ACP600主蒸汽管道破裂事故的应对措施研究  

Study on Mitigation Strategies for ACP600’s Main Steam Line Break Accident

作　　者：张舒[1] 邱志方[1] 张晓华[1] 陈宏霞[1] 方红宇[1] Zhang Shu;Qiu Zhifang;Zhang Xiaohua;Chen Hongxia;Fang Hongyu(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计重点实验室

出　　处：《核动力工程》2019年第6期183-188,共6页Nuclear Power Engineering

摘　　要：针对ACP600取消高压安注系统和浓硼箱、使用一体化钆为可燃毒物、采用Mode-C运行与控制模式等设计改进导致主蒸汽管道破裂(MSLB)事故安全裕量降低的不利情况,对先进三代核电厂ACP600的MSLB事故进行分析研究。为避免MSLB事故下反应堆重返临界后堆芯功率峰值过高导致偏离泡核沸腾比(DNBR)低于限制值,分别从快速注入硼溶液和减缓堆芯冷却率的角度,评价不同的安注系统配置以及停运故障环路主泵对于缓解MSLB事故的作用。研究最佳的缓解方案,并提出增设"蒸汽管线压力低-3"信号停运故障环路主泵的设计优化建议。The main steam line break(MSLB) accident of ACP600 advanced third generation n uclear power plant is taken as the research object. The MSLB accident of ACP600 is analyzed and s tudied aiming at the disadvantageous situations that ACP600 cancels high pressure safety injection s ystem and boron injection tank, using integrated gadolinium as burnable poison, adopting mode-Co peration and control mode and so on. For MSLB accident, because of the high peak power of the rea ctor core after re-reaching the critical state, in order to avoid the minimum DNBR(Departure from Nucleate Boiling Ratio) below the limiting value, the effects of different injection system configurat ions and tripping the fault loop’s reactor coolant pump on mitigating MSLB accident are evaluated f rom the viewpoints of rapid injection of boron solution and reduction of core cooling rate, and the b est mitigation scheme is studied, the design optimization advice about adding "steam line pressure l ow-3 " signal for shutting down the fault loop is put forward.

关 键 词：ACP600 主蒸汽管道破裂 反应性控制 堆芯冷却 停运主泵 

分 类 号：TH353.3[机械工程—机械制造及自动化]