ML19256E505

LER 79-022/03L-0:on 791005,vacuum Breaker AO 2-1601-32B Failed to Give Full Open Red Light Indication.Caused by Valve Position Indicating Switch Problem.Corrective Actions to Be Completed During Nov 1979 Refueling Outage

ML19256E505
Person / Time
Site:	Quad Cities
Issue date:	10/25/1979
From:	Kan S COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19256E504	List: ML19256E503 ML19256E505
References
LER-79-022-03L-03, LER-79-22-3L-3, NUDOCS 7911070545
Download: ML19256E505 (1)

Text

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7 8 DOCKET NUMBER 68  % (VFNT OATH 74 75 REDORT J ArE EVENT DESCRIPTION AND PROBABLE CONSEQUENCE: hiv o  : l While conductino the suppression chamber to drywell vacuum breaker monthly exercise, a 3  ; procedure QOS 1600-1, vacuum breaker A0 2-1601-328 failed to give a full open red l oi, l light indication. Valve closure was successfully demonstrated. A differential l 0is pressure decay rate test was '.atisfactorily performed in accordance with lechnical l o is l Specification 3.7. A.4.d. All other vacuum breakers operated properly when exercised j 017 l l WI l '

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25 37 40 43 44 47 CAUsE DESCRIPTloN AND CORRECTIVE ACTICNS h i o y cause of this occurrence is attributed to a valve posi-tion indicating switch I i i  ! problem . Corrective action being taken is to perform the differential pressure decay I g l rate test as required. During the November 1979 mfuelina outage, a detailed g ] examination and repair will be made prior to unit startup and oDeration. l i A I l 7 1 3 90 STA  % POWE R OTHER STATUS D15 O R DISCOVERY CESCRIPTION i s J @ l0l5l6l@l NA l lBl@l Routine Test l ACTIVITY CONTENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA 7

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