Nuclear power station equipment maintenance task allocation method and system

Abstract

The invention discloses a nuclear power station equipment maintenance task allocation method and system, and belongs to the technical field of nuclear power station equipment maintenance, and the method comprises the steps: obtaining equipment information of fault equipment, and carrying out the matching of historical maintenance data according to the equipment information, and obtaining historical fault data; acquiring actual fault data of the fault equipment, and comparing the actual fault data with the historical fault data to obtain a fault reason; obtaining historical maintenance data, and analyzing the historical maintenance data based on the fault cause to obtain a maintenance scheme; obtaining an original maintenance path of the fault equipment according to the equipment information; analyzing the safety of the original maintenance path based on the maintenance scheme to obtain an analysis result, and re-planning the maintenance path of the fault equipment according to the analysis result to obtain a safe maintenance path scheme; and generating and outputting a corresponding maintenance report according to the maintenance scheme and the safety maintenance path scheme. According to the method, the analyzed data volume is reduced, and the safety of the maintenance path is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant equipment maintenance, and in particular to a method and system for allocating maintenance tasks for nuclear power plant equipment. Background Art

[0002] A nuclear power plant is a facility that converts nuclear energy into electrical energy, converts the nuclear energy released by nuclear fission into thermal energy, and then converts thermal energy into electrical energy. A large amount of nuclear radiation is generated during the nuclear fission process. Therefore, when repairing equipment and facilities in a nuclear power plant, it is necessary to reasonably allocate the maintenance tasks of maintenance personnel to ensure their safety.

[0003] In related technologies, before maintenance personnel enter the containment of a nuclear power plant to perform equipment maintenance, they need to receive safety awareness training, professional knowledge training, emergency handling and response capability training to improve their safety awareness and thereby improve their safety.

[0004] Regarding the above-mentioned related technologies, although pre-maintenance training for maintenance personnel can ensure the successful maintenance of equipment, it lacks analysis of the problems that occur in the equipment to be maintained and lacks specificity, thereby increasing maintenance time, increasing the radiation exposure of a single maintenance personnel or multiple maintenance personnel, reducing maintenance efficiency, and reducing the safety of maintenance personnel. There is room for improvement. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by the present invention is: how to achieve dynamic power coordination between thermal power units and distributed energy storage, improve frequency regulation accuracy and system redundancy and fault tolerance through a segmented high-voltage commutation architecture and an adaptive droop control strategy, while suppressing high-voltage DC bus voltage fluctuations.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for allocating maintenance tasks for nuclear power plant equipment, comprising the following steps:

[0008] Obtain the device information of the faulty device and match the historical maintenance data with the device information to obtain historical fault data;

[0009] Obtain the actual fault data of the faulty equipment and compare the actual fault data with the historical fault data to obtain the cause of the fault;

[0010] Analyze historical maintenance data based on equipment information and fault causes to obtain maintenance plans;

[0011] Obtain the original repair path of the faulty equipment based on the equipment information;

[0012] Analyze the safety of the original maintenance path based on the maintenance plan, obtain the analysis results, and re-plan the maintenance path of the faulty equipment based on the analysis results to obtain a safe maintenance path plan;

[0013] Generate and output the corresponding maintenance report based on the maintenance plan and safe maintenance path plan.

[0014] As a preferred solution of the method for allocating maintenance tasks for nuclear power plant equipment described in the present invention, the method for obtaining the maintenance plan includes:

[0015] Obtain historical maintenance data and filter it based on device information and fault causes to obtain historical maintenance data to be analyzed for the same fault type and fault cause.

[0016] Perform maintenance result analysis on the historical maintenance data to be analyzed to obtain the maintenance stage used to measure the completion of staged maintenance;

[0017] According to the maintenance stage, the maintenance method and maintenance result data in the maintenance stage, as well as the initial result data of the maintenance stage are obtained;

[0018] Analyze and judge the maintenance methods in the maintenance phase based on the initial result data and maintenance result data to obtain effective maintenance behaviors;

[0019] According to the maintenance phase, the effective maintenance behaviors in different maintenance phases are arranged and combined to obtain the effective maintenance group;

[0020] Analyze the maintenance methods of the effective maintenance group and obtain maintenance plans;

[0021] Through the above technical solution, the cause of the faulty equipment is determined through historical maintenance data, so that maintenance personnel can receive targeted training and technical exchanges based on the cause of the fault. By analyzing historical maintenance plans for the same fault cause, the maintenance methods used by maintenance personnel for the fault cause in the historical maintenance process are determined, thereby judging the effectiveness of the maintenance methods to screen out effective maintenance methods. By permuting and combining effective maintenance methods and analyzing the rationality of the combinations, the maintenance plan obtained can effectively deal with the cause of the fault, reduce the time required for maintenance, and thus improve the safety of maintenance personnel.

