WANO chemical index calculation method and system for pressurized water reactor nuclear power plant

Abstract

The invention relates to the technical field of nuclear power plant engineering, and discloses a WANO chemical index calculation method and system for a pressurized water reactor nuclear power plant, and the method comprises the steps: obtaining the chemical parameters and operation state of a nuclear power plant; determining WANO chemical index calculation logic, and calculating WANO chemical indexes according to the chemical parameters; and triggering an abnormal alarm according to the WANO chemical index. The method is suitable for different reactor types and working conditions, has wide applicability, solves the problem of false alarm or missing alarm in a fixed limit value mode, provides accurate operation guidance for operators, reduces the operation risk, improves the operation and maintenance efficiency, fills the blank of insufficient combination of dynamic adjustment and working conditions in the prior art, and improves the operation and maintenance efficiency. And the method has remarkable innovativeness and practical engineering value.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant engineering, and particularly to a method and system for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant. Background Art

[0002] The WANO performance indicators provide a unified standard for performance exchanges among nuclear power plants, and through the WANO performance indicators, the exchange of operating experience information among power plants can be promoted. The performance indicators of WANO encourage power plants to pursue excellent performance in the industry and inspire power plants to search for and exchange good experiences in nuclear power operation.

[0003] Chemical indicators can reflect the effectiveness of chemical control in the power station. Different systems are selected according to different reactor types, different steam generator types, and different chemical control modes, and then the chemical indicators are calculated based on the concentrations of important impurities and corrosion products in these systems. For pressurized water reactor units, the focus is on the secondary loop system. These important chemical parameters are synthesized into a single chemical indicator, and through this chemical indicator, the effectiveness of the entire chemical control in the power station can be reflected. Summary of the Invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by the present invention is:

[0006] To solve the above technical problem, the present invention provides the following technical solution: A method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant, including: obtaining the chemical parameters and operating status of the nuclear power plant;

[0007] Determining the calculation logic of WANO chemical indicators, and calculating WANO chemical indicators according to the chemical parameters;

[0008] Triggering an abnormal alarm according to the WANO chemical indicators.

[0009] As a preferred solution of the method for calculating WANO chemical indicators of the pressurized water reactor nuclear power plant described in the present invention, wherein: the acquisition range of the chemical parameters is dynamically determined according to the type of nuclear power plant and the operating conditions, and the real-time operating data of the nuclear power plant is collected by the on-line monitoring equipment of the nuclear power plant as the chemical parameters.

[0010] As a preferred solution of the method for calculating WANO chemical indicators of the pressurized water reactor nuclear power plant described in the present invention, wherein: the calculation logic of the WANO chemical indicators includes the basic logic for calculating chemical indicators and the dynamic parameter adjustment logic.

[0011] As a preferred embodiment of the method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant according to the present invention, wherein: the dynamic parameter adjustment logic includes obtaining the dynamic adjustment range of chemical parameters according to the chemical parameters and the real-time operating status of the nuclear power plant.

[0012] As a preferred embodiment of the method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant according to the present invention, wherein: the abnormal alarm includes real-time trend analysis and multi-threshold classification alarm. The real-time trend analysis is based on the historical and real-time data of WANO chemical indicators to predict abnormal change trends;

[0013] The multi-threshold classification alarm triggers alarm signals at different levels according to the degree of deviation of chemical indicators from the normal range.

[0014] As a preferred embodiment of the method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant according to the present invention, wherein: the nuclear power plant includes, but is not limited to, a pressurized water reactor nuclear power plant, and the chemical parameters include chloride ions in the blowdown water of the steam generator, sulfate ions in the blowdown water of the steam generator, sodium ions in the blowdown water of the steam generator, iron ions in the feed water, dissolved oxygen in the condensate water, and cation conductivity of the blowdown water of the steam generator.

[0015] As a preferred embodiment of the method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant according to the present invention, wherein: the dynamic adjustment range of the chemical parameters includes setting an initial baseline range of the chemical parameters according to the design parameters of the pressurized water reactor nuclear power plant;

[0016] Dividing the operating status of the pressurized water reactor nuclear power plant into different working conditions, collecting key operating information affecting chemical parameters in real time, obtaining a state factor in combination with an operation strategy, and obtaining an influence coefficient of each state factor on the chemical parameters according to the influence degree of the state factor on the chemical parameters;

[0017] Define a dynamic correction function for each chemical parameter, and obtain a dynamic limit value according to the correction function, expressed as:

[0018]

[0019] Wherein, Represents the dynamic limit value; Represents the initial baseline range; m represents the total number of state factors; w k Represents the weight coefficient; Φ k Represents the dynamic correction function; ΔY k (t) represents the state factor.

