area, a window CASK storage and maintenance area, a cleaned cladding storage and damage detection area, a cleaned divertor storage and damage detection area, a new fuel hoisting area, and a solid waste medium- and long-term storage area.

[0060] Specifically, in this embodiment, a process equipment for handling items is set up in the initial treatment layer 1, including the following components: (1) core components such as the blanket and divertor; (2) remote control operation equipment such as the robot and CASK; (3) window plug-in such as diagnostic and heating devices; (4) neutral beam source. Different operations are required for different components: (1) During the cleaning process of the core components, the components need to be flipped over to ensure that all surfaces of the components are cleaned. Therefore, a flipping area is provided to accommodate the simultaneous storage of 32 high-field side blanket sectors and 48 low-field side blanket sectors. After flipping, cleaning and decontamination and damage detection are performed. Components that pass the test are hoisted to the first maintenance layer 4. After maintenance, they are returned to the main hall. Components that fail the test are hoisted to the temporary storage area of ​​decommissioned core components in the decommissioning treatment layer 2 for subsequent decommissioning operations; (2) For the main remote control equipment, upper, middle and lower window CASK storage and maintenance units are set up respectively, and three tracks are set up for transporting components. For components that require maintenance or replacement of end tools, after maintenance and passing the test, they are hoisted to the first maintenance floor 4 and transferred back to the main unit hall. For scrapped components, they are hoisted to the temporary storage area for scrapped neutral beam sources, remote control equipment, and window plug-ins in the decommissioning treatment floor 2 for subsequent decommissioning operations. (3) For window plug-ins, they are cleaned, decontaminated, and damaged. Components that pass the test are hoisted to the first maintenance floor 4 and, after maintenance, transferred back to the main unit hall. Components that fail the test are hoisted to the temporary storage area for scrapped neutral beam sources, remote control equipment, and window plug-ins in the decommissioning treatment floor 2 for subsequent decommissioning operations. (4) For neutral beam sources, after being transferred in this floor, they are directly hoisted to the temporary storage area for scrapped neutral beam sources, remote control equipment, and window plug-ins in the decommissioning treatment floor 2 for decommissioning operations. In addition, this floor also has a solid waste treatment and medium- and long-term storage area.

[0061] like Figure 2As shown, the composite hot chamber provided in this embodiment includes a decommissioning treatment layer 2, which includes a temporary storage area for decommissioned core components, a temporary storage area for decommissioned neutral beam sources, remote control equipment, window plugs, etc., a cutting and dismantling area, a temporary storage area for component blocks, a detritium removal area, a preparation area for detritium-removed solid waste, a storage area for tritium-containing cleaning materials, and a new fuel hoisting and transfer area.

[0062] Specifically, in this embodiment, the decommissioning treatment layer 2 mainly realizes the decommissioning process of components in the hot chamber. After the equipment has undergone damage inspection, the components to be scrapped need to be cut and disassembled, detritium removed, prepared, and stored in this layer for medium and long term. Therefore, according to the decommissioning process, block cutting, temporary storage of component blocks, detritium removal, and a preparation area for detritium-removed solid waste are set up in sequence, and then lifted by crane to the medium and long term storage area for solid waste in the initial treatment layer 1. In addition, a storage area for tritium-containing cleaning materials is also set up.

[0063] like Figure 4 As shown, the composite hot chamber provided in this embodiment includes a first maintenance layer 4 comprising a heavy-duty robotic arm, a maintenance platform storage and maintenance area inside the vacuum chamber; a cladding refurbishment and testing area; a maintenance cladding temporary storage area; a divertor storage area; a divertor repair and testing area; a repaired divertor storage area; and a new fuel hoisting channel.

[0064] Specifically, in this embodiment, the first maintenance layer 4 mainly implements the maintenance process of some repairable components and arranges the corresponding process equipment. After damage detection, repairable cladding and divertor components are hoisted from the initial treatment layer 1 to this layer and transported via the integrated pipe gallery to the cladding refurbishment and testing unit and the divertor repair and testing unit, respectively. After repair and passing the test, they are transferred to the temporary storage unit. In addition, the heavy-duty robotic arm and the maintenance platform in the vacuum chamber are also maintained and temporarily stored on this layer. All repaired components are then transported back to the main control hall via the transport corridor. The interface between the hot chamber and the main control hall is located on the first maintenance layer 4. Components to be processed and transported out of the main control hall are hoisted from the first maintenance layer 4 to the initial treatment layer 1 for maintenance and decommissioning operations in the hot chamber. For damaged and unrepairable components, new components need to be replaced. The new components are transported from the initial treatment layer 1 into the hot chamber, then hoisted to the first maintenance layer 4 through the new material hoisting area, and then transported to the main control hall via the transport corridor.

