SBLOCA叠加高压安注失效事故全范围事故分析

Analysis for Full Range of Accident on SBLOCA Plus Loss of HHSI

目前,我国现有"二代加"压水堆核电厂的事故分析通常只分析至可控状态,但福岛核电厂事故提示,事故分析仅分析至可控阶段不足以揭示事故后果的全面影响,必须进行全范围事故分析。小破口失水事故(SBLOCA)在核电厂堆芯熔化频率(CDF)中的贡献是概率最大的事故序列之一。本文采用CATHARE程序详细分析了"二代加"压水堆核电厂发生SBLOCA叠加高压安注(HHSI)失效状况下的全范围事故,根据该分析结果初步识别出了现有核电厂安全设计的薄弱环节,对此,本文提出了初步改进建议措施。

So far,the accident for Chinese current'two generation plus'pressurized water reactor nuclear power plant is usually only analyzed to the controlled condition.But Fukushima accident indicated that this analysis was not comprehensive,so the full range of accident should be analyzed.SBLOCA makes the greatest contribution for core damage frequency(CDF).The CATHARE was used to analyse the full range of accident for SBLOCA plus loss of HHSI which happens at the Chinese current'two generation plus'pressurized water reactor,and the analysis results were acquired.Based on the results,the weaknesses of the existing power plant were pointed out,and the improvement measures were given.