ML20077A293

Forwards Rev 2 to Std GGNS-MS-48.0, GGNS COLR Safety- Related. Rept Incorporates Cycle Specific Info for GGNS Cycle 7 Operation

ML20077A293
Person / Time
Site:	Grand Gulf
Issue date:	11/10/1994
From:	Hutchinson C ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20077A297	List: ML20077A293 ML20077A298
References
GNRO-94-00134, GNRO-94-134, NUDOCS 9411220258
Download: ML20077A293 (2)

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Entargy Operations,Inc.

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November 10, 1994

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U.S. Nuclear Regulatory Commission Mail Station P1-37 Washington, D.C. 20555 Attention: Document Control Desk

Subject:

Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29 Core Operating Limits Report Submittal (Cycle 7),

Revision 2 GNRO- 94 /00134 Gentlemen:

Entergy Operations, Inc., is submitting for your use and information Revision 2 of the Core Operating Limits Report (COLR) for Grand Gulf Nuclear Station (GGNS). This report incorporates cycle specific information for GGNS Cycle 7 operation and is submitted in accordance with Technical Specification 6.9.11.1.

This revision to the GGNS COLR was made to include references to Seimens Power Corporation (SPC) letters GEXI-94/00448 and GEXI-94/00449. These letters document the calculation performed by SPC to revise the 9x9-5 peak pellet exposure and the peak rod exposure, to ensure the basis for the LHGR limits specified in the COLR remain valid for the SPC 9x9-5 fuel.

This revision was part of the corrective actions associated with a condition discovered by SPC when verifying compliance with exposure limits during the Cycle 8 design process. During this verification, Seimens design engineers discovered a condition by which some GGNS fuel assemblies could exceed their calculated peak pellet exposure prior to the end of the current cycle (Cycle 7).

Entergy Operations, Inc. has worked closely with SPC in evaluating the safety implications of this condition on Cycle 7 operation and identified several corrective 9411220258 941110 PDR ADOCK 05000416 \

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November 10, 1994 GNRO- 94 / 00134 Page 2 of 3 actions, one of which was to confirm the peak pellet exposure and the peak rod exposure are acceptable for the current cycle.

Having completed all corrective actions, Entergy Operations, Inc. has concluded that operation through Cycle 7 will not result in any fuel exceeding its analyzed exposure limit.

Yours trul s/

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a C#H/ML mtc attachment: Grand Gulf Nuclear Station Core Operating Limits Report, Revision 2 cc: Mr. J. E. Tedrow (w/a)

Mr. H. W. Keiser (w/a)

Mr. R. B. McGehee (w/a)

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

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

Mr. Stewart D. Ebneter (w/a)

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

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 13H3 Washington, D.C. 20555

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