Cable aging detection method, device and equipment for research reactor and storage medium

Abstract

The invention relates to the technical field of research reactor aging management and life extension, and provides a cable aging detection method, device and equipment for a research reactor and a storage medium, and the method comprises the steps: screening and determining target electric equipment from alternative electric equipment of an electric equipment system of the research reactor based on a preset screening criterion, and screening and determining a target cable from the alternative cables of the target electric instrument equipment based on a preset function execution criterion, screening and determining a detection cable from the target cables based on a preset aging detection criterion, and performing aging detection on the detection cable. According to the method provided by the invention, the cable needing aging detection is screened and determined in a process mode, the cable aging detection workload of a research reactor can be reduced, the cable aging management level of the research reactor is improved, and the aging management problem of the safe and important cable of the research reactor in the operation stage is solved; and the demonstration of life prolonging work of nuclear reactor facilities is supported.

Description

Technical Field

[0001] The present application relates to the technical field of research reactor aging management and life extension, and specifically to a cable aging detection method, device, equipment and storage medium for a research reactor. Background Art

[0002] The cables of nuclear reactors are used to transmit power and signals between the electrical and instrumentation equipment of the electrical and instrumentation system. Some cables that play a vital role in the safe and stable operation of nuclear reactors need to ensure that the nuclear reactors perform their intended functions under normal operation and accident conditions. During the service process, the cables will be affected by various factors such as temperature, radiation, and humidity, resulting in aging and degradation. If the cable aging detection is not carried out in a timely and accurate manner, it will pose a potential hidden danger to the operation of the nuclear reactor.

[0003] However, in the existing field of nuclear facility aging management technology, there is no aging and management method for cables of research reactors. Therefore, it is urgent to propose a cable screening and aging detection method for research reactors to solve the aging management problem of cables during the operation stage of research reactors. Summary of the invention

[0004] To solve the above problems, the present application provides a cable aging detection method, device, equipment and storage medium for a research reactor, which can comprehensively manage the aging status of the cables of the research reactor.

[0005] This application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a cable aging detection method for a research reactor, the method comprising:

[0007] Based on the preset screening criteria, select and determine the target electrical and instrument equipment from the candidate electrical and instrument equipment of the electrical and instrument system of the research reactor;

[0008] Based on the preset function execution criteria, select and determine the target cable from the candidate cables of the target electrical and instrumentation equipment;

[0009] Based on the preset aging detection criteria, the detection cable is selected from the target cables;

[0010] Perform aging test on the detection cable.

[0011] Optional, electrical and instrumentation system, including:

[0012] Power systems, instrumentation and control systems, lighting systems, radiation monitoring systems, and communication systems;

[0013] Optional cables, including:

[0014] Electrical cabinet busbar cables, low-voltage power cables and connectors, high-voltage power cables and connectors, instrumentation and control circuit cables and connectors.

[0015] Optional, pre-set screening criteria, including:

[0016] The first screening criterion is that the failure of the electrical and instrumentation equipment directly leads to the loss or damage of the shutdown function, residual heat removal function or radioactive material containment function of the research reactor;

[0017] The second screening criterion is that the electrical and instrumentation equipment is related to the function of warning of flooding or mitigating the consequences of flooding in research reactors;

[0018] The third screening criterion is that the electrical and instrumentation equipment is related to the function of restoring power failure when a power failure occurs in the research reactor;

[0019] Based on the preset screening criteria, the target electrical and instrumentation equipment is screened from the candidate electrical and instrumentation equipment of the research reactor electrical and instrumentation system, including:

[0020] Determining whether the candidate electrical instrument equipment meets the first screening criteria;

[0021] If the candidate electrical instrument equipment meets the first screening criteria, the candidate electrical instrument equipment is determined as the target electrical instrument equipment; if the candidate electrical instrument equipment does not meet the first screening criteria, it is determined whether the candidate electrical instrument equipment meets the second screening criteria; if the candidate electrical instrument equipment meets the second screening criteria, the candidate equipment is determined as the target electrical instrument equipment; if the candidate electrical instrument equipment does not meet the second screening criteria, the candidate equipment is eliminated;

[0022] Determine whether the candidate electrical and instrumentation equipment meets the third screening criteria;

[0023] If the candidate electrical instrument equipment meets the third screening criterion, the candidate electrical instrument equipment is determined as the target electrical instrument equipment; if the candidate electrical instrument equipment does not meet the third screening criterion, the candidate equipment is eliminated.

[0024] Optional, pre-set function execution criteria, including:

[0025] The first function execution criterion is that the cable performs the function of output voltage, output current or output signal;

[0026] The second function execution criterion is that the cable performs the insulation function;

[0027] Based on the preset functional execution criteria, the target cable is selected from the candidate cables of the target electrical equipment, including:

[0028] If the candidate cable meets the first function execution criterion or the second function execution criterion, the candidate cable is determined as the target cable.

