System and method for automatically checking source of foreign matter in primary loop of nuclear power plant

Abstract

The invention relates to a nuclear power plant primary loop foreign matter source automatic troubleshooting system and method. The system comprises a characteristic parameter input module, an equipment information database, an equipment maintenance information database, a twin three-dimensional model, a foreign matter automatic troubleshooting module and a report issuing module. The feature parameter input module inputs foreign matter feature parameters; the equipment information database stores component information of all overcurrent equipment of a loop; the equipment maintenance information database stores all maintenance information of a loop; the twinborn three-dimensional model carries out simulation and visual display on a loop system and equipment; the foreign matter automatic troubleshooting module matches the equipment information database and / or the equipment maintenance information database one by one according to the foreign matter feature parameters to form a foreign matter troubleshooting logic program and output a foreign matter source troubleshooting result; and the report issuing module generates a foreign matter checking analysis report. According to the method, the foreign matter source analysis and troubleshooting accuracy and efficiency are improved, potential abnormity of equipment is found in advance, and therefore non-planned shutdown overhaul of a unit is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of foreign object detection in nuclear power plants, and more specifically, to an automatic foreign object source detection system and method for the primary loop of a nuclear power plant. Background Technology

[0002] The primary loop of a nuclear power plant is where the reactor coolant resides. Because the fluids in the primary loop are in direct contact with the nuclear fuel, they are highly radioactive, and the reliability of the primary loop is directly related to nuclear safety. The presence of foreign objects in the primary loop can cause vibration, wear, and other aging phenomena in the corresponding equipment components. In severe cases, it can lead to the destruction of the pressure boundary integrity of the primary loop, allowing radioactive fluids to diffuse into the secondary loop and even the environment. Currently, the investigation and prevention of foreign objects in the primary loop faces the following two challenges:

[0003] The source of the anomaly is difficult to pinpoint. Foreign objects may originate from inside or outside the primary circuit. If they originate from inside the primary circuit, their source is difficult to determine due to the circulating current characteristics of the primary circuit. If they originate from outside the primary circuit, they may be related to foreign objects introduced during maintenance. In this case, it is necessary to conduct a thorough investigation of a large amount of maintenance data.

[0004] Currently, power plants employ root cause analysis to analyze the sources of foreign objects in the primary circuit. This method requires extensive evidence collection and verification, resulting in low efficiency and poor accuracy of the investigation results. Each investigation necessitates a comprehensive review, a process conducted manually, which leads to poor usability of the investigation data and limited applicability of best practices developed during the investigation process to subsequent foreign object prevention. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an automatic detection system and method for foreign object sources in the primary loop of a nuclear power plant, addressing the problems existing in the prior art.

[0006] The technical solution adopted by this invention to solve its technical problem is: constructing an automatic foreign matter source detection system for the primary loop of a nuclear power plant, comprising:

[0007] A feature parameter input module, wherein the feature parameter input module is used to input foreign object feature parameters;

[0008] The equipment information database is used to store component information of all current-carrying devices in a single circuit, and interacts with the twin 3D model and is called by the foreign object automatic detection module.

[0009] The equipment maintenance information database is used to store all maintenance information of the first circuit, and interacts with the twin 3D model and is called by the foreign object automatic detection module.

[0010] The twin 3D model is used to simulate and visualize the medium flow direction, equipment elevation, and equipment flow dimensions under various operating conditions of the primary loop system, and to compare and visualize the basic component information of the equipment with the characteristics of foreign objects.

[0011] The foreign object automatic detection module is used to match the foreign object characteristic parameters one by one with the equipment information database and / or equipment maintenance information database, form a foreign object detection logic program and output the foreign object source detection result;

[0012] The report generation module is used to generate a foreign object investigation and analysis report based on the results of the foreign object source investigation.

[0013] In the automatic foreign object source detection system for the primary loop of a nuclear power plant described in this invention, the foreign object characteristic parameters include: the material, specifications, location, unit status, and whether the foreign object is movable.

