Method and System for Monitoring Sump in RPE System of Nuclear Power Plant

Abstract

The present application discloses a method and system for monitoring a sump in a nuclear power plant RPE system. First, sump monitoring data is obtained in real time, then sump drainage data is obtained based on the sump monitoring data, and when the sump drainage data is greater than a preset threshold, a sump warning message is issued. Among them, the sump monitoring data includes sump ID information, liquid source information, and sump liquid level height information, the liquid source information includes the water injection valve information for injecting liquid into the sump, and the sump warning message includes sump ID information, liquid storage volume, and water injection valve information. When an abnormality occurs in the sump liquid storage, a warning message is issued in a timely manner. Since the warning message includes the sump location information and the water injection valve information, the risk points can be marked in advance, thereby improving the on-site work efficiency and greatly reducing the radiation dose during on-site construction.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant safety operation, and particularly relates to a method and system for monitoring a sump in a nuclear power plant RPE system. Background Art

[0002] In the radioactive control area of a nuclear power plant building, there are items such as pipelines, equipment, valves, and instruments of radioactive systems. Whether it is flange gap leakage, safety valve actuation, system drainage, etc., a large amount of radioactive hydrophobic water will be generated. This part of the radioactive hydrophobic water enters the radioactive waste drainage system through floor drains. The main function of the RPE system (nuclear island exhaust and hydrophobic system) is to monitor leaks, selectively recover and intermediate store all radioactive and non-radioactive wastes under normal operating conditions; under abnormal operating conditions, it can allow the storage and delay the treatment of highly radioactive media. Different types of wastewater are collected according to their properties for subsequent optimized treatment. Please refer to Figure 1 , which is a schematic diagram of hydrophobic storage in the RPE system of a nuclear power plant, including multiple sumps and storage tanks. The sumps of the RPE system are mainly located in the reactor building, fuel building, safety building, auxiliary building, wastewater treatment building, etc. Since the water stored in the sumps can directly or indirectly reflect the safety status of the nuclear power plant, it is necessary to obtain the status of hydrophobic storage in each sump in real time, so as to transfer hydrophobic water between sumps in a timely manner as needed. At present, the status of hydrophobic storage in the sumps can be monitored by the sump liquid level alarm of the main control DCS. When the sump liquid level is high, an alarm will occur and the RPE sump pump will be automatically started. If system maintenance operations are performed or equipment is put into operation for water filling and air exhausting after the maintenance work is completed, it will be sorted out through the system flow chart, and each hydrophobic point and exhaust point will correspond to the RPE sump. However, sorting out the water management of each sump according to the system flow chart requires a lot of time, so the efficiency is low, which is not conducive to the safe operation of the nuclear power plant. For example, after the main control panel patrol finds that the sump liquid level has risen abnormally, on-site personnel are arranged to check for leaks. Since there are many interfaces in the RPE system and there is no existing leak-checking document, it takes a lot of time for the main control and on-site personnel to sort out the interfaces between the RPE and each system, which is not conducive to the main control to carry out abnormal work of the unit, and at the same time will distract the main control personnel from monitoring the unit. In most cases, on-site personnel will carry the system flow chart and a preset inspection procedure to the site to check for leaks. Since the valve room distribution on the preset inspection procedure is irregular, that is, during the leak-checking period, the valves in the same floor room may be scattered at different positions on the preset inspection procedure, there may be a situation where on-site personnel may run back and forth in this floor area. If the room is in the orange area, on-site personnel have to return to the isolation office to reapply for an orange area permit, which is not conducive to the development of on-site leak-checking work, and at the same time will affect the efficiency and quality of on-site personnel performing leak-checking. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is that there are still defects in the existing sump hydrophobic management for nuclear power plants.

[0004] In a first aspect, in one embodiment, a method for monitoring a sump in a nuclear power plant RPE system is provided, including:

[0005] Obtain sump monitoring data in real time; the sump monitoring data includes the unique sump ID information, liquid source information, and sump liquid level height information of each sump; the sump ID information of the sump corresponds to the sump location information, liquid storage volume, maximum liquid storage speed, and maximum liquid drainage speed of the sump; the liquid source information includes the water injection valve information for injecting liquid into the sump.

