原子能科学技术2016，Vol.50Issue(3)：446-453,8.DOI:10.7538/yzk.2016.50.03.0446
严重事故下正常余热排出系统向堆芯注水策略分析
Analysis of RCS Injection Strategy by RNS during Severe Accident
摘要
Abstract
In order to evaluate the effectiveness of normal residual heat removal system (RNS) for RCS injection strategy during severe accidents ,two typical severe accident sequences were selected and analyzed with MAAP4 code ,including direct vessel injec‐tion (DVI) line break induced severe accident w hich contributes most to the core damage frequency ,and loss of feed water (LOFW) induced severe accident which is a typical high‐pressure core melt accident .Both mitigation effect and negative impact of the RNS injection strategy were evaluated .The results show that RNS injection can effectively terminate core melt progression and keep long‐term core cooling in two typical severe accident sequences .However ,more hydrogen generates in core during core reflooding stage w hich may lead to hydrogen hazard in the containment . Furthermore , the influence of injection flowrate was discussed with the minimum injection flowrate for long term decay heat removal given by the computational aid documents from the severe accident management guideline .T he analysis results indicate that higher flow rate should be preferred for RCS injection strategy during severe accidents if the injection system would be available .关键词
严重事故管理/正常余热排出系统/堆芯注水Key words
severe accident mitigation/normal residual removal system/RCS injection分类
能源科技引用本文复制引用
李亚冰,郭丁情,曹学武..严重事故下正常余热排出系统向堆芯注水策略分析[J].原子能科学技术,2016,50(3):446-453,8.基金项目
国家自然科学基金资助项目 （）
