Method for improving safety performance analysis of nuclear power plant by embedding discrete dynamic event tree

Abstract

The invention discloses a method for improving safety performance analysis of a nuclear power plant by embedding a discrete dynamic event tree, which comprises the following steps of: S1, writing a RELAP5 software input file '*. I' file according to a confirm theory safety analysis method according to a safety problem needing to be analyzed of the nuclear power plant; s2, constructing a DETRIA-A module serving as a basic interface module; s3, constructing a DETRIA-B module serving as a data extraction module; s4, constructing a DETRIA-C module serving as a file management module; s5, a DETRIA-D module serving as a RELAP5 starting module is constructed; s6, constructing a DETRIA-E module which is used as a DET simulation module; and S7, constructing a DETRIA-F module as a post-processing module. The method has the advantage that the dynamic event tree method can be autonomously coupled with the RELAP5 program of the deterministic theory safety analysis program.

Description

Technical field [0001] The present invention relates to a nuclear power plant safety analysis, and in particular, to the method of improving the safety performance analysis of nuclear power plants using embedded discrete dynamic events. Background technique [0002] The traditional nuclear power plant safety analysis method includes two types of security analysis methods and probability safety evaluation methods; the judicial analysis method generally uses Relap5 and other software; probability safety evaluation method is based on traditional event tree / fault tree method. Single determination theory and probability theory has limitations in analyzing the dynamic characteristics of nuclear power plants; therefore, in order to achieve the possible complex interactive models of hardware / software / process / human behavior during complex system evolution of nuclear power plants Modeling, thereby developing a dynamic event tree method. [0003] At present, the discrete dynamic eve...

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Problems solved by technology

[0005] In order to solve the above problems and overcome the shortcomings of the single deterministic safety analysis and probabilistic safety evaluation of traditional nuclear power plants, the present invention provides a method for improving the safety performance analysis of nuclear power plants by using embedded discrete dynamic event trees. The method uses DET and deterministic analysis The dynamic coupling of the software, in addition to obtaining the traditional deterministic analysis and calculation results, can also obtain the possibility of calculation and analysis results, that is, the probability of occurrence, and then provide risk-guided decision support information for the design, operation and management of nuclear power plants

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