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熔盐堆是第四代核反应堆的六种构型之一,具有良好的经济性和固有安全性。以球形包覆颗粒燃料元件为基本单元设计了可用于熔盐冷却高温堆的燃料组件,并在此燃料组件模型下构建了组件型熔盐堆堆芯,研究了组件容器材料的种类、密度、厚度以及球形燃料元件中包覆颗粒填充率、FLi Be熔盐中7Li富集度对无限介质增殖因数K_(inf)、冷却剂反应性温度系数(Reactivity Temperature Coefficient,RTC)、排空反应性(Void Reactivity,VR)的影响。结果表明,作为组件材料,碳材料明显优于碳化硅材料;提高包覆颗粒(Tristructural Isotropic,TRISO)填充率、7Li富集度有利于提高堆芯的中子经济性和安全性。
The molten salt reactor is one of the six configurations of the fourth generation nuclear reactor with good economy and inherent safety. Based on the spherical coated pellets as the basic unit, a fuel assembly that can be used for molten salt cooling of high temperature reactor was designed. Based on the fuel assembly model, a module-type molten salt reactor core was built. The types, density, The particle filling rate of coated spherical fuel elements, the enrichment of 7Li in FLi Be molten salt on the infinite medium multiplication factor K inf, coolant reactivity temperature coefficient RTC and evacuation reactivity Void Reactivity, VR). The results show that the carbon material is obviously superior to the silicon carbide material as the component material. The packing efficiency of Tristructural Isotropic (TRISO) and the enrichment of 7Li are favorable to improve the neutron economy and safety of the core.