Management Method and System for Vibration Data of Small Branch Pipes in Nuclear Power

Abstract

The present invention relates to a management method and system for vibration data of small nuclear power branch pipes. The management method includes: integrating the vibration data of small branch pipes from multiple data sources through a database, where the vibration data of small branch pipes from multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data; evaluating and grading each small branch pipe according to the vibration data of small branch pipes in the database; during a major overhaul, determining the inspection list and renovation list of small branch pipes according to the evaluation and grading results and inspection and renovation requirements, and recording the inspection plan and renovation plan of small branch pipes in the database. Moreover, after renovation, the vibration data of small branch pipes in the database is updated, and each small branch pipe is re-evaluated and graded according to the vibration data of small branch pipes in the database. Implementing the technical solution of the present invention can effectively improve the accuracy and timeliness of the management of small branch pipe vibration data and save manpower.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power, and particularly to a method and system for managing vibration data of small branch pipes in nuclear power plants. Background Art

[0002] As an important part of the pipeline system, small branch pipes mainly refer to instrument and mechanical pipelines with a nominal diameter ≤ 80 mm. Such pipelines are generally led out as branch pipes of the main pipeline, so they are called small branch pipes. Small branch pipes are one of the main weak links in the pipe system and are prone to weld cracking and pipe fracture. According to the feedback of international nuclear power plant operation experience, since 1970, more than a thousand small-sized pipeline vibration fatigue cracking events have occurred, accounting for 18.7% of the total number of pipeline failure events in light water reactor nuclear power plants. During the operation of domestic nuclear power plants, dozens of small-sized pipeline vibration fatigue cracking events have also occurred, and in severe cases, it has even led to unit shutdown.

[0003] There is currently a vibration classification management plan for the vibration management of small branch pipes in power plants. However, due to the large number of small branch pipes and large amounts of vibration data in power plants, the existing management methods generally involve decentralized management of vibration data from different data sources of small branch pipes through spreadsheets, which cannot effectively share data, ensure data accuracy, and also consume a large amount of manpower. Therefore, a feasible management method for small branch pipe vibration data is also needed to ensure the accuracy and timeliness of small branch pipe vibration data. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for managing vibration data of small branch pipes in nuclear power plants in view of the defects of the existing technology, such as the inability to share small branch pipe vibration data and low accuracy.

[0005] The technical solution adopted by the present invention to solve its technical problems is to construct a method for managing vibration data of small branch pipes in nuclear power plants, including:

[0006] Step S10. Integrate the vibration data of small branch pipes from multiple data sources through a database, where the vibration data of small branch pipes from the multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data;

[0007] Step S20. Evaluate and classify each small branch pipe according to the small branch pipe vibration data in the database;

[0008] Step S30. During a major overhaul, determine the inspection list and renovation list of small branch pipes according to the evaluation and classification results and inspection and renovation requirements, record the inspection plan and renovation plan of small branch pipes in the database, and moreover, update the small branch pipe vibration data in the database after renovation and re-evaluate and classify each small branch pipe according to the small branch pipe vibration data in the database.

[0009] Preferably, after step S20, the method further includes:

[0010] Step S40. Collect experience feedback information of small branch pipes of multiple power plants, and determine an inspection list and a modification list for corresponding small branch pipes according to the experience feedback information and the small branch pipe vibration data in the database, wherein the experience feedback information includes attention issues and internal operation events related to abnormal vibration of small branch pipes.

[0011] Preferably, the step S40 includes:

[0012] Step S41. Collect experience feedback information of small branch pipes of multiple power plants;

[0013] Step S42. Analyze the experience feedback information and extract keywords;

[0014] Step S43. When it is determined that there is feedback value, determine associated small branch pipes according to the keywords and the small branch pipe vibration data in the database, and determine the inspection list, modification list, inspection requirements, and modification requirements for the associated small branch pipes.

