ML20079L491

Part 21 & Deficiency Rept 158 Re Potential Defect in Component of DSRV-16-4 Standby Diesel Generator Sys. Drawing Rev to Increase Gear Tooth Hardness Completed. Recommended Corrective Actions for Sites Listed

ML20079L491
Person / Time
Site:	Cooper
Issue date:	10/29/1991
From:	Guntrum B NEBRASKA PUBLIC POWER DISTRICT
To:	Office of Nuclear Reactor Regulation
References
REF-PT21-91 158, NUDOCS 9111060337
Download: ML20079L491 (6)

Text

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' Cocptr Infuitries .

. s .- '-+.-

. Coopsr Enstgy Ssrvices

..--- - 14490 Cata:ina Street .

._ Sao Leandro; CA S.577-551o

.415 614 7400-4 Fax 415 614 7409 .

COOPER October l29, 1991 Director of Nuclear Reactor Regulations Nuclear Regulatory Commission Mail Station P1-137 Washington, DC 20555 REPORT #158 k d

Dear Sir,

Pursuant to the requirements of Title 10, Chapter 1, Code of Federal Regulations, Part 21, Enterprise Engine Services, a Di'rision' of Cooper Industries, hereby__ notifies the L- -Commission of a potential defect -in a -component- of- a DSRV-16-4 Standby . Diesel Generator System. There existe a potential problem with the driven gear for the Engine-Driven

. Jacket _ Water Pump.

l.

These gears were supplied as original- equipment and as

rep 3acement. components to the following sites:

l:

i: UTILITY- BITE SERIAL # MODEL

ENTERGY _ Grand Gulf .

74033-36 DSRV_-16-4 CP&L Shenron Harris 74046-49 .DSRV-16-4 DUKE Catawba 75017-20 DSRV-16-4 CEI~ Perry 75051-54 DSRV-16-4

-- TV A . _Bellefonte 75080-83 DSRV-16-4

! -WPPS WPPS I 75084-85 DSRV-16-4 L -TU ELECTRIC Comanche Peak 76001-04 DdRV-16-4 GPC Vogtle 76021-24 DSRV-16-4 TVA- Hartsville 77024-35 DSRV-16-4 l-E -The gear supplied is man'ufactured by Cooper Industries, Enterprise' Engine Services in San Leandro, California. The individual. gear is identified as part number 02-425-03-AB, but is also part~of a gear carrier assembly part number 1A-6114.

'9111060337 911029

'PDR -ADOCK 05000298 . - )i P- PDR- Ig)

NRC Report #158 10/29/91 Page-2 This.is the current standard water pump driven gear used in

DSRV-4 engines. We have experienced five (5; water pump

- ' failures as a result of premature gear wear at non-nuclear installations. Additionally, one (1) gear has been not ed at a non nuclear site with an excessive wear condition.

These failures are characterized as a breaking down of the gear tooth surface. As the driven gear weers, the gear backlash increses which in turn increases the torsional

- excitation fot;es and--vibration in the pump. This increase L -in vibration has caused complete pump failure with a resulting high jacket water temperature condition and engine shutdown.

While!a~ complete pump failure has not occurred in a nuclear application, we have observed severe gear wear at Georgia Power's Plant Vogtle and Carolina Power's Shearon Harris Plant.

Our investigation into these reports reveals that gear wear

-induced pump f ailurcs nave occurred at approximately 1,.500

. operating-hours. Whili gears have a finite life, operating

-hours should exceed 25,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />.

Preventive action has been taken by a drawing - revision to--

increase _the gear tooth hardness. This revision (Revision C) also requires the stamping of the part number and revision level on the gear huh, Corrective action must be taken _ by the ' individual site on

-inetalled' gears or any gear or gear. carrier assemblies that are in stores. Recommended corrective action'is as follows:

-1) Perform a visual inspection of the installed gear for evidence of premature wear. Evidence of excessive pitting or spalling or a-network of ourface cracks are signs of impending gear failure. We.are unable to predict, with any accuracy, the remaining service life of such a gear.

1

2) If the gear is not stamped with a revision level .

I or if the revision level is stamped, but is prior to Revision'"C", the gear should be replaced at the next refueling outage.

i l COOPER l..

