ML080230308
| ML080230308 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/28/2008 |
| From: | Stang J NRC/NRR/ADRO/DORL/LPLII-1 |
| To: | Morris J Duke Power Co |
| Stang J, NRR/DORL, 415-1345 | |
| References | |
| TAC MD4661, TAC MD4662 | |
| Download: ML080230308 (4) | |
Text
Janaury 28, 2008 Mr. J. R. Morris Site Vice President Catawba Nuclear Station Duke Power Company LLC 4800 Concord Road York, SC 29745
SUBJECT:
CATAWBA NUCLEAR STATION, UNITS 1 AND 2 REGARDING POST-LOSS OF COOLING ACCIDENT LONG TERM COOLING MODELS (TAC NOS.
MD4661 AND 4662)
Dear Mr. Morris:
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 of NRC approval for use of Westionhouse 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 Catawba Nuclear Station Unints 1 and 2 (Catawba 1 and 2) do not rely on the methodology outline in Westionhouse Topical Report CENPD-254-P. The licensee stated that similar analytical models have been used in the current licensing basis for Catawba 1 and 2 with respect to boron precipitation.
The NRC staff has reveiwed the information provided by the licnesee in the January 8, 2007, letter. During the course of the review the NRC staff requested additional information (RAI). 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. Randell Hart of your staff its the NRC staff understanding that Catawba 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 Catawba 1 and 2 is not unique relative to the rest of the industry regarding boron precipitation and the Catawba 1 and 2 analytical methodology is fundamentally similar to that used by other licensee.
The licensee has committed to provide supplemental information specific to the Catawba 1 and 2 analyses of record to ensure the NRC has a full understanding of the Catawba analyses.
Based on the above this will complete the NRC staff efforts under TAC NOS. MD4661 and MD4662. 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. 50-413 and 50-414 cc w/encls: See next page
Based on the above this will complete the NRC staff efforts under TAC NOS. MD4661 and MD4662 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. 50-413 and 50-414 cc w/encls: See next page DISTRIBUTION:
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RidsNrrDorlDpr Accession Number: ML080230308 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/LPL2-1/BC (A)
NAME JStang MO=Brien MWong DATE 1/28/08 1/28/08 1/28/08 OFFICIAL RECORD COPY
Catawba Nuclear Station, Units 1 & 2 Page 1 of 2 cc:
Site Vice President Catawba Nulcear Station Duke Power Company, LLC 4800 Concord Road York, SC 29745 Associate General Counsel and Managing Attorney Duke Energy Carolinas, LLC 526 South Church Street - EC07H Charlotte, North Carolina 28202 Regulatory Compliance Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 North Carolina Municipal Power Agency Number 1 1427 Meadowwood Boulevard P.O. Box 29513 Raleigh, North Carolina 27626 County Manager of York County York County Courthouse York, South Carolina 29745 Piedmont Municipal Power Agency 121 Village Drive Greer, South Carolina 29651 Assistant Attorney General North Carolina Department of Justice P.O. Box 629 Raleigh, North Carolina 27602 NCEM REP Program Manager 4713 Mail Service Center Raleigh, North Carolina 27699-4713 North Carolina Electric Membership Corp.
P.O. Box 27306 Raleigh, North Carolina 27611 Senior Resident Inspector U.S. Nuclear Regulatory Commission 4830 Concord Road York, South Carolina 29745 Assistant Director Division of Waste Management Bureau of Land and Waste Management Dept. of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201-1708 Manager Nuclear Regulatory Issues and Industry Affairs Duke Energy Corporation 526 South Church Street Mail Stop EC05P Charlotte, North Carolina 28202 Saluda River Electric P.O. Box 929 Laurens, South Carolina 29360 Vice President Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road 12th Floor Charlotte, North Carolina 28210 Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 Senior Counsel Duke Energy Carolinas, LLC 526 South Church Street - EC07H Charlotte, NC 28202
Catawba Nuclear Station, Units 1 & 2 Page 2 of 2 cc:
Division of Radiation Protection NC Dept. of Environment, Health, and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721 Group Vice President, Nuclear Generation and Chief Nuclear Officer P.O. Box 1006-EC07H Charlotte, NC 28201-1006