05000325/LER-1979-081-03, /03L-0:on 791005,during Normal Operation,Attempt to Start Reactor Bldg Exhaust & Supply Fan C Resulted in Tripping Breaker from Substation E-5 to Motor Control Ctr 1XG.Breaker Reset & Control Ctr re-energized

/03L-0:on 791005,during Normal Operation,Attempt to Start Reactor Bldg Exhaust & Supply Fan C Resulted in Tripping Breaker from Substation E-5 to Motor Control Ctr 1XG.Breaker Reset & Control Ctr re-energized

ML19254F476
Person / Time
Site:	Brunswick
Issue date:	11/01/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19254F473	List: 05000325/LER-1979-081, Forwards LER 79-081/03L-0 05000325/LER-1979-081-03, /03L-0:on 791005,during Normal Operation,Attempt to Start Reactor Bldg Exhaust & Supply Fan C Resulted in Tripping Breaker from Substation E-5 to Motor Control Ctr 1XG.Breaker Reset & Control Ctr re-energized
References
LER-79-081-03L-01, LER-79-81-3L-1, NUDOCS 7911090495
Download: ML19254F476 (1)

LER-1979-081, /03L-0:on 791005,during Normal Operation,Attempt to Start Reactor Bldg Exhaust & Supply Fan C Resulted in Tripping Breaker from Substation E-5 to Motor Control Ctr 1XG.Breaker Reset & Control Ctr re-energized

Event date:
Report date:
3251979081R03 - NRC Website

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NRC FORM 366 (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK:

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l (PLEASE PRINT OR TYFT. ALL REQUIRED INFORMATION) f6Til N IC IB IE le 11 l@l 010 -1010101010

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T Ll@l0l5l0l- 0 l3 l2 l5 @l1 0l 0l 5l 7 9 )@l 1l 1 0llj7l9lg O

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8 EO 61 DOCKET NUMSER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITITl lDuring normal operation, an attempt to start the Reactor Building Exhaust and Supply i fan "C" resulted in tripping the breaker from sub-station E-5 to MCC 1XG. This motor l 0

3 leontrol center supplies power to "A" SIE pump, which was declared inoperable.

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O s ITechnical Specification 3.1.5, 6.9.1.9b l

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.4 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lThe breaker was reset and MCC 1XG was re-energized. The starting and running current l i

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for the fans were ches.ked with no abnormalities noted. This is considered an isolated t g l event and no further action is required.

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NAME OF PREPARER PHONE: