摘要
重要度分析是核电站概率安全评价中一个重要组成部分。本文首先简要介绍了RAW重要度;在详细分析了截断对重要度的影响后,引入了安全风险因子,指出影响该因子的相关因素,同时也提出只有保证安全风险因子在一定的变化范围之内即减少可能丢失的割集,才能最终降低截断对重要度的影响。最后给出一种解决概率截断问题的思路即使用自动概率截断和McFarm相结合的方法,较好地解决了因概率截断而对重要度计算误差问题。
Importance analysis is an important part in probabilistic safety assessment of nuclear power plants. The effect of truncation limit on importance measures is discussed. A safety risk factor is proposed which should be controlled in a certain range so that can reduce possible truncated minimal cut sets. A new method is put forward which combines auto cutoff value adjustment and McFarm that solves the problem of truncation error effectively.
出处
《核科学与工程》
CSCD
北大核心
2006年第4期363-367,共5页
Nuclear Science and Engineering
关键词
重要度
RAW
概率截断
安全风险因子
importance measures
risk achievement worth truncation safety risk factor
