ML19257C667

LER 80-001/01T-0:on 800103,w/Unit 2 at Power & Drywell Being Deinerted in Preparation for Planned Outage,Drywell Ventilation Isolation Valves AO-2521A & AO-2521B Discovered Fully Open.Caused by Lack of Procedural Control

ML19257C667
Person / Time
Site:	Peach Bottom
Issue date:	01/17/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257C663	List: 05000277/LER-1980-001, Forwards LER 80-001/01T-0 05000277/LER-1980-001-01, /01T-0:on 800103,w/Unit 2 at Power & Drywell Being Deinerted in Preparation for Planned Outage,Drywell Ventilation Isolation Valves AO-2521A & AO-2521B Discovered Fully Open.Caused by Lack of Procedural Control
References
LER-80-001-01T, LER-80-1-1T, NUDOCS 8001290573
Download: ML19257C667 (1)

Text

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>i>t I With Unit 2 at cower and the drywell being deinerted in preparation for l 3ia l a planned outage, two drywell ventilation isolation valves (AO-25211 & 1

):a 1 A0-25213) were disecvered to be fully open. During reactor operation I

~> >2 l these valves are 14-4ted to a nazirm opend.ng of 370 to insure valve I o 16 I closure within the na cirm allowable five seconds. This cccurrence is l

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I valves are ~Mntained at less than 370 during reactor crei2tien. When I

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