An intelligent evaluation device and method for the state of a nuclear power plant safety system

Abstract

The present invention relates to the field of nuclear power, and in particular to an intelligent nuclear power plant safety system status evaluation device and method. The device comprises: a data acquisition module for real-time acquisition, processing and storage of various data of power plant simulators and nuclear power units; a business logic service module for performing logical operations based on the acquired data, linking the acquired data with the equipment status, and performing safety system status evaluation; and a front-end display module for displaying the system status transmitted by the business logic service module and realizing human-computer interaction. The method comprises: data acquisition; business logic service for hierarchical evaluation of the safety system status; and visual display of the evaluation results. The present invention is suitable for rapid evaluation of the system safety status in the event of a nuclear power plant accident, improving the level of automation and the scientific nature of the evaluation.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power, and in particular to an intelligent nuclear power plant safety system status evaluation device and method. Background Art

[0002] During nuclear power plant accident management, to address initiating events and superimposed events caused by internal or external factors, accident handling procedures for design basis accidents and severe accident management guidelines for design extension conditions are often required. In the event of a nuclear power plant accident, it is crucial to quickly evaluate the status of the plant's safety systems to provide support to emergency command decision-makers. Previously, existing methods for determining the status of safety systems generally relied on operator experience and the availability of relevant safety system equipment. The accuracy of this determination depended on the operator's own experience. Furthermore, the unavailability of certain safety system equipment did not result in the failure of the entire safety system. Relying solely on experience was prone to inaccurate judgments of safety system status due to human error. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an intelligent nuclear power plant safety system status evaluation device and method, which is suitable for rapid evaluation of the system safety status in the event of a nuclear power plant accident.

[0004] The present invention provides an intelligent nuclear power plant safety system status evaluation device, comprising:

[0005] Data acquisition module, used for real-time acquisition, processing and storage of various data from power plant simulators and nuclear power units;

[0006] The business logic service module performs logical operations based on the collected data, links the collected data with the equipment status, and evaluates the safety system status;

[0007] The safety system status is classified according to the consequences of path failure. The specific classification method is:

[0008] The state in which the safety function can be completed normally is regarded as normal;

[0009] Partial degradation occurs when some equipment or safety system functions are affected, but more than 80% of safety functions can still be completed.

[0010] Most equipment or safety system functions are affected, but 20% or less of the safety functions can still be completed, which corresponds to severe degradation;

[0011] The state of being completely unusable and unable to complete the safety function corresponds to failure;

[0012] The front-end display module displays the system status transmitted by the business logic service module and realizes human-computer interaction.

[0013] In a specific embodiment of the present invention, the real-time data of the data collection is stored in an emergency database, and the emergency database adopts a time series database IOTDB.

[0014] In a specific embodiment of the present invention, the business logic service module includes a logic operation module and a storage module;

[0015] The logic operation module receives the data transmitted by the data acquisition module, performs operations and determines the status of the security system according to the data, and performs corresponding classification according to different statuses;

[0016] The storage module receives and stores the result of the system status evaluation.

[0017] In a specific embodiment of the present invention, the front-end display module includes a control module and a visualization module;

[0018] The control module is used for human-computer interaction, and the input data is manually modified through the control module to avoid system status judgment errors caused by unreliable data acquisition;

[0019] The data input by the control module is fed back to the business logic service module to re-judge the system status.

[0020] In a specific embodiment of the present invention, when the data acquisition module collects data from the simulator, it reads the data files sent by the simulator at a fixed frequency according to the configured power plant operation data and process data points, parses the files, and stores them in the emergency database.

[0021] In a specific embodiment of the present invention, the nuclear power unit data and simulator data collected by the data collection module can be switched at will.

[0022] In a specific embodiment of the present invention, the logical operations in the business logic service module are designed as follows: the top level is to complete the safety function goal, then to the available equipment required to complete the safety function goal, and then to the parameters that cause pumps and valves to be unavailable, and the design ideas and design logic are determined from top to bottom.

[0023] In a specific embodiment of the present invention, when the security system is a security injection system,

[0024] The logical operation mode of the business logic service module is:

[0025] When the high-pressure safety injection, low-pressure safety injection and injection of the safety injection box are all normal, the safety injection system is judged to be normal;

[0026] For high-pressure safety injection, low-pressure safety injection, and safety injection tank injection, if at least one subsystem is "partially degraded" but no subsystem is "severely degraded", the safety injection system is considered partially degraded;

[0027] For high-pressure safety injection, low-pressure safety injection, and safety injection tank injection, if at least one subsystem is severely degraded, but not all three subsystems are severely degraded, the safety injection system is considered severely degraded.

