华龙一号旁通释放类事故源项的不确定性分析与应用

Uncertainty Analysis and Application of Source Term under Bypass Release Accident of HPR1000

核电厂严重事故放射性源项分析是核安全领域关注的焦点问题,而源项分析具有很大的不确定性。本文基于最佳估算加不确定性(BEPU)分析方法,采用严重事故一体化分析程序建立华龙一号严重事故分析模型,首次从整个事故进程角度出发,开发出适用于华龙一号严重事故源项不确定性分析的流程,并采用该方法对安全壳旁通释放类进行源项不确定性分析。本文研究内容丰富了华龙一号严重事故源项分析的工作,也为华龙一号三级概率安全分析(PSA)技术的发展奠定了基础。

The radioactive source term analysis of serious accidents in nuclear power plants is the focus of attention in the field of nuclear safety,and the source term analysis has great uncertainty.In this paper,based on the best estimate plus uncertainty(BEPU)analysis method,HPR1000 serious accident analysis model is established by using the integrated serious accident analysis program.For the first time,from the point of view of the whole accident process,a process suitable for source term uncertainty analysis of HPR1000 serious accident is developed,and this method is used to analyze the source term uncertainty of containment bypass release category.The research content of this paper enriches the source term analysis of the serious accident of HPR1000,and also lays a foundation for the development of the three-level probabilistic safety analysis(PSA)technology of HPR1000.