[0006] Obtain sump drainage data based on the sump monitoring data; the sump drainage data includes the liquid storage amount and the liquid volume change rate.

[0007] When the sump drainage data is greater than a preset threshold, send a sump warning message; the sump warning message includes the sump ID information, the sump location information, the liquid storage volume, and the water injection valve information.

[0008] In one embodiment, the water injection valve information includes the unique valve ID information of each water injection valve; the valve ID information of the water injection valve corresponds to the valve location information, valve opening, valve flow rate, upstream information, and / or liquid hazard information of the water injection valve; the valve location information includes the isolation area and the non-isolation area; the liquid hazard information is used to represent the radiation hazard degree of the waste liquid, and the upstream information is used to represent the source of the waste liquid.

[0009] In one embodiment, when the sump drainage data is greater than a preset threshold, sending a sump warning message includes:

[0010] When the difference value between the current liquid volume change rate and the historical volume change rate is greater than a preset first threshold, send a sump warning message;

[0011] The sump warning message includes the sump ID information and the sump location information corresponding to the sump ID information;

[0012] The sump warning message further includes the valve ID information of the water injection valve and the valve location information, upstream information, and / or liquid hazard information corresponding to the valve ID information.

[0013] In one embodiment, the sump monitoring data further includes the temperature value of the stored liquid in the sump; the sump drainage data further includes the growth rate of the temperature value of the stored liquid in the sump.

[0014] In one embodiment, the historical volume change rate is obtained by statistically analyzing the historical liquid volume change rate under the current operating conditions of the nuclear power plant.

[0015] In one embodiment, the historical capacity change rate is obtained by statistically calculating the liquid capacity change rate during the same time period in the history of the nuclear power plant.

[0016] In one embodiment, when the sump drain data is greater than a preset threshold, a sump warning message is issued, including:

[0017] When the liquid storage volume is greater than a preset second threshold, a sump warning message is issued.

[0018] In one embodiment, the sump monitoring method further includes:

[0019] According to the sump monitoring data of each sump, the sump ID information of the sump with a liquid storage volume greater than a preset first free capacity is output, so as to be used as the sump for liquid transfer.

[0020] In a second aspect, in one embodiment, a sump monitoring system for a nuclear power plant RPE system is provided, including a sump monitoring device and a server;

[0021] The sump monitoring device is used to obtain sump monitoring data in real time and send it to the server; the sump monitoring data includes the sump ID information unique to each sump, liquid source information, and sump liquid level height information; the sump ID information of the sump corresponds to the sump location information, liquid storage volume, maximum liquid storage speed, and maximum liquid drainage speed of the sump; the liquid source information includes the water injection valve information for injecting liquid into the sump;

[0022] The server is used to obtain sump drain data according to the sump monitoring data, and when the sump drain data is greater than a preset threshold, a sump warning message is issued; the sump warning message includes the sump ID information, the liquid storage volume, and the water injection valve information.

[0023] In one embodiment, the sump monitoring system further includes a display terminal for displaying the sump warning message; the display terminal includes an intelligent mobile terminal.

[0024] In a third aspect, in one embodiment, a computer-readable storage medium is provided, on which a program is stored, and the program can be executed by a processor to implement the file search method described in the first aspect or the second aspect.

[0025] A sump monitoring system according to the above embodiment includes a sump monitoring device and a server. The sump monitoring device is used to obtain sump monitoring data in real time and send it to the server. The server is used to obtain sump hydrophobic data based on the sump monitoring data, and when the sump hydrophobic data is greater than a preset threshold, send out a sump warning message. Among them, the sump warning message includes sump ID information, liquid storage volume, and water injection valve information. Since the sump liquid storage is monitored by the sump monitoring system, when an abnormality occurs, a warning message is sent in time, which reduces the time for the main control personnel to search for the flow chart in case of an emergency or normal working conditions. Since the warning message includes sump location information and water injection valve information, the risk points are marked in advance, thereby improving the reliability of on-site execution documents, improving on-site work efficiency, and greatly reducing the radiation dose during on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of hydrophobic storage in the RPE system of a nuclear power plant;

[0027] Figure 2 It is a schematic flow chart of a sump monitoring method in an embodiment;

[0028] Figure 3 It is a schematic structural diagram of a sump monitoring system in another embodiment;

