A nuclear power plant intelligent isolation range planning system and method
Patent Information
- Application Number
- CN202610668731.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-15
- Publication Date
- 2026-10-23
AI Technical Summary
[0004]现有技术的缺点：高度依赖经验：隔离范围的准确性和最优性完全取决于运行隔离经理的个人能力和经验，存在人为失误风险
自动化与提效：将运行隔离经理从繁重的手工查图、标记工作中解放出来，特别是自动化了复杂的双重隔离规划过程，极大提高了编制隔离方案的效率和准确性。
Smart Images
Figure CN122966176A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of nuclear power plant operation and management technology, specifically relating to a nuclear power plant intelligent isolation range planning system and method. Background Technology
[0002] During the operation of a nuclear power plant, including routine maintenance and refueling overhauls, a large amount of equipment maintenance work is required on the nuclear island, conventional island, and auxiliary facilities systems. To ensure the safe conduct of maintenance work, strict energy isolation, i.e., operational isolation, must be implemented on the equipment to be maintained. For high-risk media such as high-temperature / high-pressure steam, highly corrosive chemicals, and toxic liquids / gases, a double isolation boundary is required, i.e., two independent isolation barriers are set up to ensure the safety of maintenance personnel even if one isolation barrier fails.
[0003] Currently, the development of operational isolation plans primarily relies on the personal experience of the operational isolation manager. The workflow is as follows: The maintenance preparation engineer submits a work order containing equipment codes and isolation requirements. Based on the work order, the operational isolation manager manually reviews documents such as the system PID diagram (piping and instrumentation diagram), equipment list, isolation procedures, and technical specifications. Using experience, the manager identifies the isolation boundary points for valves, switches, etc., that require operation on the PID diagram and manually draws the isolation range. The manager also manually assesses the media risk to determine if double isolation is necessary and identifies suitable double isolation boundary points.
[0004] Disadvantages of existing technologies: High dependence on experience: The accuracy and optimality of the isolation range depend entirely on the individual ability and experience of the operation isolation manager, posing a risk of human error. This is especially true for judging dual isolation requirements and selecting boundaries, which are more prone to oversights due to lack of experience. Low efficiency: Manually reviewing drawings and marking boundary points is time-consuming and labor-intensive. Planning for dual isolation requires finding even more boundary points, further increasing the workload and potentially leading to isolation boundary failures under tight maintenance schedules. Difficulty in optimization: When there are multiple work orders within the same area or system, the operation isolation manager struggles to quickly and accurately identify mergeable isolation operations, often resulting in overlapping isolation ranges or an excessive number of isolation operations. This increases the workload of operation staff and the number of isolation permits, reducing equipment maintenance efficiency. Poor consistency: Plans developed by different operation isolation managers may differ, resulting in low standardization. Inconsistencies are particularly prone to occur in the implementation standards of dual isolation. Safety risks: Manual judgment of high-risk media and dual isolation requirements may overlook some aspects, posing safety hazards to maintenance personnel.
[0005] Therefore, there is an urgent need for a system that can automatically, intelligently, and optimally plan the isolation range to overcome the above-mentioned shortcomings. Summary of the Invention
[0006] The purpose of this invention is to provide a nuclear power plant intelligent isolation range planning system and method, which can simulate and replace some of the core functions of the operation isolation manager, automatically identify and mark the optimal isolation range in the system PID diagram according to the work order requirements, and automatically identify high-risk media requirements and plan dual isolation schemes, thereby achieving standardization, efficiency and optimization of isolation operations.
[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A nuclear power plant intelligent isolation range planning system includes: a central processing server with a built-in virtual operation isolation manager engine; a database connected to the central processing server for storing PID drawing data, equipment asset database, historical isolation scheme database, logical isolation rule base, and media risk attribute database of the nuclear power plant system; a user interaction terminal connected to the central processing server for maintenance preparation engineers to submit work orders and isolation requirements, and for displaying and confirming the generated isolation schemes; and a graphical output module connected to the central processing server for highlighting automatically generated isolation boundary points and isolation ranges on the PID drawings, and for specially marking double isolation boundaries.
[0008] The media risk attribute database includes risk markers for high temperature, high pressure, corrosiveness, and toxicity.
[0009] The isolation manager engine includes a requirement parsing module: used to receive and parse the device codes and isolation requirements in the work order package.
[0010] The isolation manager engine includes a topology analysis module: based on the parsed device codes, it calls PID drawing data from the database to automatically analyze the fluid and electrical connection topology of the devices in the system.
