西安脉冲堆概率安全分析技术要点及分析框架研究

Study on Key Techniques and Framework of Probabilistic Safety Assessment in Xi'an Pulsed Reactor

针对西安脉冲堆(XAPR)自身设计特点及安全特性,研究了XAPR概率安全分析(PSA)的技术特殊要点,提出了XAPR PSA分析框架及技术要素具体实施方法。最后以XAPR堆水池中破口失水事故为始发事件,验证了XAPR PSA研究思路。分析表明:以始发事件为起点、事件序列为主干、放射性释放类为终点的一体化事件树结构分析框架适合于XAPR PSA。

Based on the unique design characteristics and safety features of Xi＇an Pulsed Reactor（XAPR）, the special key techniques of XAPR probabilistic safety assessment（PSA） was studied. XAPR PSA analysis framework and the way to implement the key technique were put forward. Finally, XAPR PSA research thought was illustrated by a case study on medium LOCA at the core height of XAPR reactor pool. The analysis shows that the integral event tree framework, which spread through event sequence structure with initiating events at the beginning and radioactive release categories in the end, is suited to XAPR PSA analysis at this stage.