ML19210C446

LER 79-040/03L-0:on 791012,Balser Voltage Regulator Board Showed Signs of Having Overheated Resistor in Voltage Feedback Circuit.Cause Undetermined.Board Completely Replaced

ML19210C446
Person / Time
Site:	Calvert Cliffs
Issue date:	11/06/1979
From:	Bauer E, Heibel R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19210C445	List: ML19210C444 ML19210C446
References
LER-79-040-03L-01, LER-79-40-3L-1, NUDOCS 7911140279
Download: ML19210C446 (1)

Text

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-771 LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI CCNTROL BLOCK: l i

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1 I" InLICENSEE Ic Ir CODE IN 19 l@l o f 0 -l01010 0101-101 Ol@laillLICENSE LICENSE Nuv6ER ;5 ;6 111111@l TYPE Jo i

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8 60 61 OOCK ET NUVB E n 68 69 EVENT 0 ATE EVENT " OESCRIPTION AND PACB A9LE CCNSECUENCES h 3  :  ; hile investicatino d21 diesel cenerator voltace reculation 3 3 i oroblers, it was necessary to take #21 diesel cenerator out of I J 4 l service from 1240 to 1435, October 12, 1079, to recair the voltace i J i s i i reculator. The acerability of the receinino A.C. sources was da-en- I 4 i strated as recuired by T.S. 3.8.1.1. This is ret a renatitiva 1 I

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42 lA 43 l@ l8 nl 0l 9th 44 47 CAUSE DESCRIPTION ANO CCARECTIVE ACTICNS h 1

i o l The Basler voltace reculator board d32101-102 showed sinns of havinn an

, y overheated resistor (P.-25) in its voltace feedback circuit, the cause of j I

i 2 l the overheatino could not be deter-inat Tha vn1+aca rani 13+nr knard 1

3 l l was reolaced in its entiretv. This is not a ceneric croblem and no _ ,_ ,

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i 4 1 further action is clanned. 80 s 2 STA $ . POWER OTwER STATUS 5SCOV Ry CISCOVE Av OESCAiPTION '

l N/A I i s l E l@ l 1 0l Ol@ l lAl@iOnerator observation ACTt'/t TV CONTENT LOC ATIO*. Cp mELE ASE OraELEASE AMOUNT OF ACTiviT) lZl ASe@O l N/A i l N/A I 1 6 aEtE 8 9 to 11 El@ 44 45 80 PERSONNEL EXPOSymES N U'/ B E R TYPE DESCRIPTION i 7 1010101@lZ!@l N/A PE ASONNE L INJURIES y<,

• NUYBER OESCRIPTION h i a 10 Oj0]@l N/A 80 I

8 3 11 12 LOSS OF OR D AY ACE TO F ACILITY TYPE D E SC Rl* TION l

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'ueticity 7911140 3 l NRC UsE ONLY

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[@lctsCAiPTiON N/A @ I li IlilllIil12 68 69 80 3 8 3 to NAME OF PAEPAAER

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