[0022] As a preferred solution of the method for allocating maintenance tasks for nuclear power plant equipment according to the present invention, the step of obtaining effective maintenance behavior includes:

[0023] Conduct maintenance result-oriented analysis on maintenance methods to determine the difference between the maintenance sub-result data and maintenance result data after each maintenance method is implemented;

[0024] If the difference between the maintenance sub-result data and the maintenance result data after the maintenance method is implemented shows a decreasing trend, the corresponding maintenance method is determined to be an effective maintenance behavior;

[0025] If the difference between the maintenance sub-result data and the maintenance result data after the maintenance method is implemented increases, the corresponding maintenance method is determined to be a pending means;

[0026] Obtaining a maintenance method that occurs after the time when the means to be determined is implemented, and analyzing the maintenance capability of the maintenance method to determine whether the maintenance result achieved by the maintenance method when the means to be determined is not implemented is the same as the maintenance result achieved by the maintenance method when the means to be determined is implemented;

[0027] If the same result can be achieved, the means to be determined is determined to be an invalid means; otherwise, the means to be determined is determined to be a valid maintenance behavior;

[0028] Through the above technical solution, a maintenance result-oriented analysis is performed on the maintenance method to determine the maintenance effect of a single maintenance method in the maintenance process, and then whether it is close to the final maintenance result data is determined based on the maintenance effect, so as to judge whether the single maintenance method is effective. If a single maintenance method is not effective, a maintenance effect analysis will be performed on the next maintenance method of the single maintenance method to determine whether the next maintenance method can achieve the same effect without the single maintenance method, and then the effectiveness of the ineffective single maintenance method in the entire maintenance plan is judged. Through multiple judgments on the maintenance method, the accuracy of the judgment is improved, thereby ensuring the effectiveness of the maintenance method, improving the feasibility of the maintenance plan, and thus improving the safety of the maintenance personnel.

[0029] As a preferred solution of the method for allocating maintenance tasks for nuclear power plant equipment described in the present invention, the step of analyzing the maintenance mode of the effective maintenance group includes:

[0030] Obtain historical maintenance data of effective maintenance behaviors of maintenance combinations in effective maintenance groups, analyze the historical maintenance data and effective maintenance behaviors, determine the impact of effective maintenance behaviors on faulty equipment, and obtain impact relationship data;

[0031] Based on the impact relationship data and the initial result data, data verification is performed on the effective maintenance behavior in the maintenance combination to obtain data verification result information;

[0032] If the data verification result information can reach the maintenance result data, then the maintenance combination is judged to be reasonable;

[0033] If the data verification result information indicates that the maintenance result data cannot be achieved, it is determined that the maintenance combination is not reasonable;

[0034] Count the reasonable maintenance combinations and sort them according to the total maintenance time to obtain the completed maintenance plan;

[0035] Through the above technical solution, the data information before and after the implementation of the corresponding maintenance method is determined through historical maintenance data, so as to judge the maintenance impact of different maintenance methods on the faulty equipment, and then verify the maintenance plan in the maintenance combination based on the impact relationship data and the initial result data, so as to judge whether the combination of the maintenance plans in the maintenance combination is reasonable, thereby ensuring the feasibility of the maintenance plan, ensuring the effectiveness of the training of maintenance personnel, and improving the work efficiency and life safety of maintenance personnel.

[0036] As a preferred solution of the method for allocating maintenance tasks for nuclear power plant equipment described in the present invention, the method for obtaining the safe maintenance path solution includes:

[0037] Evaluate the repair difficulty of faulty equipment based on historical maintenance data to obtain repair difficulty data;

[0038] Based on the maintenance difficulty data, the faulty equipment is divided to obtain the maintenance difficulty set;

[0039] Obtain historical maintenance paths for a maintenance difficulty set of the same maintenance difficulty to obtain a first path set;

[0040] Comparing the maintenance paths in the first path set with the location information of the current faulty device, and filtering out the faulty devices in the first path set whose maintenance paths pass through other faulty devices;

[0041] Replanning a safe maintenance path for the screened faulty equipment to obtain a second path data set, and generating a safe maintenance path plan based on the second path data set;

[0042] Through the above technical solution, the historical maintenance path of the faulty equipment is obtained based on the historical maintenance data, and then the historical maintenance path is compared with the current location of the faulty equipment to determine whether the historical maintenance path passes through the current faulty equipment, thereby performing a first screening of the historical maintenance path to screen out the faulty equipment with safety risks, and planning the path for the faulty equipment, thereby ensuring that the maintenance paths of all faulty equipment are safe, thereby ensuring the safety of maintenance personnel.

[0043] As a preferred solution of the method for allocating maintenance tasks for nuclear power plant equipment according to the present invention, the step of obtaining the first path set includes:

[0044] Get the safety area of ​​the nuclear power plant and output the current safety area;

[0045] Based on the fault information of the faulty equipment with the highest repair difficulty, the historical safety path data and the corresponding historical safety area of ​​the corresponding faulty equipment are obtained;

[0046] Compare the historical safety zone with the current safety zone to determine whether the historical safety path data is within the current safety zone;

[0047] If it is determined to be within the current safe area, the historical safe path data is retained;

[0048] If it is determined that the device is not within the current safe zone, a path is planned for the faulty device according to the current safe zone to obtain a safe path for the faulty device and integrate it into the first path set;

[0049] Through the above technical solution, the safe area in the current state is determined to judge whether the historical maintenance path is still within the safe area, and then to judge whether to retain the historical maintenance path, so that the retained historical maintenance path itself is safe. At the same time, since the safety of the historical maintenance path is judged, the retained maintenance path does not need to be re-planned, which reduces the planning process and improves planning efficiency.

