Nuclear power plant contaminated metal waste automatic laser decontamination system and method

Abstract

The present application belongs to the field of nuclear facility decommissioning and waste treatment, and particularly relates to a nuclear power plant contaminated metal waste automatic laser decontamination system and method. The system places the decontamination / cutting workbench on the decontamination object through the decontamination / cutting workbench; the decontamination / cutting workbench is transported to each work station and operation table through the transfer trolley; the transfer trolley is controlled through the operation table, the operation of the workpiece turnover device is controlled, the size of the decontamination object is measured, and the surface contamination level and radiation level of the decontamination object before and after decontamination are measured; the measurement results are recorded by the controller, the cutting parameters and decontamination process parameters of the decontamination object are preset, and the laser cutting device, laser cleaning device and laser stripping device are controlled to perform laser cutting and automatic laser decontamination operation. The present application can effectively reduce the labor intensity of personnel, reduce the radiation dose of personnel, improve the decontamination work efficiency, realize the waste degradation or clean control of the surface contaminated metal waste, and further realize waste minimization.

Description

Technical Field

[0001] This invention belongs to the field of nuclear facility decommissioning and waste treatment technology, specifically relating to an automatic laser decontamination system and method for contaminated metal waste from nuclear power plants. Background Technology

[0002] The radioactive metal waste generated during the operation and decommissioning of nuclear power plants is diverse and has complex source and material characteristics. Most of the contaminated metals are surface-contaminated, which can be cleaned, decontaminated, or recycled through appropriate decontamination methods, saving on radioactive waste disposal costs. However, conventional decontamination methods are difficult to use to achieve clean treatment of contaminated metal waste. The decontamination of large quantities of surface-contaminated radioactive metal waste involves high levels of labor intensity and exposure to high radiation doses.

[0003] Laser decontamination is a newly emerging and advantageous decontamination technology in recent years, capable of efficiently decontaminating most types of metal waste and offering significant advantages in waste degradation and clean disposal. However, for the engineered decontamination of radioactive metal waste, single-method laser decontamination often fails to achieve the final decontamination target due to a limited number of items, thus restricting its adaptability and economic efficiency. Furthermore, laser decontamination generates radioactive aerosols, posing significant hazards to personnel and the environment.

[0004] Therefore, the treatment of radioactive metal waste from nuclear power plants requires the development of an automated laser decontamination system suitable for contaminated metal waste from nuclear power plants, based on the characteristics of its source items, to achieve decontamination of large quantities of radioactive metal items while reducing harm to personnel and the environment. Summary of the Invention

[0005] The purpose of this invention is to provide an automated laser decontamination system and method for contaminated metal waste from nuclear power plants. This system uses laser decontamination as its core, combined with cutting, detection, and other types of decontamination methods, to automatically decontaminate large quantities of radioactive contaminants with complex surface structures. This avoids personnel having to perform decontamination work at close range in radioactive areas for extended periods, reduces labor intensity, decreases radiation dose to personnel, and improves decontamination efficiency. It also enables the downgrading or clean release of surface-contaminated metal waste, further minimizing waste.

[0006] Technical solution to achieve the purpose of this invention:

[0007] An automatic laser decontamination system for contaminated metal waste from nuclear power plants, the system comprising: a laser cutting station, a laser cutting device, a controller, a laser cleaning device, a laser cleaning station, a laser stripping device, a laser stripping station, a transfer trolley, a decontamination / cutting workbench, an operating table, a workpiece flipping device, a flipping station, and a loading / unloading station.

[0008] The cleaning / cutting workbench is used to place items to be cleaned;

[0009] The transfer trolley is used to transfer the decontamination / cutting workbench to the laser cutting station, laser cleaning station, laser peeling station, flipping station, loading and unloading station or operating table.

[0010] The laser cutting device, in conjunction with the laser cutting station, is used to cut and disassemble the items to be cleaned; the laser cleaning device and the laser stripping device, in conjunction with the laser cleaning station and the laser stripping station respectively, are used to remove contaminants from the surface of the items to be cleaned using laser technology.