[0029] Optional, pre-set aging detection criteria, including:

[0030] The first aging test criterion is that the cable has hot spots;

[0031] The second aging test criterion is that the ambient temperature of the cable is higher than the material limit temperature;

[0032] The third aging test criterion is that the 60-year accumulated radiation dose in the environment where the cable is located is higher than the material limit dose;

[0033] Based on the preset aging detection criteria, the detection cables are screened and determined from the target cables, including:

[0034] Identify the operating environment of the target cable;

[0035] Determining whether the target cable meets a first aging detection criterion according to an operating environment of the target cable;

[0036] If the target cable meets the first aging detection criterion, the target cable is determined as a detection cable;

[0037] If the target cable does not meet the first aging detection criterion, determining the material of the target cable;

[0038] According to the material of the target cable, a target cable that meets the second aging detection criterion or the third aging detection criterion is determined as a detection cable.

[0039] Optionally, identify the operating environment of the target cable, including:

[0040] Identify the operating area conditions of the target cable;

[0041] Determine the environmental monitoring parameters of the target cable;

[0042] Query the operation record file of the target cable;

[0043] Troubleshoot unexpected service conditions of target cables;

[0044] Determine the operating environment of the target cable based on operating area conditions, environmental monitoring parameters, operating record files, and unexpected service conditions.

[0045] Optionally, perform aging test on the detection cable, including:

[0046] The insulation reduction aging effect of the detection cable and the connection impedance increase aging effect are tested.

[0047] In a second aspect, the present application provides a cable aging detection device for a research reactor, the device comprising:

[0048] A target electrical instrument equipment determination unit is used to screen and determine the target electrical instrument equipment from candidate electrical instrument equipment of the electrical instrument system of the research reactor based on a preset screening criterion;

[0049] A target cable determination unit, used for selecting and determining a target cable from candidate cables of a target electrical and instrumentation device based on a preset function execution criterion;

[0050] A detection cable determination unit, used for screening and determining a detection cable from target cables based on a preset aging detection criterion;

[0051] The detection unit is used to perform aging detection on the detection cable.

[0052] In a third aspect, the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned cable aging detection method for a research reactor when executing the computer program.

[0053] In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program, which implements the steps of the above-mentioned cable aging detection method for a research reactor when instructed by a processor.

[0054] At least one of the above technical solutions adopted in this application can achieve the following beneficial effects:

[0055] The cable aging detection method for a research reactor provided in the present application first screens and determines the target electrical and instrument equipment from the candidate electrical and instrument equipment of the electrical and instrument system of the research reactor based on a preset screening criterion; then screens and determines the target cable from the candidate cables of the target electrical and instrument equipment based on a preset function execution criterion; then screens and determines the detection cable from the target cable based on a preset aging detection criterion; thereby performing aging detection on the detection cable. The cable aging detection method for a research reactor provided in the present application adopts a process-based approach to screen and determine the cables that need to be aging-detected, which can reduce the workload of cable aging detection of the research reactor and improve the cable aging management level of the research reactor; the cable aging detection method for a research reactor provided in the present application solves the aging management problem of safety-critical cables of the research reactor during the operation stage, and supports the demonstration of the life extension work of nuclear reactor facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0057] Figure 1 A schematic flow chart showing a method for detecting cable aging in a research reactor according to an embodiment of the present application is shown;

[0058] Figure 2A schematic diagram showing a process of screening and determining target electrical instrument equipment according to an embodiment of the present application;

[0059] Figure 3 A schematic diagram showing a process of screening and determining a detection cable according to an embodiment of the present application is shown;

[0060] Figure 4 A schematic structural diagram of a cable aging detection device for a research reactor according to an embodiment of the present application is shown;

[0061] Figure 5 A schematic diagram of the structure of a computer device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0063] The present application is described in detail below through specific embodiments.

[0064] Figure 1 The following is a schematic diagram showing a process flow of a cable aging detection method for a research reactor proposed in one embodiment of the present application. Figure 1 As shown, the method of this embodiment includes steps S110 to S140:

[0065] Step S110: based on preset screening criteria, screen and determine target electrical instrument equipment from candidate electrical instrument equipment of the electrical instrument system of the research reactor.

[0066] The electrical and instrumentation system of a research reactor may include an electrical system, an instrumentation system, etc. The electrical system may serve as the core of the electrical and instrumentation system, and mainly includes important electrical equipment; the instrumentation system may serve as an auxiliary of the electrical and instrumentation system, and monitor, process, adjust and control the electrical system through instrumentation equipment (which may include but is not limited to sensors / controllers / actuators, etc.).

[0067] In some embodiments of the present application, the electrical instrument system includes: a power supply system, an instrument and control system, a lighting system, a radiation monitoring system, and a communication system. The power supply system includes a conventional power supply system and an emergency (including backup) power supply system.

[0068] The electrical instrumentation system of a research reactor usually includes a large number of candidate electrical instrumentation equipment, some of which are crucial to the safe operation of the research reactor, while some of which have little impact on the safe operation of the research reactor. Therefore, screening criteria can be set in advance to screen and determine the target electrical instrumentation equipment that is important to the safe operation of the research reactor from the candidate electrical instrumentation equipment of the electrical instrumentation system of the research reactor.