[0011] The isolation manager engine includes a media risk assessment module: used to query the types of media that the device comes into contact with and their risk attributes, and automatically identify high-risk operating conditions that require double isolation.
[0012] The isolation manager engine includes a minimum isolation range calculation module: based on topology analysis results, according to preset logical isolation rules, and combined with media risk assessment results, it automatically applies dual isolation rules to high-risk media, automatically calculates the minimum set of boundary points required to isolate the single device, and forms the minimum isolation range.
[0013] The isolation manager engine includes a multi-work order optimization module: when multiple work orders are detected in the same system or adjacent areas within the same window period, the minimum isolation range of these work orders is automatically overlaid and analyzed to calculate the maximum common isolation range that can simultaneously cover all maintenance equipment. When high-risk media are included, the common isolation range is ensured to meet the dual isolation requirements, thereby enabling multiple work orders to share a single isolation operation.
[0014] The isolation manager engine includes a scheme generation and output module: the final optimized isolation range scheme is visualized on the PID chart through the graphical output module, the double isolation boundary points are highlighted, and a standardized list of isolation operation instructions is generated.
[0015] High-risk operating conditions include temperatures > 60℃, pressure > 0.5MPa, corrosive media, and toxic media.
[0016] A method for intelligent isolation range planning in nuclear power plants, with the following workflow: Step S201: The maintenance engineer submits a work order package through the user interaction terminal; Step S202: The requirements analysis module extracts key equipment information from the work order; Step S203: The topology analysis module locates the devices in the PID diagram and analyzes their connection relationships; Step S203a: The media risk assessment module queries the equipment media properties to determine whether it is a high-temperature, corrosive, or toxic high-risk media, and to determine whether double isolation is required; Step S204: The minimum isolation range calculation module calculates all necessary boundary points for isolating the device based on the rule base and the media risk assessment results. If dual isolation is required, it automatically plans two isolation boundaries. Step S205: The system queries other work orders within the same window period to determine if there are any merging isolations; Step S206: If it exists, the multi-work order optimization module is started to calculate the maximum public isolation range; if it does not exist, proceed to step S207. Step S207: The solution generation and output module will graphically display the final solution and generate an operation list.
[0017] The beneficial effects achieved by this invention are as follows: Automation and Efficiency Improvement: It frees the operation isolation manager from the heavy workload of manual map looking and marking, and in particular, it automates the complex dual isolation planning process, greatly improving the efficiency and accuracy of isolation plan preparation.
[0018] Standardization and Error Reduction: Built-in, unified logical isolation rules ensure consistency and standardization of isolation schemes, significantly reducing the risk of human error. The system enforces dual isolation rules for high-risk media, fundamentally eliminating security loopholes.
[0019] Optimization and burden reduction: By intelligently identifying the "maximum public isolation range" of multiple work orders, the number of isolation permits and the number of times operation shift staff perform specific isolation operations are effectively reduced, directly alleviating the workload of operation personnel, shortening the critical path duration of overhauls, or reducing equipment downtime.
[0020] Digitalization and inheritance: By solidifying expert experience into the system, digital assets that can be inherited and reused are formed, reducing reliance on the experience of specific individuals.
[0021] Enhanced safety: Through automated media risk assessment and dual isolation planning, the integrity of isolation is ensured under high-risk operating conditions, providing maintenance personnel with a higher level of safety assurance. Attached Figure Description
[0022] Figure 1 This is a block diagram of the overall hardware structure of the system. Figure 2 This is a flowchart of the functional modules of the virtual isolation manager engine. Figure 3 This is a schematic diagram illustrating the application of the minimum isolation range.
[0023] Figure 4 A schematic diagram illustrating the optimized application for maximizing public isolation. Figure 5 This is a schematic diagram illustrating a dual-isolation application. Detailed Implementation
[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0025] like Figure 1 As shown, a smart isolation range planning system for nuclear power plants includes: Central Processing Server: As the core of the system, it has a built-in virtual operation isolation management engine.
[0026] Database: Connected to the central processing server, it is used to store PID drawing data of the nuclear power plant system, equipment asset database, historical isolation scheme database, logical isolation rule base, and media risk attribute database (including risk indicators such as high temperature, high pressure, corrosiveness, and toxicity).
[0027] User interaction terminal: Connected to the central processing server, it allows maintenance preparation engineers to submit work order packages and isolation requirements, and is used to display and confirm the isolation scheme generated by the system.
