Nuclear reactor model technology development method based on system engineering theory

Abstract

The invention relates to the technical field of nuclear reactors, in particular to a nuclear reactor model technology development method based on a system engineering theory, which comprises the following steps: S1, determining a power plant technology state and an acceptance criterion thereof; a power plant is divided into multiple stages of systems, and the systems have different design priorities; s2, according to the sequence of the design priorities from high to low, designing and decomposing the systems in sequence to determine the system technology state and acceptance criteria corresponding to each system; wherein in the process of designing and decomposing each system, the function, performance and interface requirements of all subordinate systems with lower design priority than the system are provided; designing and decomposing the system according to the technical state of the power plant and the function, performance and interface requirements proposed by all superior systems; s3, verifying the systems in sequence according to the design priorities from low to high; and verifying the power plant after each system verifies to ensure that the technical state and acceptance criterion requirements of the power plant are met.

Description

Technical Field

[0001] The present application relates to the field of nuclear reactor technology, and in particular to a nuclear reactor model technology development method based on system engineering theory. Background Art

[0002] This section of content merely provides background information related to the present application and does not necessarily constitute prior art.

[0003] The design of traditional domestic nuclear power plants mostly adopts methods such as "technology introduction" and "reference power plant". As the demand for independence continues to increase, how to carry out forward design of new nuclear reactors has become an urgent problem to be solved. Summary of the invention

[0004] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0005] In view of the above problems, the present application provides a nuclear reactor model technology development method based on system engineering theory, including: S1, analyzing the power supply and heating capacity requirements of the nuclear reactor to determine the technical status of the power plant and its acceptance criteria; wherein, in the technical status of the power plant, the power plant is divided into multiple systems, and the multiple systems have different design priorities; S2, designing and decomposing each system in order from high to low design priority to determine the system technical status and acceptance criteria corresponding to each system; wherein, in the process of designing and decomposing each system, the function, performance and interface requirements of all lower-level systems with lower design priority than the system are proposed; and the system is designed and decomposed according to the technical status of the power plant and the function, performance and interface requirements proposed by all upper-level systems;

[0006] S3. In order of design priority from low to high, each system shall be verified in accordance with the corresponding system technical status and acceptance criteria to ensure that the requirements of the technical status and acceptance criteria of each level of the system are met; after the verification of all systems is completed, the power plant shall be verified in accordance with the technical status of the power plant and its acceptance criteria to ensure that the requirements of the technical status and acceptance criteria of the power plant are met.

[0007] The embodiment of the present application provides a nuclear reactor model technology development method based on system engineering theory. The method divides the power plant into multiple systems with different design priorities, designs and decomposes each system in order from high to low design priority, and in the process of designing and decomposing each system, proposes the functions, performance and interface requirements of all subordinate systems with lower design priority than the system; and designs and decomposes the system according to the technical status of the power plant and the functions, performance and interface requirements proposed by all superior systems, so that the system design input is complete and accurate, and the process of forward designing the system is more logical, which is beneficial to reducing the design time while enabling each system to meet the functions, performance and interface requirements of the superior system, so that the designed reactor is safer and more reliable.

[0008] The nuclear reactor model technology development method based on system engineering theory provided in the embodiments of the present application provides methodological guidance for the smooth implementation of system design of new nuclear reactors; it is particularly suitable for forward design of a large number of systems with complex interfaces.

[0009] These and other advantages of the present application will become more apparent through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to further illustrate the above and other advantages and features of the present application, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. The accompanying drawings together with the following detailed description are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only describe typical examples of the present application and should not be regarded as limiting the scope of the present application.

[0011] Figure 1 It is a flow chart of a nuclear reactor model technology development method based on system engineering theory according to an embodiment of the present application;

[0012] Figure 2 is a flow chart of a method for designing a nuclear reactor system according to an embodiment of the present application;

[0013] Figure 3 It is a flow chart of a method for forward design of equipment for a nuclear reactor according to an embodiment of the present application.

[0014] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0015] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0016] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0017] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this application should have the common meanings understood by persons with ordinary skills in the field to which this application belongs.

[0018] In the description of the embodiments of the present application, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0019] System engineering is a theoretical method summarized and practiced in the organization, planning, production, management of large-scale complex engineering or economic activities, as well as the design and development of complex products. System engineering is an engineering application technology that provides a positive design logic thinking method to successfully transform user needs into products. By observing the "overall picture" of the system life cycle, guided by the idea of ​​decomposition-integration, integrating multiple professional technologies, and through the iterative process of analysis-synthesis-experimentation, a system that meets the use requirements and optimizes overall performance is developed.

[0020] The development of new nuclear reactor technology is a large and complex project with complex interfaces, high technical difficulty, long R&D time, large R&D funds, and great risks. It is necessary not only to consider how to carry out the engineering design, but also to plan the corresponding many R&D, testing, and verification projects, and to repeatedly iterate and adjust between engineering design, R&D, testing, and verification. At the same time, it is also necessary to take into account the requirements of quality, safety, progress, investment, etc. This places extremely high demands on engineering technology development and engineering project management.

[0021] The classical system engineering theory is relatively macroscopic and not targeted enough in guiding the engineering design process of new nuclear reactors.

[0022] The embodiments of the present application provide a nuclear reactor model technology development method based on system engineering theory, which further supplements and refines the classical system engineering theory to provide methodological guidance for the smooth design of new nuclear reactors.

[0023] See also Figure 1 , Figure 1 It is a flow chart of a nuclear reactor model technology development method based on system engineering theory according to an embodiment of the present application.

[0024] The nuclear reactor model technology development method based on system engineering theory provided in the embodiment of the present application may include steps S1 to S3.

[0025] S1. Conduct demand analysis on the power supply and heating capacity requirements of the nuclear reactor to determine the technical status of the power plant and its acceptance criteria; wherein, in the technical status of the power plant, the power plant is divided into multiple systems, each of which has a different design priority.

