自然循环铅基快堆一回路系统驱动力的关键影响因素研究

为深入研究影响自然循环铅基快堆一回路系统驱动力的关键因素，以自然循环铅基快堆SNCLFR-10为研究对象构建描述反应堆一回路自然循环稳态运行模型；从理论上量化分析冷/热池的热量传递、热源和热阱温度非线性分布、反应堆压力容器壁散热3种因素对自然循环能力的影响，并开展了相关数值模拟验证。结果表明，数值模拟结果与本研究理论计算值吻合较好；3种自然循环能力影响机制耦合作用将降低SNCLFR-10系统自然循环能力，导致自然循环流量与功率之间不再满足理论所得的1/3次方关系。 

Research on the Key Influencing Factors of the Driving Force of the Primary Loop System of the Natural Circulation Lead-based Fast Reactor

In order to deeply study the key factors affecting the driving force of the primary loop system of the natural circulation lead-based fast reactor, taking the natural circulation lead-based fast reactor SNCLFR-10 as the research object, a steady-state operation model describing the natural circulation of the primary loop of the reactor was constructed; The effects of heat transfer in cold/hot pool, nonlinear temperature distribution of heat source and heat sink and heat dissipation of reactor pressure vessel wall on natural circulation capacity are quantitatively analyzed theoretically, and relevant numerical simulation verification is carried out. The results show that the numerical simulation results are in good agreement with the theoretical calculation values in this study; the coupling effect of the three natural circulation capacity influencing mechanisms will reduce the natural circulation capacity of the SNCLFR-10 system, resulting in the relationship between natural circulation flow and power no longer satisfying the 1/3 power obtained by theory.