Method, device and storage medium for determining operation technical specification of nuclear power plant

Abstract

The application relates to the technical field of nuclear power plant operation, in particular to a nuclear power plant operation technical specification determination method and device, equipment and a storage medium. The method comprises the following steps: obtaining limit condition corresponding to each operation system in each operation mode in a nuclear power plant from a database; obtaining operation parameters of each operation system in a current operation mode in the nuclear power plant; if the operation parameters of any operation system do not meet the limit condition corresponding to the current operation mode, determining a risk index of the nuclear power plant when the operation parameters of the operation system do not meet the corresponding limit condition according to the operation state of the nuclear power plant; determining a safety configuration time and a safety configuration operation according to the risk index; and determining a conventional operation specification of the nuclear power plant according to the safety configuration time and the safety configuration operation. The application can optimize the accuracy of the design of each nuclear power plant operation technical specification.

Description

Nuclear power plant operation technical specifications determine methods, devices, equipment and storage media. Technical Field

[0001] This application relates to the field of nuclear power plant operation technology, and in particular to a method, apparatus, equipment and storage medium for determining nuclear power plant operation technical specifications. Background Technology

[0002] The Nuclear Power Plant Operation Technical Specifications define the minimum technical requirements that must be followed to ensure the safety of the public and workers during normal operation of a nuclear power plant. These include reactor normal operation limits, system safety functions that participate in ensuring the integrity of the three barriers under different operating modes, and operation control strategies adopted when the normal operation limits are exceeded.

[0003] During the preparation of the "Operating Technical Specifications", the operating requirements of each system need to be determined based on the power plant system design, safety system settings, operating constraints and safety limits, and on the basis of safety analysis.

[0004] The existing methods for determining operating technical specifications usually refer to existing operating technical specifications. However, the above methods are only applicable to the design of replica nuclear power plants and do not have universal applicability. Therefore, improvements are urgently needed. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, apparatus, equipment, and storage medium for determining nuclear power plant operation technical specifications that can optimize the accuracy of the design of operation technical specifications for various nuclear power plants, in order to address the above-mentioned technical problems.

[0006] Firstly, this application provides a method for determining the operating technical specifications of a nuclear power plant, the method comprising:

[0007] Filter from the database to obtain the limit conditions corresponding to each operating system in the nuclear power plant under each operating mode;

[0008] Obtain the operating parameters of each operating system within the nuclear power plant under the current operating mode;

[0009] If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk index of the nuclear power plant is calculated based on the operating status of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions.

[0010] Based on risk indicators, determine the timing and operation of security configuration.

[0011] Based on the safety configuration time, safety configuration operation, and limit conditions, determine the routine operation specifications for nuclear power plants.

[0012] In one embodiment, the risk indicators include instantaneous risk indicators;

[0013] Based on risk indicators, determine the security configuration time and security configuration operations, including:

[0014] The security configuration time is determined based on the instantaneous risk indicators and the corresponding cumulative risk indicator thresholds.

[0015] The security configuration time is compared with each preset cutoff time to obtain the comparison result; each cutoff time corresponds to a candidate configuration operation.

[0016] Based on the comparison results, the secure configuration operation is determined from each candidate configuration operation.

[0017] In one embodiment, the instantaneous risk indicator includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds.

[0018] Correspondingly, based on the instantaneous risk indicators and the corresponding cumulative risk indicator thresholds, the security configuration time is determined, including:

[0019] For any instantaneous risk sub-indicator, the candidate configuration time is determined based on the instantaneous risk sub-indicator and the corresponding cumulative risk sub-indicator threshold.

[0020] The minimum candidate configuration time among all candidate configuration times is taken as the safe configuration time.

[0021] In one embodiment, the operating specifications of the nuclear power plant are determined based on the safety configuration time and safety configuration operation, including:

[0022] Determine the limit matrix based on the limit conditions of each operating system under each operating mode;

[0023] For any operating system, the corresponding safety configuration time and safety configuration operation are associated with the limit matrix to obtain the normal operating specifications of the nuclear power plant.

[0024] In one embodiment, the method further includes:

[0025] If the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition are determined.

[0026] Based on the emergency configuration time and emergency configuration operation, determine the emergency operation procedures for the nuclear power plant.

[0027] In one embodiment, the database stores the security functions corresponding to each operating system in each operating mode; the limit conditions of any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

[0028] Secondly, this application also provides a device for determining the operating technical specifications of nuclear power plants, the device comprising:

[0029] The retrieval module is used to retrieve the limit conditions corresponding to each operating system in the nuclear power plant from the database. The database stores the limit conditions of each operating system under each operating mode, which are obtained through offline analysis of nuclear power plant safety analysis results, transient analysis results, operating mode classification, and regulations and standards.

[0030] The acquisition module is used to acquire the operating parameters of each operating system in the nuclear power plant under the current operating mode;

[0031] The analysis module is used to determine the risk indicators of the nuclear power plant when the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, based on the operating status of the nuclear power plant.

[0032] The configuration module is used to determine the security configuration time and security configuration operation based on risk indicators.

[0033] The generation module is used to determine the routine operating procedures of a nuclear power plant based on the safety configuration time and safety configuration operations.

