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基于100D主泵和ANDRITZ主泵的差异,分析主泵相似特性曲线和自由容积的变化对失水事故(LOCA)后果的影响。针对岭澳核电站二期反应堆冷却剂系统,应用CATHARE GB程序和CONPATE4程序分析大破口LOCA事故堆芯热工水力后果;应用ATHIS和FORCET程序分析失水事故喷放阶段的反应堆冷却剂主管道水力载荷。结果表明,主泵相似特性曲线的变化对大LOCA事故再淹没阶段的堆芯热工特性影响很大,采用不同主泵时的最高峰值包壳温度(PCT)相差很大;而主泵自由容积对失水事故喷放阶段的卸压波传递影响较大,导致采用不同主泵时的反应堆冷却剂主管道水力载荷有所不同。
Based on the differences between main pump 100D and ANDRITZ main pump, the influence of the change of free-volume and the characteristic curve of main pump on the consequence of loss of water (LOCA) is analyzed. In view of the second phase reactor coolant system of Ling Ao Nuclear Power Station, the CATHARE GB program and the CONPATE4 program were used to analyze the thermal and hydraulic consequences of a large-break LOCA accident core. The ATHIS and FORCET programs were used to analyze the hydraulic load . The results show that the change of the characteristic curve of the main pump has a great influence on the core thermal characteristics during the submergence phase of a large LOCA accident. The maximum peak shell temperature (PCT) varies greatly with different main pumps. The main pump free volume Which has a great influence on pressure relief wave transmission during the discharge phase of water loss accident, resulting in different hydraulic loads of the main reactor coolant pipes when using different main pumps.