Sampling device and sampling method

Abstract

The invention relates to the technical field of nuclear equipment. The invention provides a sampling device and a sampling method. The sampling device comprises a supporting assembly, a moving execution assembly and a sampling assembly, the supporting assembly is used for being connected with the reactor pressure vessel, the moving execution assembly is connected with the supporting assembly, part of the structure of the moving execution assembly is located on the outer side of the reactor pressure vessel, and the moving execution assembly is provided with a moving end stretching into the reactor pressure vessel. The sampling assembly is located in the reactor pressure vessel and comprises a connecting part, a sampling part and a counteracting part, the connecting part is connected with the moving end, the counteracting part and the sampling part are both connected with the connecting part, the counteracting part and the sampling part are both movable relative to the reactor pressure vessel under the driving of the moving end, and the sampling part is used for drilling a sampling object; the counteracting part is used for adsorbing and fixing with the inner wall of the reactor pressure vessel so as to counteract the counter-acting force generated by drilling of the sampling part. Therefore, the drilling and sampling operation can be finished on the original site before disassembly.

Description

Technical Field

[0001] This invention relates to the field of nuclear equipment technology, and more specifically, to a sampling device and sampling method. Background Technology

[0002] The reactor pressure vessel and in-core components are the core radioactive structural components of a nuclear reactor. Their decommissioning and disposal require accurate data on material composition and nuclide distribution before waste sorting, packaging, and final disposal can be carried out.

[0003] Currently, the main technologies for handling reactor pressure vessels and in-core components involve cutting and dismantling followed by overall packaging. Large structural components such as reactor pressure vessels and in-core components are cut into several large pieces or segments that are easy to transport and dispose of. The cut components or the remaining intact components are then sealed and packaged to ensure safe transportation and disposal.

[0004] However, this involves large-scale dismantling operations, and the dismantling equipment used has a large overall structure, making it difficult to operate within the confined space of the reactor. Furthermore, the dismantling operation has low precision, and the cut products cannot meet the fine sample requirements for radionuclide analysis, let alone allow for sampling before or at the original site. Summary of the Invention

[0005] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a sampling device is provided. The sampling device includes: Support assembly, used for connection to reactor pressure vessel; A mobile actuator assembly, connected to a support assembly, with a portion of its structure located outside the reactor pressure vessel, and having a movable end extending into the reactor pressure vessel; and The sampling assembly is located inside the reactor pressure vessel. The sampling assembly includes a connecting part, a sampling part, and a counteracting part. The connecting part is connected to the moving end. Both the counteracting part and the sampling part are connected to the connecting part. Both the counteracting part and the sampling part are movable relative to the reactor pressure vessel under the drive of the moving end. The sampling part is used to drill the sampling object, and the counteracting part is used to adhere and fix to the inner wall of the reactor pressure vessel to counteract the reaction force generated by the drilling of the sampling part.

[0006] For example, the sampling unit includes a first moving member, a second moving member, and a sampling member. The first moving member is connected to the connecting part, and the second moving member is connected between the first moving member and the sampling member. The first moving member drives the second moving member and the sampling member to rotate together around the axis, and the second moving member drives the sampling member to move in a direction perpendicular to the axis.

[0007] For example, the second moving component includes a mounting plate, a guide rail, a slide table, and a driving component. The mounting plate is connected to the first moving component, the guide rail is disposed on the mounting plate, the slide table is slidably connected to the guide rail, the slide table is connected to the sampling component, and the output end of the driving component is connected to the slide table. Under the drive of the driving component, the slide table drives the sampling component to move.

[0008] For example, the sampling component includes a drill bit and a drive mechanism that drives the drill bit to work. The drive mechanism is connected to a slide table. The drill bit includes a drill-boring integrated tool and / or a core drill.

[0009] For example, the sampling unit includes a sample collection component, which includes a telescopic cover and an elastic element. The telescopic cover encloses a sealed space, and the drilling end of the drilling component is located within the sealed space. The elastic element applies a force to the telescopic cover so that the telescopic cover abuts against the sampling object.

