ML19254D079

Submits Final Part 21 Rept Re Potential Defect in NEMA Size 3 Starters & Contractors.Gould,Inc Advisory Notice of Potential Product Defect Encl

ML19254D079
Person / Time
Site:	Midland
Issue date:	10/15/1979
From:	Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
References
HOWE-270-79, NUDOCS 7910220337
Download: ML19254D079 (3)

Text

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i Power g' Stephen H. Howell Senior Vice President Gener: t Offices: 1945 West Parnall Road, Jackson, Michigan 49201 * (517) 788-0453 Octcber 15, 1979 Hove-270-79 Mr J G Keppler, Regional Director Office of Inspection and Enforcement US Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLA'ID NUCLEAR PLANT UNIT No 1, DOCKET 30 50-329 UNIT NO 2, DOCKET No 50-330 NDIA - SIZE 3 STARTS, GCULD INC. PART 21 In accordance with the requirements of 10 CFR 50 55(e), this letter consti-tutes the final repert on the status of equipment supplied to Midlana for which Gould Inc made a 10 CFR Part 21 repert. Se attachment provides a description of the product defect and the supplier's reco== ended corrective action.

An investigation at the Midland site revealed that none of the subject starters had been installed in Class lE systems. There are six spare starters which fall within the dates for which faulty units were manufactured and/or distributed.

Two of these were dedicated for non-Q systems whereas the other four vere not dedicated and cculd have been used in Q applications. An NCR has been written to cover these units,and they have had hold tags applied to prevent their usage.

These units vill be either modified by the manufacturer's retrofit kits or vill be returned to the manufacturer for replacement.

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Attachment:

Letter, N G L ng (Gould Inc) to R 'l arguglio (CPCo), " Advisory Notice of Potential Product Oefect Pursuant to 10 CFR 21, Sect 1)n 21.21 " dated September 17, 1979 CC: Director of Office of Inspection & Enforcement Att: Mr Victor Stello, CSURC (15)

" Director, Office of Management g Information and Program Control, USNRC (1) O a~.

7910220 75 7

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CoutJ Inc. Electrical Products Group 2002 Bettict fid.. Finkhrq. Mo 21048 Telephone (301) 876-2214

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" Attachment to Hove-270-79 September 17, 1979 9

Consumers Power Co.

1955 W. Pernall Rd.

Jackson, Och. 49201 Attn: Mr. B. W. Marguglio, Dir. of QA .

S,UBJECT: Advisory Notice of Potential Product Defect Pursuant to 10 CFR 21, Ser. tion 21.21 ,

Notice has been transmitted to the NRC of a potential defcet in NEMA Size 3 Starters and Contactors supplied and manufactured by Gould inc., Distribution & Controls Division.

According to our records, shipments of these components may have been made to the following facility per your purchase crder and on the date(s) indicated.

Midland - PO 7220-E-7-AC Various Shipments in 1978 & 1979 The following are excerpts from the NRC report which are appropriate to the correction of the potential hazard.

1. Nature of the potential product hazard:

Seizure or Binding of the carrier assembly, P/N 401179 within the support plate P/N 401178 of the stationary contact assembly. 1.392" Dimension is u dersize to 1.376".

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2. Nature of potential component failure or nonconfermance ar,sociated with the potential cr actual product hazard or defect:

Failure of the contactor to operate could cause serious safety hazard by either f'ailure to tart motor or to turn off rnotor resulting in further complications in the particular system.

3. Specific dates when faulty units were manufactured and/or distributed.

June 1,1978 to 20 August 1979.

4. Model numbers and serial numbers of product or component.

NEMA Size 3 of following classes with date code 7822 to 7935.

A20, A21, A22 Starters, (Pages 39-43 of Gould's Controlfax Catalog)

A10, All, A12, A13, A14 Contactors, (Pages 15-18 of Controlfax Catalog)

P10 DC Contactor, (Page 18A cf Centrolfax Catalog).

)k0E Manufacturer of f-T-E Ewnrnert

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. Advisory Nctica of Potential Product Defect Pursuant to 10 CFR 21, Section 21.21

5. Location on prcduct where model number and serial number appear.

Date Code is on Base Assembly adjacent to the overload relay. The NEMA type, Class, and Model number is on the cover label, plainly visible.

6. What corrective action has been, is be'ng or will be taken by the manufacturer, the name of the individual or organization responsible for the action and how long it has or will take.

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1. Nest upport plates P/N 401178 are being manufactured with a corre<:ted , ,

die which corrects the de+ect.

2. Parts with possible defects are being reworked by machining to remove excess material which could cause the problem. Inside dimension of support legs should be 1.392 to 1.400 inches, in new parts or after macnining old parts.

Work :s undenvay to correct all in-house parts and prepare retrofit kits for field installation. Kits will be available on or about 21 Sept. 1979. Mr. Diamond Re: e, Engineering Mgr., Control Components Operation, Westminster, Md., is responsible ror corrective action and preparation of retrofit kits.

7. What tests are conducted in factories to avoid the defect and/or to comply with an applicable product specification:

Inspection of parts to assure dimensional integrity then electrical operation tee after retrofit.

Retrofit kits and installation details will be distributed by Gould through product application engineers or factory representatives upon determination of specific customer needs.

We regret the inconv oience caused by this problem and will do all possible to correct the problem as quickly as possible. If there is further information required, please contact the Gould Regional Sales Office, cr call Mr. Jurgen H. Zerbock, Manager, Application Engineering (301) 876-2214.

A William G. Long Operation Manager cc: R.P. Wathen.

J.H. Zerback J. Erhardt D. Rose Regional Sales Offices

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(J Fahlen 5105)

Bechtel, Mr. R. L. Castleberry, Project Engineer

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