A method for defining a standard granularity of an instrument control system of a nuclear power plant

Abstract

This invention belongs to the technical field of defining the standard requirements for nuclear power plant instrumentation and control systems, specifically relating to a method for defining the granularity of standards for nuclear power plant instrumentation and control systems. It establishes a two-dimensional analysis framework, determining the elements of the first dimension by decomposing them according to the relevant activity types of the system and equipment throughout the entire lifecycle of the nuclear power plant; determining the elements of the second dimension by decomposing them according to the dimensions of typical instrumentation and control system signal flows; integrating the collected information into a coherent standard system, defining specific standards for each activity stage and signal flow link, ensuring seamless integration between them, and ensuring that changes in one area do not negatively impact other areas; establishing a continuous improvement and feedback mechanism, periodically evaluating the effectiveness and applicability of the standards and adjusting them as needed. This invention ensures the reliable and economical operation of nuclear power plant units.

Description

Technical Field

[0001] This invention belongs to the technical field of defining the standard requirements of nuclear power plant instrumentation and control systems, and specifically relates to a method for defining the granularity of standards for nuclear power plant instrumentation and control systems. Background Technology

[0002] The nuclear power plant reactor instrumentation and control system (APC) consists of a specialized control system and various complex measuring instruments. The measuring instruments are responsible for monitoring and collecting basic parameters, while the control system is responsible for data collection, analysis, and visualization. The APC is a crucial central nervous system of the nuclear power plant, exhibiting high complexity and technical difficulty. The design, manufacturing, testing, on-site installation, commissioning, operation, and maintenance of the APC and its equipment must all adhere to relevant standards. The reliability and economical operation of a nuclear power plant unit largely depend on the clarity of the APC standard requirements. However, currently, there is a problem of unclear standard adoption requirements. Therefore, it is necessary to design a specific and feasible method to conduct requirements analysis of relevant standards for the nuclear power plant APC, in order to achieve standard adoption and benchmarking analysis, ensuring that the adoption of standards throughout the entire lifecycle of nuclear power plant APC and equipment is based on sound principles and carried out efficiently and stably.

[0003] The complexity and technical difficulty of nuclear power plant reactor instrumentation and control systems are mainly reflected in the following aspects:

[0004] a. Complexity of measuring instruments: Nuclear power plant reactor instrumentation and control systems need to measure and monitor a variety of basic parameters, including temperature, pressure, and flow rate. These parameters require the use of different measuring instruments, which need to be calibrated and verified to ensure their accuracy and reliability.

[0005] b. Complexity of the control system: The control system of a nuclear power plant reactor instrumentation and control system needs to collect, process, and analyze large amounts of data, and use this data to control the operation of the reactor. This data needs to meet high requirements in terms of real-time performance, accuracy, reliability, and visualization.

[0006] c. Complexity of Design, Manufacturing, Testing, On-site Installation, Commissioning, and Maintenance: The various devices in a nuclear power plant reactor instrumentation and control system require complex design, manufacturing, and testing. On-site installation and commissioning also require a high level of technical expertise. Furthermore, regular maintenance and overhauls are necessary to ensure the system's reliability and safety. Summary of the Invention

[0007] The purpose of this invention is to provide a method for defining the standard granularity of the instrumentation and control system of a nuclear power plant, so as to ensure the reliable and economical operation of nuclear power plant units.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A method for defining the granularity of standards for nuclear power plant instrumentation and control systems is proposed. This method establishes a two-dimensional analysis framework, defining the elements of the first dimension by decomposing the relevant activity types of the system and equipment throughout the entire lifecycle of the nuclear power plant; defining the elements of the second dimension by decomposing them according to the signal flow dimensions of a typical instrumentation and control system; integrating the collected information into a coherent standard system, defining specific standards for each activity stage and signal flow link to ensure seamless integration between them and to ensure that changes in one area do not negatively impact other areas; and establishing a continuous improvement and feedback mechanism to periodically evaluate the effectiveness and applicability of the standards and adjust them as needed.

[0010] The relevant activities of systems and equipment throughout the entire life cycle of a nuclear power plant include design, manufacturing, testing, on-site installation, commissioning and operation, and maintenance. Each stage needs to be documented in detail, and the corresponding standards and requirements need to be determined.

[0011] Design: This stage involves developing detailed engineering drawings and technical specifications, and determining the system's design benchmarks and performance indicators.

[0012] Manufacturing: In this stage, the manufacturer produces the required components according to the design documents.

[0013] Testing: This includes pre-shipment testing and on-site functional testing to verify whether the equipment meets the design requirements.