[0015] Preferably, the step S20 includes:

[0016] Step S21. Select corresponding parameters from the database, and calculate the allowable vibration velocity of the small branch pipes according to the small branch pipe type, where the allowable vibration velocity includes the allowable effective vibration velocity of the pipeline and the allowable peak vibration velocity of the pipeline;

[0017] Step S22. Conduct stress analysis on the small branch pipes to obtain the allowable stress;

[0018] Step S23. Evaluate and classify each small branch pipe according to the vibration value, stress value in the small branch pipe vibration stress data in the database, the calculated allowable vibration velocity of the small branch pipe, and the allowable stress.

[0019] Preferably, in the step S30, record the inspection plan and modification plan of the small branch pipes in the database, including:

[0020] Record the inspection time, inspection content, inspection results, description of abnormal events during inspection, and handling situations in the database;

[0021] Record the modification time, modification content, description of abnormal events during modification and handling situations, and vibration data after re - identification after modification in the database.

[0022] The present invention also constructs a management system for nuclear power small branch pipe vibration data, including:

[0023] A data module for integrating the vibration data of small branch pipes from multiple data sources through a database, where the vibration data of small branch pipes from the multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data;

[0024] An evaluation module for evaluating and grading each small branch pipe according to the small branch pipe vibration data in the database;

[0025] An inspection and renovation module for determining the inspection list and renovation list of small branch pipes according to the evaluation grading results, inspection and renovation requirements during major overhauls, recording the inspection plan and renovation plan of small branch pipes in the database, and moreover, updating the small branch pipe vibration data in the database after renovation and re-evaluating and grading each small branch pipe according to the small branch pipe vibration data in the database.

[0026] Preferably, it further includes:

[0027] An experience feedback module for collecting experience feedback information of small branch pipes from multiple power plants and determining the inspection list and renovation list of corresponding small branch pipes according to the experience feedback information and the small branch pipe vibration data in the database, where the experience feedback information includes attention issues and internal operation events related to abnormal vibration of small branch pipes.

[0028] Preferably, the experience feedback module includes:

[0029] A collection unit for collecting experience feedback information of small branch pipes from multiple power plants;

[0030] An extraction unit for analyzing the experience feedback information and extracting keywords;

[0031] A determination unit for determining the associated small branch pipes according to the keywords and the small branch pipe vibration data in the database, and determining the inspection list, renovation list, inspection requirements and renovation requirements of the associated small branch pipes.

[0032] Preferably, the evaluation module includes:

[0033] A calculation unit for selecting corresponding parameters from the database and calculating the allowable vibration velocity of small branch pipes according to the small branch pipe type, where the allowable vibration velocity includes the allowable effective vibration velocity of the pipeline and the allowable peak vibration velocity of the pipeline;

[0034] An analysis unit for performing stress analysis on small branch pipes to obtain allowable stress;

[0035] A grading unit for evaluating and grading each small branch pipe according to the vibration value, stress value in the small branch pipe vibration stress data in the database and the calculated allowable vibration velocity and allowable stress of small branch pipes.

[0036] Preferably, the inspection and transformation module includes:

[0037] Record the inspection time, inspection content, inspection results, description of abnormal events during inspection and handling situations in the database;

[0038] Record the transformation time, transformation content, description of abnormal events during transformation and handling situations, and vibration data after re - identification in the database.

[0039] The technical solution provided by the present invention can not only integrate the vibration data of small branch pipes from multiple data sources, but also, in addition to recording the vibration data of small branch pipes in the database, it also records the inspection and transformation situations of small branch pipes in real - time, and adjusts the grading of small branch pipes in a timely manner according to the inspection and transformation situations. Therefore, it can effectively improve the accuracy and timeliness of the management of small branch pipe vibration data, and save manpower. Brief Description of the Drawings

[0040] In order to more clearly illustrate the embodiments of the present invention, the drawings required for the description of 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. In the drawings:

[0041] Figure 1 is the flowchart of the first embodiment of the method for managing the vibration data of small branch pipes in nuclear power plants of the present invention;

[0042] Figure 2 is Figure 1 the flowchart of step S30 in the first embodiment;

[0043] Figure 3 is the flowchart of the second embodiment of the method for managing the vibration data of small branch pipes in nuclear power plants of the present invention;

[0044] Figure 4 is Figure 1 the flowchart of step S20 in the first embodiment;

[0045] Figure 5 is the flowchart of the first embodiment of calculating the allowable vibration speed of small branch pipes of the present invention;

