A method for preventing misloading of fuel assemblies in a pressurized water reactor nuclear power plant

Abstract

The present invention belongs to the field of nuclear technology, and particularly relates to a method for preventing misloading and unloading of fuel assemblies in a pressurized water reactor nuclear power plant. The method comprises the following steps: Step 1: Preventing errors during the unloading process; Step 2: Preventing errors during the loading process; Step 3: Parameter determination. The beneficial effects of the present invention are as follows: (1) A method for preventing misloading and unloading of fuel assemblies in a pressurized water reactor nuclear power plant is established, namely, the static point determination method; (2) Automatic supervision and determination of the correctness of loading and unloading of fuel assemblies in a pressurized water reactor nuclear power plant are realized.

Description

Technical Field

[0001] The present invention belongs to the field of nuclear technology, and particularly relates to a method for preventing misloading of fuel assemblies in a pressurized water reactor nuclear power plant. Background Art

[0002] At present, during the design life of an operating pressurized water reactor nuclear power unit, about 40 operations of loading and unloading fuel assemblies are generally experienced to supplement the fuel consumption during the operation of the reactor. Since the loading methods of new and old fuel assemblies in the reactor are not only related to nuclear safety but also directly affect the economic efficiency of the operation of the nuclear power plant, a loading plan needs to be given by a professional design unit and approved by the national nuclear safety supervision department in advance. When the nuclear power plant specifically implements the loading and unloading of fuel according to the approved loading plan, any misloading is not allowed. Therefore, ensuring the correctness of each step of loading and unloading is the main goal of fuel management in the nuclear power plant.

[0003] Specifically, the loading and unloading operation is divided into two processes: the unloading process and the loading process. The unloading process is to use the loading and unloading machine in the reactor building (RX) to unload the fuel assembly from the core and unload it into the transfer fuel compartment in the RX building, and then together with the transfer fuel compartment, reach the fuel building (KX) through the transfer channel, and finally place it in the spent fuel pool in the fuel building for storage. The loading process is exactly the opposite of the unloading process. Use the gantry crane in KX to grab the fuel assembly from the spent fuel pool, unload it into the transfer fuel compartment in the KX building, then reach RX through the transfer channel, and place it at the specified position in the core after being grabbed by the loading and unloading machine.

[0004] Both the loading operation and the unloading operation need to be carried out according to the pre-formulated fuel assembly movement plan. To ensure that the correct fuel assembly is grabbed and placed in the correct position in each step of the operation, the current practice is to arrange special personnel to supervise the whole process of the loading and unloading operation, and confirm whether the corresponding core coordinates, spent fuel pool coordinates of each step of the fuel assembly operation are correct, and whether the fuel assembly is grabbed or stored normally through the way of personnel visual inspection + telephone communication.

[0005] This method is very primitive and is restricted by personnel, vision, telephone communication, etc. Communication errors often occur, resulting in misloading during the loading and unloading process. Summary of the Invention

[0006] The purpose of the present invention is to provide a method for preventing misloading of fuel assemblies in a pressurized water reactor nuclear power plant, which can prevent errors from occurring during the loading and unloading of fuel assemblies.

[0007] The technical solution of the present invention is as follows: A method for preventing misloading of fuel assemblies in a pressurized water reactor nuclear power plant includes the following steps:

[0008] Step 1: Preventing errors during the unloading process;

[0009] Step 2: Error prevention during the loading process;

[0010] Step 3: Parameter determination.

[0011] The described Step 1 includes the following:

[0012] Step 11: The loading and unloading machine grabs the fuel assembly in the core of the RX plant. The automatic identification device captures the position coordinates, lifting load weight, and lifting height of the loading and unloading machine, and compares them with the theoretical parameters set in advance by the automatic identification device to automatically determine whether the fuel assembly is correctly grabbed in the core;

