It did in Braidwood, from I think they had leakage in some of their vacuum valves on the secondary side.

我认为它们在次级侧的某些真空阀中有泄漏，这是在布雷德伍德所做的。

youdao

8 min An operator notices that the valves for the backup pumps in the secondary loop are off. He opens the valves. The secondary side now operating normally.

8分钟一个操作员注意到二次回路备用水泵的阀门是关的，于是打开了阀门。二次回路现在运作正常。

youdao

Usually installed in the valve, pressure relief valves, water valves or other devices given the import side, the medium used to remove impurities, to protect the normal use of valves and equipment.

通常安装在减压阀，泄压阀、定水位阀或其它设备的进口端，用来消除介质中的杂质，以保护阀门及设备的正常使用。

youdao

The Environment Agency will also be working on homes and businesses on Greta Side to fit properties with resistance measures such as waterproofing and non-return valves.

BBC: Keswick flood defence work to start