介绍了压水堆核电厂反应堆一回路抽真空排气方法,以及由带密封环反应堆压力容器临时顶盖、抽真空排气台架组成的抽真空排气装置设计方案和应用过程。利用该装置,在国内首次实现核电厂大修低低水位期间的反应堆一回路抽真空排气,取消了原有动排气过程,可缩短大修关键路径时间10余小时,降低反应堆冷却剂系统主泵损坏风险,提高电厂运行经济性和安全性。 The method of vacuum evacuation of the first circuit of PWR nuclear power plant and the design and application process of evacuation evacuation device consisting of temporary top pressure vessel with sealed ring reactor and evacuation exhaust bench are introduced. With this device, the first reactor of the reactor during the time of overhauling low water level in China is evacuated and evacuated, the original moving exhaust process is canceled, the key path time of overhauling can be shortened by more than 10 hours, and the main pump of the reactor coolant system can be reduced Damaging the risks and improving the operation economy and safety of power plants.