ML19257B485

LER 79-044/03L-0:on 791212,during Surveillance Testing, Channel B Indicated Axial Flux Offset Out of Spec.Problem Intermittent.Possibly Caused by Linear Range Channel B Lower Subchannel Detector

ML19257B485
Person / Time
Site:	Calvert Cliffs
Issue date:	01/10/1980
From:	Lagiewski J, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257B481	List: ML19257B480 ML19257B485
References
LER-79-044-03L-01, LER-79-44-3L-1, NUDOCS 8001160407
Download: ML19257B485 (1)

Text

NRC FORM 366 U. 5. NUCLk AH MkUULAT UH Y COMMlbblON (7 77)

- LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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60 61 DOCKET NUMB ER 68 69 EVENT D ATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h a 2 i Durino surveillance testino at 0945 it was disenvprod that channpl "R" o 3 I indicated axial flux offset was out of soecification. per T S. 3.3.1.1. I o i4 l the channel was bypassed and readjusted. Channel "B" axial flux offset  ;

O s I was returned to service at 0955. The redundant channels were operable I o 6 I throunhout the event. This is not a recetitive occurrence. 1 0 7 I I

l O 8 l 80 7 8 9 E CODE SUSC E COMPONENT CODE SUSCODE S E 7

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O I The oroblem has continued intermittentiv. The susoected cause is Linear i

- 1 i l Ranno channel B Lower Subchannel detector. This inn chamber's notnut is ' I

_. , 2 l being observed periodically. Maintenance Request 0-79-4817 is open for l i 3 i further action. l i 4 l 1 _

., 7 8 9 80 ST  % POWE R OTHER STATUS dis O RY DISCOVERY DESCRIPTION i 5 l E,,j @ l 1l 0 l 0 l @ l NA l lAl@l Suryeillance Test l A T1VITY CO TENT OF RELEASE AMOUNT OF ACTIVITY L'OCATICN OF RELEASE 7

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PERSONNEL EXPOSURES TYPE DESCRIPTION

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. L. Lagiewski/ P. G. Rizzo PHONE: