ML19259A758

LER 78-058/03L-0 on 781218:during Surveillance Testing on No 11 Diesel Generator,Generator Room Ventilation Fan Failed to Start.A B Phase Overload Had Tripped & Was Reset.Tests on Fan Showed Normal Current & No Mechanical Damage

ML19259A758
Person / Time
Site:	Calvert Cliffs
Issue date:	01/04/1979
From:	Carroll J, Romney K BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19259A755	List: ML19259A754 ML19259A758
References
LER-78-058-03L, LER-78-58-3L, NUDOCS 7901100267
Download: ML19259A758 (1)

Text

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7 8 61 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND'PADBAtlLE CONSEQUENCES h FirTTI IDuring perfomance of surveillance testing on 11 diesel generator the genera- l 10 i31 l tor room ventilation fan failed to start at 0928. 11 diesel generator was l 0 4 imediately shutdown. At 0940 a "B" phase overload was found to be tripped l F6 T'irl and was reset. The fan was started and 11 diesel satisfactorily tested at i O s l0949. 12 diesel generator and two ties with the'offsite transmission network O 7 I remained operable throughout this event. LERs 77-3 (U-1) and 77-23 (U-2)

O 8 describe similar events. I CODE SUBC E COMPONENT CODE SUBCODE ZlZlZlZlZ Zl@ ]g h Eg SU O 9 l A l A l@ y@ l Zl@

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^ 'U"lER9lg 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O l Tests conducted on the ventilating fan showed normal current and no mechanical l ii sii damage. The fan was cycled numerous times and no abnomal conditions were i

,, ,,,i ound. f No further corrective action is necessary.

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ST S  % POWER OTHER STATUS DI Y DISCOV Y DESCRIPTION 0l 0l 3lgl NA lBlgl SurveillanceI"est i s lCl@ l l A TlVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l l NA l IITil8[9Z ] @ l Zl@l

1. 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER T PE DESCRIPTION i 7 l0l0l0l@;Zl@l N l PERSONNe'L imu'!iES NUMBER DESCRIPTION i a 0l0l0l@l NA LOSS OF OR D AGE TO FACILITY

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