[0026] S2. Design and decompose each system in order of design priority from high to low to determine the system technical status and acceptance criteria corresponding to each system; in the process of designing and decomposing each system, propose the functions, performance and interface requirements of all subordinate systems with lower design priority than the system; and design and decompose the system according to the technical status of the power plant and the functions, performance and interface requirements proposed by all superior systems.

[0027] S3. In order of design priority from low to high, each system shall be verified in accordance with the corresponding system technical status and acceptance criteria to ensure that the requirements of the technical status and acceptance criteria of each level of the system are met; after the verification of all systems is completed, the power plant shall be verified in accordance with the technical status of the power plant and its acceptance criteria to ensure that the requirements of the technical status and acceptance criteria of the power plant are met.

[0028] The embodiment of the present application provides a nuclear reactor model technology development method based on system engineering theory. The method divides the power plant into multiple systems with different design priorities, designs and decomposes each system in order from high to low design priority, and in the process of designing and decomposing each system, proposes the functions, performance and interface requirements of all subordinate systems with lower design priority than the system; and designs and decomposes the system according to the technical status of the power plant and the functions, performance and interface requirements proposed by all superior systems, so that the system design input is complete and accurate, and the process of forward design of the system is more logical, which is conducive to reducing the design time while enabling each system to meet the functions, performance and interface requirements of the superior system, so that the designed reactor is safer and more reliable.

[0029] The nuclear reactor model technology development method based on system engineering theory provided in the embodiments of the present application provides methodological guidance for the smooth implementation of system design of new nuclear reactors; it is particularly suitable for forward design of a large number of systems with complex interfaces.

[0030] In the embodiments of the present application, the subordinate system refers to other systems whose design priority is lower than that of the currently designed system; the superior system refers to other systems whose design priority is higher than that of the currently designed system.

[0031] In some embodiments, a multi-level system with different design priorities includes a main system, a dedicated safety system, a first-level auxiliary system, a second-level auxiliary system, and a third-level auxiliary system, and the design priorities of the main system, the dedicated safety system, the first-level auxiliary system, the second-level auxiliary system, and the third-level auxiliary system decrease in sequence. The main system is used to carry the basic functions of nuclear heat generation, main heat transmission, steam power conversion, and power generation. On the basis of the inherent safety of the main system, the dedicated safety system carries the dedicated safety functions of overpressure protection and waste heat discharge. The first-level auxiliary system is an auxiliary system that directly supports the main system and the dedicated safety system. The second-level auxiliary system is a non-process auxiliary system, which is an auxiliary system of the main system, the dedicated safety system, and the first-level auxiliary system. The third-level auxiliary system is a non-process auxiliary system, which is an auxiliary system that provides support for the whole plant system and equipment. The embodiment of the present application divides the power plant into the above-mentioned 5-level system, so that the system design process is more logical, which is conducive to reducing the design time.

[0032] In an embodiment of the present application, before determining the technical status of the power plant and its acceptance criteria, it is necessary to weigh the overall reactor solution, that is, the weighed optimal technical solution for the power plant. The determined technical status of the power plant and its acceptance criteria may be a specific embodiment of the optimal technical solution for the power plant. Accordingly, before determining the system technical status and acceptance criteria corresponding to each system, it is necessary to weigh the system solution, that is, the weighed optimal technical solution for the system; the determined system technical status and acceptance criteria may be a specific embodiment of the optimal technical solution for the system.

[0033] It is easy to understand that if the system being designed is the main system, the functions, performance indicators and interface requirements of the system are all derived from the power plant technical plan; if the system being designed is a subordinate system of other systems, the functions, performance indicators and interface requirements of the system are derived from the power plant technical plan and all superior systems. Specifically, after the technical plan of the system is determined, corresponding technical requirements or functions, performance and interface requirements will be proposed to its subordinate systems, equipment, instrumentation and control, electrical, and public engineering.

[0034] In some embodiments, step S2 may also include steps S2001 to S2005.

[0035] S2001. Design and decompose the main system according to the technical status of the power plant, and determine the functions, performance and interface requirements of the main system for the dedicated safety system, primary auxiliary system, secondary auxiliary system and tertiary auxiliary system.

[0036] S2002. Design and decompose the dedicated safety system based on the technical status of the power plant and the main system's requirements for the functions, performance and interfaces of the dedicated safety system, and determine the functions, performance and interface requirements of the dedicated safety system for the primary, secondary and tertiary auxiliary systems.

[0037] S2003. Based on the technical status of the power plant, the functions, performance and interface requirements of the main system and the dedicated safety system for the first-level auxiliary system, the first-level auxiliary system is designed and decomposed, and the functions, performance and interface requirements of the first-level auxiliary system for the second-level auxiliary system and the third-level auxiliary system are determined.

[0038] S2004. Based on the technical status of the power plant, the functions, performance and interface requirements of the main system, dedicated safety system and the first-level auxiliary system to the second-level auxiliary system, the second-level auxiliary system is designed and decomposed, and the functions, performance and interface requirements of the second-level auxiliary system to the third-level auxiliary system are determined.

[0039] S2005. Design and decompose the third-level auxiliary system according to the technical status of the power plant, the functions, performance and interface requirements of the main system, dedicated safety system, first-level auxiliary system and second-level auxiliary system for the third-level auxiliary system.

[0040] Through this setting, the designed power plant can be made safer and more stable.

[0041] The S3 step may include integrating and verifying the third-level auxiliary system, the second-level auxiliary system, the first-level auxiliary system, the dedicated safety system, and the main system in sequence to ensure that the technical status and acceptance criteria of each level of the system are met; after the verification of all systems is completed, the power plant is verified based on the technical status of the power plant and its acceptance criteria to ensure that the technical status and acceptance criteria of the power plant are met.