[0028] Graphical output module: Connected to the central processing server, it is used to highlight the isolation boundary points and isolation ranges automatically generated by the system on the PID drawing, and to specially mark the double isolation boundaries.
[0029] The isolation manager engine includes: Requirements parsing module: Used to receive and parse the device codes and isolation requirements in the work order package.
[0030] Topology Analysis Module: Based on the parsed equipment code, it calls the PID drawing data in the database to automatically analyze the fluid and electrical connection topology of the equipment in the system.
[0031] Medium Risk Assessment Module: Used to query the types of media that the equipment comes into contact with and their risk attributes, and automatically identify high-risk operating conditions that require double isolation, such as temperature > 60℃, pressure > 0.5MPa, corrosive media, toxic media, etc.
[0032] Minimum Isolation Range Calculation Module: Based on topology analysis results and preset logical isolation rules, such as "first operable valve upstream", "last drainage / venting point downstream", "first circuit breaker on the power supply side", etc., combined with media risk assessment results, it automatically applies dual isolation rules to high-risk media, such as "two consecutive valves upstream" and "valve + blind flange combination", etc., and automatically calculates the minimum set of boundary points required to isolate the single device, forming the "minimum isolation range".
[0033] Multi-work order optimization module: When the system detects that there are multiple work orders in the same system or adjacent areas within the same window period, this module will automatically perform superimposed analysis on the minimum isolation range of these work orders to calculate the "maximum common isolation range" that can cover all maintenance equipment at the same time. When high-risk media are included, it ensures that the common isolation range meets the dual isolation requirements, thereby enabling multiple work orders to share a single isolation operation.
[0034] Solution generation and output module: The final optimized isolation range solution is visualized on the PID graph through the graphical output module, highlighting the double isolation boundary points and generating a standardized list of isolation operation instructions.
[0035] like Figure 2 As shown, the system workflow is as follows: Step S201: The maintenance engineer submits a work order package through the user interaction terminal.
[0036] Step S202: The requirements analysis module extracts key equipment information from the work order.
[0037] Step S203: The topology analysis module locates the devices in the PID diagram and analyzes their connection relationships.
[0038] Step S203a: The media risk assessment module queries the equipment media properties to determine whether it is a high-risk medium, such as high temperature, corrosion, or toxicity, and to determine whether double isolation is required.
[0039] Step S204: The minimum isolation range calculation module calculates all necessary boundary points for isolating the device based on the rule base and the media risk assessment results. If dual isolation is required, it automatically plans two isolation boundaries.
[0040] Step S205: The system queries other work orders within the same window period to determine if there are any isolations that can be merged.
[0041] Step S206: If it exists, the multi-work order optimization module is started to calculate the maximum public isolation range; if it does not exist, proceed to step S207.
[0042] Step S207: The solution generation and output module will graphically display the final solution and generate an operation list.
[0043] Example: See Figure 3 Suppose that pump A needs maintenance. Upon receiving the work order, the system locates pump A on the PID diagram. Its topology is analyzed: upstream from the main pipe, downstream to the user. Media risk assessment determines that pump A delivers room temperature clean water, requiring no double isolation. Application rules are applied: the nearest operable isolation valve V1 is located upstream, and the nearest operable isolation valve V2 is located downstream. To ensure pressure relief and drainage, the nearest steam trap BD1 is located. Additionally, the supply valve V3 of its auxiliary system needs to be isolated. Finally, the system automatically highlights valves V1, V2, V3, and BD1 on the PID diagram, forming the "minimum isolation range" for pump A.
[0044] See Figure 4 Optimized Scenario: If, within the same service window, not only pump A requires maintenance but also its downstream valve V4, the system will calculate the isolation ranges for pump A (V1, V2, V3, BD1) and valve V4 (V2, V5) separately. The multi-task optimization module will identify V2 as a common point and merge the two ranges for analysis. It finds that by simply closing upstream V1 and V3 and downstream V5, and opening BD1 for pressure relief, both pump A and valve V4 can be safely isolated simultaneously. Therefore, the system will output an optimized "maximum common isolation range" (V1, V3, V5, BD1) and recommend that operators operate within this range instead of performing two separate isolations. This combines what would otherwise require two isolation operations into one, significantly improving efficiency.
