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始发事件分析是反应堆概率安全评价的起点。本文以10 MW固态钍基熔盐堆(Thorium Molten Salt Reactor,TMSR-SF1)为研究对象,采用主逻辑图分析方法,基于TMSR-SF1的最新概念设计,在参考已有氟盐冷却高温堆、高温气冷堆和钠冷快堆的始发事件清单和始发事件分析理论的基础上,针对TMSR-SF1始发事件分析进行初步探索研究,初步确定了TMSR-SF1的始发事件清单,共得到了TMSR-SF1的37个始发事件(功率运行情况下),并按照故障类型分类的方法对这些始发事件进行分组,共分为6组。为TMSR-SF1下一步的深入分析研究始发事件及其概率安全评价(Probabilistic safety assessment,PSA)中事故序列分析奠定了重要基础,也为安全分析的完整性提供了支持。
The onset event analysis is the starting point of the reactor safety evaluation. Based on the latest conceptual design of TMSR-SF1, this paper takes the 10 MW solid state thorium-based molten salt reactor (TMSR-SF1) as the research object. By using the main logic diagram analysis method, Based on the analysis of the initial events and the originating events of HTR reactors and sodium-cooled reactors, a preliminary exploration and analysis of the initial events of TMSR-SF1 were carried out, and the initial list of events of TMSR-SF1 was initially identified 37 initial events of TMSR-SF1 (under power running) are obtained, and these origination events are grouped according to the type of fault and divided into 6 groups. This will lay a solid foundation for the next in-depth analysis of TMSR-SF1 and the analysis of incident events and its sequence analysis in Probabilistic safety assessment (PSA), and also support the integrity of safety analysis.