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l .

NRC Report #158 10/29/91 Page 3 requires the action of other parties, Cooper As this Industries cannot estimate when corrective action will be completed.

A copy of this letteras will be forwarded to the affected indicated by the carbon copy list.

sites in Paragraph 2, Our evaluation of this matte was completed on october 26, 1991.

Sincerely,

(} -

Bru'be'C. Guntrum Manager, Quality Assurance BCG:ej cc: (see attached) 1 CODPER

U.S. Nuclear Regulatory Commission Report Cc' Gulf States Utilities P.O. Box 220 St. Francisville, LA 70775 Attention: Director, Nuclear Licensing Carolina Power and Light Co liarris Nuclear Project P.O. Box 165 How 11111, NC 27562 Attention: Mr. C.S. liinnant Plant Gen Mgr Carolina Power and Light Co P.O. Box 1551 Raleigh, NC 27602 Attention: R.A. Watson Sr. Vice President Carolina Power and Light Co Harris Nuclear Project P.O. Box 165 New 11111, NC 27562 Attention: Mr. R.B. VanMetro Mgr Tech Support Carolina Power and Light Co Shearson liarris Nuclear Plant P.O. Box 155 New 11111, NC 27562 Attention: H.P. Beane Manager, QC Duke Power Company P.O. Box 1007 Charlotte, NC 28201-1007 Attention: W.T. Robertson V.P. Procurement Southern California Edison

! P.O. Box 128 San Clemente, CA 92674-0128 Attention: Mgr of Nuclear oversight Texas Utilities Electric Skyway Tower 400 North Olive Street, L.B. 81 Dallas, TX 75201 Attention: W.J. Cahill, Exec V.P.

p**

COOPER

~

U.S. Nuclear Regulatory Commission Report CC:

Cleveland Electric Illuminating Perry Nuclear Power Plant P.O. Box 97 Perry, OH 44081 Attention: A. Kaplan Cleveland Electric Illuminating Perry Nuclear Power Plant P.O. Box 97 Perry, OH 44081 Attention: Rtissell J. Tadych, Manager, QC Cleveland Electric Illuminating Perry Nuclear Power Plant P.O. Box 97 Perry OH 44081 Attention: Mr. S. Kensicki Director, Perry Tech Dept Tennessee Valley Authority 1101 Market Street, LP SN 1520 Chattanooga, "N 37402 Attention: Mr. T.W. Overlid Mgr. Nuclear Exper Review ,

Tennessee Valley Authority WT10 h*77 H-K 400 W. Summit Hill Drive Knoxvillbe TN 37902 Att@tlons Tir: Chan F6chington Public Power Supply F O. Enx 460 RichlAnd, WA 99332 Attention: Mr. L.C. Oakes Manager, WNP-1 Engineering Tennessse Valley Authority 400 W. Summit Hill Drive WI10 C126'H-K Knoxville, TN 37902-1499 Attention: R.C. Weir Sacramento Municipal Utility District 14440 Twin Cities Road Herald, CA 95638 Attenticn: Paul E. Turner Manager, Tech Support l n**

l COOPER

I U.S. Nucionr Regulatory Commission Report cc:

Georgia Power Company Plant Vogtle P.O. Box 1600 Waynesboro, GA 30830 Attention: Mr. W.B. Shipman General Manager System Energy Rcsourcos P.O. Ilox 756 Por t Gibnon, MS 39150 Attot. tion: C.R. Ilutchinson General Managor, SERI i

System Energy Resources P.O. Box 429 Port Gibson, MS 39150 Attention: Fred Titus, Directoc Nuclear Plant Engineering System Energy Resources P.O. Box 31995 6cholon One 1340-Echelon Parkway Jackson, MS 39286-1995

'tention: T . ll . Cloninger V.P. Nuclear Engincoring l

Long Island Lighting Company Shoreham Nuclear Power Station i North Country Road Wading River, NY 11791 l Attention: Mgr. Nuclear Operations Support Department j Duke Power Company-Nuclear Production Department P.O. Box 1007 Charlotte, NC 28201-1007 Attention: Manager, Nuclear Safety Y

COOPER