[0046] Figure 6 is the logical structure diagram of the first embodiment of the management system for the vibration data of small branch pipes in nuclear power plants of the present invention. Detailed Embodiments

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Figure 1 It is a flowchart of the first embodiment of the management method for the vibration data of small branch pipes in nuclear power plants of the present invention. The management method of this embodiment includes:

[0049] Step S10. Integrate the vibration data of small branch pipes from multiple data sources through a database. The vibration data of small branch pipes from the multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data;

[0050] In this step, the vibration data of small branch pipes includes: small branch pipe structure parameter data, small branch pipe vibration stress data. Among them, the small branch pipe structure parameter data mainly includes: pipeline number, pipe diameter, wall thickness, material, valve number, safety level, valve type (primary valve, secondary valve), valve length, valve mass, other concentrated masses of the pipeline (except valves), isometric drawing number, flow chart number, function of pipeline valves, whether it will cause turbine trip or reactor trip, whether it is directly connected to the main steam circuit, on-site location of small branch pipes, whether it is directly connected to the container, type of small branch pipes (first type, second type), main pipe diameter, main pipe wall thickness, main pipe safety level, vibration source location, welding type at the root of the branch pipe (socket welding, butt welding), on-site photos, etc.; the small branch pipe vibration stress data includes the vibration value of small branch pipes, vibration measurement time, vibration measurement condition, vibration measurement personnel, vibration measurement location, vibration measurement direction, vibration frequency spectrum, vibration measurement source (pre-service vibration census, classified supplementary inspection of small branch pipes, daily vibration measurement), stress value (measured or simulated and calculated), stress measurement location, maximum stress location, stress measurement time, stress measurement condition, stress measurement personnel, etc.

[0051] Moreover, since the sources of the above-mentioned vibration data of small branch pipes involve pre-service vibration census, classified supplementary inspection of small branch pipes, daily vibration measurement of small branch pipes, etc., and the purposes and focuses of each data source are different, this solution effectively integrates the vibration data of small branch pipes from multiple data sources through a database, enabling the data of each data source to be shared, facilitating searching and comparative analysis.

[0052] Step S20. Evaluate and classify each small branch pipe according to the vibration data of small branch pipes in the database;

[0053] In this step, when evaluating small branch pipes, it is mainly carried out through the vibration and stress of small branch pipes, and classification is carried out according to the evaluation results.

[0054] Step S30. During major overhauls, determine the inspection list and renovation list for the small branch pipes according to the evaluation and grading results and the inspection and renovation requirements, record the inspection plan and renovation plan for the small branch pipes in the database. Moreover, after renovation, update the vibration data of the small branch pipes in the database, and re-evaluate and grade each small branch pipe according to the vibration data of the small branch pipes in the database.

[0055] In this step, combined with Figure 2 , according to the evaluation and grading results of the small branch pipes obtained in step S20, and combined with the inspection and renovation requirements, automatically generate the inspection list and renovation list for the small branch pipes that need to be executed during each major overhaul. Among them, the inspection list includes the weld inspection list and the pipe clamp inspection list. Specifically, first, the software identifies the number of pipelines at each grading level in different systems. According to the planned number of pipelines to be inspected (set manually according to the length of the major overhaul time), combined with the completed inspections and the requirements of graded inspections, the software gives the systems to be inspected and the corresponding lists, and generates the specific information of the welds that need to be inspected according to the weld information in the vibration data of the small branch pipes, which is convenient for on-site personnel to execute. The renovation list is given by the renovation personnel according to the vibration and stress data of the small branch pipes.

[0056] During major overhauls, according to the generated inspection list, on-site personnel can perform non-destructive testing (radiographic testing, liquid penetrant testing) on the welds and inspect the pipeline pipe clamps, and judge whether the inspections are qualified. For example, the judgment of whether the pipe clamp inspection is qualified includes: checking whether the pipe clamp is loose, whether the pipe clamp components are complete, whether the pipe clamp span meets the requirements, whether the position and type of the pipe clamp are consistent with the drawings, and checking whether there is installation stress in the pipe clamp, etc. According to the results of the major overhaul inspections, if any abnormalities are found during the inspections, arrangements will be made for handling during the major overhaul, and re-inspection will be carried out after handling. The inspection results, the content of abnormal handling, and the results after handling need to be recorded in the database. In addition, for the abnormalities found during the inspections, cause analysis needs to be carried out, and it is necessary to judge whether there are common problems. If there are common problems, feedback inspections need to be carried out on similar equipment.