[0013] Step 12: The loading and unloading machine moves with the fuel assembly to the transfer bin in the RX plant and loads the fuel assembly into the transfer bin. This process is automatically judged by the automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the loading and unloading machine, and comparing them with the theoretical parameters set in advance to automatically determine whether the fuel assembly has been loaded into the transfer bin, and the fuel assembly identification number is automatically identified by the fuel assembly identification number automatic identification device at this position and compared with the theoretical parameters set in advance to determine whether this group of fuel assemblies is the fuel assemblies to be operated;

[0014] Step 13: The transfer bin transfers the fuel assembly from the RX plant to the KX plant. The gantry crane in the KX plant grabs the fuel assembly from the transfer bin. This process is automatically judged by the automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the gantry crane, and comparing them with the theoretical parameters set in advance to automatically determine that the fuel assembly has been grabbed from the transfer bin, and the fuel assembly identification number is automatically identified by the fuel assembly identification number automatic identification device at this position and compared with the theoretical parameters set in advance to determine whether this group of fuel assemblies is the fuel assemblies to be operated;

[0015] Step 14: After the gantry crane grabs the fuel assembly in the transfer bin of the KX plant, it moves to the target position of the spent fuel pool and completes loading the fuel assembly into the storage compartment at the target position. This process is judged by the automatic identification device capturing the position coordinates, lifting load weight, lifting height, etc. of the gantry crane and comparing them with the theoretical parameters set in advance by the automatic identification device to automatically determine whether the fuel assembly is correctly loaded into the spent fuel pool.

[0016] The described Step 3 includes the following:

[0017] Step 31: Parameter determination for the core in the RX plant;

[0018] Step 32: Parameter determination for the transfer bin in the RX plant;

[0019] Step 33: Parameter determination for the transfer bin in the KX plant;

[0020] Step 34: Judgment of the parameters of the spent fuel pool in the KX plant

[0021] The above-mentioned step 31 includes the following:

[0022] Judgment of fuel assembly information parameters: By installing an automatic identification device on the fuel handling machine, capture the specific device parameters reflecting the fuel assembly information, including: required position, current position, trolley coordinates, and cart coordinates, and compare them with the pre-set theoretical parameters to determine whether they are correct;

[0023] Judgment of fuel assembly operation parameters: By installing an automatic identification device on the fuel handling machine, capture the specific device parameters reflecting the fuel assembly operation, including: position of the fuel handling machine, lifting load weight, and lifting height, and compare them with the pre-set theoretical parameters to determine whether they are correct.

[0024] The above-mentioned step 32 includes the following:

[0025] Judgment of fuel assembly information parameters: By installing an automatic identification device on the fuel handling machine, capture the specific device parameters reflecting the fuel assembly information, including: required position, current position, trolley coordinates, and cart coordinates, and compare them with the pre-set theoretical parameters to determine whether they are correct; By installing an automatic identification device on the pool wall near the transfer fuel compartment in the RX plant, directly capture and read the fuel assembly information parameter: fuel assembly identification number, and compare it with the pre-set theoretical parameters to determine whether they are correct;

[0026] Judgment of fuel assembly operation parameters: By installing an automatic identification device on the fuel handling machine, capture the specific device parameters reflecting the fuel assembly operation, including: position of the fuel handling machine, lifting load weight, and lifting height, and compare them with the pre-set theoretical parameters to determine whether they are correct.

[0027] The above-mentioned step 33 includes the following:

[0028] Judgment of fuel assembly information parameters: By installing an automatic identification device on the gantry crane, capture the specific device parameters reflecting the fuel assembly information, including: trolley coordinates, and cart coordinates, and compare them with the pre-set theoretical parameters to determine whether they are correct; By installing an automatic identification device on the pool wall near the transfer fuel compartment in the KX plant, directly capture and read the fuel assembly information parameter: fuel assembly identification number, and compare it with the pre-set theoretical parameters to determine whether they are correct;

[0029] Judgment of fuel assembly operation parameters: By installing an automatic identification device on the gantry crane, capture the specific device parameters reflecting the fuel assembly operation, including: position of the gantry crane, lifting load weight, and lifting height, and compare them with the pre-set theoretical parameters to determine whether they are correct.