[0014] In the automatic foreign object source detection system for the primary loop of a nuclear power plant described in this invention, the material of the foreign object includes: the composition of the foreign object and the corresponding material grade;

[0015] The specifications include: size, shape, length, width, diameter, particle size, and thickness of the foreign object;

[0016] The location includes: the current location information of the foreign object when it is detected;

[0017] The unit status includes: the state of the unit when a foreign object is detected;

[0018] Whether the foreign object is movable is defined as whether the foreign object is continuously moving in the current environment and whether it can flow from a low elevation position to a high elevation position.

[0019] In the automatic foreign object source detection system for the primary loop of a nuclear power plant described in this invention, the component information of all current-carrying devices in the primary loop includes:

[0020] Material information for pipes, pipe flanges, and flange gaskets;

[0021] Material information for the valve body, valve disc, valve shaft, valve disc connecting bolts, and valve chamber sealing gasket;

[0022] Material information for pump casing, impeller, pump shaft, impeller connecting bolts, and pump chamber sealing gasket;

[0023] Material information for the heat exchanger housing, heat transfer tubes, and heat exchanger gaskets;

[0024] Material information for the tank shell, internal structural components, flanges, and gaskets;

[0025] Material information for the pressure vessel shell, in-core components, flanges, and gaskets;

[0026] Material information for the steam generator casing, internal parts, flanges, and gaskets.

[0027] In the automatic foreign object source detection system for the primary loop of a nuclear power plant described in this invention, the maintenance information includes: the type of maintenance tool, the quantity of maintenance tools, the material information of the maintenance tools, the maintenance area / equipment, the maintenance operation method, and the material information used for maintenance.

[0028] In the automatic foreign object source detection system for the primary loop of a nuclear power plant described in this invention, the equipment information database is also used for indexing based on keywords and dynamically displaying the information in the twin 3D model.

[0029] In the automatic foreign object source detection system for the primary loop of a nuclear power plant described in this invention, the equipment maintenance information database is also used to search based on any one or more of the following: equipment, maintenance tools, and time.

[0030] In the nuclear power plant primary loop foreign object source automatic investigation system described in this invention, the twin 3D model uses a single device as the smallest display area, allowing users to select devices and visually displaying the selected devices and the material information of their components.

[0031] This invention also provides an automatic method for detecting foreign object sources in the primary loop of a nuclear power plant, comprising the following steps:

[0032] Foreign object feature parameters are obtained through the feature parameter input module;

[0033] The foreign object automatic detection module matches the foreign object characteristic parameters one by one with the equipment information database and / or equipment maintenance information database to form a foreign object detection logic program, and performs foreign object source detection based on the foreign object detection logic program to obtain the foreign object source detection result;

[0034] The report generation module analyzes the source of foreign objects based on the results of the foreign object source investigation and generates a foreign object investigation analysis report.

[0035] In the automatic foreign object source detection method for the primary loop of a nuclear power plant described in this invention, the method further includes:

[0036] The twin 3D model is used to compare and visualize the basic component information of the equipment with the characteristics of foreign objects.

[0037] The automatic foreign object source detection system and method for the primary loop of a nuclear power plant, implementing the present invention, has the following beneficial effects: It includes a feature parameter input module, an equipment information database, an equipment maintenance information database, a twin 3D model, an automatic foreign object detection module, and a report generation module. The feature parameter input module inputs foreign object feature parameters; the equipment information database stores component information of all current-carrying equipment in the primary loop; the equipment maintenance information database stores all maintenance information of the primary loop; the twin 3D model simulates and visualizes the primary loop system and equipment; the automatic foreign object detection module matches the foreign object feature parameters one by one with the equipment information database and / or the equipment maintenance information database to form a foreign object detection logic program and output the foreign object source detection results; the report generation module generates a foreign object detection analysis report. This invention improves the accuracy and efficiency of foreign object analysis and detection, detects potential equipment anomalies in advance, and thus reduces unplanned unit shutdowns for maintenance. Attached Figure Description

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of the automatic foreign object source detection system for the primary loop of a nuclear power plant provided in this embodiment of the invention.

[0040] Figure 2 This is a flowchart illustrating the automatic foreign object source detection method for the primary loop of a nuclear power plant provided in this embodiment of the invention.