[0011] The workpiece flipping device works in conjunction with the flipping station and the loading / unloading station for loading, unloading, and flipping items that need to be cleaned or cut.

[0012] The operating table is connected to the transfer trolley and is used to control the transfer of the transfer trolley. The operating table is also connected to the workpiece flipping device and is used to control the loading, unloading, and flipping operations of the workpiece flipping device.

[0013] The control panel is connected to the controller and is used to measure the size of the object to be cleaned, measure the surface contamination level and radiation level of the object before and after cleaning, and transmit the measurement results to the central control system of the controller.

[0014] The controller is connected to the operating table to record the size of the object to be cleaned, the surface contamination level and radiation level of the object before and after cleaning; the controller is also connected to the laser cutting device, laser cleaning device and laser stripping device to preset the cutting parameters and cleaning process parameters of the object to be cleaned, control the laser cutting device to perform laser cutting according to the preset cutting parameters, and control the laser cleaning device and laser stripping device to perform automatic laser cleaning operations according to the preset cleaning process parameters.

[0015] Furthermore, the system also includes an isolation shed, which is divided into an interior and an exterior. The interior is further divided into a work area and a personnel activity area. Laser cutting stations, laser cutting devices, laser cleaning devices, laser cleaning stations, laser peeling devices, laser peeling stations, and extended stations are arranged in the work area of ​​the isolation shed. Transfer trolleys, decontamination / cutting workbenches, operating tables, workpiece flipping devices, flipping stations, loading and unloading stations, and charging stations are arranged in the personnel activity area of ​​the isolation shed. The controller is located outside the isolation shed.

[0016] Furthermore, the system also includes a partition wall, which divides the interior of the isolation shed into a work area and a personnel activity area. A walking passage is provided between the work area and the personnel activity area for the transport trolley to move between them.

[0017] Furthermore, the system also includes a dust filtration system, which is located outside the isolation shed. The side wall of the working area of ​​the isolation shed is equipped with a regional dust extraction port, which is connected to the dust filtration system to maintain a negative pressure state inside the isolation shed.

[0018] Furthermore, the laser cutting device, laser cleaning device, and laser stripping device are equipped with a fume extraction port at their ends, which is connected to a fume filtration system for collecting the fumes generated during laser operations.

[0019] Furthermore, the system also includes a charging station for charging the transfer trolley. When the transfer trolley's battery is low, it automatically moves to the charging station for charging.

[0020] Furthermore, the system also includes an expansion station, which is a reserved station for adding decontamination processes according to usage requirements.

[0021] An automated laser decontamination method for contaminated metallic waste from nuclear power plants, the method comprising:

[0022] Step 1: Turn on the main power supply of the decontamination system;

[0023] Step 2: Based on the size of the item to be cleaned, preset the cutting parameters through the central control system of the controller; use the workpiece flipping device at the loading and unloading station to place the item to be cleaned on the cleaning / cutting worktable, and the transfer trolley transfers the cleaning / cutting worktable to the operating table. Measure the size of the item to be cleaned. If the size of the item to be cleaned is larger than the preset cutting parameters, proceed to step 3; otherwise, proceed to step 5.

[0024] Step 3: The transfer trolley transfers the cleaning / cutting workbench to the laser cutting station. The central control system of the controller controls the laser cutting device to perform laser cutting according to the preset cutting parameters, cutting the object to be cleaned into objects of preset size.

[0025] Step 4: The transfer trolley transfers the cleaning / cutting workbench to the loading / unloading station, and selects the appropriate items for cleaning;

[0026] Step 5: The transfer trolley transfers the decontamination / cutting workbench to the operating table, measures the surface contamination level and radiation level of the item to be decontaminated before decontamination, and records them into the central control system of the controller.

[0027] Step 6: Based on the shape, material, surface contamination level, and radiation level of the object to be decontaminated, the central control system of the controller presets the decontamination process parameters. The central control system of the controller controls the laser cleaning device and the laser stripping device to perform automatic laser decontamination according to the preset decontamination process parameters. The surface contamination level and radiation level of the object to be decontaminated after laser decontamination are measured and recorded into the central control system of the controller.