[0069] The preset screening criteria may include but are not limited to the following aspects:

[0070] Whether the alternative electrical and instrumentation equipment has a direct impact on the safe operation of the research reactor; that is, if the alternative electrical and instrumentation equipment fails, which directly makes the research reactor unable to operate normally and safely, then this alternative electrical and instrumentation equipment plays an important role in the safe operation of the research reactor and can be screened and determined as the target electrical and instrumentation equipment.

[0071] Whether the alternative electrical and instrumentation equipment can directly determine the accident conditions of the research reactor; that is, if the alternative electrical and instrumentation equipment has abnormal conditions such as alarms, it can be directly determined that the research reactor cannot operate normally and safely. In this case, this alternative electrical and instrumentation equipment plays an important role in the safe operation of the research reactor and can be screened and determined as the target electrical and instrumentation equipment.

[0072] Whether the alternative electrical and instrumentation equipment has a direct impact on the recovery of the research reactor after an accident condition occurs; that is, if an accident condition occurs in the research reactor, in order to restore normal and safe operation, the alternative electrical and instrumentation equipment must be relied upon. In this case, this alternative electrical and instrumentation equipment plays an important role in the safe operation of the research reactor and can be screened and determined as the target electrical and instrumentation equipment.

[0073] Step S120: based on a preset function execution criterion, a target cable is screened and determined from candidate cables of the target electrical equipment.

[0074] The safety-critical cables of research reactors are the key objects of research reactor aging management. Safety-critical cables are used to indicate safety-grade cables that can perform safety functions in normal operation and accident conditions of research reactors. After screening and determining the target electrical and instrumentation equipment, the candidate cables (i.e., cable list) of the target electrical and instrumentation equipment can be sorted out to screen and determine the target cables that can perform safety functions.

[0075] In some embodiments of the present application, the alternative cables include: electrical cabinet busbar cables, low-voltage power cables and connectors, high-voltage power cables and connectors, and instrumentation and control circuit cables and connectors.

[0076] Insulated cables (including low-voltage power cables, high-voltage power cables, instrumentation and control circuit cables, etc.) are a combination of a single conductor and an insulating sheath, or a combination of mutually insulated conductors and a sheath that wraps them.

[0077] Connectors are used to connect cable conductors to other cables or electrical equipment. Connectors may include connectors, connection sleeves, terminal blocks, etc. Connectors are one or more contacts that are inserted or screwed into a mating socket and are used to connect electrical connectors, separate specific types of devices, and when multiple electrical connections need to be made simultaneously. A connection sleeve is an insulating material suitable for press-fit (such as bolted connections) or fused connections that can seal and isolate cables, contacts or terminals from the surrounding environment. A terminal block is an insulating seat with fixed contacts that is used to connect wires or terminal lugs and is usually installed in a closed housing in a control panel, motor control center, motor, junction box or protection switchboard. Terminal blocks may also include fuse holders.

[0078] Function execution criteria can be set in advance to screen and determine target cables that can execute safety functions from candidate cables of candidate electrical and instrumentation equipment.

[0079] The preset function execution criteria may include, but are not limited to: circuit connection and electrical insulation. Circuit connection may include connecting a specific circuit (such as under an accident condition); electrical insulation may include providing an insulation function, etc.

[0080] Step S130: Screen and determine the detection cable from the target cables based on the preset aging detection criteria.

[0081] After the target cable is determined, the range of cables that need to be tested for aging is further screened from the target cable. Therefore, the aging test criteria can be pre-set to screen and determine the range of cables that need to be tested for aging from the target cable.

[0082] Generally speaking, target cables in harsh environments tend to age faster and require more aging testing. Even for target cables that are not in harsh environments, the aging speed varies due to the different temperature and radiation resistance of different cable materials. Therefore, the preset aging test criteria can include but are not limited to the following aspects:

[0083] Whether the target cable has a harsh environment, that is, whether the environmental conditions of the target cable are worse than the typical environmental conditions of the area of ​​concern, and exceed the environmental conditions required for the design or continued operation of the research reactor cable. If the target cable has a harsh environment, it is necessary to detect the aging of the target cable, and this target cable can be screened and determined as a test cable.

[0084] Whether the monitoring temperature during the operation of the research reactor exceeds the upper temperature limit of the target cable, that is, whether the monitoring temperature during the operation of the research reactor is higher than the upper temperature limit of the material of the target cable. If the monitoring temperature during the operation of the research reactor exceeds the upper temperature limit of the material of the target cable, it is necessary to detect the aging of the target cable, and this target cable can be screened and determined as a detection cable.

[0085] Whether the monitoring radiation during the operation of the research reactor exceeds the upper limit of the radiation resistance of the target cable, that is, whether the monitoring radiation during the operation of the research reactor is higher than the upper limit of the radiation resistance of the material of the target cable. If the monitoring radiation during the operation of the research reactor exceeds the upper limit of the radiation resistance of the material of the target cable, it is necessary to detect the aging of the target cable, and this target cable can be screened and determined as a detection cable.

[0086] Step S140: performing aging detection on the detection cable.

[0087] After the detection cables that need to be tested for aging are screened and determined based on the above steps, aging testing is performed on the detection cables. Aging testing may include, but is not limited to, testing of insulation reduction aging effects and connection impedance increase aging effects. Testing methods may include, but are not limited to, insulation status testing and visual inspection.

