49-2泳池堆低温供热全厂断电ATWS事故分析  

Analysis of SBO-ATWS Accident of 49-2 Pool Type Low Temperature Heating Reactor

作　　者：岳芷廷[1] 刘兴民[1] 郭春秋[1] 邹佳讯 尹皓[1] 张焱[1] YUE Zhiting;LIU Xingmin;GUO Chunqiu;ZOU Jiaxun;YIN Hao;ZHANG Yan(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8期1426-1432,共7页Atomic Energy Science and Technology

摘　　要：针对49-2泳池式反应堆(简称49-2泳池堆)用于城市低温供热的工况,选取典型的全厂断电叠加紧急停堆系统失效(全厂断电ATWS)的超设计基准事故,使用RELAP5/MOD3.2程序对其热工水力参数瞬态特性进行分析。结果显示,49-2泳池堆具有很好的负温度反馈效应,事故后,由于燃料和冷却剂温度升高,从而引入一定的负反应性,使反应堆处于次临界状态;同时堆芯通过与堆水池建立自然循环,将衰变热带出,最终依靠自然循环方式将堆芯余热排出至上部大气环境热阱,验证了49-2泳池堆用于城市低温供热的固有安全性。The transient thermal hydraulic characteristics of 49-2 Pool Type Low Temperature Heating Reactor were analyzed by RELAP5/MOD3.2 code under the beyond design basis accident(BDBA)of station blackout anticipated transient without scram(SBO-ATWS).The results show that 49-2 Pool Type Low Temperature Heating Reactor has the minus reactivity feedback effect.With the rising of the temperatures of the fuel and the coolant,the reactor can be subcritical by the effect of the minus reactivity feedback.And then,the residual heat of the core can be removed to the environment through the natural circulation.Therefore,it demonstrates the inherent safety of 49-2 Pool Type Low Temperature Heating Reactor when served as low temperature heating supply for the city.

关 键 词：泳池堆 RELAP5程序 低温供热堆 自然循环 全厂断电叠加紧急停堆系统失效 

分 类 号：TL411[核科学技术—核技术及应用]