[0020] A system for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant using any of the methods of the present invention, wherein: a collection module, which collects the operating status and chemical parameters of the nuclear power plant in real time through on-line monitoring equipment;

[0021] A calculation module, which determines the WANO chemical index calculation logic according to the collected chemical parameters and real-time operating status, and calculates the WANO chemical index based on the chemical parameters;

[0022] A response module, which visually displays the WANO chemical index and triggers an abnormal alarm according to the WANO chemical index.

[0023] A computer device, comprising: a memory and a processor; the memory stores a computer program, including: when the processor executes the computer program, the steps of the method described in any one of the present inventions are implemented.

[0024] A computer-readable storage medium, on which a computer program is stored, including: when the computer program is executed by a processor, the steps of the method described in any one of the present inventions are implemented.

[0025] The beneficial effects of the present invention: Through the dynamic parameter adjustment logic, the method of the present invention dynamically adjusts the limit range of chemical parameters according to the real-time operating status and chemical parameter changes of the nuclear power plant, improving the accuracy and flexibility of chemical index calculation; combined with real-time trend analysis and multi-threshold hierarchical alarm mechanism, it can not only sensitively capture abnormal changes and trigger hierarchical alarms, but also predict potential risks based on historical and real-time data, enhancing the ability of fault prediction. This method is applicable to different reactor types and operating conditions, has wide applicability, solves the problems of false alarms or missed alarms in the fixed limit mode, provides accurate operation guidance for operators, reduces operation risks and improves operation and maintenance efficiency. At the same time, it fills the gap in the lack of combination of dynamic adjustment and operating conditions in the existing technology, and has significant innovation and practical engineering value. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is the overall flowchart of a method for calculating WANO chemical indexes of a pressurized water reactor nuclear power plant provided by an embodiment of the present invention. Detailed Embodiments

[0028] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1. Referring to Figure 1 , which is an embodiment of the present invention, a method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant is provided, including:

[0030] S1: Obtain the chemical parameters and operating status of the nuclear power plant.

[0031] In an embodiment of the present invention, the nuclear power plant includes, but is not limited to, a pressurized water reactor nuclear power plant, and the chemical parameters include chloride ions in the steam generator blowdown water, sulfate ions in the steam generator blowdown water, sodium ions in the steam generator blowdown water, iron ions in the feed water, dissolved oxygen in the condensate, and cation conductivity of the steam generator blowdown water.

[0032] Specifically, the chemical parameters are obtained through an online monitoring system and periodic sampling analysis. The online monitoring system usually includes sensors installed at key positions such as the primary loop, feed water pipeline, and cooling water system. These sensors can collect chloride ions, sulfate ions, sodium ions, iron ions, dissolved oxygen, cation conductivity, etc. in real time, providing high-frequency and high-precision chemical parameter data; while periodic sampling analysis can be carried out by a chemical laboratory to conduct more refined detection on the samples, forming a data redundancy and verification mechanism to ensure the accuracy of the parameters.

[0033] Meanwhile, the operating status data of the nuclear power plant are obtained in real time by an industrial control system, an automation system, or a data information management platform, including reactor power, primary loop temperature, steam generator pressure, feed water flow rate, and working parameters of other auxiliary systems. These information represent the dynamic working conditions and operating characteristics of the nuclear power plant, and are used to comprehensively evaluate the change trends of chemical parameters under different load levels or different working conditions.

[0034] In another embodiment of the present invention, the nuclear power plant may also be a boiling water reactor nuclear power plant, and the chemical parameters can be obtained through on-line monitoring equipment and regular sampling and analysis systems installed in key circuits. The on-line monitoring equipment is installed in the main cooling circuit, condenser outlet and steam-water separation equipment of the boiling water reactor, and is used to collect key chemical parameters such as chloride ions, sulfate ions, sodium ions, dissolved oxygen, hydrogen ion concentration (pH) and total organic carbon (TOC) in real time. These parameters can reflect the accumulation of impurities, the change of corrosion environment and the effect of water quality control in the boiling water reactor circuit. The high-frequency data collected in real time is transmitted to the central monitoring system through the digital monitoring platform, which is convenient for the operation personnel to quickly master the water chemistry state.

