ENS 43796

v t e ENS Event
10:12 Sep 27, 2007
Title	Invalid Emergency Diesel Generator Start
Event Description	This telephone notification is being made under 10 CFR 50.73(a)(2)(iv)(A) in lieu of an LER submittal, pursuant to NUREG-1022, Section 3.2.6. At 0512 on 09/27/07 the 'A' Diesel Generator (DG) was being restored to its normal lineup following a maintenance run. During restoration per Station Operating Procedure SOP-306, an under instruction Operations trainee inadvertently pressed the 'Emergency Start' pushbutton instead of verifying the 'Emergency Start' status light was clear as required by Step 2.4.b of the procedure. This resulted in a start of the 'A' DG in the emergency mode. Following an equipment walk down, the 'A' DG was then secured at 0518. This inadvertent start of the 'A' DG was determined to be an invalid actuation since it was not the result of a valid signal nor an intentional manual actuation. This inadvertent start was complete, in that the DG started and ran, however; the bus was not required to be loaded and the output breaker did not close. Although inadvertently actuated, the 'A' DG started successfully and would have been able to function in the emergency mode if it had been required. The licensee notified the NRC Resident Inspector.

ENS 43796 +/-
Where
Summer South Carolina (NRC Region 2)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+1301.07 h54.211 days <br />7.744 weeks <br />1.782 months <br />)
Opened:	Jason Weatherby 16:16 Nov 20, 2007
NRC Officer:	Pete Snyder
Last Updated:	Nov 20, 2007
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Summer with 10 CFR 50.73(a)(1), Submit an LER
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