[0030] Step 34 described above includes the following:

[0031] Fuel assembly information parameter determination method: By installing an automatic identification device on the personnel overhead crane, capturing the specific device parameters reflecting the fuel assembly information, including: trolley coordinates and crab coordinates, and comparing them with the pre-set theoretical parameters to determine whether they are correct;

[0032] Fuel assembly operation parameter determination method: By installing an automatic identification device on the personnel overhead crane, capturing the specific device parameters reflecting the fuel assembly operation, including: the position of the personnel overhead crane, the height of the elevator, and the load of the elevator, and comparing them with the pre-set theoretical parameters to determine whether they are correct.

[0033] The beneficial effects of the present invention are as follows: (1) Establish a method to prevent errors in the loading and unloading of fuel assemblies in a pressurized water reactor nuclear power plant, namely the static point determination method; (2) Realize the automatic supervision and determination of the correctness of the loading and unloading of fuel assemblies in a pressurized water reactor nuclear power plant. Brief Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the fuel assembly unloading movement route flow (the loading movement route flow is the opposite);

[0035] Figure 2 It is a schematic diagram of the core determination method in the RX building;

[0036] Figure 3 It is a schematic diagram of the transfer cask determination method in the RX building;

[0037] Figure 4 It is a schematic diagram of the transfer cask determination method in the KX building;

[0038] Figure 5 It is a schematic diagram of the spent fuel pool determination method in the KX building. Detailed Embodiment

[0039] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0040] Based on machine vision automatic recognition and judgment in a nuclear environment, the present invention provides a method for automatically judging the correctness of the fuel assembly loading and unloading process, preventing errors during the fuel assembly loading and unloading process in a pressurized water reactor nuclear power plant. This method automatically identifies and determines the static measurement points of the fuel assembly on the movement route during the loading and unloading process, thereby ensuring the correctness of the entire loading and unloading process.

[0041] As Figure 1 shown, the entire fuel assembly loading and unloading process experiences the following route flow:

[0042] Unloading: Reactor building core → Reactor building transfer fuel compartment → KX building transfer fuel compartment → KX building spent fuel pool.

[0043] Loading (opposite to unloading): KX building spent fuel pool → KX building transfer fuel compartment → Reactor building transfer fuel compartment → Reactor building core.

[0044] The whole process includes four static measurement points and one route flow. As long as the static points are correct, the correctness of the whole route is ensured.

[0045] For each static measurement point, two determinations need to be carried out:

[0046] One is to extract the fuel assembly information parameters of this static measurement point and make a determination;

[0047] The other is to extract the fuel assembly operation parameters of this static measurement point and make a determination.

[0048] By adopting specific technical means, the determination of the static measurement point is realized. If the determination information is correct, then this static measurement point is correct. If all 4 static measurement points are correct, then the whole process is correct.

[0049] A method for preventing errors in loading and unloading fuel assemblies in a pressurized water reactor nuclear power plant, including the following steps:

[0050] Step 1: Anti-error method for the unloading process

[0051] Step 11: The charging and discharging machine grabs the fuel assembly in the reactor building core, automatically identifies the position coordinates, lifting load weight, lifting height, etc. of the charging and discharging machine captured by the device, and compares them with the theoretical parameters set in advance by the automatic identification device to automatically judge whether the fuel assembly is correctly grabbed in the core.

[0052] Step 12: The charging and discharging machine moves with the fuel assembly to the reactor building transfer fuel compartment and loads the fuel assembly into the transfer fuel compartment. This process is automatically judged by the automatic identification device, that is, by capturing the position coordinates, lifting load weight, lifting height of the charging and discharging machine, comparing them with the theoretical parameters set in advance, to automatically judge whether the fuel assembly has been loaded into the transfer fuel compartment, and identifying the fuel assembly identification number through the fuel assembly identification number automatic identification device at this position, and comparing it with the theoretical parameters set in advance to judge whether this group of fuel assemblies is the fuel assemblies to be operated.

