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以熔盐堆丧失厂外电源(Loss of offsite power,LOOP)为例,采用概率安全评价(Probabilistic safety assessment,PSA)程序Risk Spectrum对其进行PSA分析,同时假设一回路没有任何阀门,且设备可靠性数据基于现有成熟电站设备的可靠性数据,得到了熔盐堆LOOP事故引发的放射性物质向堆芯释放的事故序列及其频率。结果表明,熔盐堆LOOP事故引发的放射性物质向堆芯的释放频率为2×10-11/(堆·年),获得了不确定性分析的点估计和区间估计,重点找出了对LOOP事故引发的放射性物质向堆芯的释放频率贡献最大的因素是反应堆舱室冷却功能失效,为后期熔盐堆系统的设计与改进提供了有效的帮助。
Taking Loss Of Offsite Power (LOOP) as an example, PSA is analyzed by Risk Spectrum, a Probabilistic safety assessment (PSA) program, and it is assumed that there is no valve in the first circuit and the equipment is reliable Based on the reliability data of existing mature power plant equipment, the accidental sequence and its frequency of release of radioactive material to the core caused by the LOOP accident of the molten salt reactor were obtained. The results show that the release frequency of radioactive material from the LOOP accident caused by molten salt pile to the core is 2 × 10-11 / (heap years), and the point estimation and interval estimation of uncertainty analysis are obtained. The most contributory factor of accidental release of radioactive material to the core is the failure of the reactor compartment cooling function, which provides an effective help for the design and improvement of the later molten salt reactor system.