ML20087F487

Interim Deficiency Rept Re Failure of Turbocharger on Emergency Standby Diesel Generator.Temporary Bypass Valve Around Turbocharger Prelube Drip Line Orifice Installed. W/Certificate of Svc.Related Correspondence

ML20087F487
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	03/09/1984
From:	Mccaffrey B LONG ISLAND LIGHTING CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
SNRC-1018, NUDOCS 8403190127
Download: ML20087F487 (4)

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REU TZD CUiEEbFCN vs gg mm LONG ISLAND LIGHTINECOMPANY SHOREHAM NUCLEAR POWER STATION p.o. SOX 618. NORTH COUNTRY R

• O .Y.11792 March 9, 1984 U F(i i.i il ..

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SNRC-1018 Dr. Thomas E. Murley Regional Adminiatrator Office of Inspection & Enforcement - Region 1 U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 194J6 Long Island Lighting Company Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Dr. Murley:

On February 4, in accordance with 10CFR50.55 (e) , we reported verbally to Region 1 a potential deficiency concerning the failure of the turbocharger on one of Shoreham's Emergency Standby Diesel Generators. This letter serves as our 30-day follow-up written report regarding that potential deficiency.

Description of the Deficiency On February 1, the turbocharger on Diesel Generator 101 (lR43*ENG101) failed in service causing a premature shutdown of Diesel Generator 101. On February 4, the turbocharger was disas-sembled for purposes of conducting a preliminary failure inves-tigation.

that Based upon the results of that inspection, it appeared the turbocharger failure res',ited from inadequate lubrication of the turbine end thrust bearing.

Inadequate turbocharger thrust bearing lubrication was the subject of a previous reportable condition under 10CFR21 (ref: TDI memo Mathews to NRC 12/16/80), which was corrected on applicable nuclear engines, including Shoreham.

As the Diesel Generator 101 turbocharger inspection results indicated, the design modification provided by Transamerica Delaval, Inc. (TDI), to correct this problem may not have been completely effective.

On February 5, the turbocharger on Diesel Generator 103 y

i=4 (lR43*ENG103) also exhibited indications of incipient failure which resulted in termination of the Diesel Generator 103 test run.

Subsequent inspection of the turbocharger evidenced a failure mechanism similar to that of the Diesel Generator 101 turbocharger.

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Mtarch 9, 1984 SNRC-1018 Page 2 Desigr. Review / Quality Revalidation inspections conducted on the Diesel Generator 102 (1R43*ENG 102) turbocharger have shown excessive thrust bearing wear, which appears consistent with the Diesel Generator 101 and 103 turbocharger failures.

As this eNdence strongly suggests the existence of a generic deficiency, we requested TDI to address reportability under 10CFR21. TDI has concluded that a reportable deficiency under 10CFR21 exists and has notified the NRC and all potentially affected owners (ref. memo Mathews to NRC, 2/15/84).

, Corrective Action and Action to Prevcnt Recurrence In order to confirm the findings of the preliminary failure inves-tigation, the turbine end thrust bearings from Diesel Generators 101, 102 and 103 were sent to Failure Analysis Associates (FaAA) for inspection. A failure analysis by FaAA has determined that the damage to the bearings can be attributed to high wear while sta-ting, when the turbocharger is accelerated with limited l<;ricant present.

Based upon recommendations made by TDI and Elliott (the turbocharger manufacturer) , LILCO has installed a temporary by-pass valve around the turbocharger prelube drip line orifice. By opening the by-pass valve prior to engine start and allowing it to remain open until the engine is running and normal oil pressure is achieved, the turbocharger will receive adequate lubrication such that failures of the type experienced will be precluded. TDI has indicated that the3- recommended permanent corrective action will be providad to all .ffected owners by March. 30, 1984. Upon receipt of this information, we will initiate the appropriate permanent modifications on all' engines. The interim steps outlined above, however, will ensure that the diesel generators are available to perform their safety function until the permanent modifications are made. The schedule fsr completion of.all corrective actions will be developed consistent with material delivery commitments and engine testing schedule requirements.

If you have any questions relative to this matter, please do not hesitate to contact this office.

