ML19340E150

Forwards IE Bulletin 80-23, Failures of Solenoid Valves Mfg by Valcor Engineering Corp. Written Response Required

ML19340E150
Person / Time
Site:	Bailly
Issue date:	11/14/1980
From:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Shorb E NORTHERN INDIANA PUBLIC SERVICE CO.
References
GL-80-97, NUDOCS 8101060525
Download: ML19340E150 (2)

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UNITED STATES

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7, NUCLEAR REGULATORY COMMISSION I

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799 ROOSEVELT ROAD g'

oLEN ELLYN. ILLINOls 6o137 November 14, 1980

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Those on Attached Address Listing:

Enclosed is IE Bulletin No. 80-23 which requires action by you with regard to your nuclear power facility.

In order to assist the NRC in evaluating the value/ impact of each bulletin on licensees, it would be helpful if you would provide us an estimate of the manpower expended in conduct of the review and preparation of the report (s) required by the bulletin.

Please estimate separately the manpower associated with corrective actions necessary following identification of problems through the bulletin.

Should you have any questions regarding this bulletin or the actions re- -

quired by you, please contact this office.

l Sincerely, l

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[amesG.Kep eh Director

Enclosure:

IE Bulletin No. 80-23 cc w/ encl:

Mr. D. W. Kane, Sargent & Lundy Mr. Gary N. Wright, Chief Division of Nuclear Safety Reproduction Unit NRC 20b h

RIII's CORPORATE ADDRESSES FOR OPERATING LICENSEES AND CONSTRUCTION PERMIT HOLDERS (BWR's and PWR's)

Docket No. 50-331 Iowa Electric Light and Power Company 3j ATTN:

Mr. Duane Arnold

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President IE Towers 2

. jj la P. D. Box 351 Cedar Rapids, IA 52406

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D. Mineck, Chief m

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Engineer Central Files Director, NRR/DPM Director, NRR/ DOR AE0D Resident Inspector, RIII PDR Local PDR NSIC TIC Docket No. 50-367 Northern Indiana Public Service Company ATTN: Mr. Eugene M. Shorb Senior Vice President 5265 Hohman Avenue Hammond, IN 46325 ce nel:

ral Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Mr. Dean Hansell, Office of Assistant Attorney General

SSINS No.:

6820 Accession No.-

8008220257 IEB 80-23 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.

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November 14, 1980 IE. Bulletin No. 80-23:

FAILURES OF S0LEN0ID VALVES MANUFACTURED BY VALCOR ENGINEERING CORPORATION

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Introduction:==

Valcor Engineering Corporation (Valcor) has submitted 10 CFR Part 21 Reports addressing failures of Valcor solenoid valves used at nuclear power facilities.

These failures have occurred at nuclear facilities owned by Duke Power Company and Omaha Public Power District, and are purportedly limited to solenoid valves having part numbers (P/N's) V70900-21-1 and V70900-21-3.

The information presented in this bulletin is intended to shed light on the defective solenoid valves so that appropriate actions can be taken to circum-vent the degradation of any safety-related system using such solenoid valves.

DISCUSSION:

The specific Valcor solenoid valves addressed herein were purportedly designed as Class IE components.

However, in light of the reported failures, it appears that neither the design nor the qualification tests were adequate for Class IE service.

Valcor has attributed the failures to a latent defect in the magnet wire.

Valcor believes that this defect manifests itself when the solenoid valves are continuously energized at elevated temperatures by an incompata-bility between the magnet wire's polyvinyl varnish coating and the wire's polyimide insulation which causes a dielectric breakdown leading to turn-to-turn shorts within the coil.

Valcor states that the above incompatability is limited to solenoid valves having P/N's V70900-21-1 and V70900-21-3, and that all customers affected by I

the aforementioned defect have been notified.

A listing of Valcor customers so notified and valves purchased follows.

CUSTOMER P.O. NO.

VALVE P/N QTY Anchor-Darling P-827 V70900-21-1,-3 24 Anchor-Darling N663 V70900-21-1 6

l Cesare Bonetti (Italy) 1535/79 V70900-21-3 10 Duke Power Company E95188-11 V70900-21-3 100 Duke (Mill Power)

C-97733 V70900-21-1,-3 335 Duke Power Company E97822-11 V70900-21-3 70 Ralph Hiller HA-18 Mill Power E5246; Omaha Public Power Dist.

43472 DUPLICATE DOCUMENT Stone and Webster L000 i Copes Vulcan 911,5!

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