百万千瓦核电机组凝结水再循环管道振动处理

Disposal of the Vibration of a Condensate Water Recirculation Pipeline in a 1000 MW Nuclear Power Station

介绍了红沿河核电站1号机组及阳江核电站1号机组发生的凝结水系统再循环管线振动发生的现象及处理过程:红沿河核电1号机凝结水系统再循环管道在调试期间发生振动,再循环阀门阀杆断裂,通过振源分析,确认再循环阀门选型不合适造成阀后汽蚀,通过更改合适的阀门类型解决;阳江核电1号机组调试过程中发生的凝结水再循环管道振动情况,通过振源分析,确认系统运行超出了设计工况,造成阀后流体闪蒸,通过增加孔板解决。

The phenomena and treatment process of the vibration occurred to the recirculation pipelines in the condensate water system of the unit No. 1 in Hongyanhe Nuclear Power Station and Yangjiang Nuclear Power Station were described.Vibration occurred to the recirculation pipeline in the condensate water system of the unit No. 1 in Hongyanhe Nuclear Power Station during its commissioning period and the valve rod of the recirculation valve was broken. Through an analysis of the vibration sources,it has been confirmed that the type selection of the circulation valve is not proper and cavitation after the valve results. It can be solved by replacing it with a new valve of a proper type. Vibration occurred to the condensate water recirculation pipeline during the commissioning of the unit No. 1 in Yangjiang Nuclear Power Station. Through an analysis of the vibration sources,it has been confirmed that the condensate water system had been operating beyond its design operating condition,thus resulting in a flashing of the fluid after the valve and it can be solved by additionally installing an orifice plate.