[0057] The renovation of the small branch pipes is carried out during major overhauls. After the renovation is completed, the vibration data of the small branch pipes in the database needs to be updated accordingly to make the information in the database consistent with the on-site situation. The renovated small branch pipes also need to be re-identified after renovation. During the re-identification period, the vibration and stress data of the pipelines are measured, and the small branch pipes are re-evaluated and graded according to the actual vibration and stress data of the pipelines. If the stress still exceeds the standard after renovation, further renovation and optimization are required.

[0058] Through the technical solution of this embodiment, not only can the vibration data of small branch pipes from multiple data sources be integrated, but also in addition to recording the vibration data of small branch pipes in the database, the inspection and renovation conditions of small branch pipes are recorded in real time, and the classification of small branch pipes is adjusted in a timely manner according to the inspection and renovation conditions. Therefore, the accuracy and timeliness of the management of the vibration data of small branch pipes can be effectively improved.

[0059] Figure 3 FIG. 4 is a flowchart of the second embodiment of the management method for the vibration data of small branch pipes in nuclear power plants of the present invention. The management method of this embodiment is different from the Figure 2 embodiment shown only in that it further includes:

[0060] Step S40. Collect the experience feedback information of small branch pipes from multiple power plants, and determine the inspection list and renovation list of the corresponding small branch pipes according to the experience feedback information and the vibration data of the small branch pipes in the database, where the experience feedback information includes the concerned issues and internal operation events related to the abnormal vibration of small branch pipes.

[0061] In this embodiment, by collecting the experience feedback information of small branch pipes from each power plant, mainly including the feedback information such as the concerned issues (CQ) and internal operation events (IOE) related to the abnormal vibration of small branch pipes, for example, the vibration and fracture events of small branch pipes that occur in each power plant. Then, according to this experience feedback information and the vibration data of the small branch pipes in this power plant, the small branch pipes associated with the abnormal vibration in the experience feedback information are determined, and the inspection list and renovation list of these small branch pipes are determined.

[0062] In an alternative embodiment, step S40 specifically includes:

[0063] Step S41. Collect the experience feedback information of small branch pipes from multiple power plants;

[0064] Step S42. Analyze the experience feedback information and extract keywords;

[0065] Step S43. When it is determined that there is feedback value, determine the associated small branch pipes according to the keywords and the vibration data of the small branch pipes in the database, and determine the inspection list, renovation list, inspection requirements, and renovation requirements of the associated small branch pipes.

[0066] In this embodiment, first, the experience feedback information of small branch pipes from multiple power plants is collected, and then by analyzing each abnormal vibration event, keywords are extracted, and it is judged whether there is feedback value. If there is feedback value, the software will find the associated small branch pipes according to the extracted keywords combined with the stored vibration data of the small branch pipes, and formulate a list of small branch pipes that need to be inspected or renovated, and determine the specific inspection and renovation requirements.

[0067] In an alternative embodiment, step S20 specifically includes:

[0068] Step S21. Select corresponding parameters from the database, and calculate the allowable vibration velocity of the small branch pipe according to the small branch pipe type, where the allowable vibration velocity includes the allowable effective vibration velocity of the pipe and the allowable peak vibration velocity of the pipe;

[0069] Step S22. Conduct a stress analysis on the small branch pipe to obtain the allowable stress;

[0070] Step S23. Evaluate and grade each small branch pipe according to the vibration values, stress values in the small branch pipe vibration stress data in the database, the calculated allowable vibration velocity of the small branch pipe, and the allowable stress.