[0042] In some embodiments, step S1 includes: S11. Conducting a demand analysis on the power supply and heating capacity requirements of the power plant; S12. Determining the technical requirements definition of the power plant based on the demand analysis results; S13. Conducting a functional analysis of the power plant based on the technical requirements definition of the power plant; S14. Based on the functional analysis results, carrying out power plant plan trade-offs and designs, and proposing research and development items; S15. Determining the technical status of the power plant and its acceptance criteria based on the power plant plan.

[0043] In some embodiments, in step S14, the technical indicators of the power plant are decomposed downward according to the functional analysis results, and the systems corresponding to these functions, performance indicators and interface requirements are configured to form multiple power plant technical solutions; multiple technical solutions are weighed and compared to weigh out the best power plant technical solution; relevant R&D plans are formulated, and R&D experiments are carried out.

[0044] In some embodiments, in step S15, the design is carried out according to the best power plant technical solution, and the functions, performance indicators and interface requirements corresponding to the power plant technical solution are decomposed into the system; the technical status of the power plant and its acceptance criteria are proposed.

[0045] See also Figure 2 , Figure 2 1 is a flow chart of a method for designing a system of a nuclear reactor according to an embodiment of the present application. In some embodiments, in step S2, the process of designing each system includes steps S21 to S29.

[0046] S21. Determine the system's functions, performance indicators and interface requirements based on the power plant's technical status.

[0047] S22. According to the system's functions, performance indicators and interface requirements, the system is decomposed and structured, and the equipment list of the system configuration is determined.

[0048] S23. Based on the system function decomposition and structural configuration, carry out system process principle design, determine the system process principle diagram, and propose the system process design conditions for its equipment.

[0049] S24. According to the system process schematic, carry out equipment process design or selection, determine the equipment operating conditions, equipment process parameters, equipment general diagram and equipment requirements for instrument control electrical.

[0050] S25. Determine the system process flow chart including instrument control points based on the system process schematic, equipment general diagram, system instrumentation and control, and electrical design.

[0051] S26. Based on the overall plant layout and zoning plan, carry out system piping and plant layout, and conduct pipeline mechanical analysis and support and hanger design.

[0052] S27. Carry out plant design based on pipeline and system plant layout.

[0053] S28. Based on the evaluation of equipment functions and performance, comprehensively evaluate whether the system design meets the system's functional and performance indicators and interface requirements from the perspective of functions and performance.

[0054] S29. Determine the system plan, system technical status and acceptance criteria, formulate relevant R&D plans, and carry out R&D tests.

[0055] The embodiments of the present application are mainly based on the forward design method of system engineering and the chemical system design process (the nuclear reactor system design process is similar to the chemical system design process), and combined with the technical characteristics of the new nuclear reactor, a system design method for a new nuclear reactor is summarized as a methodological guide for the system design process. The method provided in the embodiments of the present application is practiced and summarized in the system design process of the sodium-cooled fast reactor, which can provide methodological guidance for the smooth implementation of the system design of the new nuclear reactor.

[0056] Through the above steps S21 to S29, the system design input is complete and accurate, making the system design process more logical, which is conducive to reducing the design time.

[0057] The embodiment of the present application is equivalent to providing a system forward design method, and the above steps S21-S29 are equivalent to the design and decomposition steps in the system forward design; integrating and verifying the system in step S3 is equivalent to the integration and verification steps in the system forward design.

[0058] In some embodiments, in step S21, the functional and performance indicators include function, performance, safety, reliability, maintainability, life, economy, and ergonomics.

[0059] In some embodiments, if the system is a superior system of other subordinate systems, then in step S22, the primary functions, performance and interface requirements of the system for the subordinate systems are also proposed; in step S23, the primary process design conditions of the system for its subordinate systems are also proposed; in step S29, the final functions, performance and interface requirements and final process design conditions of the system for its subordinate systems are also determined. If the system is a subordinate system of other superior systems, in step S21, the functions and performance indicators and interface requirements of the system are determined according to the technical plan of the power plant and the functions, performance and interface requirements of all superior systems; in step S23, the system process principle design is also carried out according to the process design conditions proposed by all superior systems. The embodiments of the present application enable each system to meet the functions, performance and interface requirements of the superior system, making the reactor safer and more reliable.

[0060] In some embodiments, in step S22, the system function decomposition and structural configuration mainly analyzes what system process support is needed to realize the system function, generally including power, source, path, etc., that is, to analyze the system process principle and configure the corresponding execution equipment. The output of the system function analysis and structural configuration is the system configuration list, system process principle diagram, system requirements for equipment functions, performance and interfaces, system requirements for its subordinate systems functions, performance and interfaces, etc.

[0061] The purpose of the system process principle design in step S23 is to complete the system process principle diagram and propose the system's process design conditions for its equipment and its lower-level systems.

[0062] In some embodiments, step S23 includes: S231. Determine the system operating conditions based on the power plant operating conditions and design benchmarks, and propose requirements for the equipment and auxiliary system operating conditions; S232. Carry out steady-state and transient thermal fluid dynamics calculations of the system, give the temperature, pressure, and flow characteristics in the system, and propose system flow resistance, pipe diameter, valve selection, and equipment pressure drop limit requirements; S233. Carry out system insulation and heat dissipation calculations, and propose system heat dissipation, insulation requirements, and electric heating requirements; S234. Complete the system process principle design and determine the system process principle diagram.

[0063] The purpose of equipment process design or selection in step S24 is to determine the equipment process parameters.

[0064] In some embodiments, step S24 includes: S241. Determine the equipment operating condition design according to the system operating condition and equipment design benchmark, and put forward requirements for the lower-level system operating condition; S242. Carry out equipment thermal hydraulic calculations, equipment structural design, determine the equipment structure size, and publish a simplified diagram of the equipment structure; S243. Conduct equipment strength, seismic, stress, and vibration analysis to ensure that the equipment can withstand various operating transients, publish the equipment general drawing, and put forward requirements for the equipment instrumentation and electrical.

