Parameter uncertainty analysis method and system of nuclear power reactor system

Abstract

The invention provides a parameter uncertainty analysis method and system for a nuclear power reactor system, and the method comprises the steps: building a system evaluation model according to a system design value through employing an optimal estimation program, and carrying out the steady-state debugging of the system evaluation model; carrying out sensitivity analysis on the input parameter / physical model by utilizing a system evaluation model to obtain a key input parameter / key physical model, and obtaining a target change range of the key input parameter / key physical model according to characteristics of the key input parameter / key physical model; constructing a target parameter sample point set according to a target change range of the key input parameter / key physical model, and performing uncertainty analysis on the target parameter sample point set by using a system evaluation model to obtain an uncertainty quantification result of the key input parameter / key physical model, according to the method, the excessive conservative allowance of the nuclear power reactor system is effectively released, and the economical efficiency of the nuclear power reactor system is improved to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of nuclear power reactor system parameter analysis, and in particular relates to a parameter uncertainty analysis method and system of a nuclear power reactor system. Background technique [0002] With the rapid development of nuclear power reactor systems and the national security requirements for nuclear power reactor systems, in the design stage, safety analysis, design verification and other stages, computer analysis programs are widely used to carry out research on nuclear power reactor system physics, thermal engineering, Safety and other aspects of simulation analysis, and based on the corresponding analysis results to guide the design and even engineering applications. In order to ensure that the relevant analysis results can be applied to actual projects, conservative analysis procedures, models or methods are generally used, and a certain safety margin is set aside in the analysis. Although the ab...

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention proposes a technical solution for parameter uncertainty analysis of a nuclear power reactor system, to solve the problem that the traditional conservative analysis method mechanically adopts conservative superposition, which may cause the nuclear power reactor system to be overly conservative. Technical issues that do not function adequately

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