[0014] On-site installation: This involves transporting the equipment to the site and installing it according to the drawings.

[0015] Commissioning and Operation: During this stage, the equipment will be started up and subjected to a series of tests to confirm that its operation meets expectations.

[0016] Maintenance: Covers the regular inspection, repair, and upgrade activities of equipment throughout its use.

[0017] The signal flow dimensions of a typical instrumentation and control system include signal sensing, transmission, measurement, processing, and calculation, with further refinement of standard requirements based on the direction of the signal flow.

[0018] Signal sensing: Identifying the location and function of sensors and other input devices; Signal transmission: Analyzing how signals are transmitted from a source to a receiver via physical or logical channels; Signal measurement: Evaluating methods for detecting signal strength and quality; Signal processing: Exploring how raw data can be transformed to suit different application requirements; Signal computation: Considering algorithms and techniques for data analysis and decision support.

[0019] The beneficial effects achieved by this invention are as follows:

[0020] First, this method analyzes the standard system of instrumentation and control systems in nuclear power plants, which can effectively solve the current problem of unclear adoption requirements, significantly improve the clarity of standard requirements, and ensure the quality, authority and operability of the standards.

[0021] Secondly, compared with traditional methods such as the preferred module for the instrumentation and control system of nuclear power plants, the preferred module for the interlocking control of the instrumentation and control system of nuclear power plants, the method for confirming the applicability of commercial items in the system, and the particle size sampling and measurement system and method, this method is more professional and technical, and can more accurately define the standard particle size.

[0022] In addition, this method is highly operable and can provide specific and feasible solutions for the adoption and benchmarking analysis of standards for nuclear power plant instrumentation and control systems. It helps to ensure that the adoption of standards for nuclear power plant instrumentation, control and equipment throughout their entire life cycle is based on evidence and carried out efficiently and stably.

[0023] In summary, the two-dimensional granularity definition method provided by this invention can effectively improve the clarity and operability of the standard requirements for the instrumentation and control system of nuclear power plants, which is conducive to ensuring the reliable and economical operation of nuclear power plant units and has significant economic and social benefits. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a standard granularity definition method for instrumentation and control systems in nuclear power plants. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] The standard granularity definition method mainly clarifies the scope and purpose of standard requirements from two dimensions, such as Figure 1 The two-dimensional granularity definition diagram is shown below. To ensure the efficient operation and reliable safety of the instrumentation and control systems in nuclear power plants, this method not only requires accurately defining the scope and objectives of standard requirements, but also needs to consider the various activities and components of the nuclear power plant's instrumentation and control systems throughout their entire lifecycle. The specific implementation steps of this method will be described in detail below.

[0027] 1. Establish a two-dimensional analysis framework. First, a multi-dimensional analysis framework needs to be built to support all subsequent work. This includes, but is not limited to, a comprehensive review of the nuclear power plant's lifecycle activities and an in-depth analysis of the signal flow of the instrumentation and control system. This stage requires the joint participation of instrumentation and control engineers, system analysts, quality assurance experts, and project managers to ensure that the analysis framework is both comprehensive and detailed.

[0028] 2. Identify the elements of the first dimension. The first dimension is decomposed based on the types of relevant activities of the system and equipment throughout the entire lifecycle of the nuclear power plant. "Relevant activities of the system and equipment throughout the entire lifecycle of the nuclear power plant" needs to identify all relevant activities. These activities include, but are not limited to, the following key phases:

[0029] Design: This stage involves developing detailed engineering drawings and technical specifications, and determining the system's design benchmarks and performance indicators.

[0030] Manufacturing: At this stage, the manufacturer produces the required components according to the design documents.

[0031] Testing: This includes pre-shipment testing and on-site functional testing to verify whether the equipment meets the design requirements.

[0032] On-site installation: This involves transporting the equipment to the site and installing it according to the drawings.

[0033] Commissioning and Operation: During this process, the equipment will be started up and subjected to a series of tests to confirm that its operation meets expectations.

[0034] Maintenance: Covers the regular inspection, repair, and upgrade activities of equipment throughout its use.

[0035] Each stage needs to be documented in detail, and corresponding standards and requirements need to be defined.

[0036] 3. Determine the elements of the second dimension. Decompose the signal flow according to the dimensions of a typical instrumentation and control system (including signal sensing, transmission, measurement, processing, and calculation). Further refine the standard requirements based on the direction of the signal flow. This step requires a clear understanding of the entire path of the signal from its source to its destination. Specific steps include:

[0037] Signal sensing: Identifying the location and function of sensors and other input devices.

[0038] Signal transmission: Analyzing how signals are transmitted from the source to the receiver through physical or logical channels.

