ML030940283
| ML030940283 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 04/04/2003 |
| From: | Gratton C, Stephen Monarque NRC/NRR/DLPM/LPD2 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| Gratton C, NRR/DLPM 415-1055 | |
| References | |
| TAC MB5599, TAC MB5600, TAC MB5601, TAC MB5602 | |
| Download: ML030940283 (5) | |
Text
April 4, 2003 Mr. David A. Christian Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060
SUBJECT:
NORTH ANNA AND SURRY POWER STATIONS, UNITS 1 AND 2 - REVIEW OF ANNUAL REPORT OF EMERGENCY CORE COOLING SYSTEM EVALUATION MODEL CHANGES PURSUANT TO 10 CFR 50.46 (TAC NOS. MB5599, MB5600, MB5601, AND MB5602)
Dear Mr. Christian:
The purpose of this letter is to notify you of the results of the NRC staffs review of the Annual Report of Emergency Core Cooling System (ECCS) Evaluation Model Changes for North Anna and Surry Power Stations, Units 1 and 2. Pursuant to Title 10 of the Code of Federal Regulations (10 CFR) Sections 50.46(a)(3)(i) and 50.46(a)(3)(ii), Virginia Electric and Power Company (VEPCO), in its letter dated June 21, 2002, as supplemented by letter dated November 15, 2002, submitted changes to the ECCS evaluation model that affected the 1981 Westinghouse Large-Break Loss-of-Coolant Accident (LBLOCA) Evaluation Models that are used at North Anna and Surry Power Stations. 10 CFR 50.46(a)(3)(i) requires licensees to estimate the effect of any change or error in any evaluation model for the purpose of determining if the change or error is significant. 10 CFR 50.46(a)(3)(ii) requires licensees to report the nature of this change or error and its estimated effect on the limiting ECCS analysis to the NRC staff on an annual basis. Furthermore, if the change or error is significant, then the licensee is required to submit a proposed schedule for providing reanalysis or taking other action as may be needed to demonstrate compliance with the 10 CFR 50.46 requirements.
In a letter dated June 21, 2002, VEPCO submitted changes to the ECCS evaluation model for Surry, Units 1 and 2. The NRC staff has determined that these changes were not significant since the sum of the absolute magnitudes of the respective temperature changes of the fuels calculated peak cladding temperature was less than 50°F. As such, VEPCO has complied with the reporting requirements of 10 CFR 50.46.
By letter dated June 21, 2002, VEPCO submitted changes to the ECCS evaluation model for North Anna, Units 1 and 2. During the course of its review, the NRC staff identified significant changes to the small-break LOCA (SBLOCA) and LBLOCA analyses for North Anna, Units 1 and 2. Subsequently, VEPCO, in its submittal dated November 15, 2002, committed to reanalyzing the SBLOCA no later than April 30, 2005, and referenced its February 2, 2001, letter that established a commitment date of April 30, 2003, to reanalyze the North Anna LBLOCA. As such, the NRC staff has determined that the commitment dates to reanalyze the SBLOCA and LBLOCA analyses meet the reporting requirements of 10 CFR 50.46. However, the NRC staff notes that the ECCS evaluation model changes for North Anna, Units 1 and 2, are valid only for Westinghouse reloads and do not apply to non-Westinghouse or mixed reloads.
Mr. David A. Christian
- 2 -
The NRC staff has completed its evaluation of this request; therefore, we are closing out TAC Nos. MB5599, MB5600, MB5601, and MB5602.
Sincerely,
/RA/
/RA/
Stephen Monarque, Project Manager Christopher Gratton, Sr. Project Manager Project Directorate II, Section 1 Project Directorate II, Section 1 Division of Licensing Project Management Division of Licensing Project Management Office of Nuclear Reactor Regulation Office of Nuclear Reactor Regulation Docket Nos. 50-280, 50-281, 50-338, and 50-339 cc: See next page
ML030940283 OFFICE PM:PDII-1 LA:PDII-2 SC:PDII-1 SC:SRXB SC:PDII-1 NAME SMonarque EDunnington CGratton FAkstulewicz JNakoski DATE 03/21/03 03/21/03 04/03/03 03/27/03 04/03/03
Mr. David A. Christian Virginia Electric and Power Company cc:
Ms. Lillian M. Cuoco, Esq.
Senior Nuclear Counsel Dominion Nuclear Connecticut, Inc.
Millstone Power Station Building 475, 5th Floor Rope Ferry Road Rt. 156 Waterford, Connecticut 06385 Mr. Richard H. Blount, II Site Vice President Surry Power Station Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883-0315 Senior Resident Inspector Surry Power Station U. S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Virginia 23883 Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation P. O. Box 1197 Richmond, Virginia 23209 Robert B. Strobe, M.D., M.P.H.
State Health Commissioner Office of the Commissioner Virginia Department of Health P.O. Box 2448 Richmond, Virginia 23218 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Stephen P. Sarver, Director Nuclear Licensing & Operations Support Innsbrook Technical Center Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711 Mr. David A. Heacock Site Vice President North Anna Power Station Virginia Electric and Power Company P. O. Box 402 Mineral, Virginia 23117-0402 Mr. C. Lee Lintecum County Administrator Louisa County P.O. Box 160 Louisa, Virginia 23093 Old Dominion Electric Cooperative 4201 Dominion Blvd.
Glen Allen, Virginia 23060 Senior Resident Inspector North Anna Power Station U.S. Nuclear Regulatory Commission 1024 Haley Drive Mineral, Virginia 23117 Mr. William R. Matthews Vice President - Nuclear Operations Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, Virginia 23060-6711