Information Notice 1986-66, Potential for Failure of Replacement AC Coils Supplied by the Westinghouse Electric Corporation for Use in Class Ie Motor Starters and Contactors

Potential for Failure of Replacement AC Coils Supplied by the Westinghouse Electric Corporation for Use in Class Ie Motor Starters and Contactors

ML031250147
Person / Time
Site:	Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, 05000000, Zimmer, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant, Skagit, Marble Hill
Issue date:	08/15/1986
Revision:	0
From:	Jordan E L NRC/IE
To:
References
IN-86-066, NUDOCS 8608120034
Download: ML031250147 (5)

SSINS No.: 6835IN 86-66UNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF INSPECTION AND ENFORCEMENTWASHINGTON, D.C. 20555August 15, 1986IE INFORMATION NOTICE NO. 86-66: POTENTIAL FOR FAILURE OF REPLACEMENT ACCOILS SUPPLIED BY THE WESTINGHOUSE ELECTRICCORPORATION FOR USE IN CLASS 1E MOTORSTARTERS AND

CONTACT

ORS

Addressees

All nuclear power reactor facilities holding an operating license or aconstruction permit.

Purpose

This notice is to alert licensees that certain Westinghouse Electric Corporationac coils have shown a higher failure rate than previously experienced. Thesecoils are similar to Class 1E coils manufactured and supplied by Westinghouseas replacement parts for use in Class lE motor starters and contactors.It is expected that the licensees will review this information for applicabilityto their facilities and consider actions, if appropriate, to preclude the useof the defective coils. However, suggestions contained in this informationnotice do not constitute NRC requirements; therefore, no specific action orwritten notice is required.

Description of Circumstances

On June 19, 1986 Westinghouse Water Reactor Division (WRD) submitted a 10 CFRPart 21 report to the NRC indicating a higher-than-normal failure rate for accoils. The report stated that most of the failures had been encountered duringthe initial hours of energization. These coils were manufactured at the Westing-house Control Division (WCD) facility in Coamo, Puerto Rico, between June 1, 1984and December 31, 1985 and are provided as replacement parts for use in motorstarters and contactors.Discussion:During early June 1986, Westinghouse concluded that the Class 1E coils used incertain motor starters and contactors in nuclear plants could be subject tofailure. This conclusion was based on information from various non-nuclearcustomers about failures of similar coils. However, it should be noted thatup to this time no nuclear power plant Class lE coil failures had been reportedto WRD.8608120034I

-:IN 86-66August 15, 1986 Discussions between Westinghouse divisions have determined that the non-Class 1Ecoils manufactured between June 1, 1984 and December 31, 1985 experienced a signi-ficant increase in failure rate compared to prior history. These reported coilfailures occurred primarily less than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to several hours after the coilshad been continuously energized. To correct the problem, WCD made a number ofmanufacturing changes that included revised materials and processes. Westinghousetests performed on newly manufactured coils have indicated that the modifiedcoils are not subject to the same failures as those coils manufactured duringJune 1, 1984 through December 31, 1985. Westinghouse states, "Any coilmanufactured since the beginning of 1986 is free of the potential for suchfailures."WRD has determined that any coil which has been successfully energized contin-uously (not cumulative) for 5 days or more is expected to perform satisfactorilyand need not be replaced. Attached is a list of the plants with potentiallydefective coils that have been notified by WRD, followed by the WRD list ofdate codes of potentially defective coils.For facilities not on the list and using or stocking any WCD coils with one ofthe listed date codes, it is suggested that the Westinghouse Water ReactorDivision be contacted for information on the need for corrective action.No specific action or written response is required by this information notice.If you have any questions about this matter, please contact the RegionalAdministrator of the appropriate NRC regional office or this office.Ed& DtorDivisi of Emergency Preparednessand gineering ResponseOffice of Inspection and Enforcement

Technical Contact:

L. B. Parker, IE(301) 492-7190

Attachments:

1. List of Facilities and Date Codes2. List of Recently Issued IE Information Notices Attachment 1IN 86-66August 15, 1986 FACILITIES NOTIFIED BY WESTINGHOUSE1.2.3.4.5.6.7.Maine YankeeOconeePrairie IslandSan OnofreThree Mile IslandTurkey PointVermont YankeeDATE CODES OF POTENTIALLY DEFECTIVE COILSWEEK OFMANUFACTURE NUMBERS1984 DATE CODES1985 DATE CODESApprox 3-31Approx 6-1Approx 7-1010203040506070809101112131415161718192021222324252627282930313233CRSECCRWECCRIECCRTECCRCECCRHECCRGECCREECCRAECCSRECCSSECCSWECCSIECCSTECCSCECCSHECCSGECCSEECCSAECCWRECCWSECCWWECCWIECCWTECCWCECCWHECCWGECCWEECCWAECCIRECCISECCIWECCIIECCWSETCWWETCWIETCWTETCWCETCWHETCWGETCWEETCWAETCIRETCISETCIWETCIIET AttachmentIN 86-66August 15, IJrWEEK OFMANUFACTURE NUMBERS1984 DATE CODESApprox 9-30Approx 12-3134353637383940414243444546474849s05152CITETCICETCIHETCIGETCIEETCIAETCTRETCTSETCTWETCTIETCTTETCTCETCTHETCTGETCTEETCTAETCCRETCCSETCCWET1985 DATE CODESCITECCICECCIHECCIGECCIEECCIAECCTRECCTSECC,.WECCTIE:CCTTECCTCECCTHECCTGECCTEECCTAECCCRECCCSECCCWECNOTE: Any coil with one of these date codes should be treated as potentiallydefective and appropriate action take Attachment 2IN 86-66August 15, 1986LIST OF RECENTLY ISSUEDIE INFORMATION NOTICESInformation Date ofNotice No. Subject Issue Issued to86-6586-6486-6386-6286-61Malfunctions Of ITT Barton 8/14/86Model 580 Series SwitchesDuring Requalification TestingDeficiencies In Upgrade 8/14/86Programs For Plant EmergencyOperating ProceduresLoss Of Safety Injection 8/6/86CapabilityPotential Problems In West- 7/31/86inghouse Molded Case CircuitBreakers Equipped With AShunt TripFailure Of Auxiliary Feed- 7/28/86water Manual Isolated ValveUnanalyzed Post-LOCA Release 7/28/86PathsUnauthorized Transfer And 7/14/86Loss Of Control Of IndustrialNuclear GaugesIncreased Monitoring Of 7/14/86Certain Patients WithImplanted Coratomic, Inc.Model C-100 and C-101Nuclear-Powered CardiacPacemakersDropped Fuel Assembly 7/11/86All power reactorfacilities holdingan OL or CPAll power reactorfacilities holdingan OL or CPAll PWR facilitiesholding an OL or CPAll power reactorfacilities holdingan OL or CPAll power reactorfacilities holdinga CPAll power reactorfacilities holdingan OL or CPAll NRC generallicensees that possessand use industrialnuclear gaugesAll NRC licenseesauthorized to usenuclear-poweredcardiac pacemakersAll power reactorfacilities holdingan OL or CP86-6086-31Sup. 186-5986-58OL = Operating LicenseCP = Construction Permit