[0071] In a specific embodiment, according to Figure 4 the evaluation and grading principle shown, evaluate and grade the small branch pipes:

[0072] First, according to the small branch pipe vibration stress data in the database, give the allowable stress of the pipe. At the same time, according to the small branch pipe structure parameter information, automatically calculate the allowable vibration velocity of the small branch pipe according to the calculation formula of the allowable vibration velocity of the pipe in ASME OM 2017 and the empirical formula of EDF, so as to automatically give the evaluation and grading of the small branch pipe.

[0073] Since the calculation of the allowable vibration velocity of the pipe requires many parameters and is complex, therefore, in combination with Figure 5, using the vibration data of the small branch pipes in the database, automatically select the corresponding parameters, automatically determine the types of small branch pipes, further calculate the intermediate parameters, and finally calculate the allowable peak vibration velocity and the allowable effective value vibration velocity of the pipeline. Specifically, first determine the small branch pipe section to be calculated according to the isometric drawing of the small branch pipe. When calculating the allowable effective vibration velocity of the pipe section, first judge whether the type of the small branch pipe is the first type of small branch pipe. If it is the first type of small branch pipe, obtain from the database: the wall thickness of the main pipe, the diameter of the main pipe, the diameter of the small branch pipe, the pipeline material, and the valve mass, and then calculate the following intermediate parameters: the average radius of the main pipe, the outer radius of the pipe seat, the Poisson's coefficient, and the Young's modulus of elasticity. Finally, calculate the allowable effective value vibration velocity of the pipeline. If the type of the small branch pipe is not the first type of small branch pipe, obtain from the database: the diameter of the small branch pipe, the wall thickness of the small branch pipe, the length of the small branch pipe, the density of the pipeline material, the insulation thickness, the density of the insulation material, the density of the fluid inside the pipe, the length of the valve, and the concentrated mass, and then calculate the following intermediate parameters: parameter C0, C1, C2K2, C3, C4, C5. Finally, calculate the allowable effective value vibration velocity of the pipeline. When calculating the allowable peak vibration velocity of the pipeline, obtain from the database: the diameter of the small branch pipe, the wall thickness of the small branch pipe, the length of the small branch pipe, the density of the pipeline material, the insulation thickness, the density of the insulation material, the density of the fluid inside the pipe, the length of the valve, and the concentrated mass, and then calculate the following intermediate parameters: C1, C2K2, C3, C4, C5. Finally, calculate the allowable peak vibration velocity of the pipeline.

[0074] After calculating the allowable vibration velocity of the pipeline, first judge whether the vibration velocity of the small branch pipe is greater than or equal to 9 mm / s. If not, it is not included in the classification management. If so, further judge whether the vibration velocity is greater than or equal to 12 mm / s. If not, it is determined as vibration level 0; if so, further judge whether the vibration velocity is greater than or equal to the allowable vibration velocity. If not, it is determined as vibration level 1; if so, further judge whether the stress value is greater than or equal to the allowable stress. If not, it is determined as vibration level 2; if so, it is determined as vibration level 3. Moreover, transform the small branch pipe, and then judge whether the stress after transformation is qualified. If not, continue to transform until the pipeline vibration is qualified. Finally, it should be noted that if the small branch pipe affects tripping or stacking, it is all included in the classification management and the level is raised by one level on the basis of the classification.

[0075] In an alternative embodiment, in step S30, record the inspection plan and transformation plan of the small branch pipe in the database, including:

[0076] Record the inspection time, inspection content, inspection result, description of abnormal events during inspection and handling situation in the database;

[0077] Record the transformation time, transformation content, description of abnormal events during transformation and handling situation, and the vibration data after re-identification after transformation in the database.

[0078] Figure 6 It is the logical structure diagram of the first embodiment of the management system for the vibration data of small nuclear power branch pipes of the present invention. The management system of this embodiment includes: a data module 10, an evaluation module 20, and an inspection and renovation module 30. Moreover, the data module 10 is used to integrate the vibration data of small branch pipes from multiple data sources through a database. The vibration data of small branch pipes from the multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data; the evaluation module 20 is used to evaluate and classify each small branch pipe according to the vibration data of small branch pipes in the database; the inspection and renovation module 30 is used to determine the inspection list and renovation list of small branch pipes according to the evaluation classification results, inspection and renovation requirements during major repairs, and record the inspection plan and renovation plan of small branch pipes in the database. Specifically, record the inspection time, inspection content, inspection results, description of abnormal events during inspection and handling situations in the database; record the renovation time, renovation content, description of abnormal events during renovation and handling situations, and vibration data after re-identification after renovation in the database. Moreover, after renovation, update the vibration data of small branch pipes in the database, and re-evaluate and classify each small branch pipe according to the vibration data of small branch pipes in the database.

