ML17252B552

LER 80-017/03L-0 for Dresden, Unit 2 Re Double Valve Indication Was Observed on the HPCI Inboard Isolation Valve. Upon Trying to Cycle the Valve, the Valve Failed to Close

ML17252B552
Person / Time
Site:	Dresden
Issue date:	06/05/1980
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 80-476 LER 80-017/03L-0
Download: ML17252B552 (2)

Text

e Commonwec9 Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 June 5, 1980 BBS Ltr. /180-476 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region. III U.S. Nuclear Regulatory Commission*

799 Roosevelt Road Glen Ellyn, IL 60137

• Reportable Occurrence Report /180-17/031-0, Docket /1050-237, is being submitted to your office in accordance with Dresden Nuclear Power Station Technical Specific*ation 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

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B. B. Stephenson~

Station Superintendent Dresden Nuclear Power Station BBS/nh Enclosure cc/ Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC

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}o I 2 I I *Following a uni"t scram, double* valve indication was observed on the HPCI-inboard j 0 13 I: isolation valve *. Upon trying to cycle. the valve, the valve failed to close (T.S.3.7.D.l). The health and safety of the public was not endangered because the l0 14 I

) 0 I sJ I HPCI steam line was isolable _ via the outboard isolation valve and other ECCS systems

- 0 Is I* were operable. 'J'his - is the first occurrence of* this type.

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