[0088] from Figure 1 It can be seen from the method shown that the cable aging detection method for research reactors provided by the present application first screens and determines the target electrical and instrument equipment from the candidate electrical and instrument equipment of the electrical and instrument system of the research reactor based on the preset screening criteria; then screens and determines the target cable from the candidate cables of the target electrical and instrument equipment based on the preset function execution criteria; then screens and determines the detection cable from the target cable based on the preset aging detection criteria; thereby performing aging detection on the detection cable. The cable aging detection method for research reactors provided by the present application adopts a process-based approach to screen and determine the cables that need to be aging-detected, which can reduce the workload of cable aging detection of research reactors and improve the level of cable aging management of research reactors; the cable aging detection method for research reactors provided by the present application solves the aging management problem of safety-critical cables of research reactors during the operation stage, and supports the demonstration of the life extension of nuclear reactor facilities.

[0089] In some embodiments of the present application, in the above method, in step S110, the preset screening criteria include: a first screening criterion, failure of electrical and instrumentation equipment directly leads to loss or damage of the research reactor's shutdown function, residual heat extraction function, or radioactive material containment function; a second screening criterion, the electrical and instrumentation equipment is related to the function of flooding warning or mitigation of flooding consequences of the research reactor; a third screening criterion, the electrical and instrumentation equipment is related to the function of restoring power when a power outage occurs in the research reactor; based on the preset screening criteria, the target electrical and instrumentation equipment is screened and determined from the alternative electrical and instrumentation equipment of the electrical and instrumentation system of the research reactor, including: if the alternative electrical and instrumentation equipment meets any of the preset screening conditions, the alternative electrical and instrumentation equipment is determined as the target electrical and instrumentation equipment.

[0090] In order to identify the electrical and instrumentation equipment that have a significant impact on the safe operation of the research reactor or the recovery of accident conditions, three types of screening criteria are set in advance.

[0091] First screening criterion: whether the failure of the electrical and instrument equipment directly leads to the loss or damage of the shutdown function, residual heat removal function or radioactive material containment function of the research reactor. If the alternative electrical and instrument equipment is "yes", then this alternative electrical and instrument equipment is determined as the target electrical and instrument equipment.

[0092] The second screening criterion is whether the electrical and instrument equipment is related to the function of flooding warning or flooding consequence mitigation of the research reactor. Generally, research reactors usually provide flooding warnings to operators based on alarm devices. If the candidate electrical and instrument equipment participates in the warning action or participates in the response action of flooding consequence mitigation, then this candidate electrical and instrument equipment is determined as the target electrical and instrument equipment.

[0093] The third screening criterion: whether the electrical and instrumentation equipment is related to the function of restoring power when a power outage occurs in the research reactor. If a power outage occurs in the research reactor, the alternative electrical and instrumentation equipment related to the response and enabling the research reactor to restore power supply is determined as the target equipment.

[0094] When the candidate electrical instrument equipment meets any one of the preset screening criteria, the candidate electrical instrument equipment is determined as the target electrical instrument equipment. Only when the candidate electrical instrument equipment does not meet all the preset screening criteria, the candidate electrical instrument equipment is eliminated.

[0095] Specifically, Figure 2 A schematic diagram of a process for screening and determining target electrical equipment according to an embodiment of the present application is shown. Figure 2 As shown, the method for screening and determining target electrical instrument equipment may include the following steps:

[0096] Step S201, obtaining candidate electrical instrument equipment; proceeding to step S202 and step S203;

[0097] Step S202, determining whether the candidate electrical instrument equipment meets the first screening criteria; if so, proceeding to step S205; if not, proceeding to step S204;

[0098] Step S203, determining whether the candidate electrical instrument equipment meets the third screening criteria; if so, proceeding to step S205; if not, proceeding to step S206;

[0099] Step S204, determining whether the candidate electrical instrument equipment meets the second screening criteria; if so, proceeding to step S205; if not, proceeding to step S206;

[0100] Step S205, determining the candidate equipment as the target electrical instrument equipment;

[0101] Step S206: Eliminate candidate devices.

[0102] In some embodiments of the present application, in the above method, in step S120, the preset function execution criteria include: a first function execution criterion, the cable performs the function of output voltage, output current or output signal; a second function execution criterion, the cable performs the insulation function; based on the preset function execution criteria, the target cable is screened from the alternative cables of the target electrical equipment to determine the target cable, including: if the alternative cable meets the first function execution criterion or the second function execution criterion, the alternative cable is determined as the target cable.

[0103] In order to determine the cables that perform safety functions, two types of function performance criteria are preset.

[0104] The first function execution criterion: whether the cable performs the function of output voltage, output current or output signal. If the candidate cable is "yes", the candidate cable is determined as the target cable.

[0105] Second function execution criterion: whether the cable performs the insulation function. If the candidate cable is "yes", then this candidate cable is determined as the target cable.

[0106] When the candidate cable meets any one of the preset function execution criteria, the candidate cable is determined as the target cable. Only when the candidate cable does not meet all the preset function execution criteria, the candidate cable is eliminated.