[0065] The system process principle design in step S23 and the equipment process design in step S24 are processes of repeated iteration and gradual optimization, with the ultimate goal of achieving optimization of system and equipment process design.

[0066] In some embodiments, step S25 may include: S51. According to the system process schematic diagram and equipment general diagram, combined with the overall layout requirements of the plant, carry out equipment layout and piping design; S52. On the basis of equipment layout and piping design, combined with system instrumentation and electrical design, carry out system layout, and output a system process flow chart containing instrument control points.

[0067] In step S26, according to the overall layout and zoning plan of the plant, the system piping and plant layout are carried out, and the pipeline mechanical analysis and support and hanger design are performed. In some embodiments, step S26 includes: steps S261 to S263. S261. Carry out system piping and plant layout, determine the equipment layout diagram, process piping layout diagram, main cable layout diagram, main ventilation duct layout diagram, and other piping layout diagrams. S262. Carry out system piping mechanical analysis, issue a system piping mechanical analysis report, and propose adjustment requirements for the system layout. S263. Carry out support and hanger design, and determine the support and hanger position diagram.

[0068] In some embodiments, in step S27, the plant design is carried out according to the pipeline and system plant layout, the floor response spectrum, concrete structure, steel structure, general plan and transportation are determined, and funding for civil engineering and ventilation utilities is provided.

[0069] In some embodiments, in step S29, the system technical status items and their acceptance criteria include but are not limited to the system functions, performances, and physical characteristics defined in the "System Design Requirements", "System Process Schematics", "System Operating Conditions Description", "System Process Flowchart", "System Layout Diagram", "Equipment Design Requirements", and "System Acceptance Criteria".

[0070] The system forward design method of the embodiment of the present application can be summarized as a "five-stage nine-step" method. System technology development is carried out in accordance with the "five stages" of main system design and periodic evaluation, dedicated safety system design and periodic evaluation, first-level auxiliary system design and periodic evaluation, second-level auxiliary system design and periodic evaluation, and third-level auxiliary system design and periodic evaluation. The system functions and performance indicators and interface requirements are determined, system function decomposition and structural configuration, system process principle design, equipment process design or selection, system process flow design, pipeline and plant layout, plant design, periodic evaluation, and determination of system technical status items and their acceptance criteria. The system forward design method of the nuclear reactor provided in the embodiment of the present application can provide methodological guidance for the smooth development of the system design of new nuclear reactors; it is particularly suitable for forward design of many systems with a large number and complex interfaces.

[0071] In some embodiments, in step S2, in the design and decomposition of each system, the system is divided into equipment, components, parts and materials in turn, and the design and decomposition of equipment, components, parts and materials are carried out step by step to determine the technical status and acceptance criteria of equipment, the technical status and acceptance criteria of components, the technical status and acceptance criteria of parts, and the technical status and acceptance criteria of materials. In step S3, in the process of verifying each system, the development and feasibility verification of materials, the processing and manufacturing of parts and feasibility verification, the processing and manufacturing of components and feasibility verification, and the processing and manufacturing of equipment and feasibility verification are carried out in turn according to the technical status and acceptance criteria of materials, the technical status and acceptance criteria of parts, the technical status and acceptance criteria of components, and the technical status and acceptance criteria of equipment.

[0072] In some embodiments, the determination of the system technical status and acceptance criteria, equipment technical status and acceptance criteria, component technical status and acceptance criteria, part technical status and acceptance criteria, and material technical status and acceptance criteria can be achieved through steps similar to steps S11 to S15.

[0073] For example, the steps for determining the technical status and acceptance criteria of the system may include: S20001. Conduct a demand analysis on the system; S20002. Determine the technical requirement definition of the system based on the demand analysis results; S20003. Conduct a functional analysis of the system based on the technical requirement definition of the system; S20004. Based on the functional analysis results, carry out system solution trade-offs and designs, and propose research and development items; S20005. Determine the technical status of the system and its acceptance criteria based on the system solution.

[0074] In some embodiments, in step S20004, based on the functional analysis results, the system technical indicators are decomposed downward, and the corresponding equipment to implement these functions and performance indicators and interface requirements is configured to form multiple system technical solutions; multiple technical solutions are weighed and compared to weigh out the best system technical solution; relevant R&D plans are formulated, and R&D experiments are carried out.

[0075] In some embodiments, in step S20005, the design is carried out according to the best system technical solution, and the functions, performance indicators and interface requirements corresponding to the system technical solution are decomposed into the equipment; the system technical status and its acceptance criteria are proposed.

[0076] like Figure 3 As shown, Figure 3 It is a flow chart of a forward design method for a nuclear reactor according to an embodiment of the present application. In steps S2 and S3, each device can be forward designed according to the following forward design method. Specifically, in step S2, the steps of designing and decomposing equipment, components, parts, and materials step by step include: steps S201 to S203; in step S3, the steps of developing materials and feasibility verification, processing and manufacturing of parts and feasibility verification, processing and manufacturing of components and feasibility verification, and processing and manufacturing of equipment and feasibility verification are carried out in sequence, including: steps S204 to S209.

[0077] Specifically, the forward design method for a nuclear reactor provided in an embodiment of the present application may include steps S201 to S209.

[0078] S201. Determine the equipment scheme and general plan based on the system's functions, performance indicators, interface requirements, and operating requirements for the equipment. In the equipment scheme, the equipment is divided into multiple components, and the functions, performance indicators, interface requirements, and operating requirements are decomposed into corresponding components. The system is determined based on the power plant technical plan obtained by analyzing the demand for power supply and heating capacity of the nuclear reactor.

[0079] S202. Determine the component scheme and general drawing according to the functions, performance indicators, interface requirements, and working condition requirements of the equipment for the components. In the component scheme, the components are divided into multiple parts, and the functions, performance indicators, interface requirements, and working condition requirements are decomposed into corresponding parts.

