Preventive maintenance method and system in nuclear power plant overhaul field

Abstract

The invention discloses a preventive maintenance method and system in the field of nuclear power plant overhaul, and relates to the technical field of nuclear power plant maintenance. Establishing a preventive maintenance template, and establishing a preventive maintenance template outline; and performing outline change management and project updating. The method ensures comprehensiveness and reliability of information, improves systematization and standardization of data management, lays a foundation for scientificity of preventive maintenance, realizes standardization, flexibility and targeted design of a maintenance template, ensures scientificity and reliability of template content, and is suitable for popularization and application. Powerful support is provided for precise maintenance of equipment and optimization of maintenance strategies, standardization and traceability of outline change management are achieved, it is ensured that maintenance work adapts to dynamic changes, and the real-time performance and accuracy of maintenance management are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant maintenance, and specifically to a preventive maintenance method and system in the field of nuclear power plant overhaul. Background Art

[0002] The overhaul of a nuclear power plant is an important link to ensure the safe operation of the nuclear power plant. The purpose is to discover and eliminate potential equipment faults through regular inspections and maintenance. With the rapid development of nuclear power technology, the overhaul of nuclear power plants has gradually shifted from the traditional after-fact maintenance mode to a predictive and preventive maintenance mode. Especially driven by big data analysis, the Internet of Things and artificial intelligence technologies, preventive maintenance methods have played an increasingly important role in equipment management and maintenance. These technologies can effectively formulate maintenance plans by real-time monitoring the operating status of equipment, combining historical data analysis and fault prediction models, improving the availability of equipment and the operating efficiency of nuclear power plants. At the same time, the application of intelligent systems and digital management platforms also provides technical support for preventive maintenance, making the overhaul of nuclear power plants more efficient and refined in management, execution and tracking.

[0003] Although certain progress has been made in preventive maintenance technology, the existing technology still faces many challenges in practical applications. The current preventive maintenance systems lack unity and comprehensiveness in data collection and processing. The collection and review of reference materials often rely on manual operations, resulting in low efficiency and easy errors. When establishing preventive maintenance templates, most existing systems fail to provide a flexible and extensible template outline design, unable to fully meet the complex and diverse equipment maintenance needs of nuclear power plants. In terms of maintenance outline change management and project update, existing systems generally lack efficient tracking and version control functions, leading to information redundancy or omission problems in multi-project parallel operations. These technical defects directly affect the systematicness and predictability of maintenance work, and it is difficult to fully utilize the advantages of preventive maintenance in improving equipment reliability and nuclear power plant operation safety. Therefore, how to establish an efficient, intelligent and standardized preventive maintenance method and system has become an urgent technical problem to be solved. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed.

[0005] Therefore, the technical problems solved by the present invention are: the existing nuclear power plant preventive maintenance technology has low data collection and review efficiency, single preventive maintenance template design, insufficient outline change and project update management, and the problem of how to achieve intelligent and standardized management.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A preventive maintenance method in the field of nuclear power plant overhaul, including collecting reference materials, reviewing reference materials and inputting them into the system; establishing a preventive maintenance template, establishing an outline of the preventive maintenance template; and conducting outline change management and project update.

[0007] As a preferred solution of the preventive maintenance method in the field of nuclear power plant overhaul described in the present invention, wherein: the collection of reference materials includes collecting different types of reference materials, including upstream and downstream regulations, industry standards, domestic and foreign industry experiences, manufacturer suggestions, and requirements of the nuclear power group. Equipment management engineers collect materials from internal and external channels. Collecting internal channel materials includes technical documents within the company, historical maintenance records, and equipment manuals. Collecting external channel materials includes industry standard organizations, international regulations, manufacturer technical documents, and academic papers. Equipment management engineers classify and label the collected materials according to the determined types.

[0008] As a preferred solution of the preventive maintenance method in the field of nuclear power plant overhaul described in the present invention, wherein: the review of reference materials and input into the system includes jointly reviewing the collected materials by equipment management engineers and technicians. The review content includes the reliability of the data source, the timeliness of the data, and the applicability of the data. Input the reviewed materials into the PMBD system to form structured data records, including information material names, material types, data sources, data content summaries, and attachments, and regularly update and maintain the PMBD system.