[0034] Thirdly, this application also provides a computer device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0035] Retrieve the limit conditions for each operating system in the nuclear power plant under each operating mode from the database;

[0036] Obtain the operating parameters of each operating system within the nuclear power plant under the current operating mode;

[0037] If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions are determined according to the operating status of the nuclear power plant.

[0038] Based on risk indicators, determine the timing and operation of security configuration.

[0039] Determine the routine operating procedures for nuclear power plants based on safety configuration time and safety configuration operations.

[0040] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0041] Retrieve the limit conditions for each operating system in the nuclear power plant under each operating mode from the database;

[0042] Obtain the operating parameters of each operating system within the nuclear power plant under the current operating mode;

[0043] If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions are determined according to the operating status of the nuclear power plant.

[0044] Based on risk indicators, determine the timing and operation of security configuration.

[0045] Determine the routine operating procedures for nuclear power plants based on safety configuration time and safety configuration operations.

[0046] Fifthly, this application also provides a computer program product comprising a computer program that, when executed by a processor, performs the following steps:

[0047] Retrieve the limit conditions for each operating system in the nuclear power plant under each operating mode from the database;

[0048] Obtain the operating parameters of each operating system within the nuclear power plant under the current operating mode;

[0049] If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions are determined according to the operating status of the nuclear power plant.

[0050] Based on risk indicators, determine the timing and operation of security configuration.

[0051] Determine the routine operating procedures for nuclear power plants based on safety configuration time and safety configuration operations.

[0052] The aforementioned methods, devices, equipment, and storage media for determining nuclear power plant operation technical specifications, for any nuclear power plant, ensure a more comprehensive management scope for the generated routine operation specifications by fully considering the operating parameters and limit conditions corresponding to all operating systems. When any limit condition fails (single limit condition), corresponding safety configuration time and safety configuration operation are generated, which can fully consider the impact of the operating status of each operating system on the entire nuclear power plant. That is, for any nuclear power plant, the determined routine operation technical specifications consist of the safety configuration time and safety configuration operation corresponding to that nuclear power plant, making the routine operation technical specifications more targeted and accurate. Attached Figure Description

[0053] Figure 1 is a flowchart illustrating a method for determining the operating technical specifications of a nuclear power plant in one embodiment;

[0054] Figure 2 is a flowchart illustrating the process of determining routine operating technical specifications in one embodiment;

[0055] Figure 3 is a flowchart illustrating the process of determining emergency operation technical specifications in one embodiment;

[0056] Figure 4 is a flowchart illustrating the process of determining the security configuration time and security configuration operation in one embodiment;

[0057] Figure 5 is a flowchart illustrating the calculation of candidate configuration time in one embodiment;

[0058] Figure 6 is a flowchart illustrating the method for determining the operating technical specifications of a nuclear power plant in another embodiment;

[0059] Figure 7 is a structural block diagram of a device for determining the operating technical specifications of a nuclear power plant in one embodiment;

[0060] Figure 8 is an internal structure diagram of a computer device in one embodiment. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0062] First, some nouns or terms that appear in the description of this embodiment are to be interpreted as follows: (1) Limit conditions: Limit conditions specify the minimum requirements for ensuring the safe operation of nuclear power units. The measures section of an operating limit condition specifies various events that represent various situations in which the operating limit conditions are not met, and specifies the measures to be taken and the corresponding completion time for each event.

[0063] (2) Operating mode: The operating mode is the unit status when there are fuel assemblies in the reactor building, including any combination of the following factors: reactivity status, core thermal power, average temperature of reactor coolant, and bolt tension status of reactor pressure vessel top cover.

[0064] (3) Safety functions: Safety functions refer to the functions required to ensure the safe operation of a nuclear power plant, including functions such as reactivity control, core heat removal, and shielding and containment of radioactive materials.

[0065] The method for determining nuclear power plant operation technical specifications provided in this application embodiment is applicable to scenarios involving nuclear power plant operation technical specifications. Optionally, this method can be executed by a computer device, which can be a server or a terminal device. Specifically, in one embodiment, as shown in Figure 1, the method specifically includes the following steps:

[0066] S101, retrieve the limit conditions corresponding to each operating system in the nuclear power plant under each operating mode from the database.

[0067] Each operating system has different limit conditions under different operating modes. The limit conditions of the operating system are used to limit the operating status of each operating device related to the safety function in the corresponding operating mode. The operating status includes whether it is in use and the operating parameters.

[0068] Specifically, in this embodiment, the limit conditions stored in the database are analyzed offline by operations engineers, and the database is updated accordingly with system upgrades and modifications. The offline analysis process includes: a) Based on relevant domestic and international regulations and standards, selecting the initial assumptions, systems, and equipment (including supporting systems and their functions) that should be included in the technical specifications explicitly required by the regulations; b) Combining safety analysis results and relevant safety analysis reports to determine the systems and equipment related to operating limits or safety limits; c) Based on the transient analysis process of the nuclear power plant, determining the list of required systems and equipment under different operating modes; d) Combining operational experience feedback, evaluating operating events that have occurred in other types of nuclear power plants at home and abroad, conducting causal analysis, and supplementing the systems involved in the operating technical specifications; e) Under different operating modes, the transient analysis results and safety analysis results may differ, and the operating mode should be distinguished when determining the management scope of the technical specifications.

