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

In order to conduct an in-depth study on the key factors influencing the driving force of the primary loop system of a natural circulation lead-based fast reactor, taking the natural circulation lead-based fast reactor SNCLFR - 10 as the research object, a model describing the steady-state operation of the natural circulation in the reactor's primary loop is constructed. Theoretically, a quantitative analysis is carried out on the influence of three factors on the natural circulation capacity, namely the heat transfer in the cold/hot pool, the non-linear distribution of the temperatures of the heat source and heat sink, and the heat dissipation from the wall of the reactor pressure vessel, and relevant numerical simulations for verification have been carried out. The results show that the numerical simulation results are in good agreement with the theoretical calculation values of this research. The coupling effect of the three influence mechanisms on the natural circulation capacity will reduce the natural circulation capacity of the SNCLFR - 10 system, resulting in that the relationship between the natural circulation flow rate and the power no longer satisfies the 1/3 power relationship obtained theoretically.

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。