固态钍基熔盐堆概率安全评价始发事件分析研究  

Research on initial event analysis for solid thorium molten salt reactor probabilistic safety assessment

作　　者：梅牡丹[1] 邵世威 何兆忠[1] 陈堃[1] 

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800

出　　处：《核技术》2014年第9期43-50,共8页Nuclear Techniques

基　　金：中国科学院战略性先导科技专项项目(No.XDA02050000)资助

摘　　要：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。Background： Initial event analysis is the beginning of the reactor nuclear safety analysis and probabilistic safety assessment, and plays a key role in these analyses. At present, the initial event analysis evaluation method and experience are mainly used for the water reactors. There is hardly any analysis method and theory for the initial event analysis of the solid thorium molten salt reactor. However, with the research of molten salt reactor and the reactor progress of probabilistic safety assessment（PSA）, initial event analysis has become increasingly important. Purpose： On the one hand, by carrying on the preliminary exploration research for the TMSR-SF1（Thorium Molten Salt Reactor, Solid Fuel #1） initial event analysis, to determine TMSR-SF1 initial events of potential, causes radioactive release, and give the TMSR-SF1 initial event lists. On the other hand, the aim is to group the determinate initial events. Methods： First of all, we used the master logic diagram（MLD） analysis method, and referenced the initial event lists of pressurized water reactor, the fluoride-salt-cooled high-temperature reactor（FHR）, the high temperature gas cooled reactor and the sodium cooled fast reactor, to carry on the TMSR-SF1 preliminary analysis and research of initial events and main external events. Then, the accident type classification method was applied to group theTMSR-SF1 preliminary determinate initial events. Results： Through the MLD analysis, we determined the preliminary initial event lists for TMSR-SF1 which contain 37 initial events, and given 6 class accident types of TMSR-SF1 initial events. Conclusion： This study provides basic foundation for the TMSR-SF1 PSA accident sequence analysis of the next step, and gives an important support for the integrity of the molten salt reactor safety analysis.

关 键 词：固态钍基熔盐堆 概率安全评价 主逻辑图 始发事件分析 

分 类 号：TL364[核科学技术—核技术及应用]