[0053] Step 13: The transfer silo transports the fuel assembly from the RX building to the KX building. The gantry crane in the KX building grabs the fuel assembly from the transfer silo. This process is automatically judged by an automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the gantry crane, and comparing them with the pre-set theoretical parameters, to automatically judge that the fuel assembly has been grabbed from the transfer silo, and the fuel assembly identification number is identified by the fuel assembly identification number automatic identification device at this position, and compared with the pre-set theoretical parameters to judge that this group of fuel assemblies is the fuel assembly to be operated.

[0054] Step 14: After the gantry crane grabs the fuel assembly in the transfer silo of the KX building, it moves towards the target position in the spent fuel pool and completes loading the fuel assembly into the storage compartment at the target position. This process is captured by the automatic identification device for the position coordinates, lifting load weight, lifting height, etc. of the gantry crane, and compared with the pre-set theoretical parameters of the automatic identification device to automatically judge whether the fuel assembly is correctly loaded into the spent fuel pool.

[0055] Step 2: Anti-error method for the refueling process

[0056] Step 21: The gantry crane grabs the fuel assembly in the storage compartment at the target position of the spent fuel pool in the KX building. This process is captured by the automatic identification device for the position coordinates, lifting load weight, lifting height, etc. of the gantry crane, and compared with the pre-set theoretical parameters of the automatic identification device to automatically judge whether the fuel assembly is correctly grabbed in the spent fuel pool.

[0057] Step 22: The gantry crane moves with the grabbed fuel assembly to the target position of the transfer silo in the KX building and loads the fuel assembly into the transfer silo. This process is automatically judged by an automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the gantry crane, and comparing them with the pre-set theoretical parameters, to automatically judge that the fuel assembly has been loaded into the transfer silo, and the fuel assembly identification number is identified by the fuel assembly identification number automatic identification device at this position, and compared with the pre-set theoretical parameters to judge that this group of fuel assemblies is the fuel assembly to be operated.

[0058] Step 23: The transfer silo transports the fuel assembly from the KX building to the RX building. The charging and discharging machine moves to the position of the transfer silo in the RX building and grabs the fuel assembly from the transfer silo. This process is automatically judged by an automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the charging and discharging machine, and comparing them with the pre-set theoretical parameters, to automatically judge whether the fuel assembly has been grabbed from the transfer silo, and the fuel assembly identification number is identified by the fuel assembly identification number automatic identification device at this position, and compared with the pre-set theoretical parameters to judge that this group of fuel assemblies is the fuel assembly to be operated.

[0059] Step 24: The charging and discharging machine moves to the target position of the reactor core in the RX building together with the grabbed fuel assembly, and completes the loading of the fuel assembly at the target position. During this process, an automatic identification device captures the position coordinates, lifting load weight, lifting height, etc. of the charging and discharging machine, and compares them with the theoretical parameters set in advance by the automatic identification device to automatically determine whether the fuel assembly is correctly loaded in the reactor core.

[0060] Step 3: Set static measurement points

[0061] The above four-step process can be divided into four areas: the reactor core in the RX building, the transfer fuel compartment in the RX building, the transfer fuel compartment in the KX building, and the spent fuel pool in the KX building. Four static measurement points are arranged in these four areas to complete the discrimination of anti-misloading during fuel handling:

[0062] Step 31: Reactor core in the RX building

[0063] Fuel assembly information parameters: Reactor core coordinates;

[0064] Fuel assembly operation parameters: Loading into the reactor core (fuel loading) or withdrawing from the reactor core (fuel unloading);

[0065] Method for determining fuel assembly information parameters: By installing an automatic identification device on the charging and discharging machine, capture the specific device parameters reflecting the fuel assembly information, including: required position, current position, trolley coordinates, and compare them with the theoretical parameters set in advance to determine whether it is correct;

[0066] Method for determining fuel assembly operation parameters: By installing an automatic identification device on the charging and discharging machine, capture the specific device parameters reflecting the fuel assembly operation, including: position of the charging and discharging machine, lifting load weight, lifting height, and compare them with the theoretical parameters set in advance to determine whether it is correct.