[0035] In addition, considering the characteristics of the boiling water reactor nuclear power plant, special attention is paid to the chemical monitoring of the condensate circuit. For example, by monitoring the dissolved oxygen and sulfate ion concentration in the condenser, the risk of secondary side cooling water leakage or impurity introduction is analyzed; the monitoring data of the steam-water separator is used to evaluate the steam purity and prevent corrosive substances from entering the turbine and affecting the operation safety.

[0036] S2: Determine the WANO chemical index calculation logic and calculate the WANO chemical index according to the chemical parameters.

[0037] Furthermore, according to the design characteristics of the nuclear power plant (such as the pressurized water reactor type and the heat transfer tube material) and the operation requirements, the WANO chemical index calculation logic applicable to the nuclear power plant is defined. The WANO chemical index calculation logic includes the basic logic of chemical index calculation and the dynamic parameter adjustment logic.

[0038] In one embodiment of the present invention, the basic logic of the chemical index calculation adopts a standardized weighted formula to calculate the WANO chemical index based on chemical parameters, including the collected values of chemical parameters, the corresponding weights and the set limits; the dynamic parameter adjustment logic is to obtain the dynamic adjustment range of chemical parameters according to the chemical parameters and the real-time operation state of the nuclear power plant.

[0039] In one embodiment of the present invention, the basic logic of the WANO chemical index calculation can be calculated according to the weighted value and limit of the chemical parameters. The calculation method of the quarterly index is expressed as:

[0040]

[0041] Where K n represents the WANO chemical index in the nth quarter; x i (t) represents the i-th chemical parameter; w i represents the weight parameter; i represents the total number of chemical parameters; LVx i(t) represents the limit value of the i-th chemical parameter. If the weighted value of the sample is less than the limit value, the limit value is automatically taken; if the weighted value of the sample is greater than the limit value, the weighted value of the sample is taken.

[0042] The chemical indicators of the current year are expressed as:

[0043]

[0044] Among them, K represents the current chemical indicator; d n represents the number of days in the n-th quarter when the generator power is greater than or equal to 30%.

[0045] Furthermore, the dynamic adjustment range of the chemical parameter includes setting the initial baseline range of each first chemical parameter (such as chloride ion, sulfate ion, sodium ion, iron ion, dissolved oxygen, cation conductivity, etc.) according to the standard requirements of WANO chemical indicators, industry specifications, and the design parameters of the nuclear power plant.

[0046] The operating state of the pressurized water reactor nuclear power plant is divided into different operating conditions, and key operating information affecting chemical parameters (such as primary loop temperature, steam generator pressure, feed water flow rate, and other key process parameters) is collected in real time, and several state factors are formed in combination with operating factors such as system chemical dosing strategy and sewage control method.

[0047] A dynamic correction function based on the baseline range and combined with the influence coefficient of the state factor is established to appropriately adjust the upper and lower limits of the chemical parameter. The dynamic limit value is obtained according to the dynamic correction function, which is expressed as:

[0048]

[0049] Among them, represents the dynamic limit value; represents the initial baseline range; m represents the total number of state factors; w k represents the weight coefficient; Φ k represents the dynamic correction function; ΔY k (t) represents the state factor.

[0050] It should be noted that the state factors include, but are not limited to, the difference between the current temperature and the reference temperature of the steam generator, the difference between the current pressure and the reference pressure of the steam generator, the difference between the water chemistry pH and the reference pH, the difference between the feed water or condensate conductivity and the reference conductivity, and the ratio of the current thermal power of the unit to the rated power.

[0051] In another embodiment of the present invention, the basic logic for calculating the chemical indicator can also be a method based on grouped evaluation of chemical parameters and weighted summary of key indicators. Specifically, taking a boiling water reactor nuclear power plant as an example, the chemical parameters are divided into different categories:

[0052] Corrosion control parameters, such as dissolved oxygen, chloride ions, and sulfate ions in cooling water;

[0053] Water quality purity parameters, such as sodium ions, total organic carbon (TOC), and cation conductivity in main steam and condensate;

[0054] Key process indicators: such as steam-water separation efficiency and steam drum water level.

[0055] Evaluate the grouped parameters group by group. By calculating the grouped weighted values of each group of chemical parameters, the corresponding grouped chemical indicators are obtained. All the grouped chemical indicators are weighted and summarized according to the set weight parameters, and finally the comprehensive chemical indicator of the current quarter is calculated.