[0065] like Figure 5 As shown, the composite hot chamber provided in this embodiment includes a second maintenance layer 5 comprising a diagnostic device, a heating device storage and maintenance area, a maintenance workshop remote control equipment storage and maintenance area, and an auxiliary system layout area comprising: a hot chamber ventilation system layout area, a maintenance workshop auxiliary system layout area, and a control room for hot chamber remote operation.

[0066] Specifically, in this embodiment, the second maintenance layer 5 is also used to implement the maintenance process for repairable components, and it also houses the hot chamber auxiliary system and its equipment. Diagnostic devices, heating devices, and remote control equipment for the maintenance workshop are transferred from the initial processing layer 1 to the hoisting platform on this layer, then transferred to their respective storage and maintenance areas, maintained, and tested before being hoisted to the first maintenance layer 4 and transported back to the main control hall via the transport corridor. In addition, this layer also has an auxiliary system layout area, including: a hot chamber ventilation system layout area, a maintenance workshop auxiliary system layout area, and a control room for realizing remote operation of the hot chamber.

[0067] The composite hot chamber provided in this embodiment has a wall thickness of not less than 100cm. By increasing the wall thickness of the hot chamber, the radioactive isolation effect is ensured and the radiation impact on operators is reduced.

[0068] like Figure 3 and Figure 6 As shown, in this embodiment, the composite hot chamber has a first hoisting layer 3 that is a mezzanine. To enable the hoisting of equipment in the initial treatment and decommissioning treatment layers 2, a hot chamber workshop crane is installed on the first hoisting layer 3. A dual-rail crane for item transfer is installed on the second hoisting layer 6 to enable the hoisting of equipment in the area above the first maintenance layer 4.

[0069] The composite hot chamber provided in this embodiment is equipped with stairs and elevators to facilitate personnel access.

[0070] The composite hot chamber provided in this embodiment is designed with a frame structure, consisting of six layers from bottom to top. The first layer is the initial treatment layer 1, located at ground level (0m height); the second layer is the decommissioning treatment layer 2, located at 12m height; the third layer is the second hoisting layer 6, located at 18m height; the fourth layer is the first maintenance layer 4, located at 24m height; the fifth layer is the second maintenance layer 6, located at 36m height; and the sixth layer is the first hoisting layer 3, located at 42m height. By structurally separating the area for cleaning and diagnosing items, the decommissioning treatment layer 2 for scrapped components, and the maintenance treatment layer, both physical shielding of radioactive and non-radioactive equipment can be achieved, and flexible monitoring is also facilitated.

[0071] Example 2

[0072] This embodiment provides a method for using a composite hot chamber, including the following steps:

[0073] The components are classified within the initial processing layer 1;

[0074] For core components, they are turned over and cleaned in the initial treatment layer 1. After cleaning, they are cleaned and decontaminated, and damaged. After passing the test, they are hoisted to the maintenance treatment layer for repair. Components that fail the test are hoisted to the decommissioning treatment layer 2 to await subsequent decommissioning operations.

[0075] Diagnostic devices, heating devices, and remote control equipment in the maintenance workshop are inspected in the initial treatment layer 1 and then hoisted to the maintenance treatment layer for repair. Scrapped parts are hoisted to the decommissioning treatment layer 2 for subsequent decommissioning operations.

[0076] For window plug-ins, cleaning and decontamination and damage detection are carried out in the initial processing layer 1. Components that pass the test are hoisted to the maintenance processing layer for repair, while components that fail the test are hoisted to the decommissioning processing layer 2 for subsequent decommissioning operations.

[0077] For neutral beam sources, they are directly transported and hoisted to decommissioning treatment layer 2 for decommissioning operations.

[0078] The method of using the composite hot chamber provided in this embodiment also includes the following:

[0079] Before the components are sorted in the initial processing layer 1, the components to be processed are transported from the main hall to the first maintenance layer 4 and then hoisted to the initial processing layer 1 via the first hoisting layer 3.

[0080] In the maintenance process of core components in the maintenance treatment layer, the components that pass the test are hoisted from the first hoisting layer 3 to the first maintenance layer 4, and after maintenance, they are transferred back to the main unit hall.

[0081] In the maintenance process of diagnostic devices, heating devices and remote control equipment in the maintenance workshop, after inspection on the initial treatment layer 1, they are hoisted from the first hoisting layer 3 to the second maintenance layer 5, and then transferred to their respective storage and maintenance areas. After maintenance and passing the test, they are hoisted from the first hoisting layer 3 to the first maintenance layer 4 and then transferred back to the main unit hall.

[0082] In the maintenance process of window plug-ins, the tested components are hoisted from the first hoisting layer 3 to the first maintenance layer 4 for maintenance and then returned to the main control room.

[0083] In the decommissioning process of the neutral beam source, it is directly transferred and hoisted from the second hoisting layer 6 to the decommissioning treatment layer 2.