[0009] As a preferred solution of the preventive maintenance method in the field of nuclear power plant overhaul described in the present invention, wherein: the establishment of the preventive maintenance template includes a compilation team composed of equipment management engineers and technicians responsible for compiling the content of the PMT template. The template content includes associated ECM files, a scope description of the PMT template, a definition of the PMT equipment boundary, the type of equipment, the judgment basis for equipment working frequency and working environment, the main failure modes, and tasks for the failure modes, and determine the PMBD basis referred to in the template content.

[0010] The equipment management engineers and technicians conduct an internal review of the compiled PMT template and an external review by external experts.

[0011] Input the reviewed PMT template into the PMT template library to form structured data records, and regularly update the PMT template library.

[0012] As a preferred solution of the preventive maintenance method in the field of nuclear power plant overhaul described in the present invention, wherein: the establishment of the preventive maintenance template outline further includes clarifying the types of outlines to be compiled, including preventive maintenance outline, periodic test outline, damper outline, in-service inspection outline, and anti-corrosion outline. According to different outline types, create preventive maintenance outline documents, and the document content includes outline type, outline document, outline document code, outline document name, and outline description.

[0013] According to the outline type, clarify the scope of equipment and systems for which PMP needs to be compiled, including key equipment and important systems. Compile outlines for different objects according to different outline types and outline documents, input the compiled PMP into the preventive maintenance outline management system to form structured data records, and update the PMP regularly.

[0014] As a preferred solution of the preventive maintenance method in the field of nuclear power plant overhaul described in the present invention, wherein: the implementation of outline change management includes establishing a change request form for the preventive maintenance outline, describing the reasons for the outline change. Add a new preventive maintenance outline as an added item in the request form, edit the existing preventive maintenance outline as a modified item, and regard the invalid or incorrect outline as a deleted item. The content is jointly proposed by equipment management engineers, system engineers, and technicians, and the application is submitted.

[0015] The outline centralized management person accepts the PMPCR application in the system. After identifying the equipment management responsibilities involved, transfer it to the relevant equipment management responsibility department, and the system updates the PMPCR status to accepted.

[0016] The equipment management engineer evaluates the PMPCR, gives an evaluation conclusion and determines the modification content. The equipment management engineer fills in the evaluation opinions in the system, including the evaluation conclusion and specific modification suggestions.

[0017] The technical supervisor or deputy director of the department where the equipment management engineer is located reviews the evaluation conclusion and modification content. The technical supervisor or deputy director fills in the review opinions in the system, including the review conclusion and specific review suggestions.

[0018] The general assistant or deputy general manager in charge of equipment of the company gives the final approval to the evaluation conclusion and modification content.

[0019] As a preferred solution of the preventive maintenance method in the field of nuclear power plant overhaul described in the present invention, wherein: the project update includes that after the PMPCR proposer creates the PMPCR, a colleague creates a PMCR or associates a PMCR to confirm the update of the preventive maintenance database items affected by each outline change.

[0020] Another object of the present invention is to provide a preventive maintenance system in the field of nuclear power plant overhaul, which can solve the problems of lack of standardization, insufficient flexibility in template design and difficulty in adjusting to complex maintenance requirements in the current preventive maintenance technology of nuclear power plants by establishing a preventive maintenance template and a preventive maintenance template outline.

[0021] As a preferred solution of the preventive maintenance system in the field of nuclear power plant overhaul described in the present invention, it includes a data collection and review module, a template and outline establishment module, and a management and update module.

[0022] The data collection and review module is used to collect reference materials, review reference materials and input them into the system; the template and outline establishment module is used to establish a preventive maintenance template and a preventive maintenance template outline; the management and update module is used to perform outline change management and project update.

[0023] A computer device includes a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the steps of the preventive maintenance method in the field of nuclear power plant overhaul.

[0024] A computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, it implements the steps of the preventive maintenance method in the field of nuclear power plant overhaul.