[0079] Furthermore, the evaluation module includes a calculation unit, an analysis unit, and a classification unit. Among them, the calculation unit is used to select corresponding parameters from the database and calculate the allowable vibration velocity of small branch pipes according to the type of small branch pipes. The allowable vibration velocity includes the allowable effective vibration velocity of the pipeline and the allowable peak vibration velocity of the pipeline; the analysis unit is used to perform stress analysis on small branch pipes to obtain the allowable stress; the classification unit is used to evaluate and classify each small branch pipe according to the vibration value, stress value in the vibration stress data of small branch pipes in the database, and the calculated allowable vibration velocity and allowable stress of small branch pipes.

[0080] The management system for the vibration data of small nuclear power branch pipes of this embodiment further includes an experience feedback module 40. The experience feedback module 40 is used to collect experience feedback information of small branch pipes from multiple power plants, and determine the inspection list and renovation list of corresponding small branch pipes according to the experience feedback information and the vibration data of small branch pipes in the database. Among them, the experience feedback information includes attention issues and internal operation events related to abnormal vibration of small branch pipes.

[0081] Furthermore, the experience feedback module includes: a collection unit, an extraction unit, and a determination unit. Moreover, the collection unit is used to collect experience feedback information of small branch pipes from multiple power plants; the extraction unit is used to analyze the experience feedback information and extract keywords; the determination unit is used to determine the associated small branch pipes according to the keywords and the vibration data of small branch pipes in the database, and determine the inspection list, renovation list, inspection requirements, and renovation requirements of the associated small branch pipes.

[0082] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A management method for vibration data of small nuclear power branch pipes, characterized in that, Including: Step S10. Integrate the vibration data of small branch pipes from multiple data sources through a database. The vibration data of small branch pipes from the multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data; Step S20. Evaluate and grade each small branch pipe according to the small branch pipe vibration data in the database; The step S20 includes: giving the allowable stress of the pipeline according to the small branch pipe vibration stress data in the database, and at the same time, automatically calculating the allowable vibration speed of the small branch pipe according to the small branch pipe structure parameter information; Step S30. During the major overhaul, determine the inspection list and renovation list of small branch pipes according to the evaluation and grading results and the inspection and renovation requirements, record the inspection plan and renovation plan of the small branch pipes in the database, and moreover, update the small branch pipe vibration data in the database after the renovation, and re-evaluate and grade each small branch pipe according to the small branch pipe vibration data in the database; wherein, the sources of the small branch pipe vibration data involve pre-service vibration census, supplementary investigation of small branch pipe grading, and daily vibration measurement of small branch pipes; The determination of the inspection list of small branch pipes according to the evaluation and grading results and the inspection and renovation requirements includes: Identifying the number of small branch pipes at each grade in different systems, determining the number of small branch pipes to be inspected as planned, and generating the systems to be inspected and the corresponding inspection lists in combination with the completed inspections and the grading inspection requirements; wherein, the inspection list includes a weld inspection list and a pipe clamp inspection list; In the step S30, recording the inspection plan and renovation plan of the small branch pipes in the database includes: Recording the inspection time, inspection content, inspection results, description of abnormal events during the inspection and the handling situation in the database; Recording the renovation time, renovation content, description of abnormal events during the renovation and the handling situation, and the vibration data after re-identification after the renovation in the database; Among them, for the abnormalities found during the inspection, it is necessary to analyze the reasons and judge whether there are common problems. If there are common problems, it is necessary to conduct feedback inspections on similar equipment; After step S20, it further includes: Step S40. Collect the experience feedback information of small branch pipes from multiple power plants, and determine the inspection list and renovation list of the corresponding small branch pipes according to the experience feedback information and the small branch pipe vibration data in the database, wherein the experience feedback information includes attention issues and internal operation events related to abnormal vibration of small branch pipes; The step S40 includes: Step S41. Collect the experience feedback information of small branch pipes from multiple power plants; Step S42. Analyze the experience feedback information and extract keywords; Step S43. When it is determined that there is feedback value, determine the associated small branch pipes according to the keywords and the small branch pipe vibration data in the database, and determine the inspection list, renovation list, inspection requirements, and renovation requirements of the associated small branch pipes; The step S20 includes: Step S21. Select the corresponding parameters from the database, and calculate the allowable vibration speed of the small branch pipe according to the small branch pipe type. The allowable vibration speed includes the allowable effective vibration speed of the pipeline and the allowable peak vibration speed of the pipeline; Step S22. Conduct stress analysis on the small branch pipes to obtain the allowable stress; Step S23. Evaluate and classify each small branch pipe according to the vibration values, stress values in the small branch pipe vibration stress data in the database, and the calculated allowable vibration speed and allowable stress of the small branch pipes.