[0028] Step 7: The transfer trolley transfers the cleaning / cutting workbench to the flipping station, and the workpiece flipping device is used to flip the items to be cleaned.

[0029] Step 8: Repeat step 6 to complete the cleaning of the item to be cleaned;

[0030] Step 9: The transfer trolley transfers the cleaning / cutting workbench to the loading / unloading station, and uses the workpiece flipping device to unload the cleaned items.

[0031] Step 10: Repeat steps 2-7 to complete the batch cleaning of the items to be cleaned.

[0032] Further, step 6 includes:

[0033] Step 6.1: Based on the shape, material, surface contamination level, and radiation level of the object to be decontaminated, preset the decontamination process parameters through the central control system of the controller;

[0034] Step 6.2: The transfer trolley transfers the decontamination / cutting workbench to the laser cleaning station. The central control system of the controller controls the laser cleaning device to perform laser cleaning operations according to the preset decontamination process parameters.

[0035] Step 6.3: After laser cleaning is completed, the transfer trolley will transfer the decontamination / cutting worktable to the laser stripping station. The central control system of the controller will control the laser stripping device to perform laser stripping operation according to the preset decontamination process parameters.

[0036] Step 6.4: After laser stripping is completed, the transfer trolley will transfer the decontamination / stripping workbench to the operating table, measure the surface contamination level and radiation level of the item to be decontaminated after decontamination, and record them into the central control system of the controller.

[0037] Furthermore, in steps 2-3, the central control system of the controller presets the cutting parameters to 1m×1m. If the size of the item to be cleaned is greater than 1m×1m, the item to be cleaned will be cut and disassembled into items with a size less than 1m×1m.

[0038] The beneficial technical effects of this invention are as follows:

[0039] 1. The present invention provides an automatic laser decontamination system for contaminated metal waste from nuclear power plants, which realizes automatic decontamination of large quantities of surface-contaminated metal waste by setting up an operating table and controller.

[0040] 2. The present invention provides an automatic laser decontamination system for contaminated metal waste from nuclear power plants, which realizes the decontamination and degradation or cleaning and de-control of radioactive surface contaminated metal waste.

[0041] 3. This invention provides an automatic laser decontamination system for contaminated metal waste in nuclear power plants. Through the structural design of a laser cleaning device, laser cleaning station, laser stripping device, laser stripping station, isolation shed, and isolation wall, the system reduces the generation of secondary waste. The laser cleaning device, laser cleaning station, laser stripping device, and laser stripping station decontaminate radioactive surface-contaminated metal waste using a non-contact laser method. The airborne waste generated during the decontamination process is the main source of secondary waste. Because the laser decontamination process does not have direct contact with radioactive waste and does not require water or other media for decontamination, it generates less secondary waste compared to other decontamination methods. The isolation shed and isolation wall form a sealed space, controlling the diffusion of secondary airborne waste. The generated secondary airborne waste is filtered by a dust filtration system, and the filtered gas is reliably discharged, ultimately ensuring the effective collection of secondary waste.

[0042] 4. The present invention provides an automatic laser decontamination system for contaminated metal waste from nuclear power plants, which effectively protects the safety of workers and the environment by setting up a work area and a personnel activity area, as well as by isolating it with a partition wall. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of an automatic laser decontamination system for contaminated metal waste from nuclear power plants, provided by the present invention.

[0044] In the diagram: 1-Laser cutting station; 2-Laser cutting device; 3-Fume filtration system; 4-Controller; 5-Laser cleaning device; 6-Laser cleaning station; 7-Laser peeling device; 8-Laser peeling station; 9-Isolation shed; 10-Isolation wall; 11-Transfer trolley; 12-Decontamination / cutting workbench; 13-Operating table; 14-Workpiece flipping device; 15-Flipping station; 16-Loading / unloading station; 17-Charging station; 18-Extended station. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0046] like Figure 1 As shown, the present invention provides an automatic laser decontamination system for contaminated metal waste from nuclear power plants, comprising: a laser cutting station 1, a laser cutting device 2, a fume filtration system 3, a controller 4, a laser cleaning device 5, a laser cleaning station 6, a laser stripping device 7, a laser stripping station 8, an isolation shed 9, an isolation wall 10, a transfer trolley 11, a decontamination / cutting workbench 12, an operating table 13, a workpiece flipping device 14, a flipping station 15, a loading / unloading station 16, a charging station 17, and an extended station 18.