[0041] Figure 3 This is a simplified one-loop flowchart provided in an embodiment of the present invention. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] To address the problems of traditional methods for analyzing the sources of foreign matter in the primary loop of nuclear power plants, this invention provides an automated system and method for detecting the sources of foreign matter in the primary loop of nuclear power plants.

[0044] refer to Figure 1 This illustrates a preferred embodiment of the automatic foreign object source detection system for the primary loop of a nuclear power plant provided by the present invention. Specifically, as shown... Figure 1As shown, the automatic foreign object source detection system for the primary loop of the nuclear power plant includes: a feature parameter input module 101, an equipment information database 102, an equipment maintenance information database 104, a twin 3D model 103, an automatic foreign object detection module 105, and a report generation module 106. In this embodiment of the invention, the feature parameter input module 101 is used to input foreign object feature parameters.

[0045] In this embodiment of the invention, foreign object characteristic parameters can include multiple dimensions, such as the size of the foreign object, its material, its specifications, its mobility (i.e., whether it is movable), and the location where it was found. The more dimensions of information input, the more accurate the investigation results. Optionally, foreign object characteristic parameters include, but are not limited to: the material, specifications, location, unit status, and whether the foreign object is movable. The material of the foreign object includes, but is not limited to: its constituent components and corresponding material grades. Specifications include, but are not limited to: the size, shape, length, width, diameter, particle size, and thickness of the foreign object. Location includes: the current location of the foreign object when it is detected, such as the system or equipment in which it is located. Unit status includes: the state of the unit when the foreign object is detected. This state includes, but is not limited to, the current state of the unit and its recent possible states. For example, it could be normal operation, hot shutdown, cold shutdown, or a breach in the primary circuit. Whether the foreign object is movable refers to whether it is continuously moving in the current environment and whether it can flow from a lower elevation to a higher elevation. Among them, the parameter of whether the foreign object is movable is effective in relation to the density and size of the foreign object.

[0046] The equipment information database 102 is used to store component information of all overcurrent equipment in a primary circuit, and interacts with the twin 3D model 103 and is called by the foreign object automatic detection module 105.

[0047] Optionally, in this embodiment of the invention, the component information of all overcurrent devices in a primary loop includes, but is not limited to, the following component information:

[0048] Material information for pipes, pipe flanges, and flange gaskets;

[0049] Material information for the valve body, valve disc, valve shaft, valve disc connecting bolts, and valve chamber sealing gasket;

[0050] Material information for pump casing, impeller, pump shaft, impeller connecting bolts, and pump chamber sealing gasket;

[0051] Material information for the heat exchanger housing, heat transfer tubes, and heat exchanger gaskets;

[0052] Material information for the tank shell, internal structural components, flanges, and gaskets;

[0053] Material information for the pressure vessel shell, in-core components, flanges, and gaskets;

[0054] Material information for the steam generator casing, internal parts, flanges, and gaskets.

[0055] The equipment information database 102 can be indexed based on keywords (such as material, component, etc.) and dynamically displayed in the twin 3D model 103.

[0056] The equipment maintenance information database 104 is used to store all maintenance information of the primary circuit, and interacts with the twin 3D model 103 and is called by the foreign object automatic detection module 105.

[0057] Optionally, in this embodiment of the invention, the maintenance information includes, but is not limited to: the type of maintenance tool, the quantity of maintenance tools, the material information of the maintenance tools, the maintenance area / equipment, the maintenance operation method (such as welding, cutting, grinding, replacement, etc.), and the material information used for maintenance. The equipment maintenance information database 104 can be searched based on any one or more of the following: equipment, maintenance tools, and time.

[0058] The twin 3D model 103 is used to simulate and visualize the flow direction of media, equipment elevation, and equipment flow dimensions under various operating conditions of the primary loop system. It compares and visualizes information based on basic equipment component information and foreign object characteristics. The twin 3D model 103 uses a single device as the smallest display area, allowing users to select devices and visually displaying the selected devices and their component material information. Optionally, the twin 3D model 103 can identify the elevation, pipe diameter, and key node equipment (such as filters) of the primary loop flow equipment and display related identification information. Through this twin 3D model 103, after identifying the possible source of a foreign object, users can intuitively see the plant information and equipment information where it is located, facilitating on-site personnel to determine its specific location and further assess the accuracy of the source based on experience.