[0067] Step 32: Transfer fuel compartment in the RX building

[0068] Fuel assembly information parameters: Fuel assembly identification number, transfer fuel compartment coordinates;

[0069] Fuel assembly operation parameters: Withdrawing from the transfer fuel compartment (fuel loading) or loading into the transfer fuel compartment (fuel unloading);

[0070] Method for determining fuel assembly information parameters: By installing an automatic identification device on the fuel handling machine to capture specific device parameters reflecting the fuel assembly information, including: required position, current position, crane coordinate, and trolley coordinate, and comparing them with the pre-set theoretical parameters to determine whether they are correct. By installing an automatic identification device on the pool wall near the transfer fuel hold in the RX building, directly capture and read the fuel assembly information parameters: fuel assembly identification number, and compare them with the pre-set theoretical parameters to determine whether they are correct;

[0071] Method for determining fuel assembly operation parameters: By installing an automatic identification device on the fuel handling machine to capture specific device parameters reflecting the fuel assembly operation, including: position of the fuel handling machine, lifting load weight, and lifting height, and comparing them with the pre-set theoretical parameters to determine whether they are correct.

[0072] Step 33: Transfer fuel hold in the KX building

[0073] Fuel assembly information parameters: Fuel assembly identification number, transfer fuel hold coordinate;

[0074] Fuel assembly operation parameters: Take out from the transfer fuel hold (unloading) or put into the transfer fuel hold (loading);

[0075] Method for determining fuel assembly information parameters: By installing an automatic identification device on the gantry crane to capture specific device parameters reflecting the fuel assembly information, including: crane coordinate, and trolley coordinate, and comparing them with the pre-set theoretical parameters to determine whether they are correct. By installing an automatic identification device on the pool wall near the transfer fuel hold in the KX building, directly capture and read the fuel assembly information parameters: fuel assembly identification number, and compare them with the pre-set theoretical parameters to determine whether they are correct;

[0076] Method for determining fuel assembly operation parameters: By installing an automatic identification device on the gantry crane to capture specific device parameters reflecting the fuel assembly operation, including: position of the gantry crane, lifting load weight, and lifting height, and comparing them with the pre-set theoretical parameters to determine whether they are correct.

[0077] Step 34: Spent fuel pool in the KX building

[0078] Fuel assembly information parameters: Spent fuel pool coordinate;

[0079] Fuel assembly operation parameters: Put into the spent fuel pool (unloading) or take out from the spent fuel pool (loading);

[0080] Method for determining fuel assembly information parameters: By installing an automatic identification device on the gantry crane to capture specific device parameters reflecting the fuel assembly information, including: crane coordinate, and trolley coordinate, and comparing them with the pre-set theoretical parameters to determine whether they are correct;

[0081] Method for determining fuel assembly operation parameters: By installing an automatic identification device on the personnel overhead crane to capture specific equipment parameters reflecting the operation of the fuel assembly, including: the position of the personnel overhead crane, the height of the elevator, and the load of the elevator, and comparing them with the pre-set theoretical parameters to determine whether it is correct. Specific embodiments:

[0083] 1) Unloading process:

[0084] According to the movement flow of the unloaded fuel assembly: RX plant core - RX plant transfer fuel compartment - KX plant transfer fuel compartment - KX plant spent fuel pool, four static measurement points are arranged at these four positions respectively. According to Figures 2 to 5 the determination method, automatically identify and determine the static measurement points of the fuel assembly on the movement route, so as to ensure the correctness of the entire loading and unloading process.

