05000317/LER-1979-023-03, /03L-0 on 790712:while Withdrawing Group 1 Control Element Assembly,Position Indication for Assembly 65 Stopped Indicating Outward Motion at 42 Inches.Caused by Electronic Failure of Printed Circuit Board.Board Replaced

/03L-0 on 790712:while Withdrawing Group 1 Control Element Assembly,Position Indication for Assembly 65 Stopped Indicating Outward Motion at 42 Inches.Caused by Electronic Failure of Printed Circuit Board.Board Replaced

ML19207A510
Person / Time
Site:	Calvert Cliffs
Issue date:	08/10/1979
From:	Lagiewski J BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19207A508	List: 05000317/LER-1979-023, Forwards LER 79-023/03L-0 05000317/LER-1979-023-03, /03L-0 on 790712:while Withdrawing Group 1 Control Element Assembly,Position Indication for Assembly 65 Stopped Indicating Outward Motion at 42 Inches.Caused by Electronic Failure of Printed Circuit Board.Board Replaced
References
LER-79-023-03L-01, LER-79-23-3L-1, NUDOCS 7908200333
Download: ML19207A510 (8)

LER-1979-023, /03L-0 on 790712:while Withdrawing Group 1 Control Element Assembly,Position Indication for Assembly 65 Stopped Indicating Outward Motion at 42 Inches.Caused by Electronic Failure of Printed Circuit Board.Board Replaced

Event date:
Report date:
3171979023R03 - NRC Website

text

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60 61 DOCKET NUMBER 68 69 EVENT DATE 14 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h l o 12 I 1 At 4:30 o.m. whib withdrawino Grouo 1 CEA's durino cost refueling starton I

o a i testing program, the primary position indication for CEA 65 stonced indicatino 1

l outward motion at 42".

The secondary (or reedswitch) nosition indication i

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I continued to function nomally. Group 1 was fully withdrawn in accordance with I

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l The plant computer did not output position indication for CEA 6_5 due to electronic l

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