ENS 43318
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ENS Event | |
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15:01 Apr 25, 2007 | |
Title | Loss of Offsite Power While Defueled |
Event Description | While the offsite grid operator was performing electrical switching in the switchyard, Millstone 3 experienced a complete loss of offsite power. The "A" emergency diesel generator started and supplied power to the protected vital train electrical buses. Power to Spent Fuel Pool Cooling, Service Water, and Component Cooling Water was restored. Spent Fuel Pool level was not affected. No radiation was released from the plant. Offsite power was restored to the site at approximately 11:50. The NRC did not escalate response mode for this event.
The licensee notified the NRC Resident Inspector.
The Unusual Event was terminated at 14:27. The electrical lineup has been restored to the shutdown electrical lineup. The licensee notified the NRC Resident Inspector. Notified FEMA (Dwight Fuller), DHS SWO (John Frost), NRR EO (M.J. Ross-Lee), R1DO (Trapp), R2DO (Payne), R3DO (Passehl), R4DO (Smith), and IRD (Cruz). |
Where | |
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Millstone Connecticut (NRC Region 1) | |
Reporting | |
Emergency class: | Unusual Event |
10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
Time - Person (Reporting Time:+-3.42 h-0.143 days <br />-0.0204 weeks <br />-0.00468 months <br />) | |
Opened: | Al Elms 11:36 Apr 25, 2007 |
NRC Officer: | Mark Abramovitz |
Last Updated: | Apr 25, 2007 |
43318 - NRC Website
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