[0069] S102, Obtain the operating parameters of each operating system in the nuclear power plant under the current operating mode.

[0070] The current operating mode refers to the operating mode of the nuclear power plant at the current moment.

[0071] Understandably, during the design process of developing operational technical specifications, each operating system has corresponding design operating parameters (rated operating parameters). In the subsequent optimization of these specifications, the actual operating parameters of the nuclear power plant are used to determine the operational technical specifications for each system. Therefore, the operating parameters corresponding to each operating system in the current operating mode refer to the actual operating parameters of the system during operation in that mode. For any given operating system, if the actual operating parameters of that system do not meet the corresponding limit conditions, then those limit conditions are deemed invalid.

[0072] For example, taking the safety injection system in the operating technical specifications of a nuclear power plant as an example, based on the three major safety functions of a nuclear power plant, the safety injection system is boron-containing water, performing reactivity control, residual heat removal, and radioactive containment. Correspondingly, the limit conditions for this safety injection system include borylation-dilution in reactivity control, coolant replenishment in core residual heat removal, and containment isolation in radioactive containment. Specifically, taking the power operation mode as an example, the limit conditions for this safety injection system in the power operation mode are shown in Table 1 below:

[0073] Table 1

[0074]

[0075]

[0076] As shown in Table 1, the limit conditions for the safety injection system in power operation mode include: requirements for boric acid concentration, boron solution temperature, and boric acid storage in the safety injection system loop during boration-dilution; requirements for capacity, boron concentration, and temperature of the refueling tank during coolant replenishment; quantity requirements for high-pressure and low-pressure safety injection systems; requirements for nitrogen pressure, boric acid concentration, and boric acid storage in the medium-pressure safety injection tank; and requirements for containment isolation valves in the safety injection system based on the three-barrier consideration during radioactive containment.

[0077] S103 If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of the operating system do not meet the corresponding limit conditions shall be determined according to the operating status of the nuclear power plant.

[0078] Wherein, if any operating parameter of a system does not meet the limit conditions corresponding to the current operating mode, it means that the operating parameter does not meet the requirements of the corresponding limit conditions.

[0079] Specifically, the operating status of a nuclear power plant can be defined as the actual operating status of the nuclear power plant, corresponding to the actual operating parameters of each operating system.

[0080] Understandably, the definition of risk R for nuclear power plants is as follows:

[0081]

[0082] Among them, F i C represents the frequency of occurrence of the i-th failure mode. i Let N be the consequence of the occurrence of the i-th failure mode, and N be the total number of all failure modes.

[0083] In this embodiment, risk indicators can be broadly categorized into quantitative and qualitative risk indicators. Quantitative risk indicators include: 1) Instantaneous risk indicators: Core Destruction Frequency (CDF), Early Large-Scale Radioactive Release Frequency (LERF); 2) Cumulative risk indicators: Core Destruction Frequency Increment (ΔCDF), Cumulative Risk Increment per Configuration (ICDP), Cumulative Risk Increment per Configuration (ILERF), Allowable Configuration Time (ACT), Weekly Risk Level, Annual Risk Level; 3) Importance: Available Equipment FV Importance, Available Equipment RAW Importance, Unavailable Equipment RRW Importance, Initiating Event Importance. Qualitative risk indicators include: 1) Degree of weakening of security functions and defense-in-depth of security systems; 2) Human-caused events: Pre-initiating human-caused events, and human-caused events that caused the initiating event. The quantitative risk indicators can be calculated using corresponding probabilistic safety analysis models.

[0084] Specifically, if the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, the operating status of the nuclear power plant is collected and input into the corresponding probabilistic safety analysis model, such as the PSA model corresponding to the probabilistic safety assessment (PSA) method. This model analyzes the operating status of the nuclear power plant and obtains the corresponding risk indicators.

[0085] S104, Based on risk indicators, determine the security configuration time and security configuration operation.

[0086] Here, the safety configuration time represents the allowed configuration time for the management to respond to the risk event corresponding to the risk indicator, and the safety configuration operation represents the configuration operation performed by the management in response to the risk event corresponding to the risk indicator. For example, the configuration operation may include: maintenance operation, controllable retreat of the reactor, immediate restoration of risk-critical decommissioned equipment, immediate deployment of mobile equipment to replace failed equipment, and immediate activation of equipment in standby status, etc.

[0087] Specifically, after obtaining the risk indicators output by the probabilistic security analysis model, the security configuration time corresponding to the risk indicator can be determined based on the functional relationship between the risk indicator and the configuration time. Then, the corresponding security configuration operation can be found from the corresponding configuration operation lookup table according to the importance level of the risk indicator. The configuration operation lookup table includes multiple configuration operations corresponding to the risk indicators.

[0088] S105, based on safety configuration time and safety configuration operation, determines the routine operating procedures for nuclear power plants.

[0089] It is understood that in this embodiment, the actual operating parameters of each operating system are monitored, and when the operating parameters do not meet the corresponding limit conditions, the corresponding safety configuration time and safety configuration operation can be automatically matched to generate the normal operating specifications of the nuclear power plant.