[0050] As a preferred solution of the method for allocating maintenance tasks for nuclear power plant equipment according to the present invention, the step of generating a safe maintenance path plan further includes:

[0051] Perform risk analysis on other faulty equipment that the first centralized maintenance route passes through to obtain risk assessment data;

[0052] Compare the risk assessment data with the built-in safety data. If the risk assessment data is not less than the built-in safety data, replan the corresponding maintenance path. If the risk assessment data is less than the built-in safety data, analyze the maintenance status of the faulty equipment on the corresponding path to determine whether the faulty equipment is in maintenance status.

[0053] If the faulty device is determined to be under maintenance, the path is replanned; otherwise, the path is retained.

[0054] Through the above technical solution, the maintenance path in the first path set is judged by three levels of judgment criteria: whether it passes through other faulty equipment, the danger judgment when passing through other faulty equipment, and the maintenance status of other equipment when passing through other faulty equipment, so as to ensure that the maintenance path finally retained is the safest and most reliable, thereby improving the safety of maintenance personnel on the way to maintenance.

[0055] Another object of the present invention is to provide a system for allocating maintenance tasks for nuclear power plant equipment.

[0056] To solve the above technical problems, the present invention provides the following technical solutions: a system for allocating maintenance tasks for nuclear power plant equipment, comprising:

[0057] Device information acquisition module, used to obtain device information of faulty devices;

[0058] Historical maintenance data matching module, used to match historical maintenance data according to equipment information and obtain historical fault data;

[0059] The fault cause comparison module is used to compare actual fault data with historical fault data to analyze the cause of the fault.

[0060] The present invention provides a computer device comprising a memory and a processor, wherein the memory stores a computer program and is characterized in that when the processor executes the computer program, the steps of the method for allocating maintenance tasks for nuclear power plant equipment are implemented.

[0061] The present invention provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the method for allocating maintenance tasks for nuclear power plant equipment are implemented.

[0062] Beneficial effects of the present invention:

[0063] By analyzing the historical maintenance data of the faulty equipment, the maintenance plan for the faulty equipment and the safe maintenance path to the faulty equipment during the historical maintenance are determined. By analyzing the historical maintenance plan, the historical maintenance plan is optimized to obtain a new maintenance plan, thereby improving the maintenance efficiency of the maintenance personnel for the fault, thereby reducing the maintenance time of the maintenance personnel, thereby reducing the radiation exposure and improving the safety of the maintenance personnel; by re-analyzing the path safety of the historical safe maintenance path, it is determined whether the historical safe maintenance path can meet the current actual situation, reducing the generation of safe maintenance paths, and at the same time increasing the safety of the safe maintenance path, thereby improving the safety of maintenance personnel passing through the safe maintenance path.

[0064] By analyzing the effectiveness of maintenance methods in the historical maintenance data of the corresponding faulty equipment, effective maintenance plans are screened out. Then, by combining the effective maintenance plans and making a rationality judgment on the combined effective maintenance group, the historical maintenance plans are optimized, thereby improving the maintenance efficiency of maintenance personnel in equipment maintenance, reducing the maintenance time of maintenance personnel, thereby reducing the radiation exposure of maintenance personnel and improving the safety of maintenance personnel.

[0065] Comprehensively utilize the historical maintenance path of the faulty equipment, the current safe area, and the location information of all current faulty equipment to determine whether the historical maintenance path can be applied to the maintenance of the current faulty equipment. The historical maintenance path and the current safe area are judged for the first time to determine the safety of the historical maintenance path. The historical maintenance path and the location information of all current faulty equipment are judged for the second time to determine whether the historical maintenance path passes through all current faulty equipment to determine the safety of the historical maintenance path. The judgment of the safety of the historical maintenance path is improved through two judgments. The safe historical maintenance path is retained to reduce the re-planning process, and the unsafe historical maintenance path is re-planned to ensure the safety of the maintenance path. This not only reduces the amount of data analyzed and improves the analysis efficiency, but also ensures the safety of the maintenance path, thereby improving the safety of the maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0067] Figure 1 The present invention provides an overall flow chart of a method for allocating maintenance tasks for nuclear power plant equipment according to an embodiment of the present invention.

[0068] Figure 2 An embodiment of the present invention provides a short-time high-frequency energy storage LCLC converter topology structure for a method for allocating maintenance tasks for nuclear power plant equipment.

[0069] Figure 3 A diagram showing the results of an improved phase-shift control for a method for allocating maintenance tasks for nuclear power plant equipment provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0070] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0071] Example 1, reference Figures 1 to 3 , which is the first embodiment of the present invention, provides a method for allocating maintenance tasks for nuclear power plant equipment, comprising:

[0072] S1. Obtain device information of the faulty device, and match historical maintenance data according to the device information to obtain historical fault data.

[0073] The historical maintenance data is screened through the equipment information of the faulty equipment to ensure that the screened historical fault data is the historical fault data of the same type of equipment, thereby improving the data quality of the historical fault data analysis and improving the accuracy of the fault cause determination.

[0074] In an optional embodiment, the device information includes but is not limited to device category, device function, and device number.

[0075] Historical maintenance data includes equipment information, historical maintenance data, and historical fault data.

[0076] S2. Obtain actual fault data of the faulty device and compare the actual fault data with historical fault data to obtain the cause of the fault.

[0077] By confirming the cause of the fault, the filtered historical fault data is further screened again, further improving the quality of the historical maintenance data to be analyzed, thereby improving the summary and judgment of the maintenance plan and improving the feasibility of the maintenance plan.

