ML19343C002

LER 81-006/03L-0:on 810112,during Normal Operation,Rod Block Monitor B Failed to Null When Control Rod Selected.Caused by Relay Failure Due to End of Natural Life.Relay Board Replaced & Monitor Returned to Svc

ML19343C002
Person / Time
Site:	FitzPatrick
Issue date:	02/11/1981
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19343C001	List: ML19343B999 ML19343C002
References
LER-81-006-03L, LER-81-6-3L, NUDOCS 8102180481
Download: ML19343C002 (1)

Text

NRC FC9NI 356 U. S. NUCLEAR REGULATORY COMMISSICN (7 77)

LICENSEE EVENT REPORT coNTRct stoce i l l l l 1 l@ (PLEASE PRINT OR TYPE ALL REoVIRED INFORMATION1 1 6 lo i t3 l9 lN lYUCENSE!

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[0i3i i Rod was selected. The instrument was rec,uired to be operable by TS Table 3.2-3 1 The redundant Rod Block monitor was verified operable as required. No significant l l0;4; }

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CAUSE DESORAPTION AND CORRECTIVE ACTICNS h it t a l l TheRod Block Monitor did net null becauce a fallad relav (ana t, *-n d of nat.u.:p i I I

1 ii 1 l life) did not allow the monitor to recocnize that a control rod was selected.

,1 2; I Replacement of relay board and ,ax ability testina restored the instrument to I 4 1,63 I service-on the followino day, No additional action is recuired. I I

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