DHR-200池式低温供热堆SBO-ATWS事故及自然循环能力分析  

Analysis of SBO-ATWS Accident and Natural Circulation Capacity of DHR-200 Pool Type Low Temperature Heating Reactor

作　　者：岳芷廷[1] 刘兴民[1] 郭春秋[1] 邹佳讯 李杨柳[1] YUE Zhiting;LIU Xingmin;GUO Chunqiu;ZOU Jiaxun;LI Yangliu(Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院反应堆工程技术研究部,北京102413

出　　处：《原子能科学技术》2020年第10期1834-1839,共6页Atomic Energy Science and Technology

摘　　要：DHR-200池式低温供热堆(简称DHR-200池式堆)设计有自然循环瓣阀,为检验其安全性,选取典型的全厂断电叠加紧急停堆系统失效(SBO-ATWS)事故,使用RELAP5程序对其热工水力参数瞬态特性及其自然循环能力进行分析。结果表明,DHR-200池式堆具有很好的负温度反应性反馈效应,即SBO-ATWS事故后,由于燃料和冷却剂温度升高,引入负反应性,可使反应堆实现热停堆;事故后,通过非能动方式开启自然循环瓣阀,可建立稳定的自然循环,将堆芯衰变热导出至堆水池内,验证了DHR-200池式堆的固有安全性。DHR-200 Pool Type Low Temperature Heating Reactor(DHR-200)was designed with natural circulation flap valve.In order to examine the safety of the DHR-200,the RELAP5 code was used to analyze the transient thermal-hydraulic characteristics and the natural circulation capacity under the station blackout anticipated transient without scram(SBO-ATWS).The results show that DHR-200 has enough negative temperature reactivity feedback effect.With the rising of the temperatures of the fuel and the coolant,finally the reactor can be shut down by the effect of the negative temperature reactivity feedback effect.After the accident,the natural circulation flap valve will be opened by passive means to establish a stable natural circulation,and then the residual heat of the core can be removed to pool of the reactor.Therefore,it is demonstrated that the DHR-200 has good inherent safety features.

关 键 词：池式低温供热堆 RELAP5程序 非能动 自然循环 瓣阀 

分 类 号：TL411[核科学技术—核技术及应用]