ENS 44807

v t e ENS Event
15:17 Jan 27, 2009
Title	Manual Reactor Trip Due to Loss of 4160V Bus
Event Description	Calibrations of the 'A' Unit 4160V Switchgear metering were in progress when the 'A' Unit 4160V Bus tripped. This resulted in the loss of the 'A' Feedwater Booster Pump (FWBP) and 'A' Condensate Pump (CDP). The Operating crew identified the loss of the 'A' FWBP with increasing RCS pressure and manually tripped the reactor. There were no other safety system actuations and the plant is stable at normal post-trip temperature and pressure. All rods inserted during the trip. Decay heat is being removed via steam dumps to the condenser. The electrical grid is stable with plant loads being supplied by offsite power via the startup transformer. Both vital busses are being powered from offsite. During the transient, main steam relief valves did lift but have been reseated. The NRC Resident Inspector has been notified.

ENS 44807 +/-
Where
Crystal River Florida (NRC Region 2)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
LER:	05000302/LER-2009-001 Re Manual Reactor Trip Due to Loss of a 4160V Unit Bus Loads Caused by Incorrectly Connected Test Leads
Time - Person (Reporting Time:+-2.6 h-0.108 days <br />-0.0155 weeks <br />-0.00356 months <br />)
Opened:	John Taylor 12:41 Jan 27, 2009
NRC Officer:	Howie Crouch
Last Updated:	Jan 27, 2009
44807 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Crystal River with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2009-08-24T15:00:00 [Table view]
[ENS list for Crystal River]

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