先进压水堆核电厂LOCA叠加ATWS事故分析及敏感性研究  

Accident Analysis and Sensitivity Study of LOCA Superimposed ATWS in Advanced PWR Nuclear Power Plant

作　　者：王业辉 潘昕怿 张盼 WANG Yehui;PAN Xinyi;ZHANG Pan(Nuclear and Radiation Safety Center,Beijing 100082,China)

机构地区：[1]生态环境部核与辐射安全中心,北京100082

出　　处：《核科学与工程》2024年第5期1172-1177,共6页Nuclear Science and Engineering

基　　金：国家科技重点研发计划资助项目(No.2019YFB1900805)。

摘　　要：为了分析核电厂发生冷却剂丧失事故(LOCA)叠加未能紧急停堆预期运行瞬态(ATWS)事故后的瞬态响应,研究不同事故情景下的缓解路径,本文以国产先进压水堆核电厂为研究对象,利用系统分析程序建立了核电厂模型,研究了该事故下核电厂的瞬态特性,并开展了敏感性分析,得出如下结论:对于极限小破口工况,则至少需要1个稳压器安全阀和1列应急给水系统有效,才能避免事故早期一回路超压;对于相对较大的小破口工况,至少需要1列应急给水、1列中压安注系统和1列应急硼注入系统有效才能缓解事故;对于中破口工况,若破口尺寸相对较小,则需要1列应急给水、1列中压安注系统、1个安注箱、1列低压安注系统和1列应急硼注入系统来缓解事故;若破口尺寸较大,则只需要1列中压安注系统、1个安注箱、1列低压安注系统有效就可以缓解事故。In order to analyze the transient response of nuclear power plant after the LOCA superimposed anticipated transients without scram,and study the accident mitigation path under different accident scenarios,this paper takes domestic advanced PWR nuclear power plant as the case of study,establishes the nuclear power plant model by using system analysis code,and studies the transient characteristics of the power plant under the accident condition.The sensitivity analysis is carried out,and the conclusion is as follows.For the extreme small break condition,at least one pressurizer safety valve and one emergency water supply system should be effective to avoid the primary overpressure in the early stage of the accident.For relatively large small break conditions,at least one emergency water supply system,one medium pressure safety injection system and one emergency boron injection system should be effective to alleviate the accident.For the medium break condition,if the size of the break is relatively small,it is necessary to have one emergency water supply system,one medium pressure safety injection system,one accumulator,one low pressure safety injection system and one emergency boron injection system to alleviate the accident.If the size of the break is large,only one medium pressure safety injection system,one accumulator,and one low pressure safety injection system are required to alleviate the accident.

关 键 词：冷却剂丧失事故 未能紧急停堆预期运行瞬态 事故分析 

分 类 号：TL99[核科学技术—核技术及应用]