[0078] In this embodiment, radiation-hardened wireless sensor nodes (with a radiation dose rate of ≥1000 Gy / h) are used to collect real-time three-dimensional vibration spectra (0-10 kHz, 1 Hz resolution), neutron flux distribution on the pump surface (via embedded self-powered neutron detectors), and main coolant temperature / pressure gradients (with a micro-pressure differential sensor placed every 5 cm). Similar pump failure cases from a 20-year operation database are then retrieved for spectral feature comparison. The current vibration harmonic features (particularly the 2.5 kHz high-frequency component) are compared with historical failure modes such as bearing wear and impeller cavitation using wavelet packet decomposition. Radiation feature correlation is performed by analyzing the neutron flux rate distribution in the abnormal vibration area and establishing a correlation with historical cases of material degradation caused by neutron embrittlement. Spatiotemporal feature verification is performed by combining the cumulative operating time of the pump over the last three refueling cycles (up to 48,000 hours) to verify the consistency with the material fatigue curve.

[0079] After an initial screening of 32 historical fault records, a secondary intelligent filtering process was performed: environmental severity weighting prioritized repair cases under the same boric acid concentration (2200 ppm); timeliness correction automatically added a material aging correction factor (such as the radiation swelling rate of INCONEL 690 alloy) to outdated repair plans from ten years ago; and human factors engineering assessment eliminated solutions that required maintenance personnel to remain in radiation hotspots for more than 90 seconds. Ultimately, the root cause was determined.

[0080] S3. Obtain historical maintenance data, analyze the historical maintenance data based on the cause of the failure, and obtain a maintenance plan.

[0081] By analyzing and summarizing historical maintenance data, we can continuously optimize the maintenance methods for the same fault cause, thereby reducing unnecessary maintenance processes, improving maintenance efficiency, and further increasing the maintenance time of maintenance personnel, thereby improving the safety of maintenance personnel.

[0082] Obtain historical maintenance data and filter it based on device information and fault causes to obtain historical maintenance data to be analyzed for the same fault type and fault cause.

[0083] Perform maintenance result analysis on the historical maintenance data to be analyzed to obtain the maintenance stage used to measure the completion of staged maintenance;

[0084] According to the maintenance stage, the maintenance method and maintenance result data in the maintenance stage, as well as the initial result data of the maintenance stage are obtained;

[0085] Analyze and judge the maintenance methods in the maintenance phase based on the initial result data and maintenance result data to obtain effective maintenance behaviors;

[0086] According to the maintenance phase, the effective maintenance behaviors in different maintenance phases are arranged and combined to obtain the effective maintenance group;

[0087] Analyze the maintenance methods of the effective maintenance group and obtain the maintenance plan.

[0088] In this embodiment, when determining the maintenance plan, it is necessary to determine the historical maintenance data of the faulty equipment based on historical maintenance information and analyze the historical maintenance data to reduce misjudgments of fault maintenance, thereby more accurately determining the necessary process steps for maintenance. By analyzing the historical maintenance data to be analyzed to obtain a maintenance plan for the fault, maintenance personnel can have a more intuitive understanding of the maintenance operation, thereby improving maintenance efficiency and reducing exposure time. However, since different maintenance personnel have different maintenance methods for the same problem, it is necessary to select a maintenance method to obtain an optimal maintenance method to reduce the time required for maintenance at this maintenance stage. Since the maintenance stages when maintaining a fault are progressive, the second stage is performed on the basis of the completion of the first stage. Therefore, when selecting an effective maintenance method for the same fault problem based on different historical maintenance data to be analyzed, it is necessary to consider whether the maintenance method of the current stage matches the maintenance method of the next stage, thereby ensuring the feasibility of the maintenance plan and improving security.

[0089] In an optional embodiment, the fault is a device stability issue, requiring device balance testing and replacement of temperature-sensitive components. During the device balance test, adjustments are required. Some approaches achieve balance by first adjusting both ends of the device to extreme values, then adjusting a single end based on the balance at the extreme values. Other approaches involve simply replacing the device and then calibrating its balance. However, both of these approaches present problems. Therefore, adjustments can be made to one end of the device in the opposite direction, observing whether the device's balance changes during the adjustment process. If so, adjustments can be made to the other end. This achieves both device balance and detection of balancing component failures.

[0090] Since each maintenance method has its limitations, the maintenance method of the first stage is connected with the maintenance method of the second stage. Therefore, when selecting effective maintenance methods for different maintenance stages, we can determine whether the maintenance method of the second stage can be maintained based on the results of the maintenance method of the first stage by analyzing the influence between each maintenance stage, thereby ensuring that the maintenance stage can be reasonably advanced.

[0091] In this embodiment, the step of obtaining an effective maintenance behavior also includes: performing a maintenance result-oriented analysis on the maintenance method, and determining the effect difference between the maintenance sub-result data and the maintenance result data after the implementation of each maintenance method; if the effect difference between the maintenance sub-result data and the maintenance result data after the implementation of the maintenance method shows a decreasing trend, then the corresponding maintenance method is determined to be an effective maintenance behavior; if the effect difference between the maintenance sub-result data and the maintenance result data after the implementation of the maintenance method shows an increasing trend, then the corresponding maintenance method is determined to be a means to be judged; obtaining a maintenance method after the implementation time of the means to be judged, and analyzing the maintenance capability of the maintenance method to determine whether the result achieved by the maintenance method when the means to be judged is not implemented is the same as the maintenance result achieved by the maintenance method when the means to be judged is implemented; if the same result can be achieved, then the means to be judged is determined to be an invalid means, otherwise the means to be judged is determined to be an effective maintenance behavior.