[0107] In some embodiments of the present application, in the above method, in step S130, the preset aging detection criteria include: a first aging detection criterion, there is a hot spot area in the cable; a second aging detection criterion, the ambient temperature of the cable is higher than the material limit temperature; a third aging detection criterion, the 60-year accumulated radiation dose of the environment in which the cable is located is higher than the material limit dose; based on the preset aging detection criteria, screening and determining the detection cable from the target cables, including: identifying the operating environment of the target cable; determining whether the target cable meets the first aging detection criterion according to the operating environment of the target cable; if the target cable meets the first aging detection criterion, determining the target cable as the detection cable; if the target cable does not meet the first aging detection criterion, determining the material of the target cable; according to the material of the target cable, determining the target cable that meets both the second aging detection criterion and the third aging detection criterion as the detection cable.

[0108] In order to determine the monitoring cables with aging detection value, three types of aging detection criteria are preset.

[0109] The first aging detection criterion: whether there is a hot spot area in the cable. If the target cable is "yes", then this target cable is determined as the detection cable.

[0110] Hotspot areas can be local harsh environments, where environmental conditions are more severe than the typical environmental conditions in the area of ​​concern and exceed the environmental conditions required for the cable design or continued operation of the research reactor. Hotspot areas may include, but are not limited to: high temperature areas, chemically contaminated areas, high radiation areas, mechanical vibration areas, etc.

[0111] High temperature areas may include, but are not limited to, areas near hot pipes, areas where there are devices that transfer heat to cables, areas of self-heating (such as power cables), areas with ineffective ventilation, areas of steam leakage, areas near high temperature equipment (such as electric heaters), areas with seals, fire barriers or other areas that reduce the heat dissipation capacity of cables, etc. Chemical contamination areas may include, but are not limited to, areas where solvents, lubricants or chemical reagents that are incompatible with cable materials are used, etc. High irradiation areas may include, but are not limited to, areas near high-dose sources (pipes, valves), etc. Mechanical vibration areas may include, but are not limited to, areas where cables are directly affected by mechanical vibration, etc.

[0112] The second aging test criterion: whether the ambient temperature of the cable is higher than the material limit temperature.

[0113] The third aging test criterion: whether the 60-year accumulated radiation dose of the cable environment is higher than the material limit dose.

[0114] The cable materials of the research reactor may include, but are not limited to: busbar insulation hose, butyl rubber, chloroprene, aminoprene, chlorosulfonated polyethylene, cross-linked polyethylene, epoxy, ethylene propylene rubber, Hailaer, high temperature asphalt, flame retardant asphalt, flame retardant asphalt, melamine, phenol, polyamide, nylon, polyethylene, polyimide, polypropylene, polyvinyl chloride, silicone rubber, Teflon, ethylene-tetrafluoroethylene copolymer, fire cable sheath (nuclear grade), etc. According to the material properties of the cable of the research reactor, the material limit temperature and the material limit dose of the cable are determined. The following Table 1 exemplarily shows the material limit temperature and material limit dose of the cable material of the research reactor.

[0115] Table 1:

[0116]

[0117]

[0118] When there is no hot spot area in the target cable, but the ambient temperature of the target cable is higher than the material limit temperature, or the 60-year accumulated radiation dose of the environment in which the target cable is located is higher than the material limit dose, the target cable is determined to be a test cable.

[0119] When there is no hot spot area in the target cable, the ambient temperature of the target cable is not higher than the material limit temperature, and the 60-year accumulated radiation dose of the environment in which the target cable is located is not higher than the material limit dose, the target cable will be rejected.

[0120] In addition, after the detection cables are determined, there may be multiple detection cables with the same material. In this case, aging test may not be performed on all the multiple detection cables with the same material, but only the detection cable with the worst condition may be tested, that is, the detection cable with the highest ambient temperature or the highest accumulated radiation dose in the environment over 60 years. In addition, after the detection cables are determined, there may be multiple detection cables with the same (very close) ambient temperature or the same (very close) accumulated radiation dose in the environment over 60 years. In this case, aging test may not be performed on all the cable materials, but only the material with the worst condition may be tested.

[0121] Specifically, Figure 3 A schematic diagram of a process for screening and determining a detection cable according to an embodiment of the present application is shown. Figure 3 As shown, the method for screening and determining the detection cable may include the following steps:

[0122] Step S301, obtaining a target cable; go to step S301;

[0123] Step S302, identifying the operating environment of the target cable; go to step S302;

[0124] Step S303, determining whether the target cable meets the first aging detection criterion; if so, proceeding to step S307; if not, proceeding to step S304;

[0125] Step S304, determine the material of the target cable; go to step S305;

[0126] Step S305, determining whether the target cable meets the second aging detection criteria; if so, proceeding to step S307; if not, proceeding to step S306;

[0127] Step S306, determining whether the target cable meets the third aging detection criterion; if so, proceeding to step S307; if not, proceeding to step S308;

[0128] Step S307, determining the target cable as a detection cable;

[0129] Step S308, removing the target cable.

[0130] In some embodiments of the present application, in the above method, identifying the operating environment of the target cable includes: identifying the operating area conditions of the target cable; determining the environmental monitoring parameters of the target cable; querying the operating record file of the target cable; troubleshooting unexpected service conditions of the target cable; and determining the operating environment of the target cable based on the operating area conditions, environmental monitoring parameters, operating record files, and unexpected service conditions.