[0059] The foreign object automatic detection module 105 is used to match the equipment information database 102 and / or equipment maintenance information database 104 one by one according to the foreign object characteristic parameters, form a foreign object detection logic program and output the foreign object source detection result.

[0060] The report generation module 106 is used to generate a foreign object investigation and analysis report based on the results of the foreign object source investigation.

[0061] The automatic foreign object source detection system for the primary loop of nuclear power plants, as described in this invention, can automatically detect foreign objects, reduce the time spent on manual analysis, improve the efficiency of foreign object detection and analysis, enhance the reliability of safe operation of nuclear power plants, and continuously provide positive feedback for the prevention and control of foreign objects in power plants.

[0062] refer to Figure 2 The present invention also provides an automatic method for detecting foreign object sources in the primary loop of a nuclear power plant. This automatic method for detecting foreign object sources in the primary loop of a nuclear power plant can be implemented using the aforementioned automatic foreign object source detection system for the primary loop of a nuclear power plant.

[0063] Specifically, such as Figure 2 As shown, the automatic foreign object source detection method for the primary loop of this nuclear power plant includes the following steps:

[0064] Step S201: Obtain foreign object feature parameters through feature parameter input module 101.

[0065] Step S202: The foreign object automatic detection module 105 matches the equipment information database 102 and / or the equipment maintenance information database 104 one by one based on the foreign object characteristic parameters to form a foreign object detection logic program, and performs foreign object source detection based on the foreign object detection logic program to obtain the foreign object source detection result.

[0066] The automatic foreign object detection model can automatically identify the source of foreign objects, saving manpower from analyzing a small amount of equipment and maintenance information, and saving personnel from repeatedly analyzing the operating status, pipeline flow direction, and foreign object boundary range of complex systems.

[0067] In a preferred embodiment, the investigation of the source of foreign objects can be achieved through the following steps:

[0068] Suppose a foreign object is detected in the current device, and the material, size and shape (sheet-like) of the foreign object are determined, and its density is greater than the density of the primary loop fluid.

[0069] The specific identification steps are as follows:

[0070] The first step is to determine whether there are filters upstream and downstream of the foreign object based on its current location, such as the current device where the foreign object is located (by matching the device information database 102 one by one). If there is a filter upstream of the current device, the filter diameter of the filter is obtained, and the initial source of the foreign object is preliminarily determined by combining the fluid flow direction (including the current device, the filter upstream of the current device, and the device located between the filter and the current device).

[0071] Second, verify the material information of the components of the current device, the upstream filter, and the device located between the filter and the current device, as well as the piping between these devices. Based on this material information, conduct a foreign object source investigation. If the material of the device located between the filter and the current device, or the flow-through component of the current device, is the same as the material of the foreign object, then the foreign object is determined to originate from the current device or the device located between the filter and the current device.

[0072] The third step involves checking the maintenance information in the maintenance information database against the maintenance information of the upstream filter and the equipment between the filter and the current equipment during the last maintenance cycle. This determines whether any tools are made of foreign material. If so, it is determined whether the tool could have dropped the thin, flaky foreign object. If not, it indicates that the object did not fall from the tool. Next, the maintenance operation method is checked to determine if any grinding operations were performed. If grinding operations were performed on the equipment between the filter and the current equipment during the previous maintenance cycle, the foreign object was introduced through the maintenance of the equipment between the filter and the current equipment.

[0073] The fourth step is to continue to accurately identify the source of the foreign object. Check whether there is any foreign object of the same material as the foreign object that may have fallen into the equipment between the filter and the current equipment or inside the current equipment. If the inspection results show that no parts of the equipment between the filter and the current equipment or inside the current equipment have fallen off, it can be determined that the foreign object was introduced from the maintenance and grinding work of the filter and the current equipment.

[0074] like Figure 3 A flowchart of a simple one-loop circuit is shown. Figure 3 In the diagram, the five flow paths are arranged in the order ABCDEFGA, with the elevation information of these seven devices displayed on the right. The numbers 1234567 represent the seven pipes.

