丧失交流电源叠加丧失最终热阱事故应对措施分析  

Analysis on Countermeasures for the Accident of Loss of AC Power Plus Loss of Ultimate Heat Sink

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作  者:侯丽强 张明[1] 李峰[1] 刘一泽[1] 罗炜[1] 刘兆东[1] 黎春梅[1] 郑洪涛[1] HOU Liqiang;ZHANG Ming;LI Feng;LIU Yize;LUO Wei;LIU Zhaodong;LI Chunmei;ZHENG Hongtao(Science and Technology on Reactor System Design Technology,Nuclear Power Institute of China,Chengdu of Sichuan Prov.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,四川成都610213

出  处:《核科学与工程》2021年第6期1251-1259,共9页Nuclear Science and Engineering

摘  要:为研究丧失交流电源叠加丧失最终热阱事故应对措施,建立了某先进压水堆的一体化计算模型,针对丧失交流电源叠加丧失最终热阱事故,分析了不同应对措施的缓解效果。结果表明,在丧失交流电源叠加丧失最终热阱事故下,若汽动辅助给水泵可以成功运行,则堆芯热量可以被有效排出,一回路压力、温度、水位将维持在相对稳定的状态;若非能动余热排出系统投入成功,则堆芯热量同样可以被有效排出,一回路压力、温度呈现逐渐下降的变化趋势,堆芯则始终处于淹没状态;若汽动辅助给水泵运行失效且非能动余热排出系统投入失败,一回路压力、温度将会上升,而堆芯则会发生裸露,面临熔毁风险。此外,研究结果也表明,在不同应对措施组合下,丧失交流电源叠加丧失最终热阱事故的应对时间是不同的。可以为先进压水堆优化改进关键技术研究提供支持。In order to analyze the countermeasures for the accident of loss of AC power plus loss of ultimate heat sink,the integrated model of an advanced PWR has been built.As to the accident of loss of AC power plus loss of ultimate heat sink,the mitigation effect of different countermeasures has been analyzed.The results show that in the accident of loss of AC power plus loss of ultimate heat sink,if the steam-driven auxiliary feed water pump works,the heat can be removed effectively and the pressure,temperature and water level of the primary coolant system(PCS)will remain stable.If the passive residual heat removal system(PRS)works,the heat can be removed effectively,the pressure and temperature of the PCS will descend and the core will be covered all the time.If both the steam-driven auxiliary feed water pump and the PRS fail,the pressure and temperature of the PCS will rise and the core will be uncovered,which may lead to the damage of the core.The results also show that the time available for answering the accident of loss of AC power plus loss of ultimate heat sink is different in the cases of different countermeasures.This study can offer technical support for improving the key technique of advanced PWR.

关 键 词:丧失交流电源 丧失最终热阱 先进压水堆 应对措施 

分 类 号:TM623[电气工程—电力系统及自动化]

 

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