Very truly youn ,

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B. R. McCaf e -

Manager, Nuclear Compliance & Safety Shoreham Nuclear Pcwer Station WMJ/cf S4 cc: Mr. Richard DeYoung, Director NRC Office of Inspection & Enforcement Division of Reactor Operating Inspection Washington, DC 20555 Mr. R. Caruso, NRC NRR Mr.,C. Petrone, Site NRC

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ATDOM!NT I Diesel Generators CCfMETET

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Lawrence J. Brenner, Esq.

• Ralph Shapiro, Esq.

Ahninistrative Judge C mu.u=

Atmfc Safety and Licensing Board mi'T"9\10 :59 9 East Ot/IStreet U.S. Nuclear Regulatory Ommission New York, NY 10016

, Washington, D.C. 20555 kFFia Howard O fp,0F $M:,;" & g ,.

Dr. George A. Ferguson

• 217 Newbr 'd Abninistrative Judge Hicksville, NY 11801 Atanic Safqty and Licensing Board Sdiool of Engineering "

W. Taylor Reveley, III, Esq. **

Howard University Hunton & Williams 2300 6th Street, N.W. P. O. Box 1535 washington, D.C. 20059 707 East Main Street Riclinond, VA 23212 Dr. Peter A. N rris

• hininistrative Judge Mr. Jay Dunkleberger Atanic Safety and Licensing Board New York State Energy Office U.S. Nuclear Regulatory Ccmnission Agancy Building 2 Washington, D.C. 20555 Jhpire State Plaza Albany, NY 12223 Erlward M. Barrett, Esq.

General Counsel James B. Dougherty Icng Island Lighting ocmpany 3045 Porter Street, N.W.

250 Old Country Road Washington, D.C. 20008 Mineola, NY 11501 Stephen B. Latham, Esq.

Mr. Brian McCaffrey 'IWaney, Iatham & Shea Iong Island Lighting Cmpany P.O. Box 398 P. O. Box 618 33 West Second Street North Country Pcad Riverhead, NY 11901 Wading River, NY 11792 Marc W. Goldsmith Jeff Smith Energy Research Group, Inc.

Shoreham Nuclear Power Station 400-1 Totten Pond Road P.O. Box 618 Waltham, Massachusetts 02154 North Country Road Wading River, NY 11792 - MHB 'Ibchnical Associates 1723 Hamilton Avenue Joel Blau, Esq. Suite K New York Public Service Ccmnission San Jose, CA 95125

'Ihe Governor Nelson A. Rockefeller Building Dipire State Plaza Hon. Peter F. Cohalan Albany, NY 12223 Suffolk County Executive H. Iee Dennison Building Martin Bradley Ashare, Esq. Veterans Mernorial Highway Suffolk County Attorney Hauppauge, New York 11788 H. Iee Dennison Building l i

Veterans Menorial Higlway Ezra I. Bialik, Esq. l Hauppauge, New York 11788 Assistant Attorney General  !

Environnental Protection Bureau  !

Atanic Safety and Licensing Board Panel New York State Department of Iaw U.S. Nuclear Regulatory Ccmnission 2 World Trade Center )

l Washington, D.C. 20555 New York, NY 10047 '

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D.G. Att. 1 Page 2 Docketing and Service Section Atcnnic Safety and Licensing Appeal Office of the Secretary Board U. S. Nuclear Regulatory Ca mission U.S. Nuclear Regulatory Ccenission 1717 H Street, N.W. Washington, D.C. 20555 Washington, D.C. 20555 Jonathan D. Feinberg, Esq. #

Richard J. Coddard, Esq.

• Staff Counsel Ralph Caruso New York State Public Service U. S. Nuclear Regulatory Cm mission Cm mission Washington,.D.C. 20555 ,

.5 lbckefeller Plaza Albany, NY 12223 Stuart Diamond Stewart M. Glass, Esq.

Envirornent/ Energy Writer NEWSDAY Regional Counsel Federal Bnergency Managment Agency Img Island, NY 11747 26 Federal Plaza Gerald C. Crotty, Esq.

New York, NY 10278 Ccunsel to the Governor Ibbert E. Snith, Esq.

Executive Chaber State Capitol Guggenheimer & Untermyer Albany, NY 12224 80 Pine Street New York, NY 10005 Fabian Palcmino, Esq. #

Special Counsel to the Governor Executive Chanber Roca 229 State Capitol Albany, NY 12224 1

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