[0029] Figure 4 It is a schematic diagram of sump monitoring data in an embodiment;

[0030] Figure 5 It is a schematic diagram of a sump hydrophobic data query interface in an embodiment;

[0031] Figure 6 It is a schematic diagram of a sump hydrophobic data display interface in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many details are described to make the present application better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid the core part of the present application being overwhelmed by excessive description. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0033] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0034] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0035] The main reasons for the abnormal rise in RPE pit liquid level are divided into two situations:

[0036] 1) Equipment failure, such as valve leakage causing abnormal rise in pit liquid level. On-site personnel can use the valve downstream window to see whether there is fluid and the temperature difference between upstream and downstream of the pipeline to help determine whether the abnormal pit liquid level is caused by valve leakage;

[0037] 2) After operation (releasing isolation, filling with water and exhausting air), although the valve is closed, a small amount of fluid will still flow from the valve to the RPE pit due to other particles attached to the valve sealing surface. Under the authorization of the main control personnel, the on-site personnel can flush the sealing surface by opening and closing the valve multiple times so that the valve can be truly closed.

[0038] There are many possible reasons for the abnormal increase in the pit level. Therefore, the most comprehensive data needs to be provided when preparing the initial raw leak detection data. After combining the actual on-site leak detection work and consultations with different positions, an RPE leak detection document template is developed, which mainly includes the basic information of the RPE pit pump, the main source of waste liquid, leak detection ideas, and which valves may cause abnormal pit level due to internal leakage, the location of the valve and the downstream window room, whether they are in the same room, the red and orange zone, etc. In order to facilitate the leak detection work, the leak detection valves are arranged according to the actual location on site, which can greatly reduce the working time of the on-site personnel. Since the RPE system has many flow charts and interfaces with more than 40 systems, the purpose of this application is to save the time of the main control and on-site query flow chart when the pit level is too high, the relevant drainage and exhaust work is performed, and the corresponding pit work downstream of the valve needs to be queried in an emergency, so as to avoid repeated on-site visits, identify risk points in advance, thereby improving on-site work efficiency and reducing the radiation dose of on-site personnel.

[0039] In an embodiment of the present invention, a method and a system for monitoring a sump in a nuclear power plant RPE system are disclosed. First, sump monitoring data is obtained in real time, then sump drainage data is obtained based on the sump monitoring data, and then when the sump drainage data is greater than a preset threshold, a sump warning message is issued. Among them, the sump monitoring data includes sump ID information, liquid source information, and sump liquid level height information. The liquid source information includes the water injection valve information for injecting liquid into the sump. The sump warning message includes sump ID information, liquid storage volume, and water injection valve information. When abnormal liquid storage occurs in the sump, a warning message is issued in a timely manner. Since the warning message includes sump location information and water injection valve information, the risk points are marked in advance, thereby improving the on-site work efficiency and greatly reducing the radiation dose during on-site construction.

[0040] Embodiment 1

[0041] Please refer to Figure 2 , which is a schematic flow chart of a sump monitoring method in an embodiment, including:

[0042] Step 100, obtain sump monitoring data.

[0043] Obtain sump monitoring data in real time. The sump monitoring data includes the unique sump ID information, liquid source information, and sump liquid level height information of each sump. The sump ID information of the sump corresponds to the sump location information, liquid storage volume, maximum liquid storage rate, and maximum liquid drainage rate of the sump. Among them, the liquid source information includes the water injection valve information for injecting liquid into the sump. The maximum liquid storage rate is the theoretically maximum liquid storage growth rate of the sump, and the maximum liquid drainage rate is the theoretically maximum liquid drainage rate of the sump. In one embodiment, the sump monitoring data further includes the temperature value of the stored liquid.

[0044] Step 200, obtain sump drainage data.

[0045] Obtain sump drainage data based on the sump monitoring data. The sump drainage data includes the liquid storage amount and the liquid volume change rate. In one embodiment, the sump drainage data further includes the temperature value growth rate of the liquid stored in the sump.

[0046] Step 300, issue a sump warning message.