[0047] The isolation shed 9 is divided into two parts: the interior and the exterior. The interior is further divided into a work area and a personnel activity area by a partition wall 10. A walkway is provided between the work area and the personnel activity area for the movement of transport carts 11.

[0048] Laser cutting station 1, laser cutting device 2, laser cleaning device 5, laser cleaning station 6, laser peeling device 7, laser peeling station 8, and extended station 18 are arranged within the work area of ​​isolation shed 9; transfer trolley 11, decontamination / cutting workbench 12, operating table 13, workpiece flipping device 14, flipping station 15, loading and unloading station 16, and charging station 17 are arranged within the personnel activity area of ​​isolation shed 9. Fume filtration system 3 and controller 4 are located outside isolation shed 9.

[0049] The isolation shed 9 has a fume extraction port on the side wall of the work area, which is connected to the fume filtration system 3 to maintain a negative pressure inside the isolation shed. The laser cutting device 2, laser cleaning device 5, and laser peeling device 7 are equipped with fume extraction ports at their ends, which are connected to the fume filtration system 3 to collect the fumes generated during laser operations.

[0050] The cleaning / cutting workbench 12 is used to place items to be cleaned.

[0051] The transfer trolley 11 is used to transfer the cleaning / cutting workbench 12 to different workstations, including laser cutting workstation 1, laser cleaning workstation 6, laser peeling workstation 8, flipping workstation 15, loading and unloading workstation 16, and operating table 13.

[0052] The charging station 17 is used for charging the transfer trolley 11. When the transfer trolley 11 is low on power, it will automatically move to the charging station 17 for charging.

[0053] The laser cutting device 2, in conjunction with the laser cutting station 1, is used to cut and disassemble the items to be cleaned; the laser cleaning device 5 and the laser stripping device 7, in conjunction with the laser cleaning station 6 and the laser stripping station 8 respectively, are used to remove surface contaminants from the items to be cleaned using lasers.

[0054] Expansion station 18 is a reserved station that can be used to add a decontamination process according to usage requirements.

[0055] The workpiece flipping device 14, together with the flipping station 15 and the loading / unloading station 16, is used for loading, unloading, and flipping operations of items to be cleaned or cut.

[0056] The control panel 13 is used to control the operation of the entire decontamination system and to measure the surface contamination level and radiation level of the object to be decontaminated before and after decontamination.

[0057] The operating table 13 is connected to the transfer trolley 11 and is used to control the transfer of the transfer trolley 11. The operating table 13 is also connected to the workpiece flipping device 14 and is used to control the loading, unloading and flipping operations of the workpiece flipping device 14.

[0058] The control panel 13 is connected to the controller 4 and is used to measure the size of the object to be cleaned, measure the surface contamination level and radiation level of the object before and after cleaning, and transmit the measurement results to the central control system of the controller 4.

[0059] Workers operate and control the equipment at control panel 13. Workers are located in the personnel activity area. Laser cutting station 1, laser cutting device 2, laser cleaning device 5, laser cleaning station 6, laser peeling device 7, laser peeling station 8, and other laser operation facilities are located in the work area. The work area is separated from the personnel activity area by isolation wall 10, which can effectively reduce the harm to workers and protect their safety.

[0060] The controller 4 includes the control system for the entire decontamination system. The controller 4 is connected to the operating table 13 and is used to record the size of the object to be decontaminated, the surface contamination level of the object before and after decontamination, and the radiation level. The controller 4 is connected to the laser cutting device 2, the laser cleaning device 5, and the laser stripping device 7 and is used to preset the cutting parameters and decontamination process parameters of the object to be decontaminated. The controller 4 controls the laser cutting device 2 to perform laser cutting according to the preset cutting parameters and controls the laser cleaning device 5 and the laser stripping device 7 to perform automatic laser decontamination operations according to the preset decontamination process parameters.