[0085] The static measurement point in the RX plant core is arranged on the operation platform of the loading and unloading machine, and the visual system can capture Figure 2 the information of the four small display screens and the main display screen in , and automatically process this information (image processing technology) to obtain coordinate information, weight information, and height information, and compare them with the pre-set theoretical parameters in real time to judge the correctness of the unloading at this stage; The key measurement point in the RX plant transfer fuel compartment is arranged above the side of the RX transfer fuel compartment, and it is best to be able to capture the position of the fuel assembly identification number. The judgment method is as Figure 3 shown. Automatically process the captured information to obtain the fuel assembly identification number information (image processing technology), and compare it with the pre-set theoretical parameters in real time to judge the correctness of the unloading at this stage; The key measurement point in the KX plant transfer fuel compartment is arranged above the side of the KX transfer fuel compartment, and it is best to be able to capture the position of the fuel assembly identification number. The judgment method is as Figure 4 shown. Automatically process the captured information to obtain the fuel assembly identification number information (image processing technology), and compare it with the pre-set theoretical parameters in real time to judge the correctness of the unloading at this stage; The static measurement point in the KX plant spent fuel pool is arranged on the operation platform of the personnel overhead crane, and the visual system can capture Figure 5 the information of the main display screen in , and automatically process this information (image processing technology) to obtain coordinate information, weight information, and height information, and compare them with the pre-set theoretical parameters in real time to judge the correctness of the unloading at this stage;

[0086] 2) Loading process:

[0087] The process is opposite to the unloading process, that is: KX plant spent fuel pool - KX plant transfer fuel compartment - RX plant transfer fuel compartment - RX plant core. Four static measurement points are arranged at these four positions respectively. According toFigures 2 to 5 Determination method, which automatically identifies and determines the static measurement points of the fuel assembly on the moving route, thereby ensuring the correctness of the entire refueling operation.

[0088] The static measurement points of the spent fuel pool in the KX plant are arranged on the operating platform of the personnel bridge crane, and the visual system can capture Figure 5 the information on the main display screen in, and automatically processes this information (image processing technology) to obtain coordinate information, weight information, and height information, and makes a real-time comparison with the pre-set theoretical parameters to judge the correctness of the refueling at this stage; the key measurement points of the KX plant transfer cargo hold are arranged above the side of the KX transfer cargo hold, and it is best to capture the position of the fuel assembly identification number. The judgment method is as Figure 4 shown. The information captured is automatically processed to obtain the fuel assembly identification number information (image processing technology), and a real-time comparison is made with the pre-set theoretical parameters to judge the correctness of the refueling at this stage; the key measurement points of the RX plant transfer cargo hold are arranged above the side of the RX transfer cargo hold, and it is best to capture the position of the fuel assembly identification number. The judgment method is as Figure 3 shown. The information captured is automatically processed to obtain the fuel assembly identification number information (image processing technology), and a real-time comparison is made with the pre-set theoretical parameters to judge the correctness of the refueling at this stage; the static measurement points of the RX plant core are arranged on the operating platform of the refueling machine, and the visual system can capture Figure 2 the information on the four small display screens and the main display screen in, and automatically processes this information (image processing technology) to obtain coordinate information, weight information, and height information, and makes a real-time comparison with the pre-set theoretical parameters to judge the correctness of the refueling at this stage.

