摘要
CPR1000机组中压安注箱的设计目的在于在失水事故期间在氮气压力的作用下短时间内淹没堆芯,从而避免燃料熔化和堆芯损坏。中压安注箱的氮气压力是失水事故分析的关键安全参数。目前,CPR1000机组在实际运行中关于中压安注箱的压力控制范围未考虑仪表测量不确定度(0.6 bar),存在中压安注箱的实际压力控制范围超出安全分析假设的潜在风险,可能影响中压安注箱的安全功能。本文基于对上述问题的安全分析和外部调研,提出了针对核电厂执照文件、运行程序及报警设置等方面的改进建议,旨在保障机组的安全运行,分析认为这些改进是可行的。
The CPR1000 unit accumulators is designed to flood the core in a short time under nitrogen pressure in the event of a loss of coolant accident to avoid fuel meltdown and core damage.The nitrogen pressure of the accumulators is the key safety parameter in the analysis of loss of coolant accident.At present,the instrument measurement uncertainty(0.6 bar)is not considered in the control range of pressure of the accumulators in the actual operation of CPR1000 unit,it has a potential risk that the actual pressure control range of the accumulators exceeds the assumptions of safety analysis,which may affect the safety function of accumulators.Based on the safety analysis of the above problem and external investigation,this paper puts forward the improvement suggestions for nuclear power plant license documents,operation procedure and alarm setting,aiming at ensuring the safe operation of unit,and the analysis shows that these improvements are feasible.
作者
杨腊腊
邵辉
陈秋炀
Yang Lala;Shao Hui;Chen Qiuyang(Suzhou Nuclear Power Research Institute,Suzhou 215004,China)
出处
《核安全》
2024年第4期120-124,共5页
Nuclear Safety
关键词
中压安注箱
压力范围
测量不确定度
改进建议
accumulator
pressure range
measurement uncertainty
improvement suggestions
