|Power Reactor||Event Number: 40764|
Region: 1 State: NJ
Unit: [ ]  [ ]
RX Type:  W-4-LP, W-4-LP
NRC Notified By: STEVE SAUER
HQ OPS Officer: JOHN MacKINNON
|Notification Date: 05/21/2004
Notification Time: 14:50 [ET]
Event Date: 05/21/2004
Event Time: 13:15 [EDT]
Last Update Date: 05/21/2004
|Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
JOHN CARUSO (R1)
|Unit||SCRAM Code||RX CRIT||Initial PWR||Initial RX Mode||Current PWR||Current RX Mode|
|2||N||Y||90||Power Operation||60||Power Operation|
|TECHNICAL SPECIFICATION SHUTDOWN
A unit shutdown was commenced to comply with the technical specification for containment integrity. A service water isolation valve supplying the turbine generator area lost power when the 2B vital bus 230v transformer failed at 1147 on 5/21/04. This results in entry into a restore in 1 hour or hot shutdown in 6 hours LCO (18.104.22.168) since the valve cannot be isolated and maintain the unit in service. The failure of the transformer is currently under investigation. A power reduction of 20% per hour is currently in progress.
Other equipment affected by the transformer loss, various containment isolation valves, 2B emergency diesel generator, 22 chiller, 22 and 24 containment fan coil units, and 23 and 24 service water pumps. Prior to the event the only safety related equipment out of service was the service 23 service water pump that was out for planned maintenance. There were no personnel injuries as a result of this event.
The NRC Resident Inspector was notified of this event by the licensee.