[0080] S203. Determine the parts plan and general drawing based on the functions, performance indicators, interface requirements, and working condition requirements of the components, and decompose the functions and performance indicators into materials.

[0081] S204. Carry out laboratory trial production of materials based on the functional and performance index requirements of parts.

[0082] S205. Conduct technical feasibility evaluation on the materials trial-produced in the laboratory. If the technical evaluation is feasible, carry out laboratory trial production of parts based on the materials trial-produced in the laboratory.

[0083] S206. Conduct a technical feasibility evaluation on the parts trial-produced in the laboratory. If the technical evaluation is feasible, carry out component laboratory trial production based on the parts trial-produced in the laboratory.

[0084] S207. Conduct a technical feasibility evaluation on the components trial-produced in the laboratory. If the technical evaluation is feasible, conduct equipment laboratory trial production based on the components trial-produced in the laboratory to obtain a functional prototype.

[0085] S208. Verify the functional prototype of the equipment, analyze and evaluate the feasibility of the equipment function and performance, determine the technical difficulties and solutions that need to be solved, and carry out key technical research; after solving the key technical problems of the equipment, carry out equipment engineering trial production to obtain an engineering prototype.

[0086] S209. Carry out equipment engineering prototype verification on the engineering prototype to verify whether the equipment functions and performance meet the functional and performance indicators, interface requirements, and working condition requirements proposed by the affiliated system and the superior system; after the equipment engineering prototype verification is passed, carry out equipment engineering production to obtain the equipment product.

[0087] The device design method provided in the embodiment of the present application, through the above-mentioned steps S201 to S209, makes the device design input complete and accurate, makes the device design process more logical, helps to reduce the design time, and avoids design rework or design failure due to incomplete design input.

[0088] The embodiments of the present application are mainly based on the forward design method of system engineering and the traditional mechanical equipment design process, and combined with the technical characteristics of the new nuclear reactor, a forward design method for equipment of the new nuclear reactor is summarized as a methodological guide for the forward design process of the equipment.

[0089] The equipment forward design method provided in the embodiment of the present application can be summarized as a "three-step prototype" method. The equipment technology development is summarized as functional prototype development and verification, engineering prototype development and verification, and equipment production and verification. The development and verification of the three major prototypes all reflect the design and decomposition from equipment, components, parts to materials, and the integration and verification of materials, parts, components, and equipment.

[0090] In the embodiment of the present application, steps S201 to S207 may correspond to the development and verification of functional prototypes; step S208 may correspond to the development and verification of engineering prototypes; and step S209 may correspond to equipment production and verification. Among them, steps S201 to S203 may correspond to the design and decomposition steps in the forward design method; and steps S204 to S207 may correspond to the integration and verification steps of the forward design method.

[0091] The method provided in the embodiments of the present application is practiced and summarized in the equipment design process of a sodium-cooled fast reactor, and can provide methodological guidance for the smooth implementation of equipment design for a new type of nuclear reactor.

[0092] In some embodiments, step S201 includes: S2011, determining the equipment functions and performance indicators, interface requirements, and operating conditions according to the system's functions, performance indicators, interface requirements, and operating conditions; S2012, carrying out equipment operating condition design according to the equipment functions and performance indicators, interface requirements, and operating conditions; S2013, carrying out equipment thermal-hydraulic calculations based on the results of the equipment operating condition design, and preliminarily determining the equipment process parameters; S2014, carrying out equipment structural design based on the results of the equipment operating condition design; S2015, forming an equipment plan and general drawing, and decomposing the functions, performance indicators, interface requirements, and operating conditions into corresponding components.

[0093] In some embodiments, in step S2015, equipment strength, earthquake resistance, stress, vibration and other analyses are carried out; an equipment plan and general diagram are formed, and functions, performance indicators, interface requirements, and operating conditions are decomposed into corresponding components.

[0094] In some embodiments, step S202 includes: S2021. Determine the functions and performance indicators, interface requirements, and operating conditions of components according to the functions, performance indicators, interface requirements, and operating conditions of the equipment; S2022. Carry out component operating condition design according to the functions and performance indicators, interface requirements, and operating conditions of the components; S2023. Carry out thermal and hydraulic calculations of components according to the results of the component operating condition design, and preliminarily determine the process parameters of the components; S2024. Carry out component structural design according to the results of the component operating condition design; S2025. Form a component scheme and general drawing, and decompose the functions, performance indicators, interface requirements, and operating conditions requirements into corresponding parts.

[0095] In some embodiments, in step S2025, component strength, earthquake resistance, stress, vibration and other analyses are carried out; a component plan and general drawing are formed, and functions, performance indicators, interface requirements, and operating conditions requirements are decomposed into corresponding parts.

[0096] In some embodiments, step S203 includes: S2031, determining the functions and performance indicators, interface requirements, and working condition requirements of the part according to the functions, performance indicators, interface requirements, and working condition requirements of the component; S2032, carrying out part working condition design according to the functions and performance indicators and interface requirements of the part; S2033, carrying out part mechanical design according to the results of the part working condition design, and preliminarily determining the part structural parameters; S2035, forming part plans and drawings, and decomposing the functions and performance indicators into materials.

[0097] In some embodiments, in step S2015, part strength, earthquake resistance, stress, vibration and other analyses are performed; part plans and drawings are formed, and functions and performance indicators are decomposed into materials.

[0098] In some embodiments, step S204 includes: S2041, determining material performance requirements based on the function and performance index requirements of the part for the material; S2042, determining a preliminary material plan based on the material performance requirements; S2043, conducting laboratory trial production of materials based on the preliminary material plan.

[0099] In some embodiments, the technical feasibility evaluation of the materials trial-produced in the laboratory in step S205 may include: conducting technical feasibility evaluations such as material performance evaluation, material technical difficulties and solutions based on material verification requirements.

[0100] In some embodiments, the technical feasibility evaluation of the parts trial-produced in the laboratory in step S206 may include: conducting technical feasibility evaluations such as part function and performance evaluation, part technical difficulties and solutions based on part verification requirements.