[0090] In the aforementioned method for determining the operating technical specifications of nuclear power plants, for any nuclear power plant, the management scope of the generated routine operating specifications is more comprehensive, provided that all operating parameters and limit conditions corresponding to all operating systems are fully considered. When any limit condition fails (single limit condition), a corresponding safety configuration time and safety configuration operation are generated, which can fully consider the impact of the operating status of each operating system on the entire nuclear power plant. That is, for any nuclear power plant, the determined routine operating technical specifications are composed of the safety configuration times and safety configuration operations corresponding to that nuclear power plant, making the routine operating technical specifications more targeted and accurate.

[0091] As shown in Figure 2, this embodiment provides an optional method for determining the operating specifications of a nuclear power plant based on safety configuration time and safety configuration operations, that is, a method for refining S104. The specific implementation process may include:

[0092] S201, determine the limit matrix based on the limit conditions of each operating system in each operating mode.

[0093] The database stores the security functions corresponding to each operating system in each operating mode; the limit conditions for any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

[0094] Specifically, the limit conditions for each operating system are decomposed to the device level to form a limit condition matrix, which can be shown in Table 2 below:

[0095] Table 2

[0096]

[0097]

[0098] In Table 2, under the corresponding operating modes, taking operating system Sy1 as an example, the limit conditions corresponding to operating system Sy1 include the limit conditions corresponding to safety function F11, the limit conditions corresponding to safety function F12, ..., the limit conditions corresponding to safety function F1n. For example, the limit conditions corresponding to safety function F11 can be used to limit the operating status of the first and second operating devices under the operating system; the limit conditions corresponding to safety function F12 can be used to limit the operating status of the first and third operating devices under the operating system; and the limit conditions corresponding to safety function F11 can be used to limit the operating status of the third and fourth operating devices under the operating system.

[0099] Correspondingly, when determining whether the operating parameters of any operating system meet the limit conditions corresponding to the current operating mode, it is necessary to determine whether the operating parameters of any corresponding operating device within the operating system meet the limit conditions corresponding to the corresponding safety function.

[0100] S202, for any operating system, associate the corresponding safety configuration time and safety configuration operation with the limit matrix to obtain the normal operating specifications of the nuclear power plant.

[0101] Specifically, for any operating system, the security configuration time and security configuration operation corresponding to that operating system are associated with the corresponding limit conditions in the above limit matrix to form the operating specifications corresponding to each operating system. The matrix form is more intuitive and facilitates the statistics or generation of other forms of routine operating technical specifications.

[0102] Furthermore, in this embodiment, to improve safety, a more conservative standard is also provided, as shown in Figure 3. That is, the nuclear power plant operation technical standard method further includes:

[0103] S301, if the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then determine the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition.

[0104] If multiple limit conditions fail, for example, if two limit conditions fail, then the emergency configuration condition is determined to be met. At this time, based on the preset emergency configuration lookup table, the emergency configuration operation and emergency configuration time are determined. Optionally, the emergency configuration time in this embodiment can be a preset value, such as 1 hour, 2 hours, etc.; the emergency configuration operation can be a maintenance operation or a retreat.

[0105] In one possible implementation, when each limit condition fails, a corresponding security configuration time and security configuration operation are generated. However, in this embodiment, the emergency configuration time is shorter than any security configuration time, and the priority of the emergency configuration operation is higher than the priority of any security configuration operation.

[0106] In another possible implementation, when each limit condition fails, there is no need to determine the corresponding risk indicators, that is, there is no need to generate each security configuration time and security configuration operation, only emergency configuration time and emergency configuration operation are generated.

[0107] S302, based on emergency configuration time and emergency configuration operations, determines the emergency operation specifications for nuclear power plants.

[0108] Specifically, after determining the emergency operation procedures, the priority (execution order) of the emergency operation procedures can be configured to be higher than that of the regular operation procedures.

[0109] In this embodiment, by generating emergency coordination time and emergency configuration operations, the conventional operating procedures are supplemented, and the operating technical specifications of nuclear power plants are further optimized.

[0110] As shown in Figure 4, in this embodiment, to facilitate quantitative analysis using the probabilistic security analysis model, the risk indicators include instantaneous risk indicators. This embodiment provides an optional method for determining the security configuration time and security configuration operation based on risk indicators, that is, it provides a way to refine S103. The specific implementation process may include:

[0111] S401, determine the security configuration time based on the instantaneous risk indicators and the corresponding cumulative risk indicator thresholds.

[0112] Instantaneous risk refers to the risk level calculated under specific nuclear power plant configurations. Core damage frequency (CDF) and early large radioactive release frequency (LERF) are generally used as indicators of instantaneous risk.

[0113] Cumulative risk describes the cumulative effect of risks over a certain period of time, such as the cumulative value of all risks caused by different nuclear power plant configurations over a week / month / year. It can be used to assess the overall operational safety management level of a nuclear power plant over a period of time. The Incremental Probability of Core Damage (ICDP) and the Incremental Probability of Early Massive Radioactive Release (ILERP) are generally used as indicators of cumulative risk.

