ML20083F646

Final Deficiency Rept Re Matl in Connecting Rod Bearings. Initially Reported on 831014.Failure Analysis Assoc Rept Analyzing Replacement Connecting Rod Bearings & Fatigue Life Prediction Encl

ML20083F646
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	12/16/1983
From:	James Smith LONG ISLAND LIGHTING CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20083F647	List: ML20083F646 ML20083F651
References
10CFR-050.55E, 10CFR-50.55E, SNRC-993, NUDOCS 8401030239
Download: ML20083F646 (3)

Text

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l g LONG ISLAND LIGHTING COM PANY masw SHOREHAM NUCLEAR POWER STATION P.O. BOX 618 NORTH COUNTRY RO AD e WADING RIVER. N.Y.11792 Dirut Dial Number December 16, 1983 SNRC-993 Dr. Thomas E. Murley Regional Administrator Office of Inspection & Enforcement - Region 1 U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 Long Island Lighting Company Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Mr. Murley:

On October 14, 1983, in accordance with 10CFR50.55 (e) , we reported verbally to Region I a potential deficiency concerning material in the Shoreham Diesel Generator connecting rod bearings. Subse-quently, an interim report was presented on November 3, 1983, with the understanding that a final report would be forwarded upon com-pletion. On November 25, 1983, we advised Region I that the final report, under preparation by Failure Analysis Associates (FaAA),

was expected to be issued by December 16, 1983. This letter serves to transmit the final report to the NRC.

As a result of an extensive analysis, it has been determined that the major contributor to the cracking of the original connecting rod bearing was an unsupported bearing end due to a " chamfer in the connecting rod bore. In that the component design associated with the larger replacement crankshaft has eliminated this unsup-ported end, as well as lowering the peak oil film pressure, there results a predicted bearing life of 38,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> at full load. We conclude that the replacement connecting rod bearings will be able to perform their intended function as discussed in detail in the attached FaAls report entitled, " Analysis of the Replacement Connecting Rod Bearings for Emergency Diesel Generators, Fatigue Life Prediction, Shoreham Nuclear Power Station".

8401030239 831216 PDR ADOCK 03000322 S PDR ( (

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December 16, 1983 SNRC-993 Page 2 If you have any questions relative to this matter, please do not hesitate to contact us.

Very truly yours,

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l J. L. Smith Manager, Special Projects Shoreham Nuclear Power Station WMJ/ law S4 Attachment 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 All Parties Listed in Attachment 1

ATTACHMENT 1 Lawrence Brenner, Esq. Herbert H. Brown, Esq.

Administrative Judge Lawrence Coe Lanpher, Esq.

Atomic Safety and Licensing Karla J. Letsche, Esq.

Board Panel Kirkpatrick, Lockhart, Hill U.S. Nuclear Regulatory Christopher & Phillips Commission 8th Floor Washington, D.C. 20555 1900 M. Street, N.W.

Washington, D.C. 20036 Dr. Peter A. Morris Administrative Judge Mr. Marc W. Goldsmith Atomic Safety and Licensing Energy Research Group Board Panel 4001 Totten Pond Road U.S. Nuclear Regulatory Waltham, Massachusetts 02154 Commission Washington, D.C. 20555 MHB Technical Associates 1723 Hamilton Avenue Dr. George A. Ferguson Suite K San Jose, California 95125 School of Engineering Howard University 2300 6th Street, N.W.

Washington, D.C. 20059 Stephen B. Latham, Erg.

Twomey, Latham & Shea 33 West Second Street Bernard M. Bordenick, Esq. -

P.O. Box 398 .

David A. Repka, Esq. Riverhead, New York 11901 U.S.. Nuclear Regulatory Commission -

Washington, D.C. 20555 Ralph Shapiro, Esq.

Cammer and Shapiro, P.C.

9 East 40th Street Mr. James Dougherty New York, New York 10016 ,

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3045 Porter Street Washington, D.C. 20008 Matthew J. Kelly, Esq.

State of New York Department of Public Service Three Empire State Plaza Albany, New York 12223 mrmum mmmm

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Failure Analysis Associates i ENGINEERING AND METALLURGICAL CONSULTANT 8 i

PALO ALTO LOS ANGELES HOUSTON PHOENIX DETROIT BOSTON i