铀纯化转化设施始发事件分析

始发事件分析是概率安全分析的基础,对始发事件进行定量化评价是概率安全分析获得量化风险结果的必要条件。本文采用工程评估和演绎分析相结合的方法识别了典型铀纯化转化设施的始发事件,根据设施安全保护措施的异同将始发事件分为5组,并对铀纯化转化设施主要关注的UF₆泄漏事件采用事件树分析法进行事故序列分析,得到UF₆泄漏事件序列和相应的频率。

Analysis of initial events of uranium purification and conversion facility

The initial events analysis is the basis of probabilistic safety analysis. Quantitative evaluation of the initial events is the precondition for probabilistic safety analysis to obtain quantitative risk results. Combination of engineering evaluation and deductive analysis is used to identify the initial events of typical uranium purification and conversion facilities. According to the similarities and differences of facility safety protection measures, the initial events are categorized into five groups, and the UF₆ leakage is the main concern in uranium purification and conversion facility. Event tree for accident sequence analysis was used to obtain UF₆ leakage events sequence and the corresponding frequency.