[0131] Identifying the operating environment of the target cable may include, but is not limited to: identifying operating area conditions, determining environmental monitoring parameters, querying operating record files, troubleshooting unexpected service conditions, etc.

[0132] Identifying the operating area conditions can be done by visual inspection or thermal imaging inspection. Visual inspection can include: significant spillage or spray of chemical solutions, oil or fuel, soreness or stinging in the eyes, abnormal odors, abnormally high temperatures, abnormally high radiation doses, abnormal sounds, puddles, leaks or condensation, deterioration of paint on the wall or structure surface, high-intensity vibration of equipment or structure, etc. Thermal imaging inspection can be used to open the casing of electrical equipment for inspection after the cable is powered on.

[0133] The environmental monitoring parameters may include, but are not limited to, temperature parameters, radiation dose parameters, humidity parameters, and pollutant parameters. The temperature parameters and radiation dose parameters of cables in all accessible areas may be measured during operation, or the humidity parameters and pollutant parameters of cables in all accessible areas may be measured during shutdown. For cables in inaccessible areas during operation or shutdown, their environmental monitoring parameters may be determined by calculation and analysis.

[0134] The operation record files that can be queried include but are not limited to: final safety analysis report, electrical and instrumentation system design specifications, electrical and instrumentation equipment identification outline and manual, research reactor system description documents, radiation protection technical specifications and records (hazardous radiation protection survey), monitoring records of specific / monitored areas, environmental status reports, etc.

[0135] Unexpected service conditions may include, but are not limited to, environmental conditions resulting from improper installation or maintenance of the cable, or "collateral damage" caused by personnel passing through an area.

[0136] Through the above-mentioned operating area conditions, environmental monitoring parameters, operating record files and unexpected service conditions, the operating environment of the target cable is determined, and then it is determined whether there is a hot spot area in the target cable.

[0137] In some embodiments of the present application, in the above method, step S140, performing aging detection on the detection cable, includes: detecting the insulation reduction aging effect and the connection impedance increase aging effect of the detection cable.

[0138] For the detection cables that need to be tested for aging, corresponding aging tests can be performed according to the different functions they perform. The contents of the aging test may include, but are not limited to: insulation reduction aging effect and connection impedance increase aging effect.

[0139] For example, when testing the insulation reduction aging effect of the detection cable, the detection cable can be divided into the detection cable in the accessible area and the detection cable in the inaccessible area, and the insulation reduction aging effect of the insulation material of the detection cable (which may include heat shrink tape, sleeve, insulation shell, etc.) is mainly tested. For the detection cable in the inaccessible area, the following methods can be used for testing, but are not limited to: dielectric loss (loss factor or functional factor) measurement, AC withstand voltage measurement, partial discharge detection, step voltage measurement, time domain reflection measurement, insulation resistance measurement, polarization index measurement, linear resonance analysis, etc. For the detection cable in the accessible area, in addition to the above-mentioned methods, visual inspection can also be used to observe whether there are signs of embrittlement, discoloration, cracking, melting, swelling or contamination on the surface. For example, for metal armored busbars, the insulation support can be visually inspected to see if there are signs of surface cracking, crazing, scratches, dimensional changes (such as bulging or shrinking), discoloration, hardening, strength loss, etc.; the inner surface can be visually inspected to see if there are signs of cracking, corrosion, foreign matter, excessive dust accumulation, moisture intrusion, etc.; the material can be visually inspected to see if there are signs of embrittlement, cracking, peeling, melting, discoloration, swelling, contamination, etc.

[0140] For another example, when detecting the aging effect of the connection impedance increase of the detection cable, the connection impedance increase of the metal parts of the detection cable can be directly detected by using a micro-ohmmeter to measure the connection impedance. The temperature can also be measured by an infrared thermal imager to measure the operating temperature of the metal parts of the detection cable, thereby detecting the aging effect of the connection impedance increase of the metal parts of the detection cable.

[0141] For another example, for the instrumentation and control cable system (such as radiation monitoring system, nuclear instrument circuit), the insulation of the detection cable reduces the aging effect and the connection impedance increases the aging effect. A systematic functional test method can be used to detect whether the cable system is aged.

[0142] The above examples are merely intended to exemplify some possible means for detecting the aging effect of reducing the insulation of the detection cable and the aging effect of increasing the connection impedance, but are not limited thereto.

[0143] This application adopts a process-based method for cable aging management object screening, aging effect identification and aging effect detection of research reactors, which solves the aging management problem of safety-critical cables of research reactors during the operation stage and can systematically evaluate the aging status of cables in research reactors.

[0144] Figure 4 The structure diagram of a cable aging detection device for a research reactor proposed in one embodiment of the present application is shown. Figure 4 As shown, the device 400 includes:

[0145] The target electrical instrument equipment determination unit 410 is used to screen and determine the target electrical instrument equipment from the candidate electrical instrument equipment of the electrical instrument system of the research reactor based on a preset screening criterion;

[0146] A target cable determination unit 420 is used to select and determine a target cable from candidate cables of a target electrical instrument device based on a preset function execution criterion;

[0147] A detection cable determination unit 430 is used to screen and determine the detection cable from the target cables based on a preset aging detection criterion;

[0148] The detection unit 440 is used to perform aging detection on the detection cable.

