ML19273B946

LER 79-035/03L-0 on 790514:during Mode 3,emergency Feedwater Flow Control Valve Failed to Open or Respond to Demand Signal.Similar to LERs 50-368/78-028 & 50-368/78-009. Caused by Pressure Switch Malfunction.Switch Repaired

ML19273B946
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/12/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19273B940	List: ML19273B939 ML19273B946 ML19273B952 ML19273B960
References
LER-79-035-03L, NUDOCS 7906180568
Download: ML19273B946 (1)

Text

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NR FORM 3c4 (7 778 U. S. NUCLE AR REGULATORY COMMISSION LICENSEE EVENT REPORT EXHtBIT A 00sTRol stoco l l } \ l 1 l@e 6

(PLEASE PRINT OR TYPE ALL REOutRED iNFORMATIONI It ;i

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EVENT DATE 14 75 HF80HT OA TE 80 EVE'aT DESCRIPTION AND PROS AOLE CONSEQUENCES h'd s o ,21 IDurinc ?fode 3 operation. Emercenev Feedwater flow control valve. I

<0 .at 12CV-1025-1 failed open and would not respond to the demand I The open position is the reauired position for EFAS: therefore.

,c,A.  ! signal.

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i e i ;the flowpath to the A Steam Generator would be unaffected in I

.c,c ;an emergency situation. This occurrence is similar to i

2 3 g50-36S/78-028 and 78-009. Reportable per T.S.6.9.1.9 (b) .

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serves as a limit switch for 2CV-1025-1 malfunctioned.

,, , phe switch was repaired and the valve was retu e2 1 1 ,, ;to the operable status approximately four hours after

, ,, ;the failure, meeting the requirement of Action Statement T.S.3.7.1.2 ,

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