05000387/LER-1982-072-03, /03L-0:on 821210,while Performing Surveillance, One Control Rod Would Not Indicate at One Position.Possibly Caused by Intermittent Fault on Circuit Board.Printed Circuit Board Reinstalled

/03L-0:on 821210,while Performing Surveillance, One Control Rod Would Not Indicate at One Position.Possibly Caused by Intermittent Fault on Circuit Board.Printed Circuit Board Reinstalled

ML20028D314
Person / Time
Site:	Susquehanna
Issue date:	01/07/1983
From:	Mitchell D PENNSYLVANIA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028D310	List: 05000387/LER-1982-072, Forwards LER 82-072/03L-0 05000387/LER-1982-072-03, /03L-0:on 821210,while Performing Surveillance, One Control Rod Would Not Indicate at One Position.Possibly Caused by Intermittent Fault on Circuit Board.Printed Circuit Board Reinstalled
References
LER-82-072-03L, LER-82-72-3L, NUDOCS 8301170323
Download: ML20028D314 (1)

LER-1982-072, /03L-0:on 821210,while Performing Surveillance, One Control Rod Would Not Indicate at One Position.Possibly Caused by Intermittent Fault on Circuit Board.Printed Circuit Board Reinstalled

Event date:
Report date:
3871982072R03 - NRC Website

text

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MXC FGETM 359 U.S. NUCLEA99 R20ULATOftY COMMl32 ION APPJEOVXD BY OMW

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LICENSEE EVENT REPORT l' :{IU'4 3...:

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES l 0 l2 l l During the Startup Testing Program, while performing a surveillance. it was l

l 0 l3 l l determined that one control rod would not indicate at one position. This is l

lo l4 l l reportable per Technical Specification 6.9.1.9.b.

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CAUSE DESCRIPTloN AND CORRECTIVE ACTIONS h [IFl(_During investigation, the event could not be reproduced.

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l1l1ll taken was the removal and re-installation of a printed circuit board. Upon l

l i l 2 l l powering up, position indication worked properly. Possible problems were l

l 113 l l either an intermittent continuity fault on the circuit board or a CRD reed l

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