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国际原子能机构(International Atomic Energy Agency,IAEA)认为小型模块化反应堆具有很好提高核能安全性、经济性和防止核扩散的能力,是未来核能最具发展前景的堆型之一。为适应未来核能发展的需求,提出了一种铅铋冷却氮化物燃料小型模块化反应堆(Small Modular Pb-Bi Cooled Reactor with Nitride Nuclear Fuel,SMPBN)设计方案,并利用PIJ组件计算程序和CITATION堆芯计算程序对SMPBN的物理特性和安全特性,包括反应性系数及其随燃耗变化、卸料燃耗、功率峰因子、燃料转换比和停堆余量等进行了深入分析。通过分析,认为SMPBN在20年寿期内,具有很好的燃料转换能力,不需要换料,反应性波动很小,反应性系数均为负值,具有固有安全性,符合国际上第四代反应堆的要求。
According to the International Atomic Energy Agency (IAEA), small modular reactors are one of the most promising types of nuclear power in the future with their ability to improve the safety, economy and nuclear proliferation of nuclear energy. In order to meet the need of future nuclear energy development, a design scheme of Small Modular Pb-Bi Cooled Reactor with Nitride Nuclear Fuel (SMPBN) was put forward. The calculation program of PIJ module and CITATION core The calculation program provides an in-depth analysis of the physical and safety characteristics of SMPBN, including the reactivity coefficients and their changes with burnup, discharge burnup, peak power factor, fuel conversion ratio, and shutdown allowances. Through the analysis, it is considered that SMPBN has good fuel conversion ability during 20 years of life, no need of refueling, little fluctuation of reactivity, negative reactivity coefficient, inherent safety, in line with the fourth generation in the world Reactor requirements.