[0010] For example, a connecting frame is provided on the outer periphery of the drive mechanism, and a telescopic guide post is provided on the connecting frame. An elastic element is sleeved on the outer periphery of the telescopic guide post. The telescopic cover includes a telescopic cylinder and a sealing cover. The telescopic cylinder is connected to the end of the telescopic guide post away from the connecting frame, and the sealing cover is connected to the end of the telescopic cylinder away from the telescopic guide post. The end of the sealing cover away from the telescopic cylinder has an opening. The inner diameter of the sealing cover gradually increases from the opening towards the telescopic cylinder. A suction tube is connected to the side wall of the sealing cover. The suction tube is connected to the sealing space. A sealing ring surrounding the opening is provided on the side of the sealing cover facing the sampling object.

[0011] For example, the suction pipe is connected to a pump body, and a filter assembly is provided between the pump body and the suction pipe. Both the pump body and the filter assembly are located outside the reactor pressure vessel.

[0012] For example, the filter assembly includes a filter housing, a filter screen, and a filter cover. The inlet of the filter housing is connected to a suction pipe, and the outlet of the filter housing is connected to a pump body. The filter screen is disposed inside the filter housing and is located between the inlet and the outlet to filter the flowing waste liquid. The top of the filter housing has a disassembly port, and the filter cover is closable on the top of the filter housing to expose or block the disassembly port.

[0013] For example, the mobile execution component includes a mounting frame and a moving part. The mounting frame is connected to a support component, and the moving part is connected to the mounting frame. A moving end is formed at the end of the moving part. The moving part drives the sampling component to move relative to the reactor pressure vessel in a first direction, a second direction, and a third direction. The moving part also drives the sampling component to rotate within a predetermined plane. The first direction, the second direction, and the third direction satisfy the perpendicularity condition in each pair, and the predetermined plane satisfies the perpendicularity condition with the third direction.

[0014] According to another aspect of the present invention, a sampling method is also provided. This sampling method uses any of the above-described sampling devices to sample the object.

[0015] The sampling device provided in this application has its sampling components located inside the reactor pressure vessel. It allows for drilling and sampling operations to be completed on-site before dismantling, effectively solving the problems of existing dismantling devices being large and difficult to operate in confined spaces. Furthermore, it eliminates the need for cutting and dismantling the reactor pressure vessel and its internal components. The counteracting part adheres and is fixed to the inner wall of the reactor pressure vessel, offsetting the drilling reaction force and ensuring the stability and reliability of the drilling process. Compared to dismantling, the drilling and sampling process is more controllable, and the obtained samples better meet the requirements for nuclide analysis, ensuring the accuracy of subsequent analytical results.

[0016] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to limit the scope of protection of the claimed technical solution.

[0017] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures, Figure 1 A schematic diagram of a sampling device and a reactor pressure vessel according to an exemplary embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a sampling component according to an exemplary embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the second moving member according to an exemplary embodiment of the present invention; Figure 4 A schematic diagram of a sampling device and a reactor pressure vessel according to an exemplary embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a sample collection device according to an exemplary embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a filter assembly according to an exemplary embodiment of the present invention.

[0019] The above figures include the following reference numerals: 1. Moving actuator; 2. Reactor pressure vessel; 3. Sampling assembly; 4. Connecting part; 5. First moving part; 6. Second moving part; 7. Drive mechanism; 8. Sample collection part; 9. Drilling part; 10. Counteracting part; 11. Guide rail; 12. Mounting plate; 13. Slide table; 14. Reducer; 15. Servo motor; 16. Centrifugal pump; 17. Filter screen; 18. Vacuum pump; 19. Sample receiving device; 20. Suction tube; 21. Sealing ring; 22. Telescopic cylinder; 23. Elastic element; 24. Inlet pipe; 25. Filter cover; 26. Filter housing; 27. Outlet pipe. Detailed Implementation