[0028] If all three subsystems are "severely degraded", the safety injection system is judged to have failed.

[0029] The present invention provides an intelligent nuclear power plant safety system status evaluation method, comprising the following steps:

[0030] Step S1: collecting data;

[0031] Step S2: Business logic service:

[0032] Determine the safety functions to be achieved by the safety system;

[0033] Determine the required implementation path for the security function;

[0034] Determine the equipment that will be used in each implementation path;

[0035] Evaluate the devices used in the implementation path and determine under what conditions the devices will be unavailable.

[0036] Confirm that the relevant equipment judgment data can be collected;

[0037] Display the system status in a hierarchical manner according to the consequences of path failure;

[0038] Design the judgment logic for various states of the safety system, starting with the completion of the safety function objectives, then moving on to the available equipment required to complete the safety function objectives, and finally to the parameters that cause pumps and valves to be unavailable, determining the design ideas and logic from top to bottom;

[0039] Obtaining the unit data or simulator data required for system status judgment;

[0040] The business logic service module builds relevant logic and accesses data, and stores the system status evaluation results in the database;

[0041] Step S3: The front-end display obtains the status evaluation results stored in the database and displays them in a visual interface, including the input triggering conditions of the system status judgment logic and the system status evaluation.

[0042] The present invention also provides an electronic device, comprising the device described in the above technical solution.

[0043] Compared to existing technologies, the intelligent nuclear power plant safety system status evaluation device and method of the present invention utilizes design evaluation logic, conducts hierarchical research on system status, and presents the unit safety system status based on collected data and equipment availability evaluation results. This system status evaluation logic is then developed, along with the relevant human-machine interface, to present the system status evaluation results. This invention achieves intelligent safety system evaluation, overcomes errors caused by human experience, and improves the accuracy of judgments. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Represents the overall framework diagram;

[0045] Figure 2 It is a logic diagram of partial degradation evaluation of high-pressure injection subsystem;

[0046] Figure 3 It is a logic diagram of partial degradation evaluation of low-pressure injection subsystem;

[0047] Figure 4 It is a logic diagram of partial degradation evaluation of the injection box system;

[0048] Figure 5 It is a logic diagram of partial degradation evaluation of safety injection system (RIS);

[0049] Figure 6 It is a logical diagram of the severe degradation assessment of the injection molding system (RIS);

[0050] Figure 7 It is represented as a logic diagram of failure evaluation of RIS system;

[0051] Figures 2 to 7 In the figure, ① indicates that the first high-pressure safety injection pipeline of the high-pressure safety injection subsystem is unavailable, ② indicates that the second high-pressure safety injection pipeline of the high-pressure safety injection subsystem is unavailable, ③ indicates that the first low-pressure safety injection pipeline of the low-pressure safety injection subsystem is unavailable, and ④ indicates that the second low-pressure safety injection pipeline of the low-pressure safety injection subsystem is unavailable. DETAILED DESCRIPTION

[0052] In order to further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than for limiting the present invention.

[0053] The embodiment of the present invention discloses an intelligent nuclear power plant safety system status evaluation device, such as Figure 1 As shown, including:

[0054] Data acquisition module, used for real-time acquisition, processing and storage of various data from power plant simulators and nuclear power units;

[0055] The data acquisition module provides data sources for other modules of the safety system, meeting the requirements of reliability and speed, and mainly includes unit data, simulator data, etc.

[0056] For crew data and simulator data, users can switch between the two through the "Administrator" permission setting, and crew data is selected by default.

[0057] Real-time data collected is stored in the emergency database. Administrators configure data sources and data points through the data collection management program interface. The simulator real-time data reading service reads data files sent by the simulator at a fixed frequency based on the configured power plant operating data and process data points, parses the files, and stores them in the emergency database. The data publishing program responds to requests from the interface, calls an interface to retrieve data from the emergency database, and returns it to the requesting service.

[0058] The emergency database uses the time-series database IOTDB. IOTDB is a database used to manage large amounts of time-series data. It features a SQL-like interface and can support millions of writes per node per second and trillions of data queries per second. It meets the platform's storage requirements and the response speed and concurrency requirements of both real-time and historical databases.

[0059] The business database stores the business data required for operation, such as users, roles, permissions, resources, etc. The data point configuration and business database use relational data MYSQL to meet the business response speed and concurrency performance indicators of this system. The resources stored in the business database include the specific logic used by the business logic service module when performing logical operations; as well as some static resources used by the front-end display module;

[0060] Specifically, the data includes temperature, pressure, flow, device switch signals, power supply voltage data, etc.