2. A management system for vibration data of small nuclear power branch pipes, characterized in that, Including: A data module for integrating the small branch pipe vibration data of multiple data sources through a database. The small branch pipe vibration data of the multiple data sources includes small branch pipe structure parameter data and small branch pipe vibration stress data; An evaluation module for evaluating and classifying each small branch pipe according to the small branch pipe vibration data in the database; wherein, the sources of the small branch pipe vibration data involve pre-service vibration surveys, supplementary inspections for small branch pipe classification, and daily small branch pipe vibration measurements; The evaluation module includes: giving the allowable stress of the pipeline according to the small branch pipe vibration stress data in the database, and at the same time, automatically calculating the allowable vibration speed of the small branch pipes according to the small branch pipe structure parameter information; An inspection and renovation module for determining the inspection list and renovation list of the small branch pipes according to the evaluation and classification results and the inspection and renovation requirements during major repairs, recording the inspection plan and renovation plan of the small branch pipes in the database, and updating the small branch pipe vibration data in the database after renovation, and re-evaluating and classifying each small branch pipe according to the small branch pipe vibration data in the database; The inspection and renovation module includes: Recording the inspection time, inspection content, inspection results, description of abnormal events during inspection and handling situations in the database; Recording the renovation time, renovation content, description of abnormal events during renovation and handling situations, and vibration data after re-identification after renovation in the database; Among them, for the abnormalities found during inspection, cause analysis needs to be carried out, and it is necessary to judge whether there are common problems. If there are common problems, feedback inspections need to be carried out on similar equipment; The determination of the inspection list of the small branch pipes according to the evaluation and classification results and the inspection and renovation requirements includes: Identifying the number of small branch pipes at each level in different systems, determining the number of small branch pipes to be inspected as planned, and generating the systems to be inspected and the corresponding inspection lists in combination with the completed inspections and classification inspection requirements; wherein, the inspection list includes a weld inspection list and a pipe clamp inspection list; An experience feedback module for collecting experience feedback information of small branch pipes in multiple power plants, and determining the inspection list and renovation list of the corresponding small branch pipes according to the experience feedback information and the small branch pipe vibration data in the database. The experience feedback information includes attention issues and internal operation events related to abnormal small branch pipe vibrations; The experience feedback module includes: A collection unit for collecting experience feedback information of small branch pipes in multiple power plants; An extraction unit for analyzing the experience feedback information and extracting keywords; A determination unit for determining the associated small branch pipes according to the keywords and the small branch pipe vibration data in the database, and determining the inspection list, renovation list, inspection requirements and renovation requirements of the associated small branch pipes; The evaluation module includes: A calculation unit for selecting corresponding parameters from the database and calculating the allowable vibration velocity of the small branch pipe according to the type of the small branch pipe, where the allowable vibration velocity includes the allowable effective vibration velocity of the pipe and the allowable peak vibration velocity of the pipe; An analysis unit for performing stress analysis on the small branch pipe to obtain the allowable stress; A grading unit for evaluating and grading each small branch pipe according to the vibration value, stress value in the small branch pipe vibration stress data in the database, the calculated allowable vibration velocity of the small branch pipe, and the allowable stress.

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