ML20046B460
| ML20046B460 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 07/16/1993 |
| From: | Gamberoni M Office of Nuclear Reactor Regulation |
| To: | Richard Anderson NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20046B461 | List: |
| References | |
| TAC-M86201, TAC-M86202, NUDOCS 9308040236 | |
| Download: ML20046B460 (2) | |
Text
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July 16,1993 3
Docket Nos. 50-282 RISTRIBUTION i
and 50-306 y R cket;Filey WShafer, RIII
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NRC & LPDRs LKopp,10/A/19 PD31 Rdg File KBohrer,12/G/18 Mr. Roger 0. Anderson, Director JRoe Licensing and Management Issues JZwolinski Northern States Power Company WDean 414 Nicollet Mall CJamerson Minneapolis, Minnesota 55401 MGamberoni OGC
Dear Mr. Anderson:
ACRS(10)
SUBJECT:
PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNIT NOS. 1 AND 2 -
DISTRIBUTION METHODOLOGY (TAC N05. M86201 AND M8620?)
In a letter dated April'12, 1993, Northern States Power Company (NSP) requested U.S. Nuclear Regulatory Commission (NRC) review of the topical report NSPNAD-93003, " Prairie Island Units I and 2 Transient Power Distribution Methodology." This topical report relates to the NSP method for core power distribution control and presents the methodology used by NSP for determination of V(z) factors. V(z) is the ratio of the transient to equilibrium predicted nuclear hot channel factor (F ", where F is the maximum local heat flux on the surface of a fuel ro$ ) divided by,"the average heat flux in the core. We have completed our review and our safety evaluation (SE) is enclosed.
Based on our evaluation, we have concluded that the NSP method used to generate a cycle-specific or generic V(z) factor for application to equilibrium F," values to bound F," values that could be measured at non-equilibrium conditions is acceptable; however, a number of requirements for cycle-specific and generic V(z) curves are provided in the enclosed SE.
L This completes our review.
If you have any questions, you may contact me at (301) 504-3024.
Sincerely, Origiral sigred by Marsha Gamberoni, Project Manager Project Directorate III-l k
Dbh b o00bG2 Division of Reactor Projects - III/IV/V P
PDn Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation 200026 E o E C+1rgg gj;'74 F
cc:
See next page 0FFICE LA:PD31 PM:PD31 (A)D:PD31 CJamersoO MGambe ni:
WDean bp KAME jkd in DATE 7/ h/93 7/ L(/93 7/[/9I COPY
/No (Ye$/No Yes/No f{ l 0FFICIAL ret 0RD COPY FILENAME: G:\\WPDOCS\\ PRAIRIE \\PI86201.SEl.
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i Mr. Roger 0. Anderson, Director Prairie Island Nuclear Generating Northern States Power Company Plant CC:
J. E. Silberg, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W.
Washington DC 20037 Mr. E. L. Watzl, Site General Manager Prairie Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Lisa R. Tiegel Assistant Attorney General Environmental Protection Division Suite 200 520 Lafayette Road St. Paul, Minnesota 55155 U.S. Nuclear Regulatory Commission Resident Inspector Office 1719 Wakonade Drive East Welch, Minnesota 55089 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Jeff Cole, Auditor / Treasurer Goodhue County Courthouse Red Wing, Minnesota 55066 Kris Sanda, Commissioner Director of Public Service 121 Seventh Place East Suite 200 i
St. Paul, Minnesota 55101-2145
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