[0114] Optionally, instantaneous risk indicators are related to the nuclear power plant's operating configuration, the status of the nuclear power plant's operating systems, and the status of the nuclear power plant's operating equipment. The nuclear power plant's operating configuration includes: ① Equipment outage: Equipment groups are out of service due to testing or maintenance, including equipment that may have some or all functions that can be restored; ② Nuclear power plant configuration adjustments: Switching between operating and standby trains, power supply switching, and opening or closing of cross-connections between trains; ③ Events affecting nuclear power plant risk: Increased frequency of initiating events caused by equipment damage, failure, or other human error, or an increased probability of equipment failure; ④ Factors related to the nuclear power plant's operating status: For example, changes in operating modes, changes in heat removal pathways, changes in the coolant system, etc. In addition, there are the influences of external environmental factors, such as typhoons and seasonal climate.

[0115] Specifically, when calculating the safe configuration time under the condition that any limit condition fails, it can be based on the integral relationship between the instantaneous risk index and the cumulative risk index, that is, instantaneous risk index * time increment (Δt) ≤ cumulative risk index threshold. Furthermore, assuming the initial condition is a zero maintenance risk index, the time increment Δt is the safe configuration time.

[0116] S402 compares the security configuration time with each preset cutoff time to obtain the comparison result.

[0117] Each cutoff time is used to implement hierarchical configuration. Each cutoff time can be adjusted based on empirical values. Each cutoff time corresponds to a candidate configuration operation. In this embodiment, each candidate configuration operation can be a maintenance operation or a rollback.

[0118] For example, if the currently calculated security configuration time is 7 hours, and each cutoff time includes the first cutoff time (1 hour), the second cutoff time (8 hours), and the third cutoff time (24 hours), then the comparison result is that the current security configuration time is greater than the first cutoff time (1 hour) and less than the second cutoff time (8 hours). It can also be said that the security configuration time falls within the interval formed by the first cutoff time and the second cutoff time.

[0119] S403, Based on the comparison results, determine the secure configuration operation from among the candidate configuration operations.

[0120] As shown in the example above, the candidate configuration operation corresponding to the first cutoff time is taken as the safety configuration operation. In this embodiment, by selecting the candidate configuration operation corresponding to the smallest cutoff time within the interval of the safety configuration time, the timeliness of the corresponding safety configuration operation is given priority. At the same time, each cutoff time is used to realize hierarchical configuration, eliminating the need to configure safety configuration operations specifically for each safety configuration time (e.g., 1 hour 5 minutes, 1 hour 10 minutes, 2 hours 30 minutes), reducing the design complexity of the operation technical specifications, and ensuring the operation safety of the nuclear power plant.

[0121] Furthermore, in order to make the calculated security configuration time more accurate, the instantaneous risk indicator in this embodiment includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds.

[0122] As shown in Figure 5, this embodiment provides an optional method for determining the security configuration time based on instantaneous risk indicators and the corresponding cumulative risk indicator thresholds, i.e., a method for refining S301. The specific implementation process may include:

[0123] S501, for any instantaneous risk sub-indicator, determine the candidate configuration time based on the instantaneous risk sub-indicator and the corresponding cumulative risk sub-indicator threshold.

[0124] Optionally, the instantaneous risk sub-indicators in this embodiment include the incremental probability of core damage (ICDP) and the incremental probability of early massive radioactive release (ILERP); correspondingly, the cumulative risk indicators in this embodiment include the incremental probability of core damage (ICDP) and the incremental probability of early massive radioactive release (ILERP); and the threshold for the incremental probability of core damage is 10. -6 (i.e., ICDP≤10) -6 The threshold for the early large-scale radioactive release probability increment is ILERF ≤ 10⁻⁷ (i.e., ILERF ≤ 10⁻⁷). -7 In this embodiment, the zero maintenance risk index is CDF0 = 0, and ILERF0 = 0.

[0125] For any instantaneous risk sub-indicator, the corresponding time increment Δt is calculated. For example, the time increment corresponding to the core damage probability increment is Δt1, and the time increment corresponding to the early large-scale radioactive release probability increment is Δt2. That is, Δt1 and Δt2 are both candidate configuration times.

[0126] S502 uses the minimum candidate configuration time among all candidate configuration times as the safe configuration time.

[0127] Specifically, Δt1 and Δt2 are compared, and the candidate configuration time with the smallest value is selected as the safe configuration time.

[0128] In this embodiment, by configuring multiple instantaneous risk sub-indicators, the risk impact of a single failure limit condition on the operation of the nuclear power plant can be measured from multiple dimensions; the candidate configuration time with the minimum value is taken as the safe configuration time, so as to give priority to ensuring the operational safety of the nuclear power plant.

[0129] For example, based on the above embodiments, this embodiment provides an optional example of a method for determining the operating technical specifications of a nuclear power plant. As shown in Figure 6, the specific implementation process includes:

[0130] S601, retrieve the limit conditions corresponding to each operating system in the nuclear power plant under each operating mode from the database.

[0131] S602, obtain the operating parameters of each operating system in the nuclear power plant under the current operating mode.

[0132] S603 If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions shall be determined according to the operating status of the nuclear power plant.