[0025] The beneficial effects of the present invention: The preventive maintenance method in the field of nuclear power plant overhaul provided by the present invention collects reference materials, reviews reference materials and inputs them into the system, ensuring the comprehensiveness and reliability of information, improving the systematization and standardization of data management, laying a foundation for the scientific nature of preventive maintenance, establishing a preventive maintenance template and a preventive maintenance template outline, realizing the standardized, flexible and targeted design of the maintenance template, ensuring the scientific nature and reliability of the template content, providing strong support for accurate equipment maintenance and optimized maintenance strategies, performing outline change management and project update, realizing the standardization and traceability of outline change management, ensuring that the maintenance work adapts to dynamic changes, and improving the real-time and accuracy of maintenance management. The present invention achieves better effects in terms of the comprehensiveness and reliability of data management, the standardization and flexibility of maintenance templates, and the standardization and real-time of dynamic change management. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 The overall flowchart of a preventive maintenance method in the field of nuclear power plant major overhaul provided by the first embodiment of the present invention.

[0028] Figure 2 The overall flowchart of a preventive maintenance system in the field of nuclear power plant major overhaul provided by the third embodiment of the present invention. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1, referring to Figure 1 , which is an embodiment of the present invention, provides a preventive maintenance method in the field of nuclear power plant major overhaul, including:

[0031] S1: Collect reference materials, review the reference materials and enter them into the system.

[0032] Furthermore, collecting reference materials includes collecting different types of reference materials, including upstream and downstream regulations, industry standards, domestic and foreign industry experiences, manufacturer suggestions, and requirements of the nuclear power group. The equipment management engineer collects materials from internal and external channels. Collecting internal channel materials includes technical documents, historical maintenance records, and equipment manuals within the company. Collecting external channel materials includes industry standard organizations, international regulations, manufacturer technical documents, and academic papers. The equipment management engineer classifies and tags the collected materials according to the determined types.

[0033] It should be noted that reviewing the reference materials and entering them into the system includes jointly reviewing the collected materials by the equipment management engineer and technical personnel. The review content includes the reliability of the material source, the timeliness of the materials, and the applicability of the materials. Enter the reviewed materials into the PMBD system to form structured data records, including information material names, material types, material sources, material content summaries, attachments, and regularly update and maintain the PMBD system.

[0034] It should also be noted that PMBD (Preventive Maintenance Base Data) is a database for the basis of preventive maintenance program templates, used to store the basic data system related to preventive maintenance in nuclear power plants, including equipment history records, maintenance manuals, and remaining reference materials, providing comprehensive and accurate data support for maintenance plans; by collecting reference materials, reviewing them, and entering them into the system, a comprehensive collection of various types of materials has been achieved, including internal technical documents, historical maintenance records, and equipment manuals, as well as external industry standards, regulations, and academic papers. The diversity of these data sources ensures the comprehensiveness and reliability of information, thus enhancing the coverage and reference value of maintenance data. The review of materials by equipment management engineers and technicians, especially the verification of the reliability, timeliness, and applicability of the sources, guarantees the accuracy and practicality of the data entered into the PMBD system. Through strict review procedures, the problems of inaccurate and incomplete data in the past have been solved. The reviewed materials are entered into the PMBD system in a structured manner and maintained and updated regularly, achieving the systematization and standardization of data management. This not only provides high-quality data support for subsequent work but also improves the efficiency of data traceability and management during the maintenance process of nuclear power plants, laying a solid foundation for the scientific and systematic nature of preventive maintenance work.

[0035] S2: Establish a preventive maintenance template and a preventive maintenance template outline.

[0036] Furthermore, establishing a preventive maintenance template includes a compilation team consisting of equipment management engineers and technicians responsible for compiling the content of the PMT template. The template content includes associated ECM files, a scope description of the PMT template, the definition of the PMT equipment boundary, the type of equipment, the judgment basis for equipment working frequency and working environment, the main failure modes, and tasks for the failure modes, and determines the PMBD basis referred to in the template content.

[0037] The PMT template compiled by equipment management engineers and technicians is internally reviewed and externally reviewed by external experts.

[0038] The PMT template that has passed the review is entered into the PMT template library to form a structured data record, and the PMT template library is updated regularly.

[0039] It should be noted that establishing a preventive maintenance template outline also includes clarifying the types of outlines to be compiled, including preventive maintenance outlines, periodic test outlines, damper outlines, in-service inspection outlines, and anti-corrosion outlines. Create preventive maintenance outline files according to different outline types. The file content includes the outline type, outline file, outline file code, outline file name, and outline description.

