中国实验快堆(CEFR)是中国首座钠冷实验快堆,CEFR反应堆寿期内大部分时间处于低功率或停堆运行工况,在低功率或停堆运行工况反应堆安全风险依然存在。CEFR在设计时,对冷停堆工况研究不多,缺乏冷停堆的运行指导,因而停堆工况的安全性也是CEFR安全运行重要课题之一 China Experimental Fast Reactor (CEFR) is the first sodium-cooled experimental fast reactor in China. During the lifetime of CEFR reactors, most of the CEFR reactors are in low-power or shutdown operation conditions, and the reactor safety risk still remains during low-power or shutdown operations. CEFR in the design, research on cold shutdown conditions, the lack of cold shutdown of the operational guidance, and thus shut down the safety of CEFR operation is also one of the important issues safe operation