[0075] Example 1: Suppose a foreign object is found at point C. The object is made of Z2CN1810 and is a thin sheet with dimensions of 5mm*5mm. Its density is greater than that of the primary loop fluid.

[0076] The process for identifying the source of foreign objects is as follows:

[0077] The first step is to check if there are filters or other equipment upstream and downstream of equipment C. Assuming that A is a filter with a diameter of 0.5mm, and considering the fluid flow direction, the foreign object may come from equipment A, B, or C.

[0078] The second step is to check the material information of the components of equipment A, B, and C, as well as pipes 1 and 2. If only the flow-through components of equipment B and C are made of Z2CN1810, then the foreign object may come from equipment B and C.

[0079] The third step is to check the maintenance information database of A, B, and C during the last maintenance cycle to see if there are any tools made of Z2CN1810. If so, determine whether the tool could have dropped the thin-film foreign object. If not, it means that the object did not fall from the tool. Then, check the maintenance operation method to see if there was any grinding operation. If equipment B had grinding operation in the last maintenance cycle, the foreign object was most likely introduced by the maintenance of equipment B.

[0080] The fourth step is to check whether there is any possibility of Z2CN1810 material foreign objects falling into the inside of equipment B and C. If the inspection results show that no parts inside equipment B and C have fallen off, it means that the foreign objects were introduced from the maintenance and grinding operation of equipment B.

[0081] Alternatively, in another preferred embodiment, the investigation of the source of foreign objects can be achieved through the following steps:

[0082] Suppose a foreign object is detected in the current device, and the material, size, and shape of the foreign object (smooth, elongated) are determined, and its density is greater than the density of the primary loop fluid. There is no filter in the loop.

[0083] The first step is to determine the initial source of the foreign object based on the foreign object density information, as well as the loop flow direction and elevation information.

[0084] The second step is to further screen the initial source based on whether the primary loop pipe has a lining, thus obtaining a secondary source.

[0085] The third step is to verify the material information and drawing information of each device in the loop, and then identify the source again based on the material information and drawing information of each device to obtain the source three times.

[0086] The fourth step is to verify the maintenance information of each device in the circuit, identify the source of the foreign object based on the maintenance information of each device, and finally determine the source of the foreign object.

[0087] Figure 3 A flowchart of a simple one-loop circuit is shown. Figure 3 In the diagram, the five flow paths are arranged in the order ABCDEFGA, with the elevation information of these seven devices displayed on the right. The numbers 1234567 represent the seven pipes.

[0088] Example 2: Suppose a foreign object is found at point D. It is made of 316L stainless steel, is a smooth, elongated strip with dimensions of 20mm*5mm*1mm, and has a density greater than that of the primary loop fluid. There is no filter in the loop.

[0089] The first step, based on the foreign object density information, loop flow direction and elevation information, indicates that the foreign object may come from equipment ABCDEF or pipelines 1234.

[0090] The second step is to directly rule out pipes 1234, because the primary loop pipe has no lining, and foreign objects cannot fall directly from the inner wall of the pipe in a smooth, long strip shape. Therefore, the foreign object may come from equipment ABCDEF.

[0091] The third step is to check the material information of devices ABCDEF. If only devices BC contain parts made of 316L material, it means that if the foreign object came from inside, it was caused by falling off from devices B or C. At this time, check the drawings of devices B and C to see if they have the possibility of dropping long strip-shaped foreign objects. If only device B has the possibility of dropping long strip-shaped foreign objects, it means that the foreign object is most likely a part that fell off from device B.

[0092] The fourth step is to check the maintenance information database of ABCDEF. If the historical maintenance tools for equipment C show that long, thin tools were used and that breakage occurred, it indicates that the foreign object may have originated from the maintenance of equipment C. According to the foreign object prevention management report for the maintenance of equipment C, if the broken maintenance tool was not introduced into equipment C, then the foreign object can be ruled out as originating from the maintenance of equipment C. Therefore, the foreign object originated from the breakage and detachment of a part inside equipment B.

[0093] Step S203: Generate a foreign object investigation analysis report based on the foreign object source investigation results through the report generation module 106.