[0020] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0021] This invention provides a sampling device. This sampling device can be used to sample reactor pressure vessels and / or in-core components. (Refer to reference...) Figure 1 and Figure 2 The sampling device includes a support assembly, a moving actuator 1, and a sampling assembly 3. The support assembly connects to the reactor pressure vessel 2, providing a mounting base for the moving actuator 1 and the sampling assembly 3. The moving actuator 1 is connected to the support assembly, with a portion of its structure located outside the reactor pressure vessel 2. The moving actuator 1 has a moving end extending into the reactor pressure vessel 2. A portion of the moving actuator 1 is located outside the reactor pressure vessel 2, and a portion is located inside the reactor pressure vessel 2. The sampling assembly 3 is located inside the reactor pressure vessel 2 and includes a connecting part 4, a sampling part, and a counteracting part 10. The connecting part 4 is connected to the moving end, and both the counteracting part 10 and the sampling part are connected to the connecting part 4. Both the counteracting part 10 and the sampling part are movable relative to the reactor pressure vessel 2 under the drive of the moving end. The sampling part is used to drill the sampling object, i.e., to obtain the sampling object through drilling for subsequent analysis. The counteracting part 10 is used to adhere and fix itself to the inner wall of the reactor pressure vessel 2 to counteract the reaction force generated by the drilling of the sampling part. Specifically, the connecting part 4 can be a connecting bracket, with one end connected to the moving end and the other end connected to the sampling part and the offsetting part 10. Alternatively, the offsetting part 10 can be directly connected to the connecting part 4, or it can be connected through a part of the structure of the sampling part. For example, in an embodiment where the sampling part includes a mounting plate 12, the offsetting part 10 can be connected to the mounting plate 12. It is understood that the reactor pressure vessel 2 in this application is decommissioned.

[0022] When the device is running, the support assembly is assembled and fixed with the reactor pressure vessel 2. The moving execution assembly 1 drives the sampling assembly 3 to move to the sampling point through the moving end. Then, the offsetting part 10 is adsorbed and fixed to the inner wall of the reactor pressure vessel 2. The sampling part performs drilling sampling operation on the sampling object. The reaction force generated by drilling is balanced and offset by the offsetting part 10.

[0023] The sampling device provided in this application has a sampling component 3 located inside the reactor pressure vessel 2. This allows for drilling and sampling operations to be completed on-site before dismantling, effectively solving the problems of existing dismantling devices being large and difficult to operate in confined spaces. Furthermore, it eliminates the need to cut and dismantle the reactor pressure vessel 2 and its internal components. The counteracting part 10 adheres and is fixed to the inner wall of the reactor pressure vessel 2, counteracting the drilling reaction force and ensuring the stability and reliability of the drilling process. Compared to dismantling, the drilling and sampling process is more controllable, and the obtained samples better meet the requirements for nuclide analysis, ensuring the accuracy of subsequent analytical results.

[0024] It is understandable that the reaction forces that the sampling device bears during underwater drilling operations mainly include the drilling feed force, the drilling cutting resistance, and the vibration and impact reaction force generated during the drilling process.

[0025] For example, the offsetting part 10 can be a suction cup. Specifically, there can be four sets of suction cups. The offsetting part 10 can be connected to a water ring vacuum pump 18, which can draw air to create a vacuum inside the offsetting part 10, so as to better adhere to the inner wall of the reactor pressure vessel 2. Further, the offsetting part 10 can be an accordion suction cup to better adapt to different curved surfaces for adsorption.

[0026] For example, in conjunction with reference Figure 2 and Figure 3The sampling unit includes a first moving member 5, a second moving member 6, and a sampling member. The first moving member 5 is connected to the connecting part 4, and the second moving member 6 is connected between the first moving member 5 and the sampling member. The first moving member 5 drives the second moving member 6 and the sampling member to rotate together around an axis, and the second moving member 6 drives the sampling member to move in a direction perpendicular to the axis. In other words, the sampling unit can rotate around an axis and move in a direction perpendicular to the axis. The axis and the direction perpendicular to the axis can be understood as follows: the axis can be perpendicular to a horizontal plane, and the direction perpendicular to the axis is any horizontal direction. That is, the sampling unit can rotate on a horizontal plane and move in a horizontal direction. The first moving member 5 realizes the rotation of the sampling member, and the second moving member 6 realizes the linear motion of the sampling member. The rotation of the sampling member by the first moving member 5 can adjust the angle of the sampling member to make it perpendicular to the surface of the object being sampled. The linear motion of the sampling member by the second moving member 6 can also be understood as linear feed, used for gradual advancement during the drilling process. In this way, the first moving component 5 drives the sampling component to rotate, adjusting its angle to ensure it remains perpendicular to the surface of the object being sampled. The second moving component 6 drives the sampling component in a linear feed motion, enabling gradual cutting during drilling. This allows for precise multi-directional adjustment of the sampling component within the reactor pressure vessel 2, improving the positioning accuracy and operational flexibility of drilling and sampling. It better adapts to the operational needs of different sampling positions within confined spaces, while ensuring a stable and reliable drilling process, thus improving sampling quality and effectiveness. For example, the sampling device may also include a video monitoring module. Through this module, the first and second moving components 5 and 6 can be observed and controlled to ensure the sampling component's position and angle are more suitable. The first moving component 5 drives the sampling component to rotate, allowing the sampling device to better drill and sample curved structures. The video monitoring module can perform underwater video monitoring operations. The sampling device may also include an alarm and monitoring module, which can collect and feed back the operating parameters and working status information of the moving actuator 1, sampling unit, drive mechanism 7, pump body, filter assembly and offset unit 10 to the control system in real time. When the device encounters abnormalities or malfunctions during drilling, feeding, suction, filtering or adsorption fixation and other operations, it can issue an alarm signal in time and automatically stop operation to ensure the safety and reliability of the sampling operation.

