ML20072G712

Forwards Revised Ref Page to Proposed Amend to OL (PCOL-94/02) for GGNS Dtd 940617,correcting Document Number Listed for Transamerica Delaval,Inc EDGs Owners Group Generic TR from TAC-M85325 to TDI-EDG-001-A

ML20072G712
Person / Time
Site:	Grand Gulf
Issue date:	08/17/1994
From:	Hutchinson C ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GNRO-94-00107, GNRO-94-107, TAC-M85325, NUDOCS 9408250070
Download: ML20072G712 (3)

Text

e M Entergy Operations,Inc.

ENTERGY -

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C. R. Hutchinson

n. h. H August. 17, 1994 C J n <,

U. S. Nuclear Regulatory Commission Mail Station Pl-37 Washington, D.C. 20555 Attention: Document Control Desk

Subject:

Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29 Operating License Amendments Emergency Diesel Generator Maintenance and Surveillance, Supplement 1 Proposed Amendment to the Operating License (PCOL-94/02)

GNRO-94/ 00107 Gentlemen:

Attached is a supplement to an Entergy Operations' Proposed Amendment to the Operating License (PCOL-94/02), for Grand Gulf Nuclear Station dated June 17, 1994. This supplement corrects the document number contained in Reference 1. The original letter listed the Transamerica Delaval, Inc. Emergency Diesel Generators Owners Group, Generic Topical Report with a report number of TAC-M85325, the correct number should be TDI-EDG-001-A. The attached page contains this change.

If you have any questions, please contact James Owens at (601) 437-6483.

rs truly, 7 '%

. til!JEO/m attachment: Revised Reference Page cc: (See Next Page) c ..

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i August 17, 1994 GNRO-94/ 00107 Page 2 of 3 cc: hir. R. I1. Bernhard (w/a) hir. II. W. Keiser (w/a) hir. R. B. hicGehee (w/a)

Mr. N. S. Reynolds (w/a)

Mr. II. L. Thomas (w/o)

Afr. Stewart D. Ebneter (w/a)

Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 h1arietta St., N.W., Suite 2900 Atlanta, Georgia 30323 Mr. P. W. O'Connor, Project hianager (w/2)

Oflice of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 13I13 Washington, D.C. 20555 Dr. Eddie F. Thompson (w/a)

State IIcalth Oflicer State Boaid ofIIcalth P.O. Box 1700 Jackson, Mississippi 39205 i

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the'teardowns and inspections would decrease the consequences of an accident because the availability of the engines would increase as a result of the less frequent teardowns.

Additionally, the high average reliability of the TDI engines would not be negatively affected due to this change. NRC research has shown there is a period of decreased reliability immediately following intrusive teardowns, (break in period), followed by a long period of high reliability.

2. Create the possibility of a new or different kind of accident from any previously evaluated:

The proposed amendment would not create the possibility of a new or difTerent kind of accident from any accident previously evaluated. The proposed amendment will not cause any physical change to the plant or the design or operation of the diesel units.

3. Inv >lve a significant decrease in the margin of safety.

The proposed amendment would not involve a significant reduction in a margin of safety.

The proposed amendment will increase the reliability and availability of the EDGs and therefore will not result in a decrease in a margin of safety at Grand Gulf.

E.

REFERENCES:

1. Transamerica Delaval, Inc. Emergency Diesel Generators Owners Group, Generic Topical Report, TDI-EDG-001-A, " Basis for Modification to Requirements for Transamerica Delaval, Inc. Emergency Diesel Generators," dated April 28,1994,

2. NRC Safety Evaluation Report , " Operability and Reliability Review of Emergency Diesel Generators Manullictured by Transamerica Delaval, Inc." dated March 17,1994.

3. NUREG/CR-5057, K. R. Iloopingarner and F. R. Zaloudek, " Aging Mitigation and improved Programs fbr Nuclear Service Diesel Generators," Pacific Northwest Laboratory, PNL-6397, December 1989.

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