ML16141A810

Requests Addl Info to Continue Staff Review of Licensee Submitting TR DPC-NE-2007P, Fuel Reconstitution Analysis Methodology

ML16141A810
Person / Time
Site:	Oconee, Mcguire, Catawba, McGuire
Issue date:	04/26/1994
From:	Wiens L Office of Nuclear Reactor Regulation
To:	Tuckman M DUKE POWER CO.
References
TAC-M88082, NUDOCS 9405030301
Download: ML16141A810 (6)

Text

April 26, 1994 Docket Nos. 50-269, 50-270, 50-287 50-369, 50-370 50-413 and 50-414 Mr. M. S. Tuckman Senior Vice President Nuclear Generation Duke Power Company P. 0. Box 1006 Charlotte, North Carolina 28201-1006

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING DPC-NE-2007P, "FUEL RECONSTITUTION ANALYSIS METHODOLOGY" (TAC NO. M88082)

By letter dated September 23, 1993, Duke Power Company (DPC) submitted Topical Report DPC-NE-2007P, "Fuel Reconstitution Analysis Methodology," to the NRC for review. We find that additional information, as indicated in the enclosure, is required to complete our review. If you have questions regarding this matter, contact me at (301) 504-1495.

This request affects fewer than ten respondents and, therefore, it is not subject to Office of Management and Budget review under P.L.96-511.

Sincerely,

/s/

L. A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects -

I/II Office of Nuclear Reactor Regulation

Enclosure:

Request for Additional Information cc w/enclosure:

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 26, 1994 Docket Nos. 50-269, 50-270, 50-287 50-369, 50-370 50-413 and 50-414 Mr. M. S. Tuckman Senior Vice President Nuclear Generation Duke Power Company P. 0. Box 1006 Charlotte, North Carolina 28201-1006

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING DPC-NE-2007P, "FUEL RECONSTITUTION ANALYSIS METHODOLOGY" (TAC NO. M88082)

By letter dated September 23, 1993, Duke Power Company (DPC) submitted Topical Report DPC-NE-2007P, "Fuel Reconstitution Analysis Methodology," to the NRC for review.

We find that additional information, as indicated in the enclosure, is required to complete our review.

If you have questions regarding this matter, contact me at (301) 504-1495.

This request affects fewer than ten respondents and, therefore, it is not subject to Office of Management and Budget review under P.L.96-511.

Sincerely, L. A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects -

I/II Office of Nuclear Reactor Regulation

Enclosure:

Request for Additional Information cc w/enclosure:

See next page

Duke Power Company Catawba Nuclear Station McGuire Nuclear Station Oconee Nuclear Station cc:

Dr. John M. Barry Mr. Steve Benesole Mecklenburg County Department of Environmental Comp Protection Oconee Nuclear Site 700 N Tryon Street P. 0. Box 1439 Charlotte, North Carolina 29202 Seneca, South Carolina 29679 County Manager of Mecklenburg County Mr. Robert B. Borsum 720 East Fourth Street Babcock & Wilcox Charlotte, North Carolina 28202 Nuclear Power Division Mr. Robert 0. Sharpe Suit 525 Compliance Rockville, Maryland 20852 Duke Power Company McGuire Nuclear Site Manager, LIS 12700 Hagers Ferry Road NUS Corporation Huntersville, North Carolina 28078 2650 McCormick Drive, 3rd Floor Senior Resident Inspector Clearwater, Flordia 34619-1035 c/o U.S. Nuclear Regulatory Senior Resident Inspector Commission U.S. Nuclear Regulatory Commission 12700 Hagers Ferry Road Route 2, Box 610 Huntersville, North Carolina 28078 Seneca, South Carolina 29678 Mr. Dayne H. Brown, Director Mr. David L. Rehn Department of Environmental Vice President, Catawba Site Health and Natural Resources Duke Power Company Division of Radiation Protection 4800 Concord Road P. 0. Box 27687 Raleigh, North Carolina 27611 Office of IntergovernmentalC.

McMeekin Offie ofIntrgovrnmetalVice President, McGuire Site Relations 116 West Jones StreetDuke Power Company 116 estJone Steet12700 Hagers Ferry Road Raleigh, North Carolina 27621 Huntersville, North Carolina 28078 County Supervisor of Oconee County Elaine Wathen, Lead REP Planner Walhalla, South Carolina 27621 Division of Emergency Management 116 West Jones Street Mr. J. W. Hampton Vice President, Oconee Site Duke Power Company P. 0. Box 1439 Seneca, South Carolina 29679

Duke Power Company Catawba Nuclear Station McGuire Nuclear Station Oconee Nuclear Station cc:

Mr. Z. L. Taylor Mr. Marvin Sinkule, Chief Regulatory Compliance Manager Project Branch #3 Duke Power Company U.