[0101] In some embodiments, the technical feasibility evaluation of the components trial-produced in the laboratory in step S207 may include: conducting technical feasibility evaluations such as component function and performance evaluation, component technical difficulties and solutions based on component verification requirements.

[0102] In some embodiments, step S208 includes: S2081. Based on the laboratory-developed materials that have passed the technical feasibility evaluation, after solving the key technical problems of the materials, carry out material engineering trial production and material engineering verification. If the verification results meet the requirements, they are integrated upward into parts.

[0103] In some embodiments, step S208 further includes: S2082. Based on the laboratory trial-produced parts that have passed the technical feasibility evaluation, after solving the key technical problems of the parts, when the material engineering verification results meet the requirements, the parts engineering trial production and part engineering verification are carried out. If the verification results meet the requirements, they are integrated upward into the components.

[0104] In some embodiments, step S208 further includes: S2083. Based on the laboratory trial-produced components that have passed the technical feasibility evaluation, after solving the key technical problems of the components, when the engineering verification results of the parts meet the requirements, the component engineering trial production and component engineering verification are carried out. If the verification results meet the requirements, they are integrated upward into the equipment.

[0105] In some embodiments, step S208 also includes: S2084, based on the equipment trial-produced in the laboratory that has passed the technical feasibility evaluation, after solving the key technical problems of the equipment, when the results of the component engineering verification meet the requirements, the equipment engineering trial production is carried out to obtain the equipment engineering prototype.

[0106] In some embodiments, step S209 also includes: S2091. After the material engineering verification results meet the requirements, material engineering production is carried out; S2092. After the parts engineering verification results meet the requirements, parts engineering production is carried out on the basis of material engineering production; S2093. After the component engineering verification results meet the requirements, component engineering production is carried out on the basis of parts engineering production; S2094. After the engineering prototype verification results meet the requirements, equipment engineering production is carried out on the basis of component engineering production to obtain equipment products.

[0107] When the equipment engineering prototype is verified and passed, the engineering production of materials, parts and components will be carried out from bottom to top, and finally the equipment product will be produced.

[0108] In some embodiments, equipment technical status items are output at different design stages, including but not limited to system functions, performance, and physical characteristics defined in the following documents, such as "Equipment Design Requirements", "Equipment Operating Conditions Description", "Equipment Strength Calculation Report", "Equipment Mechanical Analysis Report", "Equipment Seismic Analysis Report", "Equipment Technical Specifications", "Equipment General Drawing", functional prototypes, engineering prototypes, production prototypes (equipment products), etc.

[0109] For a nuclear reactor, it is a complex "system", and the systems and equipment within it are also a "system" respectively. The technical development of these "systems" follows the "design and decomposition" and "integration and verification" ideas of system engineering theory.

[0110] From the reactor perspective, according to the rules of the reactor technology development process, it can be divided into the overall layer, system layer, and equipment layer, and "design and decomposition" from top to bottom and "integration and verification" from bottom to top are carried out layer by layer.

[0111] From a system perspective, according to the functional logical relationship between systems, they can be divided into the main system, dedicated safety system, primary auxiliary system, secondary auxiliary system, and tertiary auxiliary system. The design of the main system, dedicated safety system, primary auxiliary system, secondary auxiliary system, and tertiary auxiliary system is carried out in sequence, and the verification of the tertiary auxiliary system, secondary auxiliary system, primary auxiliary system, dedicated safety system, and main system is carried out in sequence.

[0112] From the perspective of equipment technology development, according to the equipment composition, it can be divided into equipment, components, parts, and materials, and the "design and decomposition" of equipment, components, parts, and materials, as well as the "integration and verification" of materials, parts, components, and equipment are carried out step by step.

[0113] At the same time, the overall, system and equipment technical development also needs to follow the system engineering technical process, that is, from demand analysis, technical requirement definition, functional analysis, scheme trade-off and design, determination of technical status and acceptance criteria to processing and manufacturing, integration, verification, delivery and confirmation, to jointly form a forward design of a new nuclear reactor based on system engineering theory.

[0114] Steps S1 and S2 reflect the design and decomposition process, including the design and decomposition between the overall layer, system layer, and equipment layer; the design of the main system, dedicated safety system, first-level auxiliary system, second-level auxiliary system, and third-level auxiliary system in the system layer; the design and decomposition between equipment, components, parts, and materials in the equipment layer; and the design and analysis process of the overall, system, and equipment from demand analysis, technical requirements definition, function analysis, solution trade-offs and design to determining the technical status and acceptance criteria.

[0115] Step S3 reflects the integration and verification process, including the integration and verification between the equipment layer, system layer, and overall layer; verification of the third-level auxiliary system, second-level auxiliary system, first-level auxiliary system, dedicated safety system, and main system within the system layer; integration and verification between materials, parts, components, and equipment within the equipment layer; and the design verification process of equipment, system, and overall from processing and manufacturing, integration, verification to delivery and confirmation.

[0116] The design and decomposition process is carried out from top to bottom, according to the reactor overall layer, system layer and equipment layer. The design and decomposition process is repeated in each design stage of the reactor. The end of the design analysis process at each design stage is to establish the technical status items and acceptance criteria of the reactor, system, equipment, components, parts and materials at that design stage to support subsequent processing, manufacturing and integration, and serve as the basis for acceptance.

[0117] Step S1 corresponds to the overall forward design method of the new nuclear reactor forward design (ie, corresponds to the design and decomposition of the overall layer).