[0027] For example, in conjunction with reference Figure 2 and Figure 3The second moving component 6 includes a mounting plate 12, a guide rail 11, a slide table 13, and a driving component. The mounting plate 12 is connected to the first moving component 5. The guide rail 11 is mounted on the mounting plate 12. The slide table 13 is slidably connected to the guide rail 11 and is connected to the sampling component. The output end of the driving component is connected to the slide table 13. Driven by the driving component, the slide table 13 moves the sampling component. The driving component may include a reducer 14 and a servo motor 15. The servo motor 15 can drive the slide table 13 to move, and the reducer 14 can reduce the movement of the slide table 13. The slide table 13 is movable relative to the mounting plate 12 and the reactor pressure vessel 2. The sampling component connected to the slide table 13 moves relative to the reactor pressure vessel 2, that is, adjusting the distance between the sampling component and the inner wall of the reactor pressure vessel 2 to achieve preliminary tool setting of the sampling point. Afterwards, precise tool setting can be completed with the help of intelligent control of the device. The extension direction of the guide rail 11 is perpendicular to the axis, which is also the movement direction of the sampling component. In this way, the driving component drives the slide 13 to slide stably along the guide rail 11, thereby driving the sampling component to move smoothly. This ensures smooth movement and accurate positioning of the sampling component during linear feed, improving the stability and reliability of drilling and sampling, and making the feeding movement of the sampling component within the reactor pressure vessel 2 more precise and controllable. For example, the second moving component 6 can be a ball screw. For example, the first moving component 5 can include an electric rotary table.

[0028] For example, in conjunction with reference Figure 2 and Figure 3 The sampling components include a drill bit 9 and a drive mechanism 7 that drives the drill bit 9. The drive mechanism 7 is connected to a slide table 13. The drill bit 9 includes a drill-boring integrated tool and / or a core drill. The drill-boring integrated tool can be used to obtain debris samples. The core drill can be used to obtain core samples. The drill-boring integrated tool can perform both drilling and boring, ensuring the dimensional accuracy and surface quality of the sampling hole. The core drill can cut a complete core sample from the sampling object, facilitating subsequent radionuclide analysis. The drill bit 9 and the drive mechanism 7 are detachably connected to facilitate the installation of different types of drill bits 9 for sampling. The drill bit 9 and the drive mechanism 7 can be connected using a quick-connect structure. For example, the alignment and tool setting of the drill bit 9 can be achieved using an underwater camera equipped with illumination. Specifically, the machining diameter of the integrated drilling and boring tool can be set to 45-50mm, enabling one-time drilling and forming, so that the sampling area meets the requirement of being greater than 10cm²; the core drill has a diameter of φ25 and a cutting length of 100, and can penetrate and drill through a wall thickness of 35mm.

[0029] For example, in conjunction with reference Figure 2 and Figure 5The sampling unit includes a sample collection component 8, which comprises a telescopic cover and an elastic element 23. The telescopic cover encloses a sealed space, and the drilling end of the drill bit 9 is located within this sealed space. The elastic element 23 applies a force to the telescopic cover to ensure that the cover is in contact with the sampled object. The telescopic cover is telescopic. The telescopic direction can be the same as the feed direction of the drill bit 9, or it can be telescopic along a predetermined direction. The telescopic cover compresses synchronously during feed and extends synchronously during retraction. The drilling end can be understood as the end that contacts the part to be drilled 9, such as a cutting head. The sealed space prevents the diffusion of debris and dust generated during drilling and sampling, avoiding contamination of the internal environment of the reactor pressure vessel 2. The elastic element 23 provides a continuous force to the telescopic cover, ensuring that it remains in close contact with the sampled object and guaranteeing the sealing and stability of the sealed space. This design collects debris and dust generated during drilling, preventing the diffusion of radioactive contaminants, and provides a stable sealed environment for drilling operations, improving the safety and cleanliness of the sampling process.