[0133] S604 determines the security configuration time based on the instantaneous risk indicators and the corresponding cumulative risk indicator thresholds.

[0134] Among them, risk indicators include instantaneous risk indicators.

[0135] S605 compares the security configuration time with each preset truncation time to obtain the comparison result; where each truncation time corresponds to a candidate configuration operation.

[0136] S606, based on the comparison results, determines the secure configuration operation from among the candidate configuration operations.

[0137] S607, determine the limit matrix based on the limit conditions of each operating system in each operating mode.

[0138] S608, for any operating system, associates the corresponding safety configuration time and safety configuration operation with the limit matrix to obtain the routine operating specifications of the nuclear power plant.

[0139] If the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition are determined; based on the emergency configuration time and emergency configuration operation, the emergency operation specifications of the nuclear power plant are determined.

[0140] The specific processes of S601-S608 described above can be found in the description of the above method embodiments. Their implementation principles and technical effects are similar, and will not be repeated here.

[0141] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps.

[0142] Based on the same inventive concept, this application also provides a nuclear power plant operation technical specification determination apparatus for implementing the above-described method for determining nuclear power plant operation technical specifications. The solution provided by this apparatus is similar to the solution described in the above-described method. Therefore, the specific limitations in one or more embodiments of the nuclear power plant operation technical specification determination apparatus provided below can be found in the limitations of the nuclear power plant operation technical specification determination method described above, and will not be repeated here.

[0143] In one embodiment, as shown in FIG7, a nuclear power plant operation technical specification determination device 1 is provided, comprising: a retrieval module 11, an acquisition module 12, an analysis module 13, a configuration module 14, and a generation module 15, wherein:

[0144] The retrieval module 11 is used to retrieve the limit conditions corresponding to each operating system in the nuclear power plant under each operating mode from the database.

[0145] The acquisition module 12 is used to acquire the operating parameters of each operating system in the nuclear power plant under the current operating mode;

[0146] The analysis module 13 is used to determine the risk indicators of the nuclear power plant when the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, based on the operating status of the nuclear power plant.

[0147] Configuration module 14 is used to determine the security configuration time and security configuration operation based on risk indicators;

[0148] The generation module 15 is used to determine the routine operating procedures of the nuclear power plant based on the safety configuration time and safety configuration operation.

[0149] In one embodiment, the risk indicators include instantaneous risk indicators; the analysis module 13 includes:

[0150] The calculation submodule is used to determine the security configuration time based on the instantaneous risk indicator and the corresponding cumulative risk indicator threshold.

[0151] The comparison submodule is used to compare the security configuration time with each preset truncation time to obtain the comparison result; each truncation time corresponds to a candidate configuration operation.

[0152] The configuration submodule is used to determine the secure configuration operation from the candidate configuration operations based on the comparison results.

[0153] In one embodiment, the instantaneous risk indicator includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds; the calculation submodule is further configured to: for any instantaneous risk sub-indicator, determine the candidate configuration time based on the instantaneous risk sub-indicator and the cumulative risk sub-indicator threshold corresponding to the instantaneous risk sub-indicator;

[0154] The minimum candidate configuration time among all candidate configuration times is taken as the safe configuration time.

[0155] In one embodiment, the generation module 15 is further configured to: determine the limit matrix based on the limit conditions corresponding to each operating system in each operating mode;

[0156] For any operating system, the corresponding safety configuration time and safety configuration operation are associated with the limit matrix to obtain the normal operating specifications of the nuclear power plant.

[0157] In one embodiment, the nuclear power plant operation technical specification determination device further includes an emergency module, which is used to: if the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, determine the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition;

[0158] Based on the emergency configuration time and emergency configuration operation, determine the emergency operation procedures for the nuclear power plant.

[0159] In one embodiment, the database stores the security functions corresponding to each operating system in each operating mode; the limit conditions of any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

[0160] The aforementioned nuclear power plant operation technical specifications stipulate that each module in the device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0161] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram is shown in Figure 8. The computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores data related to the method for determining the operating technical specifications of a nuclear power plant. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for determining the operating technical specifications of a nuclear power plant.

[0162] Those skilled in the art will understand that the structure shown in Figure 8 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or may combine certain components, or may have different component arrangements.

[0163] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0164] Retrieve the limit conditions for each operating system in the nuclear power plant under each operating mode from the database;

[0165] Obtain the operating parameters of each operating system within the nuclear power plant under the current operating mode;

[0166] If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions are determined according to the operating status of the nuclear power plant.

[0167] Based on risk indicators, determine the timing and operation of security configuration.

[0168] Determine the routine operating procedures for nuclear power plants based on safety configuration time and safety configuration operations.

[0169] In one embodiment, the risk indicators include instantaneous risk indicators; when the processor executes the logic of the computer program to determine the security configuration time and security configuration operation based on the risk indicators, the following steps are specifically implemented: determining the security configuration time based on the instantaneous risk indicators and the cumulative risk indicator threshold corresponding to the instantaneous risk indicators; comparing the security configuration time with each preset cutoff time to obtain the comparison result; wherein, each cutoff time corresponds to a candidate configuration operation; and determining the security configuration operation from each candidate configuration operation based on the comparison result.