[0056] Furthermore, the dynamic correction function is determined according to the chemical parameter characteristics of the nuclear power plant. In an embodiment of the present invention, the dynamic correction function Φ k (ΔY k (t)) can be calculated by simple linear summation and is expressed as:

[0057]

[0058] where ΔT represents the difference between the current temperature and the reference temperature of the steam generator; Δp represents the difference between the current pressure and the reference pressure of the steam generator; k i1 , k i2 ,... represent the sensitivity coefficients of the state factors for chemical parameters; T0 represents the baseline temperature; p0 represents the baseline pressure.

[0059] In another embodiment of the present invention, when the chemical parameters of the nuclear power plant are parameters with small-range variations, the dynamic correction function can be calculated in logarithmic form and is expressed as:

[0060] Φ k (ΔY k ) = γ k ·ln(1 + ΔY k )

[0061] where Φ k (ΔY k ) represents the dynamic correction function of the kth state factor; γ k represents an adjustable weight parameter.

[0062] S3: Trigger an abnormal alarm according to the WANO chemical indicator.

[0063] Furthermore, for WANO chemical indicators, multiple levels of threshold intervals (such as normal, warning, severe, etc.) are defined in advance. The thresholds can be configured according to industry standards, historical experience or dynamic parameter adjustment results. The thresholds can be divided into “T1 <T2<T3”三档,对应不同程度的偏离或风险级别。

[0064] When the WANO chemical index calculated by the system is lower or higher than the set threshold, the deviation range is determined and the corresponding level of alarm is triggered. If the WANO chemical index is within the normal range but its change rate (slope or acceleration) exceeds the set threshold, it can also be regarded as a potential abnormality and trigger an alarm of the early warning level to remind the operating personnel to intervene in advance.

[0065] The system sends alarm information to a centralized monitoring platform or distributed control system (DCS) and distinguishes them with different colors or icons on the human-machine interface (HMI).

[0066] To prevent frequent switching or false alarms, a hysteresis strategy or time sliding window is set. The system will enter the alarm state only when the WANO chemical index exceeds the threshold for a certain period of time. After the index returns to the safe range and stabilizes for a period of time, the alarm will be automatically lifted or a manual reset will be prompted.

[0067] When chemical parameters fluctuate dramatically, a comprehensive analysis of historical data can be used to determine whether the short-term abnormality is caused by a one-time operation (such as sewage discharge or transient drug addition). If it is confirmed to be a normal operation impact, false alarms can be suppressed.

[0068] Example 2, below is an embodiment of the present invention, which provides a method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0069] The pressurized water reactor unit with recirculating steam generator using Incoloy-800 heat transfer tubes needs to collect the following chemical parameters: chloride ions in steam generator wastewater, sulfate ions in steam generator wastewater, sodium ions in steam generator wastewater, iron ions in feed water, dissolved oxygen in condensate water, and cationic conductivity of steam generator wastewater.

[0070] The selection of chemical parameters depends on the type of steam generator in the nuclear power plant and the material of the heat transfer tube. For pressurized water reactor units with non-Incoloy-800 heat transfer tubes, the calculation principle of WANO chemical indicators is the same.

[0071] Indicator calculation:

[0072] Example of initial conditions for Incoloy-800 heat transfer tubes:

[0073]

[0074]

[0075] (1) Calculate the quarterly index, expressed as:

[0076]

[0077] 1) If the weighted value of the sample is less than the limit value, the limit value is automatically taken; if the weighted value of the sample is greater than the limit value, the weighted value of the sample is taken.

[0078] 2) Calculate the daily weighted average value, expressed as:

[0079]

[0080] where V i represents the measured or recorded value of this parameter; T i represents the time interval from this measurement to the next measurement.

[0081] 3) The quarterly weighted value of each parameter is weighted in units of "days".

[0082] (2) The chemical index value for the current year:

[0083] Quarter Chemical index value Number of days with power greater than 30% 1 1.11 90 2 1.05 79 3 No available data 0 (Unit shutdown for refueling) 4 1.00 38

[0084]

[0085] The days when the generator power is less than 30% are automatically excluded from the annual chemical index value. The WANO index collected and calculated by the computer is automatically displayed in a trend on the computer.