[0040] According to the outline type, clarify the scope of equipment and systems for which PMP needs to be prepared, including key equipment and important systems. Prepare outlines for different objects according to different outline types and outline documents. Enter the prepared PMP into the preventive maintenance outline management system to form structured data records, and update the PMP regularly.

[0041] It should also be noted that the PMP prepares a standardized template for preventive maintenance tasks, covering equipment types, maintenance frequencies, failure modes, and corresponding task contents, providing standardized and systematic guidance to ensure the accuracy and consistency of maintenance work. The ECM file (Equipment Configuration Management) is a device configuration management file used to record the operating status, configuration information, and historical modification records of equipment, ensuring the traceability of equipment configuration and the scientific nature of maintenance work. The PMT (Preventive Maintenance Template) is a preventive maintenance outline template that prepares a standardized template for preventive maintenance tasks, covering equipment types, maintenance frequencies, failure modes, and corresponding task contents, providing standardized and systematic guidance to ensure the accuracy and consistency of maintenance work. By establishing the PMT template, the key elements related to the ECM file, equipment boundaries, failure modes, and corresponding tasks are clarified. This structured and standardized template content design solves the problems of unclear element definitions and unclear task assignments in previous maintenance templates, providing a basis for precise equipment maintenance. Establish a preventive maintenance template outline. By clarifying the outline type (such as preventive maintenance outline, anti-corrosion outline) and the applicable scope of equipment and systems, ensure that different outlines can be tailored to different equipment characteristics and operating environments. This modular and classified design improves the flexibility of the outline and solves the problem of insufficient template adaptability in the existing technology. Through the review mechanism (including internal and external expert reviews), the scientific nature and reliability of the template content are improved.

[0042] S3: Conduct outline change management and project update.

[0043] Furthermore, conducting outline change management includes establishing a change request form for the preventive maintenance outline, describing the reasons for the outline change. Add a new preventive maintenance outline as an additional item in the request form, edit the existing preventive maintenance outline as a modification item, and regard the invalid or incorrect outline as a deletion item. The content is jointly proposed by the equipment management engineer, system engineer, and technician and submitted for application.

[0044] The person in charge of the outline acceptance accepts the PMPCR application in the system. After identifying the equipment management responsibilities involved, transfer it to the relevant equipment management responsibility department, and the system updates the PMPCR status to accepted.

[0045] The equipment management engineer evaluates the PMPCR, gives an evaluation conclusion and determines the modification content. The equipment management engineer fills in the evaluation opinions in the system, including the evaluation conclusion and specific modification suggestions.

[0046] The technical supervisor or deputy director of the department where the equipment management engineer belongs reviews the evaluation conclusion and modification content. The technical supervisor or deputy director fills in the review opinions in the system, including the review conclusion and specific review suggestions.

[0047] The general assistant or deputy general manager in charge of equipment of the company gives the final approval to the evaluation conclusion and modification content.

[0048] It should be noted that project updates include that after the person who proposed the PMPCR creates the PMPCR, colleagues create PMCRs or associate PMCRs, and confirm the update of the preventive maintenance database items affected by each outline change.

[0049] It should also be noted that PMPCR (Preventive Maintenance Program Change Request) is an application for preventive maintenance program change, a process document or system module used to apply for and record preventive maintenance program changes, involving the links of change application, evaluation, review and approval, used for standardized change management to ensure the rationality and scientific nature of changes. PMCR (Preventive Maintenance Change Record) is an application for preventive maintenance items, a document or system module that records the specific information of each maintenance change, used to track the implementation and impact of changes, provide reference for future maintenance work, and keep the maintenance system updated; by establishing a change application form and detailing the reasons and content classification (new, modified, deleted) of changes, the systematization and standardization of change management are realized, the problems of information chaos and difficult traceability in traditional change management are solved, the transparency and traceability of change applications are improved. The equipment management engineer evaluates the change content and fills in detailed evaluation opinions in the system, and then it is reviewed and approved by the technical supervisor or deputy director and the company's senior management. Through a strict multi-level review process, the scientific nature and rationality of the change content are ensured, the equipment maintenance risks brought by unreasonable changes are reduced. Through the project update link, the change content is updated to the preventive maintenance database in real time to ensure that the latest requirements of the maintenance work are consistent with the actual implementation. This real-time relevance solves the problem of the lag in the reflection of the impact of previous changes on the database, effectively improves the dynamic adaptability and work efficiency of the system. By optimizing the change management and database update processes, the real-time nature and accuracy of the nuclear power plant's maintenance work are improved, providing strong support for ensuring the safe operation of equipment.

