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核电站主蒸汽输送管线断裂(MSLB)造成二次侧系统排热增加,叠加蒸汽发生器传热管破裂(SGTR)和安注失效是一个复杂的事故过程,按照假定条件,使用最新的严重事故分析软件MAAP5(Modular Accident Analysis Program 5)对该典型的严重事故序列进行建模和分析,计算得到的重要事件的时间节点和一些重要的热工水力参数随时间变化的结果符合整体事故序列预期趋势。通过堆芯失效过程、堆内事故进展的时间序列和事故后果的严重程度的仿真研究,得到了一些重要参数随时间变化的结果,相关数据结果可用于核电站全范围模拟机(FSS)培训和严重事故机理的分析和研究,也可为有关部门对严重事故的预防以及事故后严重事故缓解措施的制定提供重要的依据。
The main steam transfer pipeline (MSLB) at the nuclear power station caused the increase of heat discharge in the secondary system. The superposition of steam generator tube rupture (SGTR) and safety failure was a complicated accident process. According to the assumed conditions, the latest serious accident analysis The software MAAP5 (Modular Accident Analysis Program 5) models and analyzes this typical sequence of serious accidents. The calculated time series of important events and the results of some important thermal-hydraulic parameters over time are in line with the expected trend of the overall accident sequence. Through the simulation of the failure process of the core, the time series of the accident progress in the reactor and the severity of the accident consequence, the results of some important parameters over time are obtained. The results of the relevant data can be used in the training and severe training of full scale FSS Analysis and research on accident mechanism can also provide important basis for the prevention and control of serious accidents and the formulation of serious accident mitigation measures after accidents.