无铍钍基熔盐堆堆芯设计与安全研究

摘要

In order to improve the performance of fuel breeding and core safety,new thorium molten salt reactor (TMSR) core was designed,which employs BeO as moderator and BeF2-free fuel salt.Based on this design,steady state and transient safety characteristics of TMSR were preliminarily analyzed using multi-physics code.By the transient simulation for start-up,pump speed down/up,loss of heat sink and so forth,the temperature and power response were analyzed.The results indicate that the new designed TMSR has excellent safety performance under various operating conditions.%为解决传统熔盐堆在核燃料增殖、安全性等方面的不足,提出了采用氧化铍慢化剂、无铍(BeF2)燃料熔盐的新型钍基熔盐堆(TMSR)堆芯设计.在此基础上,利用多物理计算程序开展了TMSR稳态及瞬态初步安全特性分析.通过对反应堆启动、熔盐泵超速及降速、丧失热阱等典型瞬态的计算,分析了各种工况下堆芯功率与温度的变化情况.结果表明,在各种运行瞬态及事故情况下,新型的TMSR设计具有良好的安全特性.