[0050] Example 2, an embodiment of the present invention, provides a preventive maintenance method in the field of nuclear power plant overhauls. To verify the beneficial effects of the present invention, scientific demonstrations are carried out through economic benefit calculations and simulation experiments.

[0051] First, to improve the efficiency and reliability of equipment management, the experiment is based on the equipment management system of a certain nuclear power plant and simulates the establishment, review, and outline change management process of the preventive maintenance template (PMT). The experiment covers the entire process from reference data collection to the compilation, review, entry, and change management of the outline template. The implementation steps of the experiment are as follows: Collect reference data. Equipment management engineers first collect reference data related to equipment management from internal and external channels of the company, including historical maintenance records, technical manuals, manufacturer suggestions, and domestic and foreign industry standards. The data is sorted according to classification labels such as regulatory standards, industry experience, and manufacturer documents. To verify the data classification efficiency, 30 types of reference data are selected, and the accuracy rate of each data classification label is verified through random sampling to ensure the accuracy of classification. Review the reference data and enter it into the system. The equipment management engineers and technicians conduct a double review of the data to confirm its reliability, timeliness, and applicability, and finally enter it into the PMBD (Preventive Maintenance Database) system. Each data record includes name, type, source, abstract, and attachment link, and the system will automatically generate a data number. The key indicators at this stage are the review passing rate and the completeness rate of the entered data. Through the system log, the average time consumed for data review and the entry efficiency are statistically calculated. Establish a preventive maintenance template. The PMT template team responsible for template compilation, and the template content includes associated ECM files, equipment boundary definitions, failure modes, and task descriptions. Each template content is constructed with reference to the PMBD basis and undergoes two-level reviews by internal and external experts. After the template compilation is completed, it is entered into the PMT template library. The experiment evaluates the template generation time and the review passing rate. Conduct outline change management and project update. The experiment simulates three types of change scenarios: adding, modifying, and deleting outlines. The equipment management engineer submits a PMPCR change application through the system. After being reviewed by the centralized manager, it is transferred to the relevant department for evaluation and approval. After the approval is completed, the system updates the outline status and completes the update operation of the relevant project. The key evaluation indicators are the average processing time of the change application and the approval efficiency. From the experimental results, it can be seen that the present invention improves the standardization and accuracy of data management, provides a scientific basis and technical support for equipment management, and has practical application value.

[0052] Example 3, referring to Figure 2 , an embodiment of the present invention, provides a preventive maintenance system in the field of nuclear power plant overhauls, including a data collection and review module, a template and outline establishment module, and a management update module.

[0053] Among them, the data collection and review module is used to collect reference materials, review the reference materials and input them into the system; the template and outline establishment module is used to establish a preventive maintenance template and establish a preventive maintenance template outline; the management and update module is used to perform outline change management and project update.

[0054] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The foregoing storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROMs, Read-Only Memories), random access memories (RAMs, Random Access Memories), magnetic disks, or optical discs and other various media that can store program codes.

[0055] The logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch instructions from the instruction execution system, apparatus, or device and execute the instructions), or in combination with these instruction execution systems, apparatuses, or devices. For the 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 connection with an instruction execution system, apparatus, or device.

[0056] More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection part with one or more wirings (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which a program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, then editing, interpreting, or otherwise processing it as appropriate, and then storing it in a computer memory.

[0057] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A preventive maintenance method in the field of nuclear power plant overhauls, characterized in that Including: Collect reference materials, review reference materials and enter them into the system; Establish preventive maintenance templates and establish the outline of preventive maintenance templates; Conduct outline change management and project updates.