S. Nuclear Regulatory Commission 4800 Concord Road 101 Marietta Street, NW Suite 2900 York, South Carolina 29745 Atlanta, Georgia 30323 A. V. Carr, Esquire North Carolina Electric Membership Duke Power Company Corporation 422 South Church Street P. 0. Box 27306 Charlotte, North Carolina 28242 Raleigh, North Carolina 27611 J. Michael McGarry, III, Esquire Saluda River Electric Cooperative, Winston and Strawn Inc.

1400 L Street, NW.

P. 0. Box 929 Washington, DC 20005 Laurens, South Carolina 29360 North Carolina Municipal Power Senior Resident Inspector Agency Number 1 Route 2, Box 179N 1427 Meadowwood Boulevard York, South Carolina 29745 P. 0..Box 29513 Raleigh, North Carolina 27626 Regional Administrator, Region II U.S. Nuclear Regulatory Commission Mr. T. Richard Puryear 101 Marietta Street, NW Suite 2900 Nuclear Technical Services Manager Atlanta, Georgia 30323 Westinghouse Electric Corporation Carolinas District Max Batavia, Chief 2709 Water Ridge Parkway, Suite 430 Bureau of Radiological Health Charlotte, North Carolina 28217 South Carolina Department of Health and Environmental Control County Manager of York County 2600 Bull Street York County Courthouse York, South Carolina 29745 Ms. Karen E. Long Richard P. Wilson, Esquire Assistant Attorney General Assistant Attorney General North Carolina Department of Justice S.C. Attorney General's Office P. 0. Box 629 P. 0. Box 11549 Columbia, South Carolina 29211 Mr. G. A. Copp Piedmont Municipal Power Agency Licensing -

ECO50 121 Village Drive Duke Power Company Greer, South CaroMina 29651 P. 0. Box 1006 Charlotte, North Carolina 28201-1006

Questions on DPC-NE-2007P, "Duke Power Company Fuel Reconstitution Analysis Methodology"

1. What effect will the replacement of up to 10 fuel rods with inert filler rods have on the fuel assembly lift-off analysis for hot and cold (zero power) conditions?

2. Are replacement rod engagements based on hot or cold (zero power) conditions? If they are based on cold conditions, what are the expected radial and axial hot dimensions of the solid stainless-steel filler rods for the Mark-B and Mark-BW fuel assemblies? Also, please provide a description of how assembly growth is determined and the growth model used in the engagement analysis.

3. The methodology described in the submittal has been proposed for use with fuel assemblies comprised of mixing-vane spacers and fuel assemblies comprised of standard spacers. Will the actual reconstitution of damaged fuel rods also include the replacement of spacer grids? If so, will spacer designs be mixed in the assembly reconstitution, i.e., will mixing-vane spacers be used on fuel assemblies comprised of standard spacers or standard spacers used on fuel assemblies comprised of mixing-vane spacers?

4. In order to assist in the review of the submittal document, please provide Reference 7 of the submittal, BAW-10189P, "CHF Testing and Analysis of the Mark-BW Fuel Assembly Design," so that the use of the BWC and the BWCMV CHF correlations with reconstituted assemblies can be assessed. We would also like the CHF test data on magnetic media for further examination.

5. What criteria has been established to decide whether a damaged fuel rod will be replaced by a depleted uranium rod, solid inert rod, or left vacant? Of particular concern are the reasons for leaving a vacancy rather than using a replacement rod. Please provide all possible scenarios for why a grid position would be left vacant in a reconstituted fuel assembly.

The following questions are related to the use of vacant fuel rod positions in a reconstituted fuel assembly.

6. The reconstitution methodology presented in the submittal is supported by analyses performed for either up to 10 inert filler rods or 4 water holes. Are combinations of inert filler rods and water holes allowed in a reconstituted assembly? If so, in what combinations? Please provide the appropriate mechanical analyses because no analyses have been presented in the submittal.

7. Please demonstrate that a vacancy will not increase the potential for fretting wear in the surrounding fuel rod locations.

This demonstration should include any contributing factors such as grid damage and fretting test data verifying any analyses.

8. Please demonstrate that differential nuclear peaking resulting from a vacant fuel rod position would not lead to abnormal asymmetric growth of the adjacent grids and fuel rods.

9. What effect will the replacement of up to 4 fuel rods with vacancies have on the fuel assembly lift-off analysis for hot and cold (zero power) conditions?

10.

Please provide test data demonstrating that the absence of four fuel rods will not have an adverse effect on the spacer grid crush strength for seismic/LOCA loads.

11.

Please provide the details of analyses of the fuel assembly structural response to externally applied forces due to seismic/LOCA loading on a fuel assembly containing four vacant fuel rod positions. These analyses should consider the most conservative geometric locations for the vacant rods.