[0061] The automatic laser decontamination system for contaminated metal waste from nuclear power plants, provided by this invention, is used for the decontamination treatment of contaminated metal waste from nuclear power plants. The specific decontamination method includes the following steps:

[0062] Step 1: Turn on the main power supply of the decontamination system.

[0063] Step 2: Based on the size of the item to be cleaned, preset the cutting parameters through the central control system of controller 4; at the loading / unloading station 16, use the workpiece flipping device 14 to place the item to be cleaned on the cleaning / cutting worktable 12, and the transfer trolley 11 transfers the cleaning / cutting worktable 12 to the operating table 13. Measure the size of the item to be cleaned. If the size of the item to be cleaned is larger than the preset cutting parameters, proceed to step 3; otherwise, proceed to step 5.

[0064] Step 3: The transfer trolley 11 transfers the cleaning / cutting workbench 12 to the laser cutting station 1. The central control system of the controller 4 controls the laser cutting device 2 to perform laser cutting according to the preset cutting parameters, cutting the object to be cleaned into objects of preset size.

[0065] In one specific embodiment, the central control system of the controller 4 presets the cutting parameters to 1m×1m. If the size of the item to be cleaned is greater than 1m×1m, the item to be cleaned will be cut and disassembled into items with a size less than 1m×1m.

[0066] Step 4: The transfer trolley 11 transfers the cleaning / cutting workbench 12 to the loading / unloading station 16 and selects the appropriate items for cleaning.

[0067] Step 5: The transfer trolley 11 transfers the decontamination / cutting workbench 12 to the operating table 13, measures the surface contamination level and radiation level of the item to be decontaminated before decontamination, and records them into the central control system of the controller 4.

[0068] Step 6: Based on the shape, material, surface contamination level, and radiation level of the object to be cleaned, the central control system of controller 4 presets the cleaning process parameters. The central control system of controller 4 controls the laser cleaning device 5 and the laser stripping device 7 to perform automatic laser cleaning operations according to the preset cleaning process parameters. The surface contamination level and radiation level of the object to be cleaned after laser cleaning are measured and recorded into the central control system of controller 4.

[0069] Step 6.1: Based on the shape, material, surface contamination level, and radiation level of the object to be decontaminated, preset the decontamination process parameters through the central control system of controller 4.

[0070] Step 6.2: The transfer trolley 11 transfers the decontamination / cutting workbench 12 to the laser cleaning station 6. The central control system of the controller 4 controls the laser cleaning device 5 to perform laser cleaning operations according to the preset decontamination process parameters.

[0071] Step 6.3 After laser cleaning is completed, the transfer trolley 11 transfers the decontamination / cutting workbench 12 to the laser stripping station 8. The central control system of the controller 4 controls the laser stripping device 7 to perform laser stripping operation according to the preset decontamination process parameters.

[0072] Step 6.4 After the laser stripping is completed, the transfer trolley 11 transfers the decontamination / stripping workbench to the operating table 13, measures the surface contamination level and radiation level of the item to be decontaminated after decontamination, and records them into the central control system of the controller 4.

[0073] Step 7: The transfer trolley 11 transfers the cleaning / cutting workbench 12 to the flipping station 15, and uses the workpiece flipping device 14 to flip the item to be cleaned.

[0074] Step 8: Repeat step 6 to complete the cleaning of the item to be cleaned.

[0075] Step 9: The transfer trolley 11 transfers the cleaning / cutting workbench 12 to the loading / unloading station 16, and uses the workpiece flipping device 14 to unload the cleaned items.

[0076] Step 10: Repeat steps 2-7 to complete the batch cleaning of the items to be cleaned.

[0077] During the decontamination operation, multiple transfer units may execute other tasks issued by the system as needed, and the entire system can perform decontamination operations on multiple workpieces simultaneously.

[0078] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. All contents not described in detail in the present invention can be derived from existing technologies.

