池式钠冷快堆双层容器泄漏事故序列研究

钠冷快堆是第4代反应堆中的优选堆型，具有安全性高的特点。池式钠冷快堆的双层容器泄漏会导致一回路钠泄漏并发生严重事故。本文采用概率安全分析方法分析池式钠冷快堆双层容器泄漏事故，包括事故的确定论分析及放射性释放路径分析以及池式钠冷快堆双层容器泄漏的事故序列及定量化。结果表明，池式钠冷快堆双层容器泄漏事故后正常通风开启情况下可能发生大量放射性释放。双层容器泄漏导致的大量放射性释放频率为1.07×10^-11（堆?年）^-1，双层容器泄漏事故中大量放射性释放占比为0.1%。

Analysis of Leakage Accident Consequence in Double-layer Container of Pool Type Sodium Cooled Fast Reactor

Pool type sodium cooled fast reactor is the preferred reactor type for the fourth generation reactor. The double-layer container leakage in the primary container will cause sodium leakage and severe accident. The probabilistic safety analysis method was used to analyze the double-layer container leakage of sodium cooled fast reactor, which could not only complete the severe accident analysis of the pool type sodium cooled fast reactor, but also provide reference for the design of the pool type sodium cooled fast reactor. The classifications of the process and accident consequences of the pool type sodium cooled fast reactor double-layer container leakage after the accident were described in detail. The frequency of radioactive release caused by leakage of double-layer container is 1.07×10^-11 (reactor?year)^-1, and large release frequency in double-layer container is 0.1%.