ML19340E143

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

ML19340E143
Person / Time
Site:	La Crosse File:Dairyland Power Cooperative icon.png
Issue date:	11/14/1980
From:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Linder F DAIRYLAND POWER COOPERATIVE
References
NUDOCS 8101060495
Download: ML19340E143 (2)

Text

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no noosEVELT ROAD oLEN ELLYN. lLLINois 60137 November 14, 1980 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.

Sincerely, G Kp 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 8103 06n$5

RIII's CORPORATE ADDRESSES FOR OPERATING LICENSEES AND CONSTRUCTION PERMIT 110LDERS (Bk'R's and Pk'R's)

Docket No. 50-329 Docket No. 50-330

n Consumers Power Company bf UI ATTN: Mr. James W. Cook il Lp?

Vice President

"'4 Midland Project

U Nel 1945 West Parnall Road US Jackson, MI 49201 22 29 Y

tn cc w/ encl:

a Central Files fj Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Ronald Callen, Michigan Public Service Commission Myron M. Cherry, Chicago Docket No. 50-409 Dairyland Power Cooperative ATTN:

Mr. F. W. Linder General Manager

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2615 East Avenue - South La Crosse, WI 54601 cc w/en :

Mr. R

Shimshak,

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P t Superintendent ral Files Director, NRR/DPM Director, NRR/ DOR AEOD Resident Inspector, RIII PDR Local PDR NSIC TIC Mr. John Duffy, Chief Boiler Inspector 4

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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 SOLEN 0ID VALVES MANUFACTURED BY VALCOR ENGINEERING CORPORATION

==

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 the aforementioned defect have been notified.

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

i CUSTOMER P.O. NO.

VALVE P/N QTY Anchor-Darling P-327 V70900-21-1,-3 24 Anchor-Darling N663 V70900-21-1 6

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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