ENS 46315

v t e ENS Event
14:41 Oct 7, 2010
Title	Loss of 4160 Volt Safety Bus
Event Description	Oyster Creek experienced a loss of 4160 volt 'D' safety bus. Emergency diesel generator number 2 fast started and re-powered the 'D' bus, as expected. All other safety systems responded as expected. Investigation into the loss of 'D' 4160 volt safety bus is in progress. The licensee was performing grid undervoltage testing on the 'D' 4160 at the time of the event. The licensee has staffed the Outage Control Center. There is no affect on the other 4160 volt bus. Offsite power is normal. Plant risk was 'yellow' prior to and following the event as a result of Reactor Building Closed Cooling Water Pump 1-2 out of service for planned maintenance. The licensee notified the NRC Resident Inspector.

ENS 46315 +/-
Where
Oyster Creek New Jersey (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+-2.03 h-0.0846 days <br />-0.0121 weeks <br />-0.00278 months <br />)
Opened:	Joshua Sistak 12:39 Oct 7, 2010
NRC Officer:	Joe O'Hara
Last Updated:	Oct 7, 2010
46315 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Oyster Creek with 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2017-07-03T14:15:00 [Table view]
[ENS list for Oyster Creek]

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