One of Millstone 3’s critical feedwater pumps flunked quarterly surveillance tests twice in a row recently, on July 15 and September 10, the NRC reported in a press release issued today.
“During both tests, the pump started and then unexpectedly stopped,” according to the NRC. “It then restarted without operator intervention and reached rated speed approximately 15 minutes later. The pump has since undergone repairs and been restored to service.”
The NRC pointed out that a Special Inspection it carried out earlier this year found “unrelated issues with the same pump.”
The pump – called the turbine-driven auxiliary feedwater pump – is a component of the reactor’s safety system. Its function is to help cool the reactor following a shutdown.
Posted September 15, 2014