05000293/LER-1979-042-03, /03L-0:on 791101,oxygen Analyzer Valves A0-5065- 10,12,15,16,17,23 & 26 Did Not Meet Primary Containment Isolation Timing Requirements.Caused by Faulty Position Indication Lights on A0-5045-12 & 15

/03L-0:on 791101,oxygen Analyzer Valves A0-5065- 10,12,15,16,17,23 & 26 Did Not Meet Primary Containment Isolation Timing Requirements.Caused by Faulty Position Indication Lights on A0-5045-12 & 15

ML19260B192
Person / Time
Site:	Pilgrim
Issue date:	11/30/1979
From:	Mathis C BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19260B188	List: 05000293/LER-1979-042, Forwards LER 79-042/03L-0 05000293/LER-1979-042-03, /03L-0:on 791101,oxygen Analyzer Valves A0-5065- 10,12,15,16,17,23 & 26 Did Not Meet Primary Containment Isolation Timing Requirements.Caused by Faulty Position Indication Lights on A0-5045-12 & 15
References
LER-79-042-03L, LER-79-42-3L, NUDOCS 7912070393
Download: ML19260B192 (1)

LER-1979-042, /03L-0:on 791101,oxygen Analyzer Valves A0-5065- 10,12,15,16,17,23 & 26 Did Not Meet Primary Containment Isolation Timing Requirements.Caused by Faulty Position Indication Lights on A0-5045-12 & 15

Event date:
Report date:
2931979042R03 - NRC Website

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LICENSEE EVENT REPOhT

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8 60 61 DOCK ET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h o 2 l At 0635 hours0.00735 days <br />0.176 hours <br />0.00105 weeks <br />2.416175e-4 months <br /> on November 1, 1979, Oxygen Analyzer valves A0-5065-10,12,15,16,17,23 l o 3 l and 26 did not meet the timing requirements for Primary Containment Isolation. All l o

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[ valves were placed in the closed position and investigation commenced immediately, o s l This condition also caused the Primary Containment Atmospheric Monitor C-19 to

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O l The investigation revealed faulty positiqn indication lights on A0-5045-12. 15. and I a loose limit switch on A0-5045-26. These valves position problems were corrected I

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g and timing was correct. A0-5045-17 & 23 were checked with no problems found and

timed satisfactorily. A0-5045-10 & 16 were left in the isolated position f.,r future l g repairs and the 02 Analyzer & C-19 returned to service on Nov. 2, 1979.

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