05000318/LER-1979-040-03, /03L-0:on 791012,Balser Voltage Regulator Board Showed Signs of Having Overheated Resistor in Voltage Feedback Circuit.Cause Undetermined.Board Completely Replaced

/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: 05000318/LER-1979-040, Forwards LER 79-040/03L-0 05000318/LER-1979-040-03, /03L-0:on 791012,Balser Voltage Regulator Board Showed Signs of Having Overheated Resistor in Voltage Feedback Circuit.Cause Undetermined.Board Completely Replaced
References
LER-79-040-03L-01, LER-79-40-3L-1, NUDOCS 7911140279
Download: ML19210C446 (1)

LER-1979-040, /03L-0:on 791012,Balser Voltage Regulator Board Showed Signs of Having Overheated Resistor in Voltage Feedback Circuit.Cause Undetermined.Board Completely Replaced

Event date:
Report date:
3181979040R03 - NRC Website

text

..

- 771 LICENSEE EVENT REPORT CCNTROL BLOCK: l l

l l

l 1

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI i

e I" In Ic Ir IN 19 l@l o f 0 -l01010 0101-101 Ol@laill 111111@l i

l@

~

1 8 9 LICENSEE CODE to

'S LICENSE Nuv6ER

5

6 LICENSE TYPE Jo

$7 CAT $8 CN'T sc 5% lL j@l015 1010 10 13 il 18 }@l 1101 1 l ? ! 71 o 'i@l 1 1 1 I n l s I 7 } o l@

2 8

60 61 OOCK ET NUVB E n 68 69 EVENT 0 ATE 74 75 RE80RT C ATE 80 EVENT OESCRIPTION AND PACB A9LE CCNSECUENCES h

hile investicatino d21 diesel cenerator voltace reculation 3

3 3

i oroblers, it was necessary to take #21 diesel cenerator out of I

l service from 1240 to 1435, October 12, 1079, to recair the voltace i

J 4

J i s i i reculator. The acerability of the receinino A.C. sources was da-en-I i strated as recuired by T.S. 3.8.1.1.

This is ret a renatitiva 1

4 I

3 7

[ occurrence.

1 O IM l

30 SYS?EU CALSE C A L/S E C O'/ 8 V ALw E CCOE 000E S.PCO E C0YPC*.ENT CODE SLSCO E SUSCO:E ois lElEl@ lEl@

a l@ lf IN lc IT lo lo l @ lY lh l 7lh e

9

'O 11 13 78 W

20 SEOLENT:At OC0ua n E '.CE AE8CRT G E VisiCN

_ EVENT YE AR A EPORT NO.

COOE TvPE NO.

O " lea 90 17 19 I l-J ln ja nl l/l I nl,l lil l-l

!n i y,jE;

_ :i

2 a

4

.6

s

a w

u TA E

~A T O*

O PLANT

• T dCLRS S B' iT 80R 1 9.

5 PDLIE

• 4AN FACT MEA lCl@lZl@

lZl@

l Z l@

I nl Ol 01 01 IN l@

l Yl@

lA l@

l8 nl 0l 9th J4 45 J6 3 ',

40 41 42 43 44 47 4

CAUSE DESCRIPTION ANO CCARECTIVE ACTICNS h l The Basler voltace reculator board d32101-102 showed sinns of havinn an 1

i o

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

y l the overheatino could not be deter-inat Tha vn1+aca rani 13+nr knard I

i 2

3 l l was reolaced in its entiretv.

This is not a ceneric croblem and no I

1 I

1 further action is clanned.

i 4

80 s 2 STA $

. POWER OTwER STATUS 5SCOV Ry CISCOVE Av OESCAiPTION l

l E l@ l 1 0l Ol@

N/A l

lAl@iOnerator observation I

i s

ACTt'/t TV CONTENT OraELEASE AMOUNT OF ACTiviT)

LOC ATIO*. Cp mELE ASE aEtE ASe@O l El@

N/A i

l N/A I

lZl 1

6 8 9 to 11 44 45 80 PERSONNEL EXPOSymES N U'/ B E R TYPE

DESCRIPTION

1010101@lZ!@l N/A i

7 PE ASONNE L INJURIES y<,

h NUYBER OESCRIPTION I

10 Oj0]@l N/A i

a 80 8 3 11 12 LOSS OF OR D AY ACE TO F ACILITY TYPE D E SC Rl* TION l

lZl@l N/A 9

80 8 9 10 7911140 3 l NRC UsE ONLY

[@lctsCAiPTiON @

'ueticity N/A I

li IlilllIil12 o

68 69 80 3 8 3 to NAME OF PAEPAAER PHONE. (301122a-70a'4 /7acc 2,

O

• R*

OUOI