[0170] In one embodiment, the instantaneous risk indicator includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds. When the processor executes the computer program to determine the logic for determining the safe configuration time based on the instantaneous risk indicator and the corresponding cumulative risk indicator threshold, the following steps are specifically implemented: For any instantaneous risk sub-indicator, a candidate configuration time is determined based on the instantaneous risk sub-indicator and the corresponding cumulative risk sub-indicator threshold; the candidate configuration time with the minimum value among the candidate configuration times is taken as the safe configuration time.

[0171] In one embodiment, when the processor executes the logic of a computer program to determine the operating specifications of a nuclear power plant based on the safety configuration time and safety configuration operation, the following steps are specifically implemented: determining a limit matrix based on the limit conditions corresponding to each operating system in each operating mode; for any operating system, associating the safety configuration time and safety configuration operation corresponding to that operating system with the limit matrix to obtain the normal operating specifications of the nuclear power plant.

[0172] In one embodiment, when the processor executes the computer program, it also performs the following steps: if the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition are determined; and the emergency operation specifications of the nuclear power plant are determined based on the emergency configuration time and emergency configuration operation.

[0173] In one embodiment, the database stores the security functions corresponding to each operating system in each operating mode; the limit conditions of any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

[0174] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0175] Retrieve the limit conditions for each operating system in the nuclear power plant under each operating mode from the database;

[0176] Obtain the operating parameters of each operating system in the nuclear power plant under the current operating mode; if the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, determine the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions based on the operating status of the nuclear power plant.

[0177] Based on risk indicators, determine the timing and operation of security configuration.

[0178] Determine the routine operating procedures for nuclear power plants based on safety configuration time and safety configuration operations.

[0179] In one embodiment, the risk indicators include instantaneous risk indicators; when the logic of the computer program determining the security configuration time and security configuration operation based on the risk indicators is executed by the processor, the following steps are specifically implemented: determining the security configuration time based on the instantaneous risk indicators and the cumulative risk indicator threshold corresponding to the instantaneous risk indicators; comparing the security configuration time with each preset cutoff time to obtain a comparison result; wherein, each cutoff time corresponds to a candidate configuration operation; and determining the security configuration operation from each candidate configuration operation based on the comparison result.

[0180] In one embodiment, the instantaneous risk indicator includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds. When the logic for determining the safe configuration time based on the instantaneous risk indicator and the corresponding cumulative risk indicator threshold is executed by the processor, the computer program specifically implements the following steps: for any instantaneous risk sub-indicator, a candidate configuration time is determined based on the instantaneous risk sub-indicator and the corresponding cumulative risk sub-indicator threshold; the candidate configuration time with the minimum value among the candidate configuration times is taken as the safe configuration time.

[0181] In one embodiment, when the logic of the computer program determining the operating specifications of the nuclear power plant based on the safety configuration time and safety configuration operation is executed by the processor, the following steps are specifically implemented: determining the limit matrix according to the limit conditions corresponding to each operating system in each operating mode; for any operating system, associating the safety configuration time and safety configuration operation corresponding to the operating system with the limit matrix to obtain the normal operating specifications of the nuclear power plant.

[0182] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: if the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition are determined; and the emergency operation specifications of the nuclear power plant are determined based on the emergency configuration time and emergency configuration operation.

[0183] In one embodiment, the database stores the security functions corresponding to each operating system in each operating mode; the limit conditions of any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

[0184] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0185] Retrieve the limit conditions for each operating system in the nuclear power plant under each operating mode from the database;

[0186] Obtain the operating parameters of each operating system within the nuclear power plant under the current operating mode;

[0187] If the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then the risk indicators of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions are determined according to the operating status of the nuclear power plant.

[0188] Based on risk indicators, determine the timing and operation of security configuration.

[0189] Determine the routine operating procedures for nuclear power plants based on safety configuration time and safety configuration operations.

[0190] In one embodiment, the risk indicators include instantaneous risk indicators; when the logic of the computer program determining the security configuration time and security configuration operation based on the risk indicators is executed by the processor, the following steps are specifically implemented: determining the security configuration time based on the instantaneous risk indicators and the cumulative risk indicator threshold corresponding to the instantaneous risk indicators; comparing the security configuration time with each preset cutoff time to obtain a comparison result; wherein, each cutoff time corresponds to a candidate configuration operation; and determining the security configuration operation from each candidate configuration operation based on the comparison result.

[0191] In one embodiment, the instantaneous risk indicator includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds. When the logic for determining the safe configuration time based on the instantaneous risk indicator and the corresponding cumulative risk indicator threshold is executed by the processor, the computer program specifically implements the following steps: for any instantaneous risk sub-indicator, a candidate configuration time is determined based on the instantaneous risk sub-indicator and the corresponding cumulative risk sub-indicator threshold; the candidate configuration time with the minimum value among the candidate configuration times is taken as the safe configuration time.

[0192] In one embodiment, when the logic of the computer program determining the operating specifications of the nuclear power plant based on the safety configuration time and safety configuration operation is executed by the processor, the following steps are specifically implemented: determining the limit matrix according to the limit conditions corresponding to each operating system in each operating mode; for any operating system, associating the safety configuration time and safety configuration operation corresponding to the operating system with the limit matrix to obtain the normal operating specifications of the nuclear power plant.