Claims

1. An automatic laser decontamination system for contaminated metal waste from nuclear power plants, characterized in that, The system includes: a laser cutting station (1), a laser cutting device (2), a controller (4), a laser cleaning device (5), a laser cleaning station (6), a laser peeling device (7), a laser peeling station (8), a transfer trolley (11), a cleaning / cutting workbench (12), an operating table (13), a workpiece flipping device (14), a flipping station (15), and a loading / unloading station (16). The cleaning / cutting workbench (12) is used to place items to be cleaned; The transfer trolley (11) is used to transfer the cleaning / cutting workbench (12) to the laser cutting station (1), laser cleaning station (6), laser peeling station (8), flipping station (15), loading and unloading station (16) or operating table (13). The laser cutting device (2) is used in conjunction with the laser cutting station (1) for cutting and disassembling the items to be cleaned; the laser cleaning device (5) and the laser stripping device (7) are used in conjunction with the laser cleaning station (6) and the laser stripping station (8) respectively for laser removal of contaminants from the surface of the items to be cleaned. The workpiece flipping device (14) works in conjunction with the flipping station (15) and the loading and unloading station (16) to load, unload and flip items to be cleaned or cut. The operating table (13) is connected to the transfer trolley (11) and is used to control the transfer of the transfer trolley (11). The operating table (13) is connected to the workpiece flipping device (14) and is used to control the loading, unloading and flipping operations of the workpiece flipping device (14). The operating console (13) is connected to the controller (4) and is used to measure the size of the item to be cleaned, measure the surface contamination level and radiation level of the item to be cleaned before and after cleaning, and transmit the measurement results to the central control system of the controller (4). The controller (4) is connected to the operating table (13) and is used to record the size of the item to be cleaned, the surface contamination level and radiation level of the item before and after cleaning. The controller (4) is connected to the laser cutting device (2), the laser cleaning device (5), and the laser stripping device (7) and is used to preset the cutting parameters and cleaning process parameters of the item to be cleaned, control the laser cutting device (2) to perform laser cutting according to the preset cutting parameters, and control the laser cleaning device (5) and the laser stripping device (7) to perform automatic laser cleaning operation according to the preset cleaning process parameters.

2. The automatic laser decontamination system for contaminated metal waste from nuclear power plants according to claim 1, characterized in that, The system also includes an isolation shed (9), which is divided into an interior and an exterior. The interior of the isolation shed (9) is divided into a work area and a personnel activity area. The laser cutting station (1), laser cutting device (2), laser cleaning device (5), laser cleaning station (6), laser peeling device (7), laser peeling station (8), and extension station (18) are arranged in the work area of ​​the isolation shed (9). The transfer trolley (11), decontamination / cutting workbench (12), operating table (13), workpiece flipping device (14), flipping station (15), loading and unloading station (16), and charging station (17) are arranged in the personnel activity area of ​​the isolation shed (9). The controller (4) is arranged outside the isolation shed (9).

3. The automatic laser decontamination system for contaminated metal waste from nuclear power plants according to claim 2, characterized in that, The system also includes a partition wall (10). The interior of the partition shed (9) is divided into a work area and a personnel activity area by the partition wall (10). A walking passage is provided between the work area and the personnel activity area for the transfer cart (11) to move.

4. The automatic laser decontamination system for contaminated metal waste from nuclear power plants according to claim 2, characterized in that, The system also includes a dust filtration system (3), which is located outside the isolation shed (9). The side wall of the working area of ​​the isolation shed (9) is provided with a regional dust suction port, which is connected to the dust filtration system (3) to maintain a negative pressure state inside the isolation shed.

5. An automatic laser decontamination system for contaminated metal waste from nuclear power plants according to claim 4, characterized in that, The laser cutting device (2), laser cleaning device (5), and laser stripping device (7) are equipped with dust extraction ports at their ends. The dust extraction ports are connected to the dust filtration system (3) to collect the dust generated during laser operations.