[0149] In some embodiments of the present application, in the above-mentioned device 400, the electrical instrument system includes: a power supply system, an instrument control system, a lighting system, a radiation monitoring system and a communication system; the optional cables include: electrical cabinet busbar cables, low-voltage power cables and connectors, high-voltage power cables and connectors, instrumentation and control circuit cables and connectors.

[0150] In some embodiments of the present application, in the above-mentioned device 400, the preset screening criteria include: a first screening criterion, failure of the electrical and instrument equipment directly leads to loss or damage of the shutdown function, residual heat extraction function or radioactive material containment function of the research reactor; a second screening criterion, the electrical and instrument equipment is related to the function of flooding warning or mitigation of flooding consequences of the research reactor; a third screening criterion, the electrical and instrument equipment is related to the function of restoring power failure when a power failure occurs in the research reactor; a target electrical and instrument equipment determination unit 410 is specifically used to: determine whether the alternative electrical and instrument equipment meets the first screening criterion; when the alternative electrical and instrument equipment meets the third screening criterion, When the alternative electrical instrument equipment meets the first screening criterion, the alternative electrical instrument equipment is determined as the target electrical instrument equipment; when the alternative electrical instrument equipment does not meet the first screening criterion, it is determined whether the alternative electrical instrument equipment meets the second screening criterion; when the alternative electrical instrument equipment meets the second screening criterion, the alternative equipment is determined as the target electrical instrument equipment; when the alternative electrical instrument equipment does not meet the second screening criterion, the alternative equipment is eliminated; it is determined whether the alternative electrical instrument equipment meets the third screening criterion; when the alternative electrical instrument equipment meets the third screening criterion, the alternative electrical instrument equipment is determined as the target electrical instrument equipment; when the alternative electrical instrument equipment does not meet the third screening criterion, the alternative equipment is eliminated.

[0151] In some embodiments of the present application, in the above-mentioned device 400, the preset function execution criteria include: a first function execution criterion, the cable performs the function of output voltage, output current or output signal; a second function execution criterion, the cable performs the insulation function; a target cable determination unit 420, specifically used to: when the alternative cable meets the first function execution criterion or the second function execution criterion, determine the alternative cable as the target cable.

[0152] In some embodiments of the present application, in the above-mentioned device 400, the preset aging detection criteria include: a first aging detection criterion, there is a hot spot area in the cable; a second aging detection criterion, the ambient temperature of the cable is higher than the material limit temperature; a third aging detection criterion, the 60-year accumulated radiation dose of the environment in which the cable is located is higher than the material limit dose; a detection cable determination unit 430 is specifically used to: identify the operating environment of the target cable; determine whether the target cable meets the first aging detection criterion according to the operating environment of the target cable; when the target cable meets the first aging detection criterion, determine the target cable as a detection cable; when the target cable does not meet the first aging detection criterion, determine the material of the target cable; according to the material of the target cable, determine the target cable that meets the second aging detection criterion or the third aging detection criterion as a detection cable.

[0153] In some embodiments of the present application, in the above-mentioned device 400, the cable detection determination unit 430 is also specifically used to: identify the operating area conditions of the target cable; determine the environmental monitoring parameters of the target cable; query the operating record file of the target cable; check for unexpected service conditions of the target cable; and determine the operating environment of the target cable based on the operating area conditions, environmental monitoring parameters, operating record files and unexpected service conditions.

[0154] In some embodiments of the present application, in the above-mentioned device 400, the detection unit 440 is specifically used to detect the insulation reduction aging effect and the connection impedance increase aging effect of the detection cable.

[0155] It should be noted that the above-mentioned cable aging detection device 400 for a research reactor can implement the above-mentioned cable aging detection method for a research reactor one by one, which will not be described in detail.

[0156] Figure 5 A schematic diagram showing the structure of a computer device according to an embodiment of the present application is shown. Figure 5As shown, the internal structure of the computer device may include a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile and / or volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external client through a network connection. When the computer program is executed by the processor, the functions or steps of the cable aging detection method for the research reactor are realized.

[0157] In one embodiment, the computer device provided by the present application includes a memory and a processor, the memory stores a database and a computer program that can be run on the processor, and the processor implements the following steps when executing the computer program:

[0158] Based on the preset screening criteria, select and determine the target electrical and instrument equipment from the candidate electrical and instrument equipment of the electrical and instrument system of the research reactor;

[0159] Based on the preset function execution criteria, select and determine the target cable from the candidate cables of the target electrical and instrumentation equipment;

[0160] Based on the preset aging detection criteria, the detection cable is selected from the target cables;

[0161] Perform aging test on the detection cable.

[0162] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0163] Based on the preset screening criteria, select and determine the target electrical and instrument equipment from the candidate electrical and instrument equipment of the electrical and instrument system of the research reactor;

[0164] Based on the preset function execution criteria, select and determine the target cable from the candidate cables of the target electrical and instrumentation equipment;

[0165] Based on the preset aging detection criteria, the detection cable is selected from the target cables;

[0166] Perform aging test on the detection cable.