[0039] Signal measurement: methods for evaluating the strength and quality of signals used in detection.

[0040] Signal Processing: Exploring how to transform raw data to suit different application requirements.

[0041] Signal computation: Consider algorithms and techniques used for data analysis and decision support.

[0042] 4. Standardized requirements integration

[0043] With the first three steps completed, the next task is to integrate the collected information into a coherent set of standards. This involves defining specific standards for each activity stage and signaling flow link, and ensuring seamless integration between them. Furthermore, it's necessary to consider the interdependencies between standards to ensure that changes in one area do not negatively impact other areas.

[0044] 5. Continuous improvement and feedback mechanism

[0045] A continuous improvement and feedback mechanism should be established to regularly assess the effectiveness and applicability of the standards and adjust them in a timely manner according to technological advancements and changes in social needs. Furthermore, stakeholder participation is necessary in this process.

[0046] By following the detailed implementation steps outlined above, instrumentation engineers can effectively define standard requirements, thus providing a solid foundation for the safe operation of nuclear power plants. This approach not only helps improve efficiency but also enables them to remain competitive in a constantly evolving technological environment.

[0047] The instrumentation and control system is a crucial central nervous system of a nuclear power plant. The design, manufacturing, and testing of its equipment must all comply with and reference relevant standards. The reliable and economical operation of nuclear power plant units largely depends on the clarity of the standard requirements for the instrumentation and control system. The two-dimensional standard granularity definition method proposed in this invention analyzes the system and equipment throughout the entire life cycle of the nuclear power plant and the standard requirements for the constituent components of the instrumentation and control equipment. Applied to the instrumentation and control standard system of nuclear power plants, it can significantly improve the quality, authority, and operability of the standards compared with traditional methods.

[0048] The invention focuses on a granular definition method for instrumentation and control (ADC) standards in nuclear power plants. The first dimension is the constituent items of the ADC system. This is decomposed according to the signal flow dimensions of a typical ADC system (including signal sensing, transmission, measurement, processing, and calculation). The second dimension is the activities throughout the ADC system's lifecycle, including design, manufacturing, testing, field installation, commissioning, and maintenance. This decomposition method is used to classify ADC standards and to establish an ADC standards system.

Claims

1. A method for defining the granularity of standards in a nuclear power plant instrumentation and control system, characterized in that: Establish a two-dimensional analysis framework, identifying the elements of the first dimension by decomposing the relevant activity types of systems and equipment throughout the entire lifecycle of a nuclear power plant; identify the elements of the second dimension by decomposing them according to the signal flow of a typical instrumentation and control system; integrate the collected information into a coherent standard system, defining specific standards for each activity stage and signal flow link to ensure seamless integration between them and to ensure that changes in one area do not negatively impact other areas; establish a continuous improvement and feedback mechanism to regularly evaluate the effectiveness and applicability of the standards and adjust them as needed.

2. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 1, characterized in that: The relevant activities of systems and equipment throughout the entire life cycle of a nuclear power plant include design, manufacturing, testing, on-site installation, commissioning and operation, and maintenance. Each stage needs to be documented in detail, and the corresponding standards and requirements need to be determined.

3. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 2, characterized in that: Design: This stage involves developing detailed engineering drawings and technical specifications, and determining the system's design benchmarks and performance indicators.

4. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 2, characterized in that: Manufacturing: In this stage, the manufacturer produces the required components according to the design documents.

5. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 2, characterized in that: Testing: This includes pre-shipment testing and on-site functional testing to verify whether the equipment meets the design requirements.

6. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 2, characterized in that: On-site installation: This involves transporting the equipment to the site and installing it according to the drawings.

7. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 2, characterized in that: Commissioning and Operation: During this stage, the equipment will be started up and subjected to a series of tests to confirm that its operation meets expectations.

8. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 2, characterized in that: Maintenance: Covers the regular inspection, repair, and upgrade activities of equipment throughout its use.

9. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 1, characterized in that: The signal flow dimensions of a typical instrumentation and control system include signal sensing, transmission, measurement, processing, and calculation, with further refinement of standard requirements based on the direction of the signal flow.

10. The method for defining the standard granularity of nuclear power plant instrumentation and control systems according to claim 9, characterized in that: Signal sensing: Identifying the location and function of sensors and other input devices; Signal transmission: Analyzing how signals are transmitted from a source to a receiver via physical or logical channels; Signal measurement: Evaluating methods for detecting signal strength and quality; Signal processing: Exploring how raw data can be transformed to suit different application requirements; Signal computation: Considering algorithms and techniques for data analysis and decision support.

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