[0092] By analyzing the maintenance result orientation of the maintenance method, it is determined whether the corresponding maintenance result tends to the target result, so as to make a first judgment on the effectiveness of the maintenance method. For the maintenance method determined as invalid maintenance in the first judgment process, a joint analysis between the maintenance method and the maintenance method is performed, so as to further judge the invalid maintenance method to determine whether the invalid maintenance method is part of the combined maintenance method, and then further clarify the effectiveness of the invalid maintenance method, strengthen the judgment of the maintenance method, improve the accuracy of the judgment of the maintenance method, and then increase the experience of the maintenance personnel during the pre-maintenance training of the maintenance personnel, making the maintenance process faster and more effective, thereby ensuring the safety of the maintenance personnel.

[0093] For example, let's say the device is calibrating data. The current data is 19, and the calibration target is 11. The historical calibration methods include: 19 → 18 → ... → 11, which adjusts the units digit by one, then decrements the tens digit by one; 19 → 20 → 21 → 11, which adjusts the units digit by one, then decrements the tens digit by one, to achieve data calibration; and 19 → 29 → 31 → 11, which adjusts the tens digit by one, then the units digit by one, then the tens digit by one, to achieve data calibration. Of these three methods, the first and second are both valid maintenance methods. While the third method can calibrate, it contains an invalid operation 1929. Therefore, when evaluating the third method, the result is that the units digit is first adjusted by one, then the tens digit is adjusted by one, i.e., 19 → 20 → 21 → 11. Among them, increasing the data on the ones digit, decreasing the data on the ones digit, increasing the data on the tens digit, and decreasing the data on the tens digit all correspond to one maintenance method.

[0094] In an optional embodiment, when a slight leak occurs in the safety valve of the primary-loop pressurizer of a nuclear power plant (leakage rate 0.3 L / min), the maintenance team performs three-level maintenance according to the historical plan: laser re-cladding of the valve sealing surface (remote operation under radiation protection), adjustment of the valve stem prestress (using a radiation-resistant torque wrench), and helium mass spectrometry leak detection in the sealed compartment (continuous monitoring by a radiation-resistant probe); and real-time collection of leakage noise characteristics through 12 radiation-resistant acoustic emission sensors arranged around the safety valve.

[0095] After laser cladding, actual data was measured and found to be consistent with the historical average 30% reduction in effective cladding, confirming this maintenance activity. After the valve stem was adjusted, actual data was measured, triggering the "pending action" flag. It was discovered that the adjustment had caused the valve seat eccentricity to reach 0.05mm. After helium testing, testing was performed without modifying the second stage. The leak rate remained at 0.22L / min, consistent with the second stage results. Therefore, the second stage operation was deemed ineffective and the valve stem required recalibration.

[0096] In another optional embodiment, the spent fuel pool cooling pump has an abnormal flow rate (design value 200m 3 / h→actually measured 185m 3 / h), implement maintenance plans, including plasma spraying of impeller cavitation areas using an underwater robot, regenerating motor winding insulation using on-site vacuum impregnation, and optimizing pipeline flow resistance by adding radiation-resistant drag reducers. A radiation-resistant fiber Bragg grating sensor array measures the depth of impeller cavitation pits, the amount of partial discharge in the motor windings, and the pressure drop gradient along the pipeline.

[0097] After plasma spraying, the flow rate is restored to 195m 3 / h (reaching 97.5% of the expected value), the cavitation pit depth decreased from 1.2mm to 0.3mm, which was judged to be effective core maintenance. After insulation treatment, the flow rate dropped to 188m 3 / h (abnormal fluctuation), detection found that the impregnating resin solidified prematurely under the radiation field, and marked it as pending judgment. After the drag reducer was added, the second stage was directly executed without correction, and the flow rate increased to 206m 3 / h, simulating the drag reducer effect when the second stage is not implemented → Theoretical flow rate 211m 3 / h. The deviation from the actual value indicates that the insulation treatment has side effects. It is judged that the second stage is an ineffective measure and radiation-stable insulation materials need to be used instead.

[0098] The steps for analyzing the maintenance mode of effective maintenance group include:

[0099] Obtain historical maintenance data of effective maintenance behaviors of maintenance combinations in effective maintenance groups, analyze the historical maintenance data and effective maintenance behaviors, determine the impact of effective maintenance behaviors on faulty equipment, and obtain impact relationship data;

[0100] Based on the impact relationship data and the initial result data, data verification is performed on the effective maintenance behavior in the maintenance combination to obtain data verification result information;

[0101] If the data verification result information can reach the maintenance result data, then the maintenance combination is judged to be reasonable;

[0102] If the data verification result information indicates that the maintenance result data cannot be achieved, it is determined that the maintenance combination is not reasonable;

[0103] The reasonable maintenance combinations are counted and sorted according to the total maintenance time to obtain the arranged maintenance plan.

