At 2144 EST, on 11/20/2019, all three
auxiliary feedwater pumps for Unit 2 were declared Inoperable due to
check valve leakage causing the turbine driven
auxiliary feedwater pump to rotate backwards and subsequently trip. At this time, two of the Unit 1 motor driven
auxiliary feedwater pumps were still able to provide cross-tied
feedwater in the event of a design basis accident.
At 2203 EST, the two motor driven auxiliary feedwater pumps on Unit 2 were declared operable once the discharge isolation valves for the turbine driven auxiliary feedwater pump were closed, thus preventing backflow through the turbine driven auxiliary feedwater pump and ensuring forward flow of the motor driven auxiliary feedwater pumps.
This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D) for an event or condition that could have prevented the fulfillment of a safety function.
There is no impact on the health and safety of the public or plant personnel.
The NRC Resident Inspector has been notified.
Unit 2 is in a 72-hour
LCO 3.6.F.1 for turbine driven
auxiliary feedwater pump inoperability.