[0061] The business logic service module performs logical operations based on the collected data, links the collected data with the equipment status, and evaluates the safety system status;

[0062] The safety system includes a safety injection system, a containment spray system, an instrument compressed air system, an equipment cooling water system, an important plant water system, an auxiliary water supply system, a steam turbine bypass discharge system, an atmosphere monitoring system in the containment, a spent water pool system and a power supply system.

[0063] Business logic service module, including logic operation module and storage module;

[0064] The logic operation module receives the data transmitted by the data acquisition module, performs operations and determines the status of the security system according to the data, and performs corresponding classification according to different statuses;

[0065] The safety system status is classified according to the consequences of path failure. The specific classification method is:

[0066] The state in which the safety function can be completed normally is regarded as normal;

[0067] Partial degradation occurs when some equipment or security system functions are affected, but most security functions can still be completed. The term "most" refers to more than 80%.

[0068] A state where most equipment or safety system functions are affected, but a small portion of safety functions can still be completed corresponds to severe degradation; the small portion refers to less than 20%;

[0069] The state in which the device is completely unusable and cannot complete its safety function is considered as failure.

[0070] The method of the logic operation design is:

[0071] The top level is to complete the safety function goals, then to determine which equipment is needed to complete the safety function goals, and then to determine which parameters will cause pumps and valves to be unavailable, and determine the design ideas and design logic from top to bottom.

[0072] The storage module receives and stores the results of the system status evaluation, and displays the results on the visual interface of the front-end display module.

[0073] The results include the conditions triggered by the input of the system status judgment logic and the system status evaluation.

[0074] The front-end display module displays the system status transmitted by the business logic service module and realizes human-computer interaction.

[0075] The front-end display module includes a control module and a visualization module;

[0076] The control module is used for human-computer interaction. The input data is manually modified through the control module to avoid system status judgment errors caused by unreliable data acquisition.

[0077] The data input by the control module is fed back to the business logic service module to re-judge the system status.

[0078] The present invention analyzes the functions of the safety system and the availability of core equipment, targets the implementation paths of different functions of the safety system, combines the equipment availability required for the paths, and displays the system status in a hierarchical manner according to the final evaluation results of the system status, thereby providing clear and intuitive information to the decision-makers, making it easier for them to make more correct commands based on these system status and unit status.

[0079] The embodiment of the present invention further discloses a method for evaluating the status of an intelligent nuclear power plant safety system, comprising the following steps:

[0080] Step S1: collecting data;

[0081] Step S2: Business logic service:

[0082] Determine the safety functions to be achieved by the safety system;

[0083] Determine the required implementation path for the security function;

[0084] Determine the equipment that will be used in each implementation path;

[0085] Evaluate the devices used in the implementation path and determine under what conditions the devices will be unavailable.

[0086] Confirm that the relevant equipment judgment data can be collected;

[0087] Display the system status in a hierarchical manner according to the consequences of path failure;

[0088] Design the judgment logic for various states of the safety system. The top level is to complete the safety function objectives, then determine which equipment is required to complete the safety function objectives, and then determine which parameters will cause pumps and valves to be unavailable. Determine the design ideas and design logic from top to bottom;

[0089] Obtaining the unit data or simulator data required for system status judgment;

[0090] The business logic service module builds relevant logic and accesses data, and stores the system status evaluation results in the database;

[0091] Step S3: The front-end display obtains the status evaluation results stored in the database and displays them in a visual interface, including the input triggering conditions of the system status judgment logic and the system status evaluation.

[0092] This method uses a B / S architecture and front-end and back-end separation technology, supporting mainstream databases such as ORACLE, SQL Server, DM, and Jincang. It supports access from mainstream browsers (such as IE, Chrome, Firefox, and Qi'anxin Trusted), is compatible with domestic operating systems, runs smoothly on mainstream computers, and facilitates user terminal configuration.

[0093] In order to further understand the present invention, the intelligent nuclear power plant safety system status evaluation device and method provided by the present invention are described in detail below in conjunction with the embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0094] Example 1

[0095] The state evaluation is carried out using the security injection system as an example.

[0096] The safety function of the safety injection system (RIS) is to complete the emergency cooling function of the core when a loss of water accident occurs in the reactor coolant system or a pipe rupture accident occurs in the main steam system.