[0193] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: if the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition are determined; and the emergency operation specifications of the nuclear power plant are determined based on the emergency configuration time and emergency configuration operation.

[0194] In one embodiment, the database stores the security functions corresponding to each operating system in each operating mode; the limit conditions of any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

[0195] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0196] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0197] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining the operating technical specifications of a nuclear power plant, characterized in that, The method includes: obtaining the limit conditions corresponding to each operating system in the nuclear power plant under each operating mode from a database; obtaining the operating parameters of each operating system in the nuclear power plant under the current operating mode; if the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, then determining the risk index of the nuclear power plant when the operating parameters of that operating system do not meet the corresponding limit conditions based on the operating status of the nuclear power plant; wherein, the limit conditions of any operating system are used to limit the operating status of each operating device related to the safety function within the operating system under the corresponding operating mode; the risk index includes instantaneous risk index; The instantaneous risk refers to the risk level calculated under a specific nuclear power plant configuration. A safe configuration time is determined based on the integral relationship between the instantaneous risk index and the corresponding cumulative risk index threshold. The cumulative risk index describes the cumulative effect of the risk. The safe configuration time is compared with each preset cutoff time to obtain a comparison result. Each cutoff time corresponds to a candidate configuration operation. Based on the comparison result, a safe configuration operation is determined from the candidate configuration operations. The routine operation procedures of the nuclear power plant are determined based on the safe configuration time and the safe configuration operation.

2. The method according to claim 1, characterized in that, The instantaneous risk indicator includes multiple instantaneous risk sub-indicators, and the cumulative risk indicator threshold corresponding to the instantaneous risk indicator includes multiple cumulative risk sub-indicator thresholds. Correspondingly, determining the safe configuration time based on the integral relationship between the instantaneous risk indicator and the corresponding cumulative risk indicator threshold includes: for any instantaneous risk sub-indicator, determining a candidate configuration time based on the integral relationship between the instantaneous risk sub-indicator and the corresponding cumulative risk sub-indicator threshold; and taking the candidate configuration time with the minimum value among all candidate configuration times as the safe configuration time.

3. The method according to claim 2, characterized in that, The multiple instantaneous risk sub-indicators include: the frequency of damage to the generally used reactor core and the frequency of early large-scale radioactive releases. The cumulative risk indicator corresponding to the frequency of damage to the generally used reactor core is the probability increment of damage to the generally used reactor core, and the cumulative risk indicator corresponding to the frequency of early large-scale radioactive releases is the probability increment of early large-scale radioactive releases.

4. The method according to claim 1, characterized in that, The step of determining the routine operation specifications of the nuclear power plant based on the safety configuration time and safety configuration operation includes: determining a limit matrix based on the limit conditions corresponding to each operating system in each operating mode; and for any operating system, associating the safety configuration time and safety configuration operation corresponding to that operating system with the limit matrix to obtain the routine operation specifications of the nuclear power plant.

5. The method according to claim 1, characterized in that, The method further includes: if the number of operating systems whose operating parameters do not meet the corresponding limit conditions reaches the emergency configuration condition, then determining the emergency configuration operation and emergency configuration time corresponding to the emergency configuration condition; and determining the emergency operation specifications of the nuclear power plant based on the emergency configuration time and emergency configuration operation.

6. The method according to claim 1, characterized in that, The database stores the security functions corresponding to each operating system in each operating mode; the limit conditions of any operating system include the operating requirements of the operating devices corresponding to each security function within that operating system.

7. A device for determining the operating technical specifications of a nuclear power plant, characterized in that, The device includes: a retrieval module for retrieving limit conditions corresponding to each operating system within the nuclear power plant from a database; wherein the database stores limit conditions for each operating system under various operating modes obtained through offline analysis of nuclear power plant safety analysis results, transient analysis results, operating mode classification, and regulatory standards; an acquisition module for acquiring operating parameters of each operating system within the nuclear power plant under the current operating mode; and an analysis module. This module is used to determine the risk indicators of the nuclear power plant when the operating parameters of any operating system do not meet the limit conditions corresponding to the current operating mode, based on the operating status of the nuclear power plant. The limit conditions for any operating system are used to limit the operating status of each operating device related to safety functions within the operating system under the corresponding operating mode. The risk indicators include instantaneous risk indicators; instantaneous risk refers to the risk level value calculated under a specific nuclear power plant configuration. A configuration module is used to determine a safe configuration time based on the integral relationship between the instantaneous risk indicator and the corresponding cumulative risk indicator threshold. The cumulative risk indicator describes the cumulative effect of risk within a time period. The safe configuration time is compared with each preset cutoff time to obtain a comparison result. Each cutoff time corresponds to a candidate configuration operation. A safe configuration operation is determined from the candidate configuration operations based on the comparison result. A generation module is used to determine the normal operating specifications of the nuclear power plant based on the safe configuration time, the safe configuration operation, and the limit condition list retrieved from the generation module.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the method of any one of claims 1 to 6.

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