新概念熔盐堆的固有安全性及相关关键问题研究

新概念熔盐堆是6种第四代反应堆中唯一的液体燃料反应堆，在固有安全性、经济性、核资源可持续发展及防核扩散等方面具有其它反应堆无法比拟的优点。针对熔盐堆的特点，建立通用的物理分析、热工水力分析和安全分析模型，并采用隐式方法实现物理热工的耦合。将建立的数学模型应用于锕系元素再循环嬗变熔盐堆（MOSART）的计算，对其堆芯物理特性、热工水力特性和安全特性进行了系统分析，考察了入口温度、速度及燃料盐在堆芯外运行时间的影响。

Research on Inherent Safety and Relative Key Issues of a Molten Salt Reactor

The new concept molten salt reactor (MSR) is the only liquid-fuels reactor in the six candidates of the Generation Ⅳ advanced nuclear reactor, which is characterized by remarkable advantages in safety, economics, continuable development of the fissile resources, and proliferation resistance of nuclear energy. The general models of neutronics, thermal hydraulics and safety analysis were established for molten salt reactors, and the implicit method was adopted to couple the neutronics model and the thermal hydraulics model. The founded models were applied to the calculation of the molten salt actinide recycler and transmuter system (MOSART), in which the neutronics, thermal hydraulics and safety characteristics were obtained, and the influences of the inlet temperature, inlet velocity and the resistant time of the fuel salt in the external loop were analyzed.