ML080220253
| ML080220253 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 01/22/2008 |
| From: | Stang J NRC/NRR/ADRO/DORL/LPLII-1 |
| To: | Brandi Hamilton Duke Power Co |
| Stang J, NRR/DORL, 415-13456 | |
| References | |
| TAC MD4663, TAC MD4664 | |
| Download: ML080220253 (3) | |
Text
January 22, 2008 Mr. Bruce H. Hamilton Vice President McGuire Nuclear Station Duke Power Company LLC 12700 Hagers Ferry Road Huntersville, NC 28078
SUBJECT:
MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 REGARDING POST-LOSS OF COOLING ACCIDENT LONG TERM COOLING MODELS (TAC NOS. MD4663 AND 4664)
Dear Mr. Hamilton:
By letter dated January 8, 2007, Duke Power Company (the licensee) submitted information regarding post-loss of cooling accident (LOCA) long-term cooling models, specifically those dealing with precluding boron precipition. The licensee provided this information in response to the Nuclear Regulatory Commission (NRC) letter dated November 23, 2005. The November 23, 2005 letter, suspended the NRC approval for use of Westinghouse Topical Report CENPD-254-P, Post-LOCA Long Term Cooling Model, due to the discovery of the use of non-conservative modeling assumption during an NRC audit. The licensee stated in the January 8, 2007, letter that McGuire Nuclear Station, Units 1 and 2 (McGuire 1 and 2) do not rely on the methodology outlined in Westinghouse Topical Report CENPD-254-P. The licensee stated that similar analytical models have been used in the current licensing basis for McGuire 1 and 2 with respect to boron precipitation.
The NRC staff has reveiwed the information provided by the licensee in the January 8, 2007, letter. During the course of the review the NRC staff requested additional information. By letter dated November 20, 2007, the licensee provided some of the information requested by the NRC staff. In the November 20, 2007, letter and in phone calls with Mr. Kenneth Ashe of your staff, its the NRC staff understanding that McGuire 1 and 2 is working with industry to resolve the issues associated with boron precipitation evaluation methods. In addition, the licensee is actively participating in the necessary industry projects. It is important to note that McGuire 1 and 2 are not unique relative to the rest of the industry regarding boron precipitation and the McGuire 1 and 2 analytical methodology is fundamentally similar to that used by other licensees.
The licensee has committed to provide supplemental information specific to the McGuire 1 and 2 analyses of record to ensure the NRC has a full understanding of the McGuire 1 and 2 analyses.
Based on the above this will complete the NRC staff efforts under TAC Nos. MD4663 and MD4664. The NRC staff will review the licensees methodology regarding boron precipitation evaluation methods when the NRC staff receives the licensees supplemental information.
Sincerely,
/RA/
John Stang, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-369 and 50-370 cc w/encls: See next page
Based on the above this will complete the NRC staff efforts under TAC Nos. MD46631 and MD4664. The NRC staff will review the licensees methodology regarding boron precipitation evaluation methods when the NRC staff receives the licensees supplemental information.
Sincerely,
/RA/
John Stang, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-369 and 50-370 cc w/encls: See next page DISTRIBUTION:
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Accession Number: ML080220253 NRR-106 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/LPL2-1/ABC NAME JStang MO=Brien MWong DATE 1/23/08 1/22/08 1/22/08 OFFICIAL RECORD COPY
McGuire Nuclear Station, Units 1 & 2 cc:
Vice President McGuire Nuclear Station Duke Power Company, LLC 12700 Hagers Ferry Road Huntersville, NC 28078 Associate General Counsel and Managing Attorney Duke Energy Carolinas, LLC 526 South Church Street - EC07H Charlotte, North Carolina 28202 County Manager of Mecklenburg County 720 E. Fourth St.
Charlotte, NC 28202 Regulatory Compliance Manager Duke Energy Corporation McGuire Nuclear Site 12700 Hagers Ferry Road Huntersville, NC 28078 Senior Resident Inspector U.S. Nuclear Regulatory Commission 12700 Hagers Ferry Road Huntersville, NC 28078 Mecklenburg County Department of Environmental Protection 700 N. Tryon St Charlotte, NC 28202 Vice President Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road, 12th Floor Charlotte, NC 28210 NCEM REP Program Manager 4713 Mail Service Center Raleigh, NC 27699-4713 Assistant Attorney General NC Department of Justice P.O. Box 629 Raleigh, NC 27602 Manager Nuclear Regulatory Issues &
Industry Affairs Duke Energy Corporation 526 S. Church St.
Mail Stop EC05P Charlotte, NC 28202 Division of Radiation Protection NC Dept of Environment, Health & Natural Resources 3825 Barrett Dr.
Raleigh, NC 27609-7721 Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, SC 29745 Group Vice President, Nuclear Generation
& Chief Nuclear Officer P.O. Box 1006-EC07H Charlotte, NC 28201-1006 Senior Counsel Duke Energy Carolinas, LLC 526 South Church Street - EC07H Charlotte, NC 28202