[0094] Furthermore, the automatic method for detecting foreign object sources in the primary loop of the nuclear power plant also includes: comparing and visualizing the basic component information of the equipment with the characteristics of the foreign object using a twin 3D model 103.

[0095] The automatic foreign object source detection system and method for the primary loop of nuclear power plants according to the present invention have the following advantages:

[0096] Advantage 1: It can automatically narrow down the scope of foreign object investigation based on the characteristics of the foreign object.

[0097] Specifically, regarding material, the material of the foreign object can be compared with the material information of internal equipment and external maintenance materials. Those matching the material (i.e., the same material as the foreign object) are included as potential sources, thus narrowing down the range of foreign object sources. Regarding specifications, the specifications of the foreign object can be compared with the specifications of equipment parts and consumables and tools used during maintenance. Those matching the specifications are included as potential sources, thus narrowing down the range of foreign object sources. Regarding location, the flow characteristics of the foreign object can be compared to narrow down its possible activity range, thus narrowing down the range of foreign object sources. Regarding unit status, the location can be considered to determine the possible activity range of the foreign object, because different unit statuses result in different activated systems and equipment, further causing changes in the activity range of the foreign object. Regarding whether the foreign object is movable, its location can be considered to narrow down its activity range. For example, if the foreign object can only move downstream, then only upstream equipment needs to be identified as a potential source; if the foreign object can only move from high to low, then only connected high-level equipment needs to be identified as a potential source.

[0098] Advantage 2: It can automatically determine whether the foreign object comes from inside or outside the primary circuit.

[0099] Advantage 3: The twin 3D model 103 can simulate the flow of media under various operating conditions of the system.

[0100] By using a twin 3D model 103 to simulate the flow of media under various working conditions, the system can automatically narrow down the scope of investigation for foreign objects based on their characteristics.

[0101] Advantage 4: The twin 3D model 103 can simulate the elevation of system equipment.

[0102] Advantage 5: The twin 3D model 103 can simulate the flow dimensions of system equipment.

[0103] Advantage 6: The twin 3D model 103 can record basic component information of the equipment and can be compared with the characteristics of foreign objects.

[0104] Advantage 7: This system enables automatic detection and report generation of foreign objects, reducing manpower input.

[0105] Advantage 8: The accuracy of the investigation scope is positively correlated with the accuracy of the foreign object characteristics.

[0106] Advantage 9: The system automatically connects with the historical maintenance information of nuclear power plants and updates equipment maintenance information regularly.

[0107] Advantage 10: The system compares the characteristics of foreign objects with the maintenance information of system equipment.

[0108] Advantage 11: The system automatically determines the metal grade based on the proportion of foreign metal materials.

[0109] The equipment information and maintenance information both include corresponding material information. By comparing the entered material information with the material information of foreign objects, the grade information (i.e., metal grade) can be obtained.

[0110] This invention is based on the digitization of foreign object characteristics and comparison with system equipment components, maintenance consumables, common tools, and special tools. Simultaneously, based on the unit's operating mode, system medium flow direction, and equipment 3D elevation information, corresponding algorithmic functions are developed to achieve intelligent foreign object location, improve the accuracy of foreign object analysis and investigation, and detect potential equipment anomalies in advance, especially avoiding major equipment damage, thereby reducing unplanned unit shutdowns for maintenance. It significantly reduces the workload of engineers in power plant foreign object prevention teams, operations, and equipment engineers. By integrating multiple data sources, it automates and integrates data flows, standardizes foreign object analysis tools, and greatly improves the efficiency of engineers.

[0111] This invention enables rapid location of foreign objects in the primary loop system of nuclear power plants, significantly improving the automation level of foreign object detection and reducing tedious manual work. It fully utilizes the system platform to achieve data integration and interoperability, generating standardized 3D models of nuclear power plant system processes and equipment, further reducing manual input and management costs. Currently, it has been effectively applied in the tracing and analysis of foreign objects in nuclear fuel, pressure vessels, and connection systems of nuclear power plants, achieving significant results.

