ML20210J674

Forwards Rev 5 to GGNS-MS-48.0, Grand Gulf Nuclear Station COLR Safety-Related. Rept Incorporates Addl Cycle Specific Info for GGNS Cycle 9 Operation

ML20210J674
Person / Time
Site:	Grand Gulf
Issue date:	08/13/1997
From:	Hagan J ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20210J679	List: ML20210J674 ML20210J681
References
GNRO-97-00077, GNRO-97-77, NUDOCS 9708180259
Download: ML20210J674 (2)

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e Ente gy perations, Inc.

Port Gibson. MS 39150 Tel 601437 6408 Fax 601437 2795 Joseph J. Hagan Vee Pretadent Operabons Grand Gdt Iociuar Staban August 13, 1997 U.S. Nuclear Regulatory Commission Mail Station P1-37 Washington, D.C. 20555 Attention: Document Control Desk

Subject:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-29 Core Operating Limits Report (GGNS-MS-48.0, Revision 5) for Cycle 9 Submittal

GNRO-97/00077 l

l Gentiemen:

Entergy Operations, Inc., is submitting for your use and information Revision 5 of the Core Operating Limits Report (COLR) for Grand Gulf Nuclear station (GGNS). This report incorporates additional cycle specific information for GGNS Cycle 9 operation and is submitted in accordance with Technical Specification 5.6.5. '

GGNS Cycle-specific reload parameters for MCPR, LHGR, and MAPLHGR operating limits are controlled by the Mechanical Standard, GGNS-MS-48.0, called the Core Operating Limits Report.

The analytical methods used to determine the Cycle 9 core operating limits have been previously approved by the NRC and are listed in Technical Specification 5.6.5. In the previous COLR revision for Cycle 9 operation, LHGR operating limits were only apphcable to Siemens fuel. Consistent with the NRC Safety Evaluation for Amendment 19 to General Electric licensing topical report NEDE-24011-P-A (GESTAR 11) dated November 17,1987, APLHGR limits were used in the COLR in lieu of LHGR limits for GE11 fuel.

Although not listed in the COLR, GE11 LHGR limits for rated conditions have been monitored using the core monitoring system. This COLR revision incorporates the GE11-rated LHGR limits that are in the core monitoring system. In addition, power and flow dependent off-rated multipliers will be applied to the rated GE11 LHGR limits in the same manner that the off-rated limits are currently being applied to the GE11 MAPLHGR limits.

These changes are being made as part of the corrective action for a Condition Report which identified that when Gradient Local Peaking (GLP) is applied to the high power 7

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August 13, 1997 GNRO-97/00077 Page 2 of 2 node in a fuel bundle, the thermal margins are reduced. lncluding LHGR limits for GE11 in the COLR increases control of the information, establishes a design basis for the LHGR limits monitored by the process computer, and establishes a GGNS position that LHGR should be monitored during rated and off-rated conditions in addition to the APLHGR limits. A 10CFR50.59 safety evaluation performed for the changes determined that there were no unreviewed safety questions associated with the changes.

Should you have any questions, please contact Avinash Goel at (601) 437-6296.

Yours truly, JJH/ACG/ams attachment: COLR (GGNS-M-48.0, Revision 5) cc: Ms. J. L. Dixon-Herrity, GGNS Senior Resident (w/a)

Mr. L. J. Smith (Wise Carter) (w/a)

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

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

I

} Mr. E. W. Merschoff (w/a)

Regional Administrator U.S. Nuclear Regulatory Commission Region IV.

611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 Mr. J. N. Donohew, Project Manager (w/2)

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 13H3 Washington, D.C. 20555 Dr. E. F. Thompson (w/a)

State Health Officer State board of Health P.O. Box 1700 Jackson, MS 39205 l

t G970806