ML20205C689

Part 21 Rept Re Potential Defect in Centerline,Inc Lube Oil Check Valves of Dsr Standby Diesel Generator Which Could Result in Engine Nonavailability.Valve Seat Matl Will Be Changed to Buna N.List of Tdi Part 21 Repts Encl

ML20205C689
Person / Time
Site:	River Bend, Rancho Seco, 05000000
Issue date:	09/17/1985
From:	Guntrum B TRANSAMERICA DELAVAL, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-85, REF-PT21-85-420-000, REF-PT21-85-421-000 PT21-85-420, PT21-85-420-000, PT21-85-421, NUDOCS 8509230104
Download: ML20205C689 (9)

Text

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Transamanca s ; '*"; 2 0 ,o'", L , n gglgggl 650 85th Av;nus P.O. Box 2:61 Oakland, Calitornia 94621

, (415) 577 7400 ld Septaber 17, 1985 Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission Washington, D.C. 20555

Dear Sir:

In accordance with the requirements of Title 10, Chapter 10.

Code of Federal Regulations, Part 21, Transamerica Delaval Inc., hereby notifies the comission of a potential defect in a cmponent of a DSR Standby Diesel Generator. Were exists a potential probimi with the lube Oil Check Valves, which could result in engine non-availability.

Transamerica Delaval has supplied DSR engines with the potential defect to the following sites:

Utility Site Serial Ntuber Gulf States Utilities River Bend 74039/40 SbOD Rancho Seco 81015/16 he Check Valves are manufactured by Centerline, Inc. , hisa, Oklahmn. W ese Valves are used in the on-engine lubricating oil systmi; one (1) per engine.

At the SMUD, Rancho Seco site, it was recently noted that the liner seat material was deteriorating. Further, that this material was marked "B/25", the manufacturers code for ethylene propylene rubber (EPR). EPR is not suitable for use with petroleum base materials.

We action necessary to correct this potential defect is to change the valve seat material to BUNA N, a suitable material for this application. Wis can be accomplished by replacing the existing valve in the field. 1 A copy of this letter will be sent to all of the sites in para-graph 2 of this letter as indicated by the cc's. l Technical services and any parts or information will be furnished as required, on request, and in accordance with the individual contract.

8509230104 050917 M

i PDR ADOCK 05000312 S PDR l

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l Transamenca Delaval NE Page 2 Septaber 17, 1985 Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Cmmission Since action is required by others, we cannot estimate when the corrective action will be empleted.

Our evaluation of this potential problan was empleted on Septaber 16, 1985.

Very truly yours,

'%eb. -

B. C. Guntrum Manager, Quality Assurance BCG:hw Enclosure l

Transamenca Delaval BE Page 3 Septaber 17, 1985 Director, Office of Inspection and Enforement U.S. Nuclear Regulatory Ccmnission cc: Gulf States Utilities Co.

Stone & Webster Engin. Co.

Cherry Hill Operations Center 3 Fr.ecutive Campus P.O. Bax 5200 G erry Hill, New Jersey 08034 Attention: Project Manager (J.O. No.12210)

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L. R. Keilnun Nuclear Engineering i>ept. , M.S. 32 F.O. Bax 15830 Sacramento, CA 95813 Sacramento Municipal Utility Dist.

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