[0167] It should be noted that the above functions or steps that can be implemented by the computer device or computer-readable storage medium can refer to the relevant description in the aforementioned method embodiment. To avoid repetition, they will not be described one by one here.

[0168] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0169] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0170] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A cable aging detection method for a research reactor, characterized in that: The method comprises: Based on the preset screening criteria, select and determine the target electrical and instrument equipment from the candidate electrical and instrument equipment of the electrical and instrument system of the research reactor; Based on a preset function execution criterion, screening and determining a target cable from candidate cables of the target electrical and instrumentation equipment; Based on a preset aging detection criterion, screening and determining a detection cable from the target cables; An aging test is performed on the detection cable.

2. The cable aging detection method for a research reactor according to claim 1, characterized in that: The electrical instrument system comprises: Power systems, instrumentation and control systems, lighting systems, radiation monitoring systems, and communication systems; The alternative cable includes: Electrical cabinet busbar cables, low-voltage power cables and connectors, high-voltage power cables and connectors, instrumentation and control circuit cables and connectors.

3. The cable aging detection method for a research reactor according to claim 1, characterized in that: The preset screening criteria include: The first screening criterion is that the failure of the electrical and instrumentation equipment directly leads to the loss or damage of the shutdown function, residual heat removal function or radioactive material containment function of the research reactor; The second screening criterion is that the electrical equipment is related to the function of warning of flooding or mitigating the consequences of flooding of the research reactor; The third screening criterion is that the electrical instrument equipment is related to the function of restoring power failure when a power failure occurs in the research reactor; The step of screening and determining target electrical and instrument equipment from candidate electrical and instrument equipment of the electrical and instrument system of the research reactor based on a preset screening criterion includes: Determining whether the candidate electrical instrument equipment meets the first screening criteria; If the candidate electrical equipment meets the first screening criteria, the candidate electrical equipment is determined as the target electrical equipment; if the candidate electrical equipment does not meet the first screening criteria, it is determined whether the candidate electrical equipment meets the second screening criteria; if the candidate electrical equipment meets the second screening criteria, the candidate equipment is determined as the target electrical equipment; if the candidate electrical equipment does not meet the second screening criteria, the candidate equipment is eliminated; Determining whether the candidate electrical instrument equipment meets the third screening criterion; If the candidate electrical equipment meets the third screening criterion, the candidate electrical equipment is determined as the target electrical equipment; if the candidate electrical equipment does not meet the third screening criterion, the candidate equipment is eliminated.

4. The cable aging detection method for a research reactor according to claim 1, characterized in that: The preset function execution criteria include: The first function execution criterion is that the cable performs the function of output voltage, output current or output signal; A second function performance criterion, the cable performs an insulation function; The step of screening and determining the target cable from the candidate cables of the target electrical equipment based on the preset function execution criteria includes: If the candidate cable meets the first function execution criterion or the second function execution criterion, the candidate cable is determined as the target cable.

5. The cable aging detection method for a research reactor according to claim 1, characterized in that: The preset aging detection criteria include: The first aging test criterion is that the cable has hot spots; The second aging detection criterion is that the ambient temperature of the cable is higher than the material limit temperature; The third aging test criterion is that the 60-year cumulative radiation dose of the environment in which the cable is located is higher than the material limit dose; The step of screening and determining the detection cable from the target cables based on the preset aging detection criteria includes: Identifying an operating environment of the target cable; Determining whether the target cable meets the first aging detection criterion according to the operating environment of the target cable; If the target cable meets the first aging detection criterion, determining the target cable as the detection cable; If the target cable does not meet the first aging detection criterion, determining the material of the target cable; According to the material of the target cable, the target cable that meets the second aging detection criterion or the third aging detection criterion is determined as the detection cable.

6. The cable aging detection method for a research reactor according to claim 5, characterized in that: The identifying the operating environment of the target cable includes: Identifying operating area conditions of the target cable; Determining environmental monitoring parameters of the target cable; Querying the operation record file of the target cable; Checking for unexpected service conditions of the target cable; The operating environment of the target cable is determined according to the operating area conditions, the environmental monitoring parameters, the operating record file, and the unexpected service conditions.

7. The cable aging detection method for a research reactor according to claim 1, characterized in that: The aging detection of the detection cable comprises: The insulation reduction aging effect and the connection impedance increase aging effect of the detection cable are detected.

8. A cable aging detection device for a research reactor, characterized in that: The device comprises: A target electrical instrument equipment determination unit is used to screen and determine the target electrical instrument equipment from candidate electrical instrument equipment of the electrical instrument system of the research reactor based on a preset screening criterion; A target cable determination unit, configured to screen and determine a target cable from candidate cables of the target electrical equipment based on a preset function execution criterion; A detection cable determination unit, used for screening and determining a detection cable from the target cables based on a preset aging detection criterion; The detection unit is used to perform aging detection on the detection cable.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the cable aging detection method for a research reactor according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is instructed by a processor, the computer program implements the steps of the cable aging detection method for a research reactor according to any one of claims 1 to 7.

Images