ML19345G497

Interim Deficiency Rept Re Turbocharger Thrust Bearing Lubrication Sys for Emergency Diesel Generators,Initially Reported on 810225.Turbocharger Lube Oil Sys Will Be Modified by Dec 1981

ML19345G497
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	03/27/1981
From:	Novarro J LONG ISLAND LIGHTING CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, SNRC-549, NUDOCS 8104070389
Download: ML19345G497 (2)

Text

( d c .- L tale f LONG ISLAND LIGHTING COM PANY OBCD

. awtuvu:r,a/ SHOREHAM NUCLEAR POWER STATION P.O. BOX 618. NORTH COUNTRY ROAD e WAOlNG RIVER, N.Y.11792 March 27, 1981 SNRC-549 Mr. Boyce H. Grier .- .. 4 'j, office of Inspection and Enforcement

g Region I U. S. Nuclear Regulatory Commission

'.y, if

-~

631 Park Avenue / .$^,j ' 'O.i King of Prussia, PA 19406 2,u/i<.J' ,q37 LONG ISLAND LIGHTING COMPANY x

' M SHOREHAM NUCLEAR PCWER STATION - UNIT 1 W LY DOCKET NO. 50-322

Dear Mr. Grier:

On February 25, 1981 in accordance with 10CFR50.55 (c), we reported verbally to Region 1 a deficiency with the turbocharger thrust bearing lubrication system for our emergency diesel gens-rators. This letter serves as our 30 day written report of this deficiency.

Description of Deficiency A defect exists in the lubricating oil system that supplies cil to the turbocharger bearings for the Class lE standby diesel gene-rators. The present system design permits lubricating oil to flow to the turbocharger bearings only when the diesel is running and prevents oil flow to the bearings when the diesel is in the standby mode. These turbochargers were manufactured by Elliott Company of Jeannette, Pa. and are used on our Transamerica Delaval supplied diesel generators. Because of the relatively long time periods between diesel operations the lube oil can drain out of the thrust bearing for the turbocharger causing premature wearing of the bearings during starting. This problem will be eliminated by modifying the turbocharger lube oil system so that the thrust bearing receives adequate oil during pre-lubing. This modification to the prelube system to lubricate the turbocharger thrust bearing will also include a restriction orifice to prevent over-lubrication of this bearing.

80l s

/

8104070 g

Mr. Bofce H. 3rier March 27, 1981 Page Two Corrective Action Transamerica Delaval and Elliott Company are aware of this problem and Delaval has reported it under 10CFR21 in a December 16, 1980 letter to the Office of Inspection and Enforcement.

Drawings detailing the system modifications correcting this problem have been proviled by Transamerica Delaval and will be implemented on our three diesel-generators by December 1981.

Very truly yours,

, / /. }' , j N ls. . . A i 4. ' D pf{, I .} (} . . a..

4:.< i n, '

J. P. Novarro Project Manager Shoreham Nuclear Power Station TJS/gmm cc: Mr. Victor Stello, Director NRC Office Inspection and Enforcement Division of Reactor Operations Inspection Washington, DC 20555 Mr. J. Higgins Site NRC Trailer