ML20127D065

Forwards Safety Evaluation Re Flux Reduction Using Low Leakage Fuel Mgt Schemes Per Pressurized Thermal Shock (PTS) Requirements.Facility Can Operate for 32 EFPYs Before Reaching PTS Screening Criteria

ML20127D065
Person / Time
Site:	Oconee
Issue date:	06/04/1985
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
Shared Package
ML16148A468	List: ML20127D065
References
REF-GTECI-A-49, REF-GTECI-RV, TASK-A-49, TASK-OR NUDOCS 8506240115
Download: ML20127D065 (2)

Text

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June 4.1985 y g g [> h Docket No. 50-270 DISTRIRT"0N d ocketl M ACRS-10 NRC PDR RIngram L POR HNicolaras Mr. Hal B. Tucker ORBf4 Rdg EBlackwood Vice President - Nuclear Production HThompson H0rnstein Duke Power Company OELD Llois P. O. Box 33189 EJordan GVissing 422 South Church Street BGrimes Charlotte, North Carolina 28242

Dear Mr. Tucker:

l

SUBJECT:

EVALUATION OF THE FLUX REDUCTION USING LOW LEAXAGE FUEL MANAGEMENT SCHEMES TO COMPLY WITH PTS REQUIREMENTS Re: Oconee Nuclear Station. Unit 2 We had identified several plants in need of flux reduction (or other remedial action) so they may operate for 32 Effective Full Power Years (EFPY) or to the end of their present license. Oconee Unit 2 was estimated to need a flux reduction factor of 2.4 (peak azimuthal location) to operate for 32 EFPYs without violating the NRC screening criteria. The current license for Oconee Unit 2 expires in 2007. However, based on the present evaluation, the estimated time of reaching the NRC screening criteria is beyond the year 2007. i.e., beyond the expiration date of its current license.

We reviewed your flux reduction program and also requested an independent audit calculation by our consultant, Brookhaven National Laboratory (BNL).

As noted in the enclosed Safety Evaluation (SE), we concluded that Oconee Unit 2 can operate for nearly 32 EFPYs before reaching the pressurized themal shock screening criteria. We are forwarding our SE for your information and if you desire for your coment.

Sincerely.

• calGIHAL SIG:c g 301ciR. m e ,<

John F. Stolz, Chief Operating Reactors Branch #4 -

Division of Licensing

Enclosure:

Safety Evaluation Report cc w/ enclosure:

See next page 9# DL 0 ,. :DL ORB #4gDL r ing HNitolarasicf StQl p._

/ / p/3 /85 y/Q/85 8506240115 850604 PDR ADOCK 05000270 P PDR e .___. - .

Mr. H. B. Tucker Oconee Nuclear Station, Units Duke Power Company Nos. 1, 2 and 3 cc:

Mr. William L. Porter Duke Power Company P. O. Box 33189 422 South Church Street Charlotte, North Carolina 28242 J. Michael McGarry, III, Esq.

Bishop, Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, N.W.

Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Mr. J. Ci'Bryant Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2. Box 610 Seneca, South Carolina 29678 -

Dr. J. Nelson Grace, Regional Administrator l

U.S. Nuclear Regulatory Commission, Region II 101 Marietta Street, N.W.

Suite 3100 Atlanta, Georgia 30303 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor 6f Oconee County Walhalla, South Carolina 29621

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