Claims

1. A method for preventing loading and unloading errors of fuel assemblies in a pressurized water reactor nuclear power plant, characterized in that, it includes the following steps: Step 1: Preventing errors during the unloading process; Step 2: Preventing errors during the loading process; Step 3: Parameter determination; The said Step 3 includes the following: Step 31: Determining the core parameters in the RX building; The said Step 31 includes the following: Determining the fuel assembly information parameters: By installing an automatic identification device on the charging and discharging machine, capturing the specific device parameters reflecting the fuel assembly information, including: required position, current position, trolley coordinates, and car coordinates, and comparing them with the pre-set theoretical parameters to determine whether they are correct; Determining the fuel assembly operation parameters: By installing an automatic identification device on the charging and discharging machine, capturing the specific device parameters reflecting the fuel assembly operation, including: position of the charging and discharging machine, lifting load weight, and lifting height, and comparing them with the pre-set theoretical parameters to determine whether they are correct; Step 32: Determining the parameters of the transfer fuel hold in the RX building; The said Step 32 includes the following: Determining the fuel assembly information parameters: By installing an automatic identification device on the charging and discharging machine, capturing the specific device parameters reflecting the fuel assembly information, including: required position, current position, trolley coordinates, and car coordinates, and comparing them with the pre-set theoretical parameters to determine whether they are correct; By installing an automatic identification device on the pool wall near the transfer fuel hold in the RX building, directly capturing and reading the fuel assembly information parameter: fuel assembly identification number, and comparing it with the pre-set theoretical parameters to determine whether they are correct; Determining the fuel assembly operation parameters: By installing an automatic identification device on the charging and discharging machine, capturing the specific device parameters reflecting the fuel assembly operation, including: position of the charging and discharging machine, lifting load weight, and lifting height, and comparing them with the pre-set theoretical parameters to determine whether they are correct; Step 33: Determining the parameters of the transfer fuel hold in the KX building; The said Step 33 includes the following: Determining the fuel assembly information parameters: By installing an automatic identification device on the personnel overhead crane, capturing the specific device parameters reflecting the fuel assembly information, including: trolley coordinates, and car coordinates, and comparing them with the pre-set theoretical parameters to determine whether they are correct; By installing an automatic identification device on the pool wall near the transfer fuel hold in the KX building, directly capturing and reading the fuel assembly information parameter: fuel assembly identification number, and comparing it with the pre-set theoretical parameters to determine whether they are correct; Determining the fuel assembly operation parameters: By installing an automatic identification device on the personnel overhead crane, capturing the specific device parameters reflecting the fuel assembly operation, including: position of the personnel overhead crane, lifting load weight, and lifting height, and comparing them with the pre-set theoretical parameters to determine whether they are correct; Step 34: Determining the parameters of the spent fuel pool in the KX building; The said Step 34 includes the following: Method for determining the fuel assembly information parameters: By installing an automatic identification device on the personnel overhead crane, capturing the specific device parameters reflecting the fuel assembly information, including: trolley coordinates, and car coordinates, and comparing them with the pre-set theoretical parameters to determine whether they are correct; Method for determining fuel assembly operation parameters: By installing an automatic identification device on the man-rider crane to capture the specific equipment parameters reflecting the operation of the fuel assembly, including: the position of the man-rider crane, the height of the elevator, and the load of the elevator, and comparing them with the pre-set theoretical parameters to determine whether it is correct.

2. A method for preventing errors in loading and unloading fuel assemblies in a pressurized water reactor nuclear power plant as claimed in claim 1, characterized in that the step 1 includes the following: Step 11: The refueling machine grabs the fuel assembly in the core of the RX building. The automatic identification device captures the position coordinates, lifting load weight, and lifting height of the refueling machine, and compares them with the pre-set theoretical parameters of the automatic identification device to automatically determine whether the fuel assembly is correctly grabbed in the core; Step 12: The refueling machine moves the fuel assembly to the transfer fuel tank in the RX building and loads the fuel assembly into the transfer fuel tank. This process is automatically judged by the automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the refueling machine, and comparing them with the pre-set theoretical parameters to automatically determine whether the fuel assembly has been loaded into the transfer fuel tank, and the fuel assembly identification number is identified by the fuel assembly identification number automatic identification device at this position and compared with the pre-set theoretical parameters to determine whether this group of fuel assemblies is the fuel assembly to be operated; Step 13: The transfer fuel tank transports the fuel assembly from the RX building to the KX building. The man-rider crane in the KX building grabs the fuel assembly from the transfer fuel tank. This process is automatically judged by the automatic identification device, that is, by capturing the position coordinates, lifting load weight, and lifting height of the man-rider crane, and comparing them with the pre-set theoretical parameters to automatically determine that the fuel assembly has been lifted from the transfer fuel tank, and the fuel assembly identification number is identified by the fuel assembly identification number automatic identification device at this position and compared with the pre-set theoretical parameters to determine whether this group of fuel assemblies is the fuel assembly to be operated; Step 14: After the man-rider crane grabs the fuel assembly in the transfer fuel tank in the KX building, it moves towards the target position of the spent fuel pool and completes the loading of the fuel assembly into the storage compartment at the target position. This process is captured by the automatic identification device for the position coordinates, lifting load weight, lifting height, etc. of the man-rider crane, and compared with the pre-set theoretical parameters of the automatic identification device to automatically determine whether the fuel assembly is correctly loaded into the spent fuel pool.

Images