[0030] For example, in conjunction with reference Figure 2 and Figure 5A connecting frame is provided around the outer periphery of the drive mechanism 7. The connecting frame has a hollowed-out center, allowing part of the drive mechanism 7 to extend into the telescopic cover through the hollowed-out structure. A telescopic guide post is provided on the connecting frame, which can extend and retract in a predetermined direction. An elastic element 23 is sleeved around the outer periphery of the telescopic guide post. The telescopic cover includes a telescopic cylinder 22 and a sealing cover. The telescopic cylinder 22 is connected to the end of the telescopic guide post away from the connecting frame, and the sealing cover is connected to the end of the telescopic cylinder 22 away from the telescopic guide post. The end of the sealing cover away from the telescopic cylinder 22 has an opening, and the inner diameter of the sealing cover gradually increases from the opening towards the telescopic cylinder 22. A suction pipe 20 is connected to the side wall of the sealing cover, and the suction pipe 20 communicates with the sealing space. A sealing ring 21 surrounding the opening is provided on the side of the sealing cover facing the sampling object. It can be understood that the predetermined direction is the same as the direction of movement of the drive mechanism 7 during drilling, and also the same as the direction of movement of the slide table 13. The connecting frame provides a mounting base for the telescopic guide column. Extending in a predetermined direction, the telescopic guide column can extend and retract during the drilling feed process, guiding and limiting the movement of the telescopic cover. An elastic element 23 is fitted around the outer periphery of the telescopic guide column, continuously providing elastic thrust as the telescopic guide column extends and retracts, ensuring the telescopic cover remains in close contact with the sampling object. The telescopic cover includes a telescopic cylinder 22 and a sealing cover. The telescopic cylinder 22 extends and deforms synchronously with the telescopic guide column. The sealing cover has an opening at the end furthest from the telescopic cylinder 22, and its inner diameter gradually increases from the opening towards the telescopic cylinder 22, giving the sealing cover a frustum shape. This design allows drilling chips to be collected more concentratedly within the sealing cover, facilitating subsequent discharge through the suction pipe 20 and improving chip collection efficiency. The sealing ring 21 surrounding the opening on the sealing cover further enhances the sealing effect. The suction pipe 20 is connected to the sealed space, allowing for timely discharge of drilling chips. During drilling feed, the telescopic guide column and telescopic cylinder 22 gradually retract as the sampling component advances, while the sealing cover and sealing ring 21 maintain a sealed fit at all times, ensuring the closure of the sealed space and the stability and reliability of the drilling process, preventing the spread of radioactive contaminants, and improving the safety and cleanliness of the sampling operation. The sealing ring 21 can be made of rubber.

[0031] With the cooperation of the filtration component and sampling component 3, the sampling device can separate, filter, and collect drilling debris samples in real time, preventing the drilling debris from spreading and mixing in the water. When there are multiple sampling points, the drilling debris generated at each sampling point can be independently aspirated and collected, preventing the debris remaining at the previous sampling point from mixing with the new sample at the next sampling point, avoiding cross-contamination between samples from different sampling points, and ensuring the purity, representativeness, and accuracy of each sample. After the sampling and collection of samples at the same location is completed, the sampling device can be moved to the next sampling location, and the sampling steps can be repeated to complete the sampling work at all points in sequence. The entire process can be completed remotely. The samples separated from the drilling debris are directly transported to the shielded container at the pool edge. While effectively ensuring the safety of personnel and environmental radiation, the sampling efficiency is significantly improved, overcoming the technical difficulty of obtaining samples from the decommissioned reactor pressure vessel 2 and in-core components.