[0086] Example 3, in an exemplary embodiment, a WANO chemical index calculation system for a pressurized water reactor nuclear power plant is further provided, including an acquisition module that collects the operating status and chemical parameters of the nuclear power plant in real time through an on-line monitoring device; a calculation module that determines the WANO chemical index calculation logic according to the collected chemical parameters and the real-time operating status, and calculates the WANO chemical index according to the chemical parameters; a response module that visually displays the WANO chemical index and triggers an abnormal alarm according to the WANO chemical index.

[0087] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs, etc., all kinds of media that can store program codes.

[0088] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0089] More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection parts with one or more wirings (electronic devices), portable computer disk cartridges (magnetic devices), random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memories), optical fiber devices, and portable compact disc read-only memories (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, then editing, interpreting, or otherwise processing it as necessary, and then storing it in a computer memory.

[0090] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application specific integrated circuits with suitable combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A calculation method for WANO chemical indicators of a pressurized water reactor nuclear power plant, characterized in that, Including: Obtain the chemical parameters and operating status of the nuclear power plant; Determine the WANO chemical index calculation logic and calculate the WANO chemical index based on the chemical parameters; Trigger an abnormal alarm according to the WANO chemical index.

2. The method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant according to claim 1, wherein: The acquisition range of the chemical parameters is dynamically determined according to the type of nuclear power plant and the operating conditions, and the real-time operating data of the nuclear power plant is collected through the on-line monitoring equipment of the nuclear power plant as the chemical parameters.

3. The method for calculating the WANO chemical index of a pressurized water reactor nuclear power plant according to claim 2, characterized in that: The WANO chemical index calculation logic includes the basic logic of chemical index calculation and the dynamic parameter adjustment logic.

4. The method for calculating the WANO chemical index of a pressurized water reactor nuclear power plant according to claim 3, characterized in that: The dynamic parameter adjustment logic includes obtaining the dynamic adjustment range of the chemical parameters according to the chemical parameters and the real-time operating status of the nuclear power plant.

5. The method for calculating the WANO chemical index of a pressurized water reactor nuclear power plant according to claim 4, wherein: The abnormal alarm includes real-time trend analysis and multi-threshold classification alarm. The real-time trend analysis is based on the historical and real-time data of the WANO chemical index to predict the abnormal change trend; The multi-threshold classification alarm triggers different levels of alarm signals according to the degree of deviation of the chemical index from the normal range.

6. The method for calculating the WANO chemical index of a pressurized water reactor nuclear power plant according to claim 5, wherein: The nuclear power plant includes, but is not limited to, a pressurized water reactor nuclear power plant. The chemical parameters include chloride ions in the blowdown water of the steam generator, sulfate ions in the blowdown water of the steam generator, sodium ions in the blowdown water of the steam generator, iron ions in the feed water, dissolved oxygen in the condensate water, and cation conductivity of the blowdown water of the steam generator.

7. The method for calculating WANO chemical indicators of a pressurized water reactor nuclear power plant according to claim 6, characterized in that: The dynamic adjustment range of the chemical parameters includes setting the initial baseline range of the chemical parameters according to the design parameters of the pressurized water reactor nuclear power plant; Divide the operating status of the pressurized water reactor nuclear power plant into different operating conditions, collect the key operating information affecting the chemical parameters in real time, obtain the state factor by combining the operation strategy, and obtain the influence coefficient of each state factor on the chemical parameters according to the influence degree of the state factor on the chemical parameters; Define a dynamic correction function for each chemical parameter, and obtain the dynamic limit value according to the correction function, expressed as: Among them, represents the dynamic limit value; represents the initial baseline range; m represents the total number of state factors; w k represents the weight coefficient; Φ k represents the dynamic correction function; ΔY k( t ) represents the state factor.

8. A pressurized water reactor nuclear power plant WANO chemical index calculation system using the method described in any one of claims 1-7, characterized in that, Including, An acquisition module that collects the operating status and chemical parameters of the nuclear power plant in real time through on-line monitoring equipment; A calculation module that determines the WANO chemical index calculation logic according to the collected chemical parameters and real-time operating status, and calculates the WANO chemical index according to the chemical parameters; A response module that visually displays the WANO chemical index and triggers an abnormal alarm according to the WANO chemical index.

9. A computer device, comprising: A memory and a processor; The memory stores a computer program, characterized in that: when the processor executes the computer program, the steps of the WANO chemical index calculation method for a pressurized water reactor nuclear power plant as described in any one of claims 1-7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the steps of the WANO chemical index calculation method for a pressurized water reactor nuclear power plant as described in any one of claims 1-7 are implemented.

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