6. The automatic laser decontamination system for contaminated metal waste from nuclear power plants according to claim 1, characterized in that, The system also includes a charging station (17), which is used to charge the transfer trolley (11). When the transfer trolley (11) is low on power, it will automatically move to the charging station (17) for charging.

7. The automatic laser decontamination system for contaminated metal waste from nuclear power plants according to claim 1, characterized in that, The system also includes an expansion station (18), which is a reserved station for adding a decontamination process according to usage requirements.

8. An automated laser decontamination method for contaminated metal waste from nuclear power plants, using the automated laser decontamination system for contaminated metal waste from nuclear power plants as described in any one of claims 1-7, the method comprising: Step 1: Turn on the main power supply of the decontamination system; Step 2: Based on the size of the item to be cleaned, preset the cutting parameters through the central control system of the controller (4); at the loading and unloading station (16), use the workpiece flipping device (14) to place the item to be cleaned on the cleaning / cutting worktable (12), and the transfer trolley (11) transfers the cleaning / cutting worktable (12) to the operating table (13). Measure the size of the item to be cleaned. If the size of the item to be cleaned is greater than the preset cutting parameters, then proceed to step 3; otherwise, proceed to step 5. Step 3: The transfer trolley (11) transfers the cleaning / cutting workbench (12) to the laser cutting station (1). The central control system of the controller (4) controls the laser cutting device (2) to perform laser cutting according to the preset cutting parameters, cutting the item to be cleaned into items of preset size. Step 4: The transfer trolley (11) transfers the cleaning / cutting workbench (12) to the loading / unloading station (16) and selects the appropriate items for cleaning; Step 5: The transfer trolley (11) transfers the cleaning / cutting workbench (12) to the operating table (13), measures the surface contamination level and radiation level of the item to be cleaned before cleaning, and records them into the central control system of the controller (4). Step 6: Based on the shape, material, surface contamination level and radiation level of the object to be decontaminated, the decontamination process parameters are preset through the central control system of the controller (4). The central control system of the controller (4) controls the laser cleaning device (5) and the laser stripping device (7) to perform automatic laser decontamination according to the preset decontamination process parameters. The surface contamination level and radiation level of the object to be decontaminated after laser decontamination are measured and entered into the central control system of the controller (4). Step 7: The transfer trolley (11) transfers the cleaning / cutting workbench (12) to the flipping station (15) and uses the workpiece flipping device (14) to flip the items to be cleaned. Step 8: Repeat step 6 to complete the cleaning of the item to be cleaned; Step 9: The transfer trolley (11) transfers the cleaning / cutting workbench (12) to the loading / unloading station (16) and uses the workpiece flipping device (14) to unload the cleaned items. Step 10: Repeat steps 2-7 to complete the batch cleaning of the items to be cleaned.

9. The automatic laser decontamination method for contaminated metal waste from nuclear power plants according to claim 8, characterized in that, Step 6 includes: Step 6.1: Based on the shape, material, surface contamination level and radiation level of the object to be decontaminated, preset the decontamination process parameters through the central control system of the controller (4); Step 6.2: The transfer trolley (11) transfers the decontamination / cutting workbench (12) to the laser cleaning station (6). The central control system of the controller (4) controls the laser cleaning device (5) to perform laser cleaning operation according to the preset decontamination process parameters. Step 6.3 After the laser cleaning is completed, the transfer trolley (11) transfers the decontamination / cutting workbench (12) to the laser stripping station (8). The central control system of the controller (4) controls the laser stripping device (7) to perform laser stripping operation according to the preset decontamination process parameters. Step 6.4 After the laser stripping is completed, the transfer trolley (11) transfers the decontamination / stripping workbench to the operating table (13), measures the surface contamination level and radiation level of the item to be decontaminated after decontamination, and records them into the central control system of the controller (4).

10. The automatic laser decontamination method for contaminated metal waste from nuclear power plants according to claim 8, characterized in that, In steps 2-3, the central control system of the controller (4) presets the cutting parameters to 1m×1m. If the size of the item to be cleaned is greater than 1m×1m, the item to be cleaned will be cut and disassembled into items with a size less than 1m×1m.

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