[0084] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A composite hot chamber, characterized in that, It includes a core functional layer and an auxiliary functional layer, both of which are located in the composite hot chamber. The core functional layer includes a pre-treatment layer (1), a decommissioning treatment layer (2), and a maintenance treatment layer. The auxiliary functional layer includes a first hoisting layer (3). The initial treatment layer (1), the decommissioning treatment layer (2), the maintenance treatment layer and the first hoisting layer (3) are arranged sequentially upward along the height direction. The first hoisting layer (3) is located at the top of the composite heat chamber. The initial treatment layer (1), the decommissioning treatment layer (2) and the maintenance treatment layer are arranged independently of each other. The initial processing layer (1), the decommissioning processing layer (2), and the maintenance processing layer are partially connected so that the first hoisting layer (3) can hoist the equipment in the initial processing layer (1), the decommissioning processing layer (2), and the maintenance processing layer. The maintenance layer includes a first maintenance layer (4) and a second maintenance layer (5), which are arranged sequentially upwards along the height direction. The first maintenance layer (4) is connected to the main hall. The hoisting layer also includes a second hoisting layer (6), which is located between the decommissioning treatment layer (2) and the first maintenance layer (4) and is suitable for hoisting equipment in the initial treatment layer (1) and the decommissioning treatment layer (2).

2. The composite heat chamber according to claim 1, characterized in that, The initial treatment layer (1) includes a temporary cladding storage area, a flipping and cleaning decontamination area, a window CASK storage and maintenance area, a cleaned cladding storage and damage detection area, a cleaned divertor storage and damage detection area, a new fuel hoisting area, and a solid waste medium- and long-term storage area.

3. The composite heat chamber according to claim 2, characterized in that, The decommissioning treatment layer (2) includes a temporary storage area for decommissioned core components, a decommissioned neutral beam source, remote control equipment, a temporary storage area for window plugs, a cutting and dismantling area, a temporary storage area for component blocks, a detritium removal area, a preparation area for detritium-removed solid waste, a storage area for tritium-containing cleaning materials, and a new fuel hoisting and transfer area.

4. The composite heat chamber according to claim 3, characterized in that, The first maintenance layer (4) includes a heavy-duty robotic arm, a maintenance platform storage and maintenance area in a vacuum chamber, a cladding refurbishment and testing area, a maintenance cladding temporary storage area, a divertor storage area, a divertor repair and testing area, a repaired divertor storage area, and a new fuel hoisting channel.

5. The composite heat chamber according to claim 4, characterized in that, The second maintenance layer (5) includes a diagnostic device, a heating device storage and maintenance area; a maintenance workshop remote control equipment storage and maintenance area; and an auxiliary system layout area including: a hot chamber ventilation system layout area, a maintenance workshop auxiliary system layout area, and a control room for hot chamber remote operation.

6. The composite hot chamber according to any one of claims 1-5, characterized in that, The wall thickness shall not be less than 100cm.

7. A method of using a composite hot chamber, characterized in that, Includes the following steps: The components are classified in the initial processing layer (1); before the component classification step in the initial processing layer (1), the components to be processed are transported from the main hall to the first maintenance layer (4) and then hoisted to the initial processing layer (1) through the first hoisting layer (3); For core components, they are turned over and cleaned in the initial treatment layer (1). After cleaning, they are cleaned and decontaminated, and damaged. After passing the test, they are hoisted to the maintenance treatment layer for repair. Components that fail the test are hoisted to the decommissioning treatment layer (2) for subsequent decommissioning operations. Components that pass the test are hoisted from the first hoisting layer (3) to the first maintenance layer (4) for repair and then transferred back to the main unit hall. For diagnostic devices, heating devices and remote control equipment in the maintenance workshop, after inspection at the initial treatment layer (1), they are hoisted to the maintenance treatment layer for repair. For scrapped parts, they are hoisted to the decommissioning treatment layer (2) for subsequent decommissioning operations. After inspection at the initial treatment layer (1), they are hoisted from the first hoisting layer (3) to the second maintenance layer (5), and then transferred to their respective storage and maintenance areas. After maintenance and passing the test, they are hoisted to the first maintenance layer (4) and transferred back to the main hall. For window plug-ins, cleaning and decontamination and damage detection are carried out in the initial processing layer (1). Components that pass the test are hoisted to the maintenance processing layer for repair. Components that fail the test are hoisted to the decommissioning processing layer (2) for subsequent decommissioning operations. Components that pass the test are hoisted from the first hoisting layer (3) to the first maintenance layer (4) for repair and then transferred back to the main hall. For neutral beam sources, they are directly transported and hoisted to the decommissioning treatment layer (2) for decommissioning operations; they are directly transported and hoisted to the decommissioning treatment layer (2) from the second hoisting layer (6).

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