[0047] When the sump hydrophobic data is greater than a preset threshold, a sump warning message is issued. The sump warning message includes sump ID information, sump location information, liquid storage volume, and water injection valve information. In one embodiment, the water injection valve information includes the unique valve ID information of each water injection valve, and the valve ID information of the water injection valve corresponds to the valve position information, valve opening, valve flow rate, upstream information, and / or liquid hazard level information of the water injection valve. Among them, the valve position information includes information on whether the valve position is in the nuclear power plant isolation area and the non-isolation area of the nuclear power plant. The liquid hazard level information is used to represent the radiation hazard level of the waste liquid, and the upstream information is used to represent the source of the waste liquid.

[0048] In one embodiment, when the difference value between the current liquid volume change rate and the historical volume change rate is greater than a preset first threshold, a sump warning message is issued. Among them, the sump warning message includes sump ID information and the sump location information corresponding to the sump ID information. The sump warning message also includes the valve ID information of the water injection valve and the valve position information, upstream information, and / or liquid hazard level information corresponding to the valve ID information.

[0049] In one embodiment, the historical volume change rate is obtained by statistically analyzing the historical liquid volume change rate under the current operating conditions of the nuclear power plant. In one embodiment, the historical volume change rate is obtained by statistically analyzing the liquid volume change rate in the same time period in the history of the nuclear power plant.

[0050] In one embodiment, when the liquid storage amount in the sump is greater than a preset second threshold, a sump warning message is issued.

[0051] In one embodiment, when the growth rate of the temperature value of the liquid stored in the sump is greater than a preset third threshold, a sump warning message is issued. Among them, the sump warning message also includes the growth rate of the temperature value of the liquid stored in the sump.

[0052] In one embodiment, when the temperature value of the liquid stored in the sump is greater than a preset fourth threshold, a sump warning message is issued. Among them, the sump warning message also includes the temperature value of the liquid stored in the sump.

[0053] In one embodiment, the sump monitoring method further includes:

[0054] According to the sump monitoring data of each sump, the sump ID information of the sump with a liquid storage capacity greater than a preset first free capacity is output for use as the sump for liquid transfer. When the current sump is about to be full, the sump with a liquid storage capacity greater than the first free capacity obtained is used as the transfer sump.

[0055] In the sump monitoring method disclosed in the embodiments of the present application, first, sump monitoring data is obtained in real time, then sump drainage data is obtained based on the sump monitoring data, and when the sump drainage data is greater than a preset threshold, a sump warning message is issued. Among them, the sump monitoring data includes sump ID information, liquid source information, and sump liquid level height information. The liquid source information includes the water injection valve information for injecting liquid into the sump. The sump warning message includes sump ID information, liquid storage volume, and water injection valve information. When abnormal liquid storage occurs in the sump, a warning message is issued in a timely manner. Since the warning message includes sump location information and water injection valve information, risk points can be identified in advance, thereby improving the on-site work efficiency and greatly reducing the radiation dose during on-site construction.

[0056] Embodiment 2

[0057] Please refer to Figure 3 , which is a schematic structural diagram of a sump monitoring system in another embodiment. The sump monitoring system is used for the RPE system of a nuclear power plant and includes a sump monitoring device 10 and a server 20. The sump monitoring device 10 is used to obtain sump monitoring data in real time and send it to the server 20. The sump monitoring data includes unique sump ID information, liquid source information, and sump liquid level height information for each sump. The sump ID information of the sump corresponds to the sump location information, liquid storage volume, maximum liquid storage speed, and maximum liquid drainage speed of the sump. The liquid source information includes the water injection valve information for injecting liquid into the sump. The server 20 is used to obtain sump drainage data based on the sump monitoring data and issue a sump warning message when the sump drainage data is greater than a preset threshold. The sump warning message includes sump ID information, liquid storage volume, and water injection valve information. In one embodiment, the sump monitoring system further includes a display terminal 30 for displaying the sump warning message. In one embodiment, the display terminal 30 includes a smart mobile terminal. In one embodiment, the server 20 is a cloud server.