[0118] In step S1, the design and decomposition steps corresponding to the overall layer may include: (1) mining and analyzing the "stakeholders" of the reactor, conducting demand analysis, and converting the relatively general needs of the "stakeholders" into qualitative or quantitative indicator requirements for reactor model development, which are defined as reactor technical requirements. (2) conducting functional logic analysis, comprehensively describing the reactor functions, and analyzing the functional logic architecture of the reactor, which not only describes all the functions that must be possessed, but also reflects the logical relationship between the functions. (3) based on the reactor functional logic architecture, decomposing the reactor technical indicators into various functions, and configuring the corresponding systems to achieve these functions and performance indicators and interface requirements, forming multiple reactor technical solutions; weighing and comparing multiple technical solutions, demonstrating the technical feasibility, safety, economy and other aspects of the technical solutions, weighing the best reactor technical solution; formulating relevant R&D plans, and conducting R&D tests. (4) carrying out design based on the best reactor solution, decomposing the functional and performance requirements corresponding to the reactor technical solution into the system; proposing the reactor technical status items and their acceptance criteria, and formulating relevant verification plans as inputs to the reactor integration and verification plan.

[0119] The overall design analysis process from reactor demand analysis to determination of reactor technical status items is repeated in different reactor design stages. As the design stage progresses, the depth of the output reactor technical status items also gradually deepens.

[0120] Step S2 corresponds to the system forward design method and equipment forward design method for the forward design of the new nuclear reactor (i.e., corresponding to the design and decomposition of the system layer and the equipment layer).

[0121] The design and decomposition steps corresponding to the system layer in step S2 may include: (1) Carry out the design of the main system, safety system, primary auxiliary system, secondary auxiliary system, and tertiary auxiliary system in sequence. (2) Explore and analyze the "stakeholders" of the system, weigh the requirements of multiple aspects (such as the overall layer and each upper system), convert them into qualitative or quantitative index requirements for system design, and define the system technical requirements. (3) Carry out system function logic analysis, comprehensively describe the system functions, analyze the system functional architecture, not only describe all the functions that must be possessed, but also reflect the logical relationship between the functions. (4) Based on the system function logic architecture, decompose the system performance indicators into each function, and configure the corresponding equipment to achieve these functions and performances to form multiple system solutions; weigh and compare multiple system solutions, demonstrate the technical feasibility, safety, economy and other aspects of the solutions, and weigh the best system solution; formulate relevant R&D plans, and carry out R&D tests. (5) Carry out system design based on the best system solution, decompose the requirements of the functions and performance of the system solution into the equipment; propose the system technical status items and their acceptance criteria, and formulate system-related verification plans as the input of the system integration and verification plan.

[0122] The system's design analysis process, from technical requirement definition to technical status item determination, is repeated in different reactor design stages. As the design stage progresses, the depth of the output system's technical status items also gradually deepens.

[0123] The design and decomposition steps corresponding to the equipment layer in step S2 may include: designing and decomposing equipment, components, parts, and materials step by step. The following uses equipment as an example to illustrate its design and decomposition process. The design and decomposition process of components, parts, and materials is similar and will not be repeated here.

[0124] (1) Explore and analyze the “stakeholders” of the equipment, weigh the requirements of multiple aspects (such as the system to which it belongs, other systems, or equipment derivatives), convert them into qualitative or quantitative indicator requirements for equipment design, and define equipment design requirements.

[0125] (2) Conduct a logical analysis of the equipment functions, give a comprehensive description of the equipment functions, and analyze the functional architecture of the equipment, which not only describes all the necessary functions but also reflects the logical relationship between the various functions.

[0126] (3) Decompose the equipment functional logical architecture and corresponding performance requirements into the equipment to form multiple equipment solutions; weigh and compare multiple equipment solutions, demonstrate the technical feasibility, safety, economy and other aspects of the equipment solutions, and weigh out the best equipment solution; formulate relevant R&D plans and carry out R&D experiments.

[0127] (4) Carry out equipment design based on the optimal equipment solution, and decompose the functional and performance requirements corresponding to the equipment solution into components and their materials; propose equipment technical status items and their acceptance criteria, and formulate equipment-related verification plans as input to the equipment verification plan.

[0128] (5) The design and decomposition process of equipment from the definition of technical requirements to the determination of technical status items is repeated in different design stages of the reactor. As the design stage progresses, the depth of the output equipment technical status items also gradually deepens.

[0129] It should be noted that in the process of design and decomposition, in addition to top-down design decomposition between levels, there is also bottom-up design feedback.

[0130] Step S3 corresponds to the integration and verification of the forward design of the new nuclear reactor.

[0131] The integration and verification process is carried out from bottom to top, step by step, according to the structural hierarchy of the reactor equipment layer, system layer and overall layer. The integration and verification process is repeated in each design stage of the reactor. The end of the integration and verification process in each design stage is marked by the completion of the integrated verification of the reactor, system, equipment, components, parts and materials in that stage, obtaining the established evaluation conclusions or verification data, and meeting the acceptance criteria of the technical status items of the reactor, system, equipment, components, parts and materials in that stage.

[0132] (1) Equipment layer

[0133] Carry out integration and verification of materials, parts, components and equipment step by step.

[0134] According to the different depths of technical status items output by materials / components / parts / equipment at different design stages, the verification content and requirements of materials / components / parts / equipment are also different. At different design stages, the verification of corresponding materials / components / parts / equipment must follow the steps of formulating a verification plan, conducting verification, and comparing the verification results with the technical status items and acceptance criteria of the materials / components / parts / equipment at the corresponding stage. When the verification results meet the acceptance criteria, a verification report for the materials / components / parts / equipment is issued, and the verified materials / components / parts / equipment are handed over to the next level.

[0135] (2) System layer

[0136] Verification is carried out in sequence from the third-level auxiliary system, the second-level auxiliary system, the first-level auxiliary system, the safety system, to the main system.

[0137] The system integration and verification content and requirements vary according to the different depths of the system technical status items output by the system at different design stages. At different design stages, the corresponding system integration and verification must follow the steps of formulating a verification plan, conducting verification, and comparing the verification results with the system technical status items and their acceptance criteria at the corresponding stage. When the verification results meet the acceptance criteria, a system verification report is issued and the verified system is handed over to the overall level.