[0104] In this embodiment, since the maintenance combination selects effective maintenance methods based on maintenance time, the effective maintenance methods in the selected maintenance combination are not rational. Therefore, it is necessary to judge the rationality of the combined maintenance plan to ensure that it can be properly executed when adopted. By inputting initial result data into the maintenance combination, the maintenance methods in the maintenance combination are used to determine whether the maintenance effect can achieve the maintenance result effect under the maintenance state, and then judge whether the maintenance combination is rational. This improves the accuracy of training experience transfer, thereby improving the maintenance efficiency of maintenance personnel when repairing faulty equipment, reducing maintenance time, reducing radiation exposure, and improving safety.

[0105] For example, the data information on the device is calibrated. The current data information is 19, and the calibration target is 11. Among the historical calibration methods, the first one is: 19→18→…→11, by subtracting one from the data in the ones digit; the second one is: 19→20→21→11, by adding one to the data in the ones digit, and then subtracting one from the data in the tens digit, so as to achieve data calibration; the third one is: 19→09→01→11, by first subtracting one from the data in the tens digit, then subtracting one from the data in the ones digit, and then adding one to the data in the tens digit, so as to achieve data calibration.

[0106] The first effective maintenance method is to adjust the data on the units digit by subtracting one A-;

[0107] The second effective maintenance method is to add one to the data in the units digit and make an adjustment A+, and subtract one to the data in the tens digit and make an adjustment B-;

[0108] The third effective maintenance method is to adjust the tens digit by subtracting one, called B-. The possible combinations are A-, A+, AB-, A+B-, and B-. However, A+ yields the result 19→20→21→…, which is unreasonable. Conversely, A+B- yields the result 19→20→21→11, which is reasonable. Therefore, the A+ maintenance combination is deleted, while the A+B- maintenance combination is retained. The first method requires eight adjustments, while the second requires three. Therefore, the second method takes precedence over the first when determining the time required.

[0109] S4. Obtain the original repair path of the faulty device based on the device information.

[0110] When obtaining the original maintenance path, the historical maintenance data is read and matched one-to-one with the equipment information according to the records of the historical maintenance data, and then the original maintenance path of the faulty equipment is obtained.

[0111] S5. Analyze the safety of the original maintenance path based on the maintenance plan to obtain analysis results, and replan the maintenance path of the faulty equipment based on the analysis results to obtain a safe maintenance path plan.

[0112] Evaluate the repair difficulty of faulty equipment based on historical maintenance data to obtain repair difficulty data;

[0113] Based on the maintenance difficulty data, the faulty equipment is divided to obtain the maintenance difficulty set;

[0114] Obtain historical maintenance paths for a maintenance difficulty set of the same maintenance difficulty to obtain a first path set;

[0115] The first path set obtaining step includes: obtaining a safety zone of the nuclear power plant and outputting a current safety zone; obtaining historical safety path data and corresponding historical safety zones of the corresponding faulty equipment based on fault information of the faulty equipment with a high repair difficulty; comparing the historical safety zones with the current safety zones to determine whether the historical safety path data is within the current safety zone;

[0116] If it is determined to be within the current safety area, the historical safety path data will be retained; if it is determined not to be within the current safety area, the path of the faulty device will be planned according to the current safety area to obtain the safety path corresponding to the faulty device and integrate it into the first path set.

[0117] In this embodiment, when selecting the historical maintenance path of the faulty equipment, the safety area fluctuates due to the different faulty equipment. By determining the safety area in the current state, it is judged whether the historical maintenance path is still within the safety area, and then it is judged whether to retain the historical maintenance path, so that the retained historical maintenance path itself has safety. At the same time, since the safety of the historical maintenance path is judged, the retained maintenance path does not need to be re-planned, which reduces the planning process and improves planning efficiency.

[0118] In an optional embodiment, for example, in case B, B1: (0,0)→(2,0)→(2,3), or B2: (0,0)→(1,0)→(1,3)→(2,3), and due to a device failure in B, the area (1,3) is not within the safe zone, so the path B2 is not passable. Therefore, it is necessary to replan the maintenance path of B, for example, B3: (0,0)→(3,0)→(3,3)→(2,3).

[0119] Comparing the maintenance paths in the first path set with the location information of the current faulty device, and filtering out the faulty devices in the first path set whose maintenance paths pass through other faulty devices;

[0120] A safe maintenance path is replanned for the screened faulty equipment to obtain a second path data set, and a safe maintenance path solution is generated based on the second path data set.

[0121] In this embodiment, the maintenance difficulty set is determined by analyzing the historical maintenance data of the faulty equipment. The maintenance difficulty of the faulty equipment is divided to determine the order in which maintenance personnel should proceed when repairing the fault, so as to reduce the mutual influence between maintenance personnel of different faulty equipment. At the same time, based on the judgment of the historical maintenance path of the faulty equipment, it is determined whether the maintenance personnel will affect other maintenance personnel who are currently repairing the faulty equipment and / or whether the equipment to be repaired will affect the maintenance personnel when repairing the faulty equipment, thereby improving the safety of maintenance personnel's maintenance.

[0122] In an optional embodiment, for example, there are faulty devices A and B, where device A is located at coordinates (2,2) and device B is located at coordinates (2,3). Starting from the coordinate origin (0,0), when planning the maintenance path for A and B, if the maintenance difficulty of B is too great and is not the same as that of A, the maintenance approval of B will be slower and the maintenance approval of A will be faster. Therefore, when planning the maintenance path for A and B, the condition of A is given priority. Therefore, the maintenance path of A can be (0,0)→(2,0)→(2,2). Then considering the situation of B, B1: (0,0)→(2,0)→(2,3), or B2: (0,0)→(1,0)→(1,3)→(2,3).

