Common Cause Failure Analysis of Feedwater System in Marine Nuclear Reactors Based on GO Methodology
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摘要: 对反应堆补水系统进行可靠性分析时,按照其不同的工作状态分2个阶段来完成。第1阶段,分析共因部件组2对补水上充部分的影响;第2阶段,综合分析共因部件组1和2对整个补水系统的影响。本文采用GO法分别对补水系统的2个阶段进行系统可靠性分析。首先构造系统模型,通过系统分析建立GO图,并根据GO法关于共因失效的算法计算2个阶段的系统不可用度及共因失效对不可用度的贡献。分析结果表明,共因失效对系统可靠性产生很大影响,而GO法算法是进行系统共因失效分析的有效而实用的方法。Abstract: Feedwater system is divided into two parts: feedwater making and feedwater supplying.Two procedures are carried out in analyzing the feedwater system according to different working condition.In the first stage,the effect of common cause component group 2 to the part of feedwater supplying is analyzed,and in the second stage,the effect of common cause component group 1 and 2 to the whole feedwater system is comprehensively analyzed.This paper respectively analyzes the reliability of feedwater system in two stages with GO Methodology.Firstly,the model of system and construct the GO chart of feedwater system is constructed by analyzing the system,and then the system unavailability in two stages is calculated based on the GO algorithm dealing with common cause failures and the contribution of common cause failure to it.The analysis results show that the common cause failure greatly affects the system reliability and the GO algorithm is the effective and practical method to analyze the system with common cause failure.
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Key words:
- GO methodology /
- Common cause failure /
- Feedwater system /
- Reliability analysis
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