[0032] In the above embodiment, the connecting frame is connected to the drive mechanism 7 and moves together with the drive mechanism 7. In another embodiment, the sampling part may include a main frame, the connecting part 4, the sampling part and the offsetting part 10 are all connected to the main frame, the connecting frame is connected to the main frame, and the telescopic cover, the elastic element 23 and the telescopic guide column can move relative to the drive mechanism 7 together. During the drilling feed, the drive mechanism 7 and the drilling part 9 advance forward, while the elastic element 23, the connecting frame, the telescopic guide column and the telescopic cover remain stationary relative to the sampling object and do not advance with the sampling part. The telescopic cover always maintains a sealed contact with the sampling object.

[0033] In the above embodiment, the elastic element 23 applies force to the sealing cover via the telescopic cylinder 22. In an embodiment not shown, the elastic element 23 may be directly connected to the sealing cover and apply force.

[0034] For example, in conjunction with reference Figure 4 and Figure 6 The suction pipe 20 is connected to the pump body, and a filter assembly is installed between the pump body and the suction pipe 20. Both the pump body and the filter assembly are located outside the reactor pressure vessel 2. During drilling and sampling, the pump body can create a negative pressure suction inside the sealed cover through the suction pipe 20, drawing out debris and dust from the sealed space. The filter assembly can filter and separate the extracted waste liquid, achieving debris collection and media recirculation. The location of the pump body and filter assembly outside the reactor pressure vessel 2 facilitates maintenance and replacement, avoids occupying the limited space inside the reactor pressure vessel 2, and improves the efficiency of debris discharge and collection, further ensuring the cleanliness and safety of the sampling process. The separate arrangement of the pump body and sampling assembly 3 effectively reduces the volume and weight of the sampling assembly 3. Filtering and collecting debris samples through suction reduces sample residue in the pipeline, significantly improving the ease of sample retrieval and equipment maintainability.

[0035] For example, in conjunction with reference Figure 4 and Figure 6 The filter assembly includes a filter housing 26, a filter screen 17, and a filter cover 25. The inlet of the filter housing 26 is connected to a suction pipe 20, and the outlet of the filter housing 26 is connected to a pump body. The filter screen 17 is disposed inside the filter housing 26, located between the inlet and outlet to filter the flowing waste liquid. The top of the filter housing 26 has a disassembly port, and the filter cover 25 is detachably disposed on the top of the filter housing 26 to expose or block the disassembly port. The filter screen 17 is detachably disposed inside the filter housing 26. When the filter cover 25 is open, the filter screen 17 can be disassembled through the exposed disassembly port. When the filter cover 25 is closed, it ensures the closure of the filter housing 26. The filter screen 17 can intercept and filter the waste liquid and debris generated during drilling. The disassembly port on the top of the filter housing 26, combined with the detachable filter cover 25, allows for easy opening of the disassembly port to clean or replace the filter screen 17. The overall structure is simple, effectively achieving waste liquid filtration and debris collection, and improving the convenience of maintenance operations. Specifically, the filter housing 26 includes an inlet pipe 24 and an outlet pipe 27. The inlet pipe 24 connects to the suction pipe 20, and the outlet pipe 27 connects to the pump body. Vertically, the inlet pipe 24 is higher than the outlet pipe 27, and the height of the filter screen 17 is between the inlet pipe 24 and the outlet pipe 27. Exemplarily, the pump body includes a vacuum pump 18 and a centrifugal pump 16. The outlet pipe 27 has a first outlet and a second outlet. The first outlet connects to the vacuum pump 18, and the second outlet connects to the centrifugal pump 16. In one embodiment, the centrifugal pump 16 may be located at the bottom of an underwater pool, and the filter housing 26 may be installed on the shore. The centrifugal pump 16 and the filter housing 26 are connected by a corrugated pipe. In one embodiment, the sampling device includes a sample receiving device 19 for receiving the acquired sample.

[0036] For example, in conjunction with reference Figure 1 and Figure 2 The mobile execution component 1 includes a mounting frame and a moving part. The mounting frame is connected to a support component, and the moving part is connected to the mounting frame. A moving end is formed at the end of the moving part. The moving part drives the sampling component 3 to move relative to the reactor pressure vessel 2 in a first direction, a second direction, and a third direction. The moving part also drives the sampling component 3 to rotate within a predetermined plane. The first direction, the second direction, and the third direction are mutually perpendicular, and the predetermined plane is perpendicular to the third direction. Specifically, the moving end of the moving part is connected to a connecting part 4. The mobile execution component 1 can drive the sampling component 3 to move along the x-axis, y-axis, and z-axis. The predetermined plane can be a horizontal plane. The mobile execution component 1 moves the sampling component 3 to the sampling position. The mobile execution component 1 can drive the sampling component 3 to perform three-dimensional movement and planar rotation, realizing multi-degree-of-freedom adjustment of the sampling component 3 in space, effectively improving the positioning accuracy and adjustment flexibility of the sampling position, and better adapting to the confined and complex environment inside the reactor pressure vessel 2.

