稳压器安全阀卡开导致的堆芯熔化事故

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Study on Core Melting Accident Induced by One Stuck-Open Pressurizer Safety Valve

School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 200240, China

摘要: 采用SCDAP/RELAP5程序分析了大亚湾核电站蒸汽发生器(SG)给水完全丧失后叠加稳压器安全阀卡开导致的堆芯熔化事故。基准事故分析的结果表明,该事故具有潜在的高压熔堆风险。缓解措施的研究表明,"充-排"措施可以有效地冷却堆芯。
- 严重事故 /
- 缓解措施 /
- 充-排
Abstract: The core melting accident in DaYa Bay NPP, induced by the total loss of feedwater accident with one stuck-open pressurizer safety valve, is analyzed by using SCDAP/RELAP5 computer code. The analytical results of this base case indicate that it leads to core melting, and has the potential probability of high pressure core melting risk. At the same time, study on the mitigation measures indicates that the feed-bleed measure can cool the core effectively.
- Severe accident /
- Mitigation measure /
- Feed-bleed