2. The preventive maintenance method in the field of nuclear power plant overhaul as described in claim 1, characterized in that: The collection of reference materials includes collecting different types of reference materials, including upstream and downstream regulations, industry standards, domestic and foreign industry experiences, manufacturer suggestions, and requirements of the nuclear power group. Equipment management engineers collect materials from internal and external channels. Collecting internal channel materials includes technical documents, historical maintenance records, and equipment manuals within the company. Collecting external channel materials includes industry standard organizations, international regulations, manufacturer technical documents, and academic papers. Equipment management engineers classify and label the collected materials according to the determined types.

3. The preventive maintenance method in the field of nuclear power plant overhaul as described in claim 2, characterized in that: The review of reference materials and entry into the system includes equipment management engineers and technicians jointly reviewing the collected materials. The review content includes the reliability of the material source, the timeliness of the materials, and the applicability of the materials. The materials that pass the review are entered into the PMBD system to form structured data records, including the name of the information material, the type of material, the source of the material, the abstract of the material content, attachments, and the PMBD system is updated and maintained regularly.

4. The preventive maintenance method in the field of nuclear power plant overhauls as described in claim 3, characterized in that: The establishment of preventive maintenance templates includes a compilation team composed of equipment management engineers and technicians responsible for compiling the content of the PMT template. The template content includes associated ECM files, the scope description of the PMT template, the definition of the PMT equipment boundary, the type of equipment, the judgment basis for the equipment working frequency and working environment, the main failure modes, and the tasks for the failure modes, and determine the PMBD basis referred to in the template content; The PMT template compiled by equipment management engineers and technicians is internally reviewed and externally reviewed by external experts; The PMT template that passes the review is entered into the PMT template library to form structured data records, and the PMT template library is updated regularly.

5. The preventive maintenance method in the field of nuclear power plant overhauls according to claim 4, characterized in that: The establishment of the preventive maintenance template outline also includes clarifying the types of outlines to be compiled, including preventive maintenance outlines, periodic test outlines, damper outlines, in-service inspection outlines, and anti-corrosion outlines. Create preventive maintenance outline files according to different outline types. The file content includes outline type, outline file, outline file code, outline file name, and outline description; According to the outline type, clarify the scope of equipment and systems for which PMP needs to be compiled, including key equipment and important systems. Compile outlines for different objects according to different outline types and outline files. Enter the compiled PMP into the preventive maintenance outline management system to form structured data records, and update the PMP regularly.

6. The preventive maintenance method in the field of nuclear power plant overhauls as described in claim 5, characterized in that: The conduct of outline change management includes establishing a change request form for the preventive maintenance outline, describing the reasons for the outline change. Add a new preventive maintenance outline as an added item in the request form, edit the existing preventive maintenance outline as a modified item, and regard the invalid or incorrect outline as a deleted item. The content is jointly proposed by equipment management engineers, system engineers, and technicians and submitted for application; The PMPCR application is accepted in the system by the outline centralized management person. After identifying the equipment management responsibilities involved, it is transferred to the relevant equipment management responsibility departments, and the system updates the PMPCR status to "accepted". The PMPCR is evaluated by the equipment management engineer, who gives an evaluation conclusion and determines the modification content. The equipment management engineer fills in the evaluation opinions in the system, including the evaluation conclusion and specific modification suggestions. The evaluation conclusion and modification content are reviewed by the technical supervisor or deputy director of the department where the equipment management engineer is located. The technical supervisor or deputy director fills in the review opinions in the system, including the review conclusion and specific review suggestions. The evaluation conclusion and modification content are finally approved by the general assistant or deputy general manager in charge of equipment of the company.

7. The preventive maintenance method in the field of nuclear power plant overhaul as described in claim 6, characterized in that: The project update includes that after the PMPCR proposer creates the PMPCR, a PMCR is created or associated by a colleague, and the preventive maintenance database items affected by each outline change are confirmed and updated.

8. A system adopting the preventive maintenance method in the field of nuclear power plant overhaul as described in any one of claims 1 to 7, characterized in that: It includes a data collection and review module, a template and outline establishment module, and a management update module. The data collection and review module is used to collect reference materials, review the reference materials and enter them into the system. The template and outline establishment module is used to establish a preventive maintenance template and a preventive maintenance template outline. The management update module is used to conduct outline change management and project update.

9. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the preventive maintenance method in the field of nuclear power plant overhaul described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the preventive maintenance method in the field of nuclear power plant overhaul described in any one of claims 1 to 7.

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