[0123] If the maintenance difficulty of A and B is the same, then when selecting the maintenance path for B, the priority of B2 is greater than the priority of B1, ensuring that the maintenance path of B does not affect the maintenance of A to the greatest extent, thereby improving the safety of maintenance personnel repairing equipment A and B.

[0124] The steps of generating a safe repair path plan also include:

[0125] Perform risk analysis on other faulty equipment that the first centralized maintenance route passes through to obtain risk assessment data;

[0126] Compare the risk assessment data with the built-in safety data. If the risk assessment data is not less than the built-in safety data, replan the corresponding maintenance path. If the risk assessment data is less than the built-in safety data, analyze the maintenance status of the faulty equipment on the corresponding path to determine whether the faulty equipment is in maintenance status.

[0127] If it is determined that the faulty device is under maintenance, the path is replanned; otherwise, the path is retained.

[0128] By performing a risk assessment on the paths in the first path set that pass through other faulty devices, the system determines whether the risk of passing through other faulty devices is lower than the built-in safety data. If it is, a maintenance path is planned for the corresponding faulty device. If it is lower than the built-in safety data, the maintenance status of the other faulty devices needs to be analyzed to determine whether the passage of maintenance personnel will affect the maintenance personnel currently performing repairs. By applying a three-tiered judgment criteria to the maintenance paths in the first path set: whether they pass through other faulty devices, the risk assessment when passing through other faulty devices, and the maintenance status of other devices when passing through other faulty devices, the system ensures that the remaining maintenance paths are the safest and most reliable, thereby improving the safety of maintenance personnel on their way to repairs.

[0129] In one embodiment, there are faulty devices A and B. Device A is located at coordinates (2,2) and device B is located at coordinates (2,3). Starting from the coordinate origin (0,0), the maintenance path for device A can be (0,0) → (2,0) → (2,2). Furthermore, the maintenance path for device B can be B1: (0,0) → (2,0) → (2,3). Path B1 passes through device A, so the hazard of device A needs to be analyzed to determine the danger to maintenance personnel when passing through A. If the hazard is high, a new maintenance path B2 is planned: (0,0) → (1,0) → (1,3) → (2,3). If the hazard is low, the maintenance status of device A is analyzed. If device A is not under maintenance, path B1 can be used. If device A is under maintenance, path B2 can be used.

[0130] If the risk assessment data is not less than the built-in safety data, the corresponding maintenance path is replanned, which also includes the following steps:

[0131] Based on the location information of the maintenance starting point and the target faulty device, all paths from the maintenance starting point to the target faulty device are determined, and the paths are filtered according to the faulty devices on the paths to obtain a passable path that does not pass through other faulty devices;

[0132] Obtaining length information of a passable path and radiation information within a safe area, and determining a radiation amount when passing through the passable path based on the length information to obtain radiation amount data;

[0133] The radiation data is screened to obtain the path with the minimum radiation as the maintenance path for the corresponding faulty equipment.

[0134] In this embodiment, after excluding the best path in history, radiation analysis is required for the multiple paths generated subsequently to determine the path with the smallest radiation and the shortest distance among the multiple generated paths as the maintenance path for the corresponding faulty equipment. This ensures that the maintenance personnel can correctly reach the designated fault location and reduces the radiation exposure of the maintenance personnel, thereby improving the safety of the maintenance personnel.

[0135] In one embodiment, under the same radiation dose, the newly planned maintenance paths for faulty device B are B2: (0,0)→(1,0)→(1,3)→(2,3), and B3: (0,0)→(3,0)→(3,3)→(2,3). Path B3 is longer than B2, and the time it takes to reach B from B3 is longer than the time it takes to reach B from B2. Under the same radiation dose, the radiation dose to B3 will increase, shortening the time it takes for maintenance personnel to repair B. This reduces maintenance efficiency, increases the risk for maintenance personnel, and reduces their safety.

[0136] S6. Generate and output a corresponding maintenance report based on the maintenance plan and the safe maintenance path plan.

[0137] Example 2 is the second embodiment of the present invention, which is different from the previous embodiment in that:

[0138] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0139] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0140] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0141] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0142] Example 3 is the third embodiment of the present invention, which provides a system for allocating maintenance tasks for nuclear power plant equipment, including:

[0143] Device information acquisition module, used to obtain device information of faulty devices;

[0144] Historical maintenance data matching module, used to match historical maintenance data according to equipment information and obtain historical fault data;

[0145] The fault cause comparison module is used to compare actual fault data with historical fault data to analyze the cause of the fault.

[0146] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for allocating maintenance tasks for nuclear power plant equipment, characterized by: include, Obtain the device information of the faulty device and match the historical maintenance data with the device information to obtain historical fault data; Obtain the actual fault data of the faulty equipment and compare the actual fault data with the historical fault data to obtain the cause of the fault; Analyze historical maintenance data based on equipment information and fault causes to obtain maintenance plans; Obtain the original repair path of the faulty equipment based on the equipment information; Analyze the safety of the original maintenance path based on the maintenance plan, obtain the analysis results, and re-plan the maintenance path of the faulty equipment based on the analysis results to obtain a safe maintenance path plan; Generate corresponding maintenance reports based on maintenance plans and safe maintenance path plans.

