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在研究稳压器汽腔小破口失水事故过程物理现象的基础上,对北京核电厂模拟培训中心模拟器中的反应堆冷却剂系统数学模型进行了改进,将两相流模拟分支加入到该系统模拟程序中去,得到了满意的模拟效果。文中给出了改进前、后模拟效果的对比,以及改进的结果与三里岛事故记录的对比。
On the basis of studying the physical phenomenon of the small-nozzle water-loss accident in the regulator, the mathematical model of reactor coolant system in simulator of Beijing Nuclear Power Plant Simulation Training Center was improved, and the two-phase flow simulation branch was added to the System simulation program to get a satisfactory simulation results. The paper gives the comparison of the simulation results before and after the improvement and the comparison between the improved results and the records of the Three Mile Island accident.