[0037] For example, refer to Figure 1 The support assembly includes a cover plate, which is installed over the opening of the reactor pressure vessel 2. Part of the structure of the mobile actuator 1 is located above the cover plate. The cover plate, when closed over the opening of the reactor pressure vessel 2, can seal and protect the internal environment of the vessel and provide a stable and reliable support foundation for the mobile actuator 1.

[0038] This sampling device can perform remote, automated underwater operations on reactor pressure vessel 2 and cylindrical in-core components, completing the drilling and separation of debris samples and the extraction of core samples. The entire process requires no close-range personnel operation, effectively ensuring personnel radiation safety.

[0039] According to another aspect of the present invention, a sampling method is also provided. This sampling method can use any of the sampling devices described above to sample the object. Since this sampling device employs the technical solutions of any of the above embodiments, the sampling method at least has the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0040] For example, the sampling method may include three stages: interface connection, pre-drilling preparation, drilling, and sample collection.

[0041] Interface connections may include: The connecting part 4 of the moving execution component 1 and the sampling component 3 is bolted together. The moving execution component 1 can drive the sampling component 3 to move linearly in the X, Y and Z directions, and can also be rotated in the horizontal plane. Connect the suction pipe 20 on the sampling section sealing cover in series with the inlet and outlet of the pool-side pump body and the filter assembly to form a complete suction circuit; A drilling component 9 is installed at the quick interface of the sampling section drive mechanism 7. The drilling component 9 can be a drill-boring integrated tool or a core drill. According to the preset sampling points, the sampling component 3 is moved to the target sampling position by the remote control mobile execution component 1. Depending on the sampling object, the clamping cylinder and basket-type components are drilled from the outside to the inside, while the decommissioned reactor pressure vessel 2 and the internal and external heat shield components are drilled from the inside to the outside.

[0042] Preparing conditions before drilling may include: Install and debug the sampling device, and prepare underwater lighting, reactor pressure vessel 2, video monitoring module and related tools and equipment to be in place; The telescopic cover is made to fit tightly against the wall of reactor pressure vessel 2, forming a sealed space inside the telescopic cover to prevent debris from spreading out during drilling. The video monitoring module monitors and controls the first moving part 5 to drive the drilling part 9 to swing in the plane, and adjusts the angle to keep the drilling part 9 perpendicular to the surface to be sampled. The drive component controlling the second moving part 6 decelerates the slide table 13 and moves it slowly along the guide rail 11 to adjust the distance between the drilling part 9 and the wall of the reactor pressure vessel 2, completing the initial tool setting of the sampling point, and then performing precise tool setting through intelligent control of the device.

[0043] Drilling and sample collection may include: Turn on the pump body to pre-run the filter assembly and the suction inside the telescopic shroud, establish a stable flow field, and provide conditions for debris suction. The control drive mechanism 7 drives the drill bit 9 to rotate at high speed to perform drilling and sampling operations. Simultaneously, the counteracting part 10 is activated to adsorb and fix it to the inner wall of the reactor pressure vessel 2, balancing and counteracting the axial feed force, cutting resistance and vibration impact reaction force generated during the drilling process, and controlling the second moving part 6 to feed smoothly. During drilling, the pump body pumps water and debris from the sealed space to the filter assembly through the suction pipe 20. Solid-liquid separation is achieved by the filter screen 17. The operator can observe the sampling depth and sample collection status in real time through the control system. After sampling at the current depth is completed, continue suction for a period of time to ensure that there is no sample residue in the pipeline and sealed space; The filter cover 25 of the filter assembly is opened remotely, and the filter screen 17 along with the debris sample is taken out and transferred to the sample receiving shielded container for temporary storage. After sampling at a specified depth at a certain location, the second moving part 6 can be adjusted again through the remote control system to continue sampling at the next depth. If it is necessary to change the sampling position, the drilling part 9 is retracted and the sampling component 3 is moved to the next point to start a new round of sampling cycle. Repeat the drilling and collection steps described above until sampling is completed at all preset locations of reactor pressure vessel 2 and reactor internal components.