2. A method for allocating maintenance tasks for nuclear power plant equipment according to claim 1, characterized in that: The maintenance plan is obtained in the following ways: Obtain historical maintenance data and filter it based on device information and fault causes to obtain historical maintenance data to be analyzed for the same fault type and fault cause. Perform maintenance result analysis on the historical maintenance data to be analyzed to obtain the maintenance stage used to measure the completion of staged maintenance; According to the maintenance stage, the maintenance method and maintenance result data in the maintenance stage, as well as the initial result data of the maintenance stage are obtained; Analyze and judge the maintenance methods in the maintenance phase based on the initial result data and maintenance result data to obtain effective maintenance behaviors; Arrange and combine effective maintenance behaviors in different maintenance stages to obtain effective maintenance groups; Analyze the effective maintenance group and obtain the maintenance plan.

3. A method for allocating maintenance tasks for nuclear power plant equipment according to claim 2, characterized in that: The steps of obtaining the effective maintenance behavior include: Conduct maintenance result-oriented analysis on maintenance methods to determine the difference between the maintenance sub-result data and maintenance result data after each maintenance method is implemented; If the difference between the maintenance sub-result data and the maintenance result data after the maintenance method is implemented is reduced, the corresponding maintenance method is determined to be an effective maintenance behavior; If the difference between the maintenance sub-result data and the maintenance result data after the maintenance method is implemented increases, the corresponding maintenance method is determined to be a pending means; Obtaining a maintenance method that occurs after the implementation time of the means to be determined, and analyzing the maintenance capability of the maintenance method to determine whether the maintenance result achieved by the maintenance method when the means to be determined is not implemented is the same as the maintenance result achieved by the maintenance method when the means to be determined is implemented; If the same result can be achieved, the means to be determined is determined to be an invalid means; otherwise, the means to be determined is determined to be a valid maintenance behavior.

4. A method for allocating maintenance tasks for nuclear power plant equipment according to claim 3, characterized in that: The steps for analyzing the maintenance mode of effective maintenance group include: Obtain historical maintenance data of effective maintenance behaviors of maintenance combinations in effective maintenance groups, analyze the historical maintenance data and effective maintenance behaviors, determine the impact of effective maintenance behaviors on faulty equipment, and obtain impact relationship data; Based on the impact relationship data and the initial result data, data verification is performed on the effective maintenance behavior in the maintenance combination to obtain data verification result information; If the data verification result information can reach the maintenance result data, then the maintenance combination is judged to be reasonable; If the data verification result information indicates that the maintenance result data cannot be achieved, it is determined that the maintenance combination is not reasonable; The reasonable maintenance combinations are counted and sorted according to the total maintenance time to obtain the arranged maintenance plan.

5. A method for allocating maintenance tasks for nuclear power plant equipment according to claim 4, characterized in that: The method for obtaining the safe maintenance path plan includes: Evaluate the repair difficulty of faulty equipment based on historical maintenance data to obtain repair difficulty data; Based on the maintenance difficulty data, the faulty equipment is divided to obtain the maintenance difficulty set; Obtain historical maintenance paths for a maintenance difficulty set of the same maintenance difficulty to obtain a first path set; Comparing the maintenance paths in the first path set with the location information of the current faulty device, and filtering out the faulty devices in the first path set whose maintenance paths pass through other faulty devices; A safe maintenance path is replanned for the screened faulty equipment to obtain a second path data set, and a safe maintenance path solution is generated based on the second path data set.

6. A method for allocating maintenance tasks for nuclear power plant equipment according to claim 5, characterized in that: The step of obtaining the first path set includes: Get the safety area of ​​the nuclear power plant and output the current safety area; Based on the fault information of the faulty equipment with the highest repair difficulty, the historical safety path data and the corresponding historical safety area of ​​the corresponding faulty equipment are obtained; Compare the historical safety zone with the current safety zone to determine whether the historical safety path data is within the current safety zone; If it is determined to be within the current safe area, the historical safe path data is retained; If it is determined that the device is not within the current safety zone, a path is planned for the faulty device according to the current safety zone to obtain a safe path corresponding to the faulty device and integrate it into the first path set.

7. A method for allocating maintenance tasks for nuclear power plant equipment according to claim 6, characterized in that: The steps of generating a safe maintenance path plan also include: Perform risk analysis on other faulty equipment that the first centralized maintenance route passes through to obtain risk assessment data; Compare the risk assessment data with the built-in safety data. If the risk assessment data is not less than the built-in safety data, replan the corresponding maintenance path. If the risk assessment data is less than the built-in safety data, analyze the maintenance status of the faulty equipment on the corresponding path to determine whether the faulty equipment is in maintenance status. If it is determined that the faulty device is under maintenance, the path is replanned; otherwise, the path is retained.

8. A system for allocating maintenance tasks for nuclear power plant equipment, applying a method for allocating maintenance tasks for nuclear power plant equipment according to any one of claims 1 to 7, characterized in that: include: Device information acquisition module, used to obtain device information of faulty devices; Historical maintenance data matching module, used to match historical maintenance data according to equipment information and obtain historical fault data; The fault cause comparison module is used to compare actual fault data with historical fault data to analyze the cause of the fault.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a method for allocating maintenance tasks for nuclear power plant equipment according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for allocating maintenance tasks for nuclear power plant equipment according to any one of claims 1 to 7 are implemented.

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