M310电厂小破口失水事故最佳估算加不确定性分析研究

Best-estimation Plus Uncertainty Analysis of Small Break Superposition Loss with Off-Site Power Accident in M310 Power Plant

最佳估算加不确定性分析(BEPU)方法已成为国内外对核电厂进行事故分析或安全评审的重要方式。对M310电厂小破口叠加失去厂外电事故工况进行不确定性量化分析。采用RELAP5程序建立M310电厂模型,并进行稳态计算和事故瞬态验证。建立SBLOCA重要参数表,进行非参数统计抽样和不确定性分析,计算得到目标参数的不确定性输出区间,并通过敏感性分析评估了影响较大的输入参数。

The Best-estimate Plus Uncertainty Analysis(BEPU)method has become an important method for accident analysis or safety review of nuclear power plants.In this paper,the uncertainty analysis of small break superposition loss with off-site power accident condition in M310 power plant is carried out.The simulation model of the power plant is established by using the RELAP5 program,and the steady state calculation and transient verification under accident conditions are performed.The important parameter table of small break superposition loss with off-site power accident condition is established,and the non-parametric statistical sampling method and uncertainty analysis are performed,so that the uncertainty output interval of the target parameter is obtained.The influential input parameters are evaluated by sensitivity analysis.