05000315/LER-1979-016-03, /03L-0 on 790304:two Manual Containment Isolation Valves Were Inadvertantly Left Open Following Routine Sample of Instrument Room.Caused by Personnel Oversight.Both Valves Were Returned to Their Normally Closed Positions

/03L-0 on 790304:two Manual Containment Isolation Valves Were Inadvertantly Left Open Following Routine Sample of Instrument Room.Caused by Personnel Oversight.Both Valves Were Returned to Their Normally Closed Positions

ML17317B069
Person / Time
Site:	Cook
Issue date:	04/03/1979
From:	Beilman T INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B068	List: 05000315/LER-1979-016-03, /03L-0 on 790304:two Manual Containment Isolation Valves Were Inadvertantly Left Open Following Routine Sample of Instrument Room.Caused by Personnel Oversight.Both Valves Were Returned to Their Normally Closed Positions 05000315/LER-1979-017-03, /03L-0 on 790312:spent Fuel Pit Exhaust Ventilation Unit Flow Failed to Meet Acceptance Criteria. Caused by Slight Closing of Intake Grills Due to Sys Vibration.Grill Damper Linkage Securely Fastened ML17317B067
References
LER-79-016-03L, LER-79-16-3L, NUDOCS 7904090187
Download: ML17317B069 (2)

LER-1979-016, /03L-0 on 790304:two Manual Containment Isolation Valves Were Inadvertantly Left Open Following Routine Sample of Instrument Room.Caused by Personnel Oversight.Both Valves Were Returned to Their Normally Closed Positions

Event date:
Report date:
3151979016R03 - NRC Website

text

U. S. NUCI.EAR REGULATORY COMMISSION NRC FORM 366 LtCENSEE EVENT REPOR

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9 09 DOCKET NUMBER, 68 69 EVENT DATE 74 75 REPORT DATE

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80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES ~10 TWO MANUAL CONTAINMENT ISOLATION VALVES USED FOR INSTRUMENT ROOM SAMPLING WERE DISCOVERED TO BE IN THE OPEN POSITION.

UPON DISCOVERY, BOTH VALVES WERE RETURNED TO THEIR NORMALLY CLOSED POSITIONS IN ACCORDANCE WITH T.S. 3.6.3.1.

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7 Q26 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS ~27 THE VALVES WERE INADVERTANTLY LEFT OPEN FOLLOWING A ROUTINE SAMPLE OF THE INSTRUMENT ROOM.

TO PREVENT RECURRENCE, THE IMPORTANCE OF THE CONTAINMENT ISOLATION VALVES WAS DISCUSSED WITH THE AFFECTED PERSONNEL DURING A SECTION MEETING, 3

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