[0058] In the sump monitoring system disclosed in the embodiments of the present application, it includes a sump monitoring device and a server. The sump monitoring device is used to obtain sump monitoring data in real time and send it to the server. The server is used to obtain sump drainage data based on the sump monitoring data and issue a sump warning message when the sump drainage data is greater than a preset threshold. Among them, the sump warning message includes sump ID information, liquid storage volume, and water injection valve information. Since the sump liquid storage is monitored through the sump monitoring system and a warning message is issued in a timely manner when an abnormality occurs, the time for the main control personnel to search for the flow chart is reduced in case of an emergency or normal working conditions. Since the warning message includes sump location information and water injection valve information, risk points can be identified in advance, thereby improving the reliability of on-site execution documents, improving on-site work efficiency, and greatly reducing the radiation dose during on-site construction.

[0059] Please refer to Figure 4, which is a schematic diagram of the pit monitoring data in an embodiment. The pit monitoring data includes the valve ID information of the water injection valve, the valve position information corresponding to the water injection valve, and the valve type information. The valve position information includes whether it is in the orange or red area.

[0060] Please refer to Figure 5 , which is a schematic diagram of the pit drain data query interface in an embodiment. Enter the pit ID information for query.

[0061] Please refer to Figure 6 , which is a schematic diagram of the pit drain data display interface in an embodiment. The pit drain data can be obtained based on the pit ID information.

[0062] In the pit monitoring method disclosed in the embodiments of the present application, during the major overhaul or daily operation of the unit, when abnormal water inflow occurs in the RPE pit, the main control operator can use the pit monitoring method to assist in quickly responding to leak detection, reducing the time to query the system flow chart, so as to better monitor the unit. The location of the valves on the query route is comprehensively sorted according to information such as the on-site plant layout and the orange area. The purpose is to improve the usability of the document, prevent on-site personnel from taking unnecessary detours, reduce the radiation dose of on-site personnel, and thus improve the quality and efficiency of on-site work. In addition, the pit monitoring method can also assist the personnel writing the leak detection document in document writing.

[0063] The following takes an actual event as an example to describe the application of the technical solution disclosed in this application.

[0064] One day, the main control estimated the primary loop leakage rate from 03:10 to 05:11. The primary loop leakage rate considering uncertainty was 200 L / h. The RO found an inflection point in the slope of the level curve of the volume control tank. Further calculation showed that the leakage rate considering uncertainty from 03:10 to 04:30 was 51.5 L / h, while the leakage rate considering uncertainty from 04:30 to 05:11 reached 488 L / h. In the NS / RIS-RHR mode, when the non-quantitative leakage rate is greater than 230 L / h, it is the first group I0 of the RCP. During the unit state transition, the first group I0 cannot exist. The main control operator inquired and found that the rising trend of the liquid level of 2RPE1862BA was significantly accelerated. Then, through the RPE two-way correlation flow chart, the possible reasons for the rising liquid level were sorted out. Checking the drawings, it was found that 2RPE1856VP was also connected to 2RPE1862BA. It was recommended to close 2RPE1856VP and then verify that there was no water coming in from this line of 2RPE1856VP. Since the pipelines connected to 2RPE1856VP were all airtight and there was no risk of water leakage, the operating value required the site to close 2RPE1856VP after analysis. After the site closed this valve, the rising rate of the liquid level of 2RPE1862BA was almost 0. It was judged that the leakage originated from the safety valve upstream of 2RPE1856VP. When the on-duty shift sent a site operator to check 2RCV3113VP, the site found that the safety valve was intact, but the temperature of the downstream pipeline was the same as that of the upstream, the pipeline temperature was higher than the room temperature, the closer to the pipeline, the higher the radiation dose rate, and the site could hear the valve throttling sound. It was initially suspected that this safety valve had a leak. After the OTS arrived, to further verify the internal leakage of the valve, there was a reading after connecting the ultrasonic flowmeter, and it was basically determined that this safety valve had a leak. After the OPM personnel knocked on the site, the liquid level of 2RPE1862BA slowed down significantly. After multiple knocks, 2RPE1862BA became relatively flat. The leakage rate was executed again, and the uncertainty was 59.3 L / h. The leakage rate test met the requirements.

[0065] The main purpose of this application is to reduce the time for the main control personnel to search for the flow chart in case of emergency or normal working conditions, improve the reliability of on-site implementation documents, reduce the personnel irradiation dose, and improve work efficiency.