[0097] In the event of a loss of coolant accident, cooling water is injected into the core to prevent the fuel cladding from melting and to maintain the core geometry and integrity;

[0098] In the event of a main steam pipe rupture accident, this system rapidly injects concentrated boron solution into the reactor coolant system to compensate for the volume change and increased reactivity caused by supercooling of the reactor coolant due to uncontrolled steam generation, thereby quickly and safely shutting down the reactor and preventing the reactor from returning to criticality.

[0099] During the recirculation phase of a loss of coolant accident, part of the pressure boundary of this system acts as an extension of the containment and has the function of a containment barrier.

[0100] The safety injection system (RIS) provides the following auxiliary functions to the reactor:

[0101] During the refueling cold shutdown period, the reactor refueling pool is filled with water;

[0102] Conduct hydrostatic tests on the reactor coolant system using hydrostatic test pump 9RIS011PO;

[0103] In the event of a total power failure (using 9RIS011PO powered by a diesel generator LLS), injecting seal water into the reactor coolant pumps;

[0104] When the flow rate of the reactor coolant system is insufficient, the suction port of the charging pump is switched from the capacity control box to the refueling water tank to prevent rapid dilution accidents;

[0105] During the shutdown period, the suction port of the charging pump is switched from the control box to the refueling water tank to prevent slow dilution accidents;

[0106] Backup between units, as described in the H3.2 regulation: "In the event of loss of off-site AC power and the RRA system is connected", is achieved by means of a bypass line 289VP with a check valve 288VB.

[0107] During shutdown period, when the reactor core loses cooling from the RRA system and the half-pipe operation is in progress, the injection system automatically replenishes water to the reactor core.

[0108] Depending on the RIS system configuration, whether the RIS system can function depends mainly on the status of the following devices:

[0109] High-pressure safety injection (HHSI) pumps RCV001PO, RCV002PO, RCV003PO;

[0110] Low-pressure safety injection (LHSI) pumps RIS001PO, RIS002PO;

[0111] Safety injection box RIS001BA, RIS002BA, RIS003BA;

[0112] Boron injection box upstream isolation valve RIS032VP, RIS033VP;

[0113] Boron injection box downstream containment isolation valve RIS034VP, RIS035VP;

[0114] High pressure injection cold section 034VP bypass isolation valve RIS036VP;

[0115] High-pressure safety injection cold section containment external isolation valve RIS020VP;

[0116] High-pressure injection cold section 020VP bypass isolation valve RIS029VP;

[0117] High-pressure safety hot injection section containment external isolation valve RIS021VP, RIS023VP;

[0118] High-pressure injection pump outlet isolation valve RCV083VP, RCV084VP, RCV085VP, RCV086VP;

[0119] Low-pressure injection cold section containment external isolation valve RIS061VP, RIS063VP, RIS062VP, RIS064VP;

[0120] Low-pressure injection cold section bypass isolation valve RIS030VP, RIS031VP;

[0121] Injection box outlet isolation valve RIS001VP, RIS002VP, RIS003VP;

[0122] The evaluation results of the high-pressure injection subsystem are differentiated by the availability of each high-pressure injection pipeline, such as Figure 2 As shown in the figure, when both high-pressure injection lines are available, it is "normal", when only one high-pressure injection line is available, it is "partially degraded"; when both high-pressure injection lines are unavailable, it is "severely degraded".

[0123] The evaluation results of the low-pressure injection subsystem are differentiated by the availability of each low-pressure injection pipeline, such as Figure 3 As shown in the figure, when both low-pressure safety injection pipelines are available, it is "normal"; when only one high-pressure safety injection pipeline is available, it is "partially degraded"; when both high-pressure safety injection pipelines are unavailable, it is "severely degraded".

[0124] The evaluation results of the safety injection tank injection subsystem are differentiated by the availability of each safety injection tank injection pipeline. When all three safety injection tank injection pipelines are available, it is considered "normal". Figure 4 As shown, when one or two SAF tank injection lines are available, it is “partially degraded”; when all three SAF tank injection lines are unavailable, it is “severely degraded”.

[0125] Based on the evaluation results of the high-pressure injection subsystem, low-pressure injection subsystem, and injection tank injection subsystem, the evaluation rules for the safety injection system (RIS) are formulated as follows:

[0126] Normal: High-pressure safety injection, low-pressure safety injection and injection into the safety injection box are all normal;

[0127] Partial degradation: For high-pressure safety injection, low-pressure safety injection and injection tank injection, at least one subsystem is partially degraded, but no subsystem is severely degraded; e.g. Figure 5 As shown;

[0128] Severe degradation: At least one of the high-pressure safety injection, low-pressure safety injection, and safety injection tank injection subsystems is severely degraded, but not all three subsystems are severely degraded; Figure 6 As shown;

[0129] Failure: All three subsystems are "severely degraded"; e.g. Figure 7 shown.