[0044] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0045] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device, characterized in that, include: Support assembly for connection to reactor pressure vessel; A mobile execution component is connected to the support component, a portion of the structure of the mobile execution component is located outside the reactor pressure vessel, and the mobile execution component has a movable end that extends into the reactor pressure vessel; as well as A sampling assembly is located inside the reactor pressure vessel. The sampling assembly includes a connecting part, a sampling part, and a counteracting part. The connecting part is connected to the moving end. Both the counteracting part and the sampling part are connected to the connecting part. Both the counteracting part and the sampling part are movable relative to the reactor pressure vessel under the drive of the moving end. The sampling part is used to drill the sampling object. The counteracting part is used to adhere and fix to the inner wall of the reactor pressure vessel to counteract the reaction force generated by the drilling of the sampling part.

2. The sampling device according to claim 1, characterized in that, The sampling unit includes a first moving component, a second moving component, and a sampling component. The first moving component is connected to the connecting part, and the second moving component is connected between the first moving component and the sampling component. The first moving component drives the second moving component and the sampling component to rotate together around the axis, and the second moving component drives the sampling component to move in a direction perpendicular to the axis.

3. The sampling device according to claim 2, characterized in that, The second moving component includes a mounting plate, a guide rail, a slide table, and a driving component. The mounting plate is connected to the first moving component. The guide rail is disposed on the mounting plate. The slide table is slidably connected to the guide rail and is connected to the sampling component. The output end of the driving component is connected to the slide table. Under the drive of the driving component, the slide table moves the sampling component.

4. The sampling device according to claim 3, characterized in that, The sampling component includes a drilling component and a driving mechanism for driving the drilling component. The driving mechanism is connected to the slide table. The drilling component includes an integrated drilling and boring tool and / or a core drill.

5. The sampling device according to claim 4, characterized in that, The sampling unit includes a sample collection component, which includes a telescopic cover and an elastic element. The telescopic cover encloses a sealed space, and the drilling end of the drilling component is located within the sealed space. The elastic element applies a force to the telescopic cover so that the telescopic cover abuts against the sampling object.

6. The sampling device according to claim 5, characterized in that, A connecting frame is provided on the outer periphery of the driving mechanism, and a telescopic guide post is provided on the connecting frame. The elastic element is sleeved on the outer periphery of the telescopic guide post. The telescopic cover includes a telescopic cylinder and a sealing cover. The telescopic cylinder is connected to the end of the telescopic guide post away from the connecting frame. The sealing cover is connected to the end of the telescopic cylinder away from the telescopic guide post. The end of the sealing cover away from the telescopic cylinder has an opening. The inner diameter of the sealing cover gradually increases from the opening towards the telescopic cylinder. A suction tube is connected to the side wall of the sealing cover. The suction tube is connected to the sealing space. A sealing ring surrounding the opening is provided on the side of the sealing cover facing the sampling object.

7. The sampling device according to claim 6, characterized in that, The suction pipe is connected to a pump body, and a filter assembly is provided between the pump body and the suction pipe. Both the pump body and the filter assembly are located outside the reactor pressure vessel.

8. The sampling device according to claim 7, characterized in that, The filtration assembly includes a filter housing, a filter screen, and a filter cover. The inlet of the filter housing is connected to the suction pipe, and the outlet of the filter housing is connected to the pump body. The filter screen is disposed inside the filter housing and is located between the inlet and the outlet to filter the flowing waste liquid. The top of the filter housing has a disassembly port, and the filter cover is closable on the top of the filter housing to expose or block the disassembly port.

9. The sampling device according to claim 1, characterized in that, The mobile execution component includes a mounting frame and a movable component. The mounting frame is connected to the support component, and the movable component is connected to the mounting frame. The movable end is formed at the end of the movable component. The movable component drives the sampling component to move relative to the reactor pressure vessel in a first direction, a second direction, and a third direction. The movable component also drives the sampling component to rotate within a predetermined plane. The first direction, the second direction, and the third direction are perpendicular to each other, and the predetermined plane is perpendicular to the third direction.

10. A sampling method, characterized in that, The sampling object is sampled using the sampling device as described in any one of claims 1 to 9.

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