ML19312E384

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LER 80-027/03L-0:on 800506,during Performance of Surveillance Testing,Discovered Channel B Axial Flux Offset Not Indicating Properly.Caused by Dirty Connector on Deviation Card A-5.Connector Cleaned
ML19312E384
Person / Time
Site: Calvert Cliffs Constellation icon.png
Issue date: 06/02/1980
From: Hinkle L, Lagiewski J
BALTIMORE GAS & ELECTRIC CO.
To: Hinkle L
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19312E382 List:
References
LER-80-027-03L, LER-80-27-3L, NUDOCS 8006040352
Download: ML19312E384 (1)


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10111 SC% 60l l l@l 0 15 10 10 10 13 1168 1869 l@lEVENT 01 DATE 51 01 61 81 O REPORT 74 75 l@l 01 QATE 61 01 80 21 8 l O i 8 61 DOCK ET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 : 21 l During the perfomance of surveillance testing, at 1100, it was discovered l 1 o 131 I that Channel B Axial Flux Offset was not indicatina crocerly. All Channel l 10,41 i B RPS Trip Units were bypassed per T.S. 3.3.1.1 for troubleshootina. All l lo isI I Channel B RPS Trip Units were returned to service at 1455. The three l loist I redundant channels remained operable throughout this event. This is not a g l o 17 I I repetitive event. l l

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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h, li t o l I Found incorrect voltace sianal to the axial oower distribution drawer from the l I

l li fil I cower summer and subchannel deviation card ( A-5) of the linear rance nuclear 11 # 2 I I instrument drawer. Accarent cause was dirty connector of the A-5 card. The I

l i j a l I connection was cleanod wi +h e a +i e f a r-tnev roc til te No further eneror tivo l 1

I i i 41 I action is reouired. 80 7 8 9 S  % POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION li 151 (_E.j@ l il Ol Ol@l P!A i [_3.J@l SURVEILLANCE TEST l ACTIVITY CO TENT CSRELEASE AMOUNT OF ACTivtTY LOCATION CF RELEASE

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