方家山核电厂主泵轴密封水系统运行分析

Analysis of Operation of Reactor Coolant Pump Shaft Seal System in Fangjiashan NPP

应用ANDRITZ冷却剂泵轴密封系统功能性试验中所得到的运行数据,分析轴封注入水密封的风险,主泵阀门状态改变对主泵运行的影响,主泵轴密封系统各级参数的变化对主泵启动及运行的影响。结果表明,轴封注入水密封存在一定的运行风险;主系统压力对轴密封注入水的高、低压泄漏流量影响不大;主系统的压力值应高于2.75 MPa时,主泵启动才是安全的。

This paper describes the ANDRITZ coolant pump shaft seal system of Fangjiashan nuclear power plant by using the operation data obtained in the functional experiments. The paper also analyzes the operational risk of seal injection water, the effects on the running main pump when the main valve status is changed, and, in addition, the effects on the starting or running main pump when each level of main shaft seal system's parameters is changed. The results show that the seal injection water has certain operational risks, while the main system pressure has little effect on the high or low pressure leakage of the seal injection water. The main system pressure should be higher than 2.75 MPa in order to make it safe when the main pump is started.