[0112] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0113] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0114] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0115] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They do not limit the scope of protection of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A nuclear power plant primary circuit foreign matter source automatic search system, characterized by, The application comprises: a feature parameter input module for inputting foreign matter feature parameters; a device information database for storing component information of all flow devices in a loop, interacting with a twin three-dimensional model, and being called by a foreign matter automatic checking module; a device maintenance information database for storing all maintenance information of the loop, interacting with the twin three-dimensional model, and being called by the foreign matter automatic checking module; a twin three-dimensional model for simulating and visually displaying various working condition medium flow directions, device elevations, and device flow-through sizes of the loop system, comparing device basic component information with foreign matter features, and visually displaying the comparison results; a foreign matter automatic checking module for matching the device information database and / or the device maintenance information database according to the foreign matter feature parameters, forming a foreign matter checking logic program, and outputting foreign matter source checking results; a report issuing module for generating a foreign matter checking analysis report according to the foreign matter source checking results.

2. The nuclear power plant primary circuit foreign matter source automatic search system according to claim 1, characterized by, The foreign matter feature parameters include: material, size, location, unit state, and whether the foreign matter is movable.

3. The nuclear power plant primary circuit foreign matter source automatic searching system according to claim 2, characterized by, The material of the foreign matter includes: composition and corresponding material grade of the foreign matter. The size includes: size, shape, length, width, diameter, particle size, and thickness of the foreign matter. The location includes: current position information of the foreign matter when the foreign matter is checked. The unit state includes: state of the unit when the foreign matter is checked. Whether the foreign matter is movable refers to whether the foreign matter is continuously moving in the current environment and whether the foreign matter can flow from a low elevation position to a high elevation position.

4. The nuclear power plant primary circuit foreign matter source automatic searching system according to claim 1, characterized by, The component information of all flow devices in the loop includes: material information of a pipeline, material information of a pipeline flange, and material information of a flange gasket; material information of a valve housing, material information of a valve disc, material information of a valve shaft, material information of a valve disc connecting bolt, and material information of a valve chamber sealing gasket; material information of a pump housing, material information of an impeller, material information of a pump shaft, material information of an impeller connecting bolt, and material information of a pump chamber sealing gasket; material information of a heat exchanger housing, material information of a heat transfer pipe, and material information of a heat exchanger sealing gasket; material information of a storage tank housing, material information of an internal structural part, material information of a flange and a sealing gasket; material information of a pressure vessel housing, material information of an in-pile component, material information of a flange and a sealing gasket; material information of a steam generator housing, material information of an internal part, material information of a flange and a sealing gasket.

5. The nuclear power plant primary circuit foreign matter source automatic searching system according to claim 1, characterized by, The maintenance information includes: types and quantities of maintenance tools, material information of the maintenance tools, maintenance areas / maintenance devices, maintenance operation methods, and material information used in maintenance.

6. The nuclear power plant primary circuit foreign matter source automatic searching system according to any one of claims 1 to 5, characterized by, The device information database is further used for indexing according to keywords and dynamically displaying in the twin three-dimensional model.

7. The nuclear power plant primary circuit foreign matter source automatic searching system according to any one of claims 1 to 5, characterized by, The device maintenance information database is further used for searching according to any one or more of devices, maintenance tools, and time.

8. The nuclear power plant primary circuit foreign matter source automatic searching system according to any one of claims 1 to 5, characterized by, The twin three-dimensional model takes a single device as a minimum display interval, and provides a user with a selection of devices, and visual display of the user-selected device and component material information of the device.

9. A method for automatically checking a source of foreign matter in a primary circuit of a nuclear power plant, characterized by, The method comprises the following steps: Obtain foreign matter characteristic parameters through a characteristic parameter input module; An automatic foreign matter investigation module matches a device information database and / or a device maintenance information database one by one based on the foreign matter characteristic parameters, forms a foreign matter investigation logic program, and performs foreign matter source investigation based on the foreign matter investigation logic program to obtain a foreign matter source investigation result; Generate a foreign matter investigation analysis report according to the foreign matter source investigation result through a report output module.

10. The nuclear power plant primary circuit foreign matter source automatic search method according to claim 9, characterized by, The method further comprises: Compare and visually display device basic component information and foreign matter characteristics through a twin three-dimensional model.

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