原子能科学技术Issue(11)：2069-2075,7.DOI:10.7538/yzk.2015.49.11.2069
百万千瓦级压水堆严重事故后再注水的有效性评价
Water Reflooding Effectiveness Assessment for 1 000 MWe PWR under Severe Accident Condition
摘要
Abstract
The MELCOR1.8.6 code was applied to a severe accident model of a 1 000 MWe PWR which includes primary system,secondary system,passive core cool-ing system and containment system.For the transient case,a small break LOCA with 2 inch (5.08 cm)break at the cold leg concurrent with failure of gravity injection was selected.After the core was damaged due to the failure of gravity inj ection,it was assumed that the coolant was inj ected into the pressure vessel,and then the water reflooding effectiveness was evaluated and analyzed.In this calculation,the coolant injection into reactor core with the small (10 kg/s),medium (50 kg/s)and large (200 kg/s)mass flow rates respectively at 3 different time stages of the severe accident was simulated.The effectiveness of water reflooding was assessed through hydrogen production,radioactive materials released from core,and core temperature.The results show that the mass flow rate above 10 kg/s is believed to be efficient for cooling a 1 000 MWe reactor at the beginning of core damage.However,with the accident devel-oping to core relocation,a large mass flow rate of 200 kg/s is considered to be applicable for core cooling.As a result,the mass flow rate below this value should be carefully considered when inj ecting water into the core.关键词
MELCOR/严重事故/再注水/严重事故缓解Key words
MELCOR/severe accident/water reflooding/severe accident mitigation分类
能源科技引用本文复制引用
胡啸,黄挺,裴杰,陈炼..百万千瓦级压水堆严重事故后再注水的有效性评价[J].原子能科学技术,2015,(11):2069-2075,7.基金项目
国家科技重大专项资助项目(2011ZX06004-008) （2011ZX06004-008）
