核电厂安全壳超压失效概率及过滤排放系统启动压力分析

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Study of Containment Over-Pressure Fragility Curve and Analysis of Opening Pressure for Containment Filtration and Exhaust System

China Nuclear Power Technology Research Institute, Shenzhen, Gangdong, 518026, China

摘要: 根据中国改进型三环路压水堆(CPR1000)核电厂安全壳设计特点,采用理论分析及有限元分析方法,得到CPR1000核电厂安全壳超压失效概率曲线,给出CPR1000核电厂安全壳过滤排放系统启动压力的推荐值,分析不同的过滤排放系统启动压力下相应的放射性释放量。结果表明,在确保安全壳失效概率很低(5%)的前提下,CPR1000核电厂安全壳过滤排放系统的启动压力可取为0.71 MPa(表压),放射性物质向环境释放的时间随之推迟1 d以上,累积放射性活度明显降低。
- 严重事故 /
- 失效概率曲线 /
- CPR1000 /
- 过滤排放系统
Abstract: Based on the results of international researches and design feature of CPR1000 containment,the fragility curve for CPR1000 containment is studied.The operation pressure to put Containment Filtration and Exhaust System（EUF） into service is proposed.With different operation pressures,the radiological con-sequences has been compared.The results show that the pressure threshold for EUF operation can increase to 0.71MPa（g） and the starting time of the EUF is delayed about 1day and the accumulated activity to the envi-ronment is also decreased definitely.
- Severe accident /
- Fragility curve /
- CPR1000 /
- Containment filtration and exhaust system