主给水隔离方式对主蒸汽管道破裂事故质能释放与安全壳行为的影响分析  

Effect of Main Feedwater Isolation Modes on Mass and Energy Release and Containment Response for MSLB

作　　者：关仲华[1] 邱志方[1] 蒋孝蔚 段永强[1] 沈云海[1] 方浩宇[1] Guan Zhonghua;Qiu Zhifang;Jiang Xiaowei;Duan Yongqiang;Shen Yunhai;Fang Haoyu(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技术重点实验室,成都610213

出　　处：《核动力工程》2020年第2期193-197,共5页Nuclear Power Engineering

摘　　要：以秦山第二核电厂3、4号机组为对象,采用THEMIS程序分析了隔离给水管线上阀门和停运主给水泵2种给水隔离方式对主蒸汽管道破裂(MSLB)事故质能释放的影响,并采用PAREO9程序模拟了安全壳热工水力现象。结果表明,采用隔离阀门的方式能够更加有效地缓解MSLB的质能释放,采用停运主给水泵方式时提高浓硼箱中的硼浓度可以在一定程度上缓解MSLB的质能释放,避免安全壳超压。Taking the 3&4 units in Qinshan Second Nuclear Power Plant as an example,the effect of two modes of feedwater isolation on the mass and energy release during a large main steam line break(MSLB)accident,by valve isolation and shutdown of the main feedwater pump,is analyzed by THEMIS code.The thermal-hydraulic phenomenon in the containment is analyzed by PAREO9 code.It is concluded from the results that the isolation mode by valve isolation is more effective to reduce the mass and energy release in MSLB and the increasing of boron concentration in the boron injection tank can also reduce the mass and energy release in MSLB.

关 键 词：主蒸汽管道破裂(MSLB)事故 质能释放 主给水隔离 

分 类 号：TL364.4[核科学技术—核技术及应用]