[0138] (3) Overall layer

[0139] The content and requirements of reactor integration and verification vary according to the depth of the technical status items output by the reactor at different design stages. At different design stages, the corresponding reactor integration and verification must follow the steps of formulating a verification plan, conducting verification, and comparing the verification results with the reactor technical status items and their acceptance criteria at the corresponding stage. When the verification results meet the acceptance criteria, a reactor verification report is issued and the verified reactor is delivered to the higher level.

[0140] Similarly, in the process of integration and verification, in addition to bottom-up integration and verification between each level, there is also top-down verification feedback.

[0141] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0142] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A nuclear reactor model technology development method based on system engineering theory, characterized in that: include: S1. Analyze the power supply and heat supply capacity of the nuclear reactor to determine the technical status of the power plant and its acceptance criteria; wherein, in the technical status of the power plant, the power plant is divided into multiple systems, each of which has a different design priority; S2. Design and decompose each system in order of design priority from high to low to determine the system technical status and acceptance criteria corresponding to each system; in the process of designing and decomposing each system, propose the function, performance and interface requirements of all subordinate systems with lower design priority than the system; and design and decompose the system according to the technical status of the power plant and the function, performance and interface requirements proposed by all superior systems; S3. In order of design priority from low to high, each system shall be verified in accordance with the corresponding system technical status and acceptance criteria to ensure that the requirements of the technical status and acceptance criteria of each level of the system are met; after the verification of all systems is completed, the power plant shall be verified in accordance with the technical status of the power plant and its acceptance criteria to ensure that the requirements of the technical status and acceptance criteria of the power plant are met.

2. The method according to claim 1, characterized in that: The multi-level system includes a main system, a dedicated safety system, a primary auxiliary system, a secondary auxiliary system, and a tertiary auxiliary system, and the design priorities of the main system, the dedicated safety system, the primary auxiliary system, the secondary auxiliary system, and the tertiary auxiliary system are reduced in sequence; The main system is used to carry out the basic functions of nuclear heat generation, main heat transmission, steam power conversion and even power generation; The dedicated safety system carries the dedicated safety functions of overpressure protection and residual heat removal on the basis of the inherent safety of the main system; The primary auxiliary system is an auxiliary system that directly supports the main system and the dedicated safety system; The secondary auxiliary system is a non-process auxiliary system, which is an auxiliary system of the main system, the dedicated safety system and the primary auxiliary system; The third-level auxiliary system is a non-process auxiliary system, which is an auxiliary system that provides support for the entire plant system and equipment.

3. The method according to claim 2, characterized in that The S2 step includes: S2001. Design and decompose the main system according to the technical status of the power plant, and determine the function, performance and interface requirements of the main system for the dedicated safety system, the primary auxiliary system, the secondary auxiliary system and the tertiary auxiliary system; S2002. Design and decompose the dedicated safety system according to the technical status of the power plant and the function, performance and interface requirements of the main system for the dedicated safety system, and determine the function, performance and interface requirements of the dedicated safety system for the primary auxiliary system, the secondary auxiliary system and the tertiary auxiliary system; S2003. Design and decompose the primary auxiliary system according to the technical status of the power plant, the function, performance and interface requirements of the main system and the dedicated safety system for the primary auxiliary system, and determine the function, performance and interface requirements of the primary auxiliary system for the secondary auxiliary system and the tertiary auxiliary system; S2004. Design and decompose the secondary auxiliary system according to the technical status of the power plant, the functions, performance and interface requirements of the main system, the dedicated safety system and the primary auxiliary system for the secondary auxiliary system, and determine the functions, performance and interface requirements of the secondary auxiliary system for the tertiary auxiliary system; S2005. Design and decompose the third-level auxiliary system according to the technical status of the power plant, the functions, performances and interface requirements of the main system, the dedicated safety system, the first-level auxiliary system and the second-level auxiliary system for the third-level auxiliary system.

4. The method according to claim 1, characterized in that: In step S2, the design process for each system includes: S21. Determine the functions, performance indicators and interface requirements of the system according to the technical status of the power plant; S22. According to the functions and performance indicators and interface requirements of the system, perform system function decomposition and structural configuration on the system, and determine the equipment list of the system configuration; S23. According to the system function decomposition and structural configuration, carry out system process principle design, determine the system process principle diagram, and propose the system process design conditions for its equipment; S24. According to the process principle diagram of the system, perform equipment process design or selection, determine the equipment working conditions, equipment process parameters, equipment general diagram and equipment requirements for instrument control electrical equipment; S25. Determine a system process flow chart including instrument control points based on the system process schematic diagram, the equipment master diagram, system instrumentation and control, and electrical design; S26. According to the overall layout and zoning plan of the plant, carry out the system pipeline and plant layout, and conduct pipeline mechanical analysis and support and hanger design; S27. Carry out plant design according to pipeline and system plant layout; S28. Based on the evaluation of equipment functions and performance, comprehensively evaluate whether the system design meets the functional and performance indicators and interface requirements of the system from the perspective of functions and performance; S29. Determine the system plan, system technical status and acceptance criteria, formulate relevant R&D plans, and carry out R&D tests.

5. The method according to claim 4, characterized in that The system process principle design in step S23 and the equipment process design in step S24 are processes of repeated iteration and gradual optimization, with the ultimate goal of achieving optimization of system and equipment process design.

6. The method according to claim 4, characterized in that In step S25, according to the system process schematic diagram and the equipment general diagram, combined with the overall layout requirements of the plant, equipment layout and piping design are carried out; on the basis of the equipment layout and piping design, combined with the system instrumentation and control and electrical design, the system layout is carried out to determine the system process flow chart containing instrument control points.

7. The method according to claim 4, characterized in that In step S27, the plant design is carried out according to the layout of the pipeline and system plant, the floor response spectrum, concrete structure, steel structure, general plan and transportation are determined, and funding for civil engineering and ventilation utilities is provided.

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