ML20008D682

LER 79-053/01T-0:on 791207,jumper,installed to Restore Manual Operation to Recirculation Sys Sample Isolation Valve That Failed to Open,Was Found to Inhibit Automatic Isolation.Caused by Technical Personnel Error

ML20008D682
Person / Time
Site:	Peach Bottom
Issue date:	12/21/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20008D681	List: ML20008D680 ML20008D682
References
LER-79-053-01T, LER-79-53-1T, NUDOCS 8001140408
Download: ML20008D682 (1)

Text

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TQT) [ During operation on 5/20/79 the recirculation system sample isolation i 1mI valve A0-2-2-40, failed to open. A jumper was installed to restore I o !d i I man al operation. On 12/7/79 f t was recostnized that the _1umper inhibited I L 6] L automatic isolation. Sa fe ty sinnificance is small because the redundnnt I

'a l o 1 ! inner valve was operable. l

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'~ P. l Technical personnel error. Failed to identify all actions caused by l i

[1 El I installation of iumper. Importance of properly identifying j m m action 1

p]I was stressed. Jumper was removed. Both inner and outer valves up a I

'~7iil successfully tested for operation. Review of jumper log ontries on RPS. l

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