[0045] See Figure 5 Example of dual isolation application: Suppose a "high-temperature steam pipeline section" needs maintenance. After receiving the work order, the system locates the target pipeline section on the PID diagram and analyzes its topology. Media risk assessment: The database is queried to confirm that the medium is high-temperature, high-pressure steam, automatically triggering the dual isolation requirement. Application of dual isolation rules: The system automatically finds two consecutive, independently operable isolation valves V1 and V2 upstream, and two consecutive, independently operable isolation valves V3 and V4 downstream. Within the isolation section, a steam trap BD1 is located for pressure relief. Finally, the system marks V1, V2, V3, V4, and BD1 with special colors and highlights on the PID diagram, forming a safe isolation scheme that meets the dual isolation requirements, and clearly marks the "dual isolation" label in the operation list.
Claims
1. A smart isolation range planning system for nuclear power plants, characterized in that: include: Central processing server: Built-in virtual machine isolation management engine; Database: Connected to the central processing server, it stores PID drawing data, equipment asset database, historical isolation scheme database, logical isolation rule base, and media risk attribute database for the nuclear power plant system; User interaction terminal: Connected to the central processing server, it allows maintenance preparation engineers to submit work orders and isolation requirements, and is used to display and confirm the generated isolation schemes; Graphical output module: Connects to the central processing server to highlight automatically generated isolation boundary points and isolation ranges on the PID drawing, and to specially mark double isolation boundaries.
2. The intelligent isolation range planning system for nuclear power plants according to claim 1, characterized in that: The media risk attribute database includes risk markers for high temperature, high pressure, corrosiveness, and toxicity.
3. The intelligent isolation range planning system for nuclear power plants according to claim 1, characterized in that: The isolation manager engine includes a requirement parsing module: used to receive and parse the device codes and isolation requirements in the work order package.
4. The intelligent isolation range planning system for nuclear power plants according to claim 3, characterized in that: The isolation manager engine includes a topology analysis module: based on the parsed device codes, it calls PID drawing data from the database to automatically analyze the fluid and electrical connection topology of the devices in the system.
5. The intelligent isolation range planning system for nuclear power plants according to claim 1, characterized in that: The isolation manager engine includes a media risk assessment module: used to query the types of media that the device comes into contact with and their risk attributes, and automatically identify high-risk operating conditions that require double isolation.
6. The intelligent isolation range planning system for nuclear power plants according to claim 4, characterized in that: The isolation manager engine includes a minimum isolation range calculation module: based on topology analysis results, according to preset logical isolation rules, and combined with media risk assessment results, it automatically applies dual isolation rules to high-risk media, automatically calculates the minimum set of boundary points required to isolate the single device, and forms the minimum isolation range.
7. The intelligent isolation range planning system for nuclear power plants according to claim 1, characterized in that: The isolation manager engine includes a multi-work order optimization module: when multiple work orders are detected in the same system or adjacent areas within the same window period, the minimum isolation range of these work orders is automatically overlaid and analyzed to calculate the maximum common isolation range that can simultaneously cover all maintenance equipment. When high-risk media are included, the common isolation range is ensured to meet the dual isolation requirements, thereby enabling multiple work orders to share a single isolation operation.
8. The intelligent isolation range planning system for nuclear power plants according to claim 1, characterized in that: The isolation manager engine includes a scheme generation and output module: the final optimized isolation range scheme is visualized on the PID chart through the graphical output module, the double isolation boundary points are highlighted, and a standardized list of isolation operation instructions is generated.
9. The intelligent isolation range planning system for nuclear power plants according to claim 5, characterized in that: High-risk operating conditions include temperatures > 60℃, pressure > 0.5MPa, corrosive media, and toxic media.
10. A method for intelligent isolation range planning in nuclear power plants, characterized in that: The workflow is as follows: Step S201: The maintenance engineer submits a work order package through the user interaction terminal; Step S202: The requirements analysis module extracts key equipment information from the work order; Step S203: The topology analysis module locates the devices in the PID diagram and analyzes their connection relationships; Step S203a: The media risk assessment module queries the equipment media properties to determine whether it is a high-temperature, corrosive, or toxic high-risk media, and to determine whether double isolation is required; Step S204: The minimum isolation range calculation module calculates all necessary boundary points for isolating the device based on the rule base and the media risk assessment results. If dual isolation is required, it automatically plans two isolation boundaries. Step S205: The system queries other work orders within the same window period to determine if there are any merging isolations; Step S206: If it exists, the multi-work order optimization module is started to calculate the maximum public isolation range; If it does not exist, proceed to step S207; Step S207: The solution generation and output module will graphically display the final solution and generate an operation list.