小型堆硼化过程化学停堆能力分析

Analysis on Chemical Shutdown Capability of Boration Process for Small Modular Reactor

本文分析了小型堆在卡棒事故下通过化学停堆手段使反应堆安全停堆的条件,通过对不同工况下硼化过程需要的硼酸注入量和硼酸充注时间进行理论计算,对比分析了卡棒数量、硼酸注入浓度和充注流量等不同因素对硼酸注入量和充注时间的影响,所得结果表明化学停堆能力满足相关要求,为系统优化设计提出建议并为安全分析提供参考。

In this paper,requirements for safe shutdown by chemical control are analyzed in the rod stuck accident of small modular reactor.Through theoretical calculation of the volume and time needed for boric acid injection process during different operating conditions,the influence of different factors such as the number of stuck rods or concentration and flux of boric acid are compared.The results show that chemical shutdown capability meets the relevant demands,which offers suggestions for the optimization of the system and reference of safety analysis.