[0130] The above embodiments are only intended to help understand the method and core concept of the present invention. It should be noted that, without departing from the principles of the present invention, a number of improvements and modifications may be made to the present invention by those skilled in the art, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0131] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent nuclear power plant safety system status evaluation device, characterized in that: include: Data acquisition module, used for real-time acquisition, processing and storage of various data from power plant simulators and nuclear power units; The business logic service module performs logical operations based on the collected data, links the collected data with the equipment status, and evaluates the safety system status. The logical operations in the business logic service module are designed in a top-down manner: from the highest level, the safety function objectives are achieved, then the available equipment required to achieve the safety function objectives, and then the parameters that cause pumps and valves to be unavailable, determining the design ideas and design logic from top to bottom. The safety system status is classified according to the consequences of path failure. The specific classification method is: The state in which the safety function can be completed normally is regarded as normal; Partial degradation occurs when some equipment or safety system functions are affected, but more than 80% of safety functions can still be completed. Most equipment or safety system functions are affected, but 20% or less of the safety functions can still be completed, which corresponds to a severely degraded state; The state of being completely unusable and unable to complete the safety function corresponds to failure; When the safety system is a safety injection system, The logical operation mode of the business logic service module is: When the high-pressure safety injection subsystem, low-pressure safety injection subsystem and safety injection box injection subsystem are all normal, the safety injection system is judged to be normal; If at least one of the high-pressure safety injection subsystem, low-pressure safety injection subsystem, and safety injection tank injection subsystem is "partially degraded" but no subsystem is "severely degraded", the safety injection system is considered partially degraded; If at least one of the high-pressure safety injection subsystem, low-pressure safety injection subsystem, and safety injection tank injection subsystem is severely degraded, but not all three subsystems are severely degraded, the safety injection system is considered severely degraded. If all three subsystems are "severely degraded", the security injection system is considered to be ineffective; The nuclear power unit data and simulator data collected by the data acquisition module can be switched at will; The front-end display module displays the system status transmitted by the business logic service module and realizes human-computer interaction.

2. The intelligent nuclear power plant safety system status evaluation device according to claim 1, characterized in that: The real-time data collected by the data collection module is stored in an emergency database, which adopts an IOTDB time series database.

3. The intelligent nuclear power plant safety system status evaluation device according to claim 1, characterized in that: The business logic service module includes a logic operation module and a storage module; The logic operation module receives the data transmitted by the data acquisition module, performs operations and determines the status of the security system according to the data, and performs corresponding classification according to different statuses; The storage module receives and stores the result of the system status evaluation.

4. The intelligent nuclear power plant safety system status evaluation device according to claim 1, characterized in that: The front-end display module includes a control module and a visualization module; The control module is used for human-computer interaction, and the input data is manually modified through the control module to avoid system status judgment errors caused by unreliable data acquisition; The data input by the control module is fed back to the business logic service module to re-judge the system status.

5. The intelligent nuclear power plant safety system status evaluation device according to claim 2, characterized in that: When the data acquisition module acquires data from the simulator, it reads the data files sent by the simulator at a fixed frequency according to the configured power plant operation data and process data points, parses the files, and stores them in the emergency database.

6. An intelligent nuclear power plant safety system status evaluation method using the intelligent nuclear power plant safety system status evaluation device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1: collecting data; Step S2: Business logic service: Determine the safety functions to be achieved by the safety system; Determine the required implementation path for the security function; Determine the equipment that will be used in each implementation path; Evaluate the devices used in the implementation path and determine under what conditions the devices will be unavailable. Confirm that the relevant equipment judgment data can be collected; Display the system status in a hierarchical manner according to the consequences of path failure; Design the judgment logic for various states of the safety system, starting with the completion of the safety function objectives, then moving on to the available equipment required to complete the safety function objectives, and finally to the parameters that cause pumps and valves to be unavailable, determining the design ideas and logic from top to bottom; Obtaining the unit data or simulator data required for system status judgment; The business logic service module builds relevant logic and accesses data, and stores the system status evaluation results in the database; Step S3: The front-end display obtains the status evaluation results stored in the database and displays them in a visual interface, including the input triggering conditions of the system status judgment logic and the system status evaluation.

7. An electronic device, characterized in that: The invention comprises the device according to any one of claims 1 to 5.

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