[0066] Those skilled in the art can understand that all or part of the functions of the various methods in the above embodiments can be implemented in a hardware manner or in a computer program manner. When all or part of the functions in the above embodiments are implemented in a computer program manner, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, magnetic disk, optical disk, hard disk, etc. The above functions can be realized by a computer executing the program. For example, the program is stored in the memory of the device, and when the processor executes the program in the memory, the above all or part of the functions can be realized. In addition, when all or part of the functions in the above embodiments are implemented in a computer program manner, the program can also be stored in a storage medium such as a server, another computer, magnetic disk, optical disk, flash drive or mobile hard disk, and saved to the memory of the local device by downloading or copying, or the system of the local device is updated with a version. When the processor executes the program in the memory, all or part of the functions in the above embodiments can be realized.

[0067] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art of the present invention, according to the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A method for monitoring the sumps of a nuclear power plant's RPE system, characterized in that, it includes: Obtaining sump monitoring data in real time; the sump monitoring data includes the unique sump ID information, liquid source information, and sump liquid level height information of each sump; The sump ID information of the sump corresponds to the sump location information, liquid storage volume, maximum liquid storage speed, and maximum liquid drainage speed of the sump; the liquid source information includes the water injection valve information for injecting liquid into the sump; Obtaining sump drainage data based on the sump monitoring data; the sump drainage data includes the liquid storage volume and the liquid volume change rate; When the sump drainage data is greater than a preset threshold, sending a sump warning message; the sump warning message includes the sump ID information, the sump location information, the liquid storage volume, and the water injection valve information; The water injection valve information includes the unique valve ID information of each water injection valve; the valve ID information of the water injection valve corresponds to the valve location information, valve opening, valve flow rate, upstream information, and / or liquid hazard information of the water injection valve; the valve location information includes the isolation area and the non-isolation area; the liquid hazard information is used to represent the radiation hazard degree of the waste liquid, and the upstream information is used to represent the source of the waste liquid; The step of "when the sump drainage data is greater than a preset threshold, sending a sump warning message" includes: When the difference value between the current liquid volume change rate and the historical volume change rate is greater than a preset first threshold, sending a sump warning message; The sump warning message includes the sump ID information and the sump location information corresponding to the sump ID information; The sump warning message further includes the valve ID information of the water injection valve and the valve location information, upstream information, and / or liquid hazard information corresponding to the valve ID information; The historical volume change rate is obtained by statistically analyzing the historical liquid volume change rate under the current operating conditions of the nuclear power plant; and / or, the historical volume change rate is obtained by statistically analyzing the liquid volume change rate in the same time period in the history of the nuclear power plant.

2. The sump monitoring method according to claim 1, characterized in that, the sump monitoring data further includes the temperature value of the stored liquid in the sump; the sump drainage data further includes the temperature value growth rate of the stored liquid in the sump.

3. The sump monitoring method according to claim 1, characterized in that, the step of "when the sump drainage data is greater than a preset threshold, sending a sump warning message" includes: When the liquid storage volume is greater than a preset second threshold, sending a sump warning message.

4. The sump monitoring method according to claim 3, characterized in that, it further includes: Based on the sump monitoring data of each sump, outputting the sump ID information of the sump with a liquid storage volume greater than a preset first free volume, for use as a sump for liquid transfer.

5. A computer-readable storage medium, characterized in that, a program is stored on the medium, and the program can be executed by a processor to implement the method according to any one of claims 1-4.

6. A sump monitoring system for a nuclear power plant's RPE system, characterized in that, For applying the pit monitoring method according to any one of claims 1 to 4, the pit monitoring system includes a pit monitoring device and a server; The pit monitoring device is used to obtain pit monitoring data in real time and send it to the server; the pit monitoring data includes the unique pit ID information, liquid source information, and pit liquid level height information of each pit; the pit ID information of the pit corresponds to the pit location information, liquid storage volume, maximum liquid storage speed, and maximum liquid drainage speed of the pit; the liquid source information includes the water injection valve information for injecting liquid into the pit; The server is used to obtain pit drainage data based on the pit monitoring data, and issue a pit warning message when the pit drainage data is greater than a preset threshold; the pit warning message includes the pit ID information, the liquid storage volume, and the water injection valve information.

7. The pit monitoring system according to claim 6, wherein, it further includes a display terminal for displaying the pit warning message; the display terminal includes an intelligent mobile terminal.

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