ML081490572
| ML081490572 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Kewaunee, Surry, North Anna  |
| Issue date: | 05/29/2008 |
| From: | Siva Lingam NRC/NRR/ADRO/DORL/LPLII-1 |
| To: | Gerald Bichof Virginia Electric & Power Co (VEPCO) |
| Lingam, Siva NRR/DORL 415-1564 | |
| References | |
| GL-04-002, TAC MC4691, TAC MC4694, TAC MC4695, TAC MC4696, TAC MC4697, TAC MC4722, TAC MC4723 | |
| Download: ML081490572 (7) | |
Text
May 29, 2008 Mr. Gerald T. Bischof Vice President, Nuclear Engineering Virginia Electric and Power Company Richmond, Virginia 23261
SUBJECT:
KEWAUNEE POWER STATION, MILLSTONE POWER STATION, UNITS 2 AND 3, NORTH ANNA POWER STATION, UNITS 1 AND 2, AND SURRY POWER STATION, UNITS 1 AND 2, REQUEST FOR EXTENSION OF COMPLETION DATES FOR GENERIC LETTER 2004-02 CORRECTIVE ACTIONS (TAC NOS. MC4691, MC4694, MC4695, MC4696, MC4697, MC4722 AND MC4723)
Dear Mr. Bischof:
By letter dated May 22, 2008 (Agencywide Document Access and Management System (ADAMS)
Accession No. ML081430612), Dominion Energy Kewaunee, Inc., Dominion Nuclear Connecticut, Inc., and Virginia Electric and Power Company requested an interim extension of the containment sump clogging corrective actions stated in Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors, from May 31, 2008 to June 30, 2008 for Kewaunee Power Station (Kewaunee);
Millstone Power Station, Units 2 and 3 (Millstone 2 and 3), North Anna Power Station, Unit Nos.
1 and 2 (North Anna 1 and 2), and Surry Power Station, Unit Nos. 1 and 2 (Surry 1 and 2).
Based on the enclosed U.S. Nuclear Regulatory Commission (NRC) staff evaluation, the NRC has approved the request for extension for completion of GL 2004-02 corrective actions from May 31, 2008 to June 30, 2008.
Sincerely,
/RA/
Siva P. Lingam, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-305, 50-336, 50-423, 50-338, 50-339, 50-280 and 50-281
Enclosures:
Evaluation for Kewaunee, Millstone 2 and 3, North Anna 1 and 2, and Surry 1 and 2 cc w/encl: See next page
ML081490572 *transmitted by memo dated OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/DSS/SSIB/D NRR/LPL2-1/BC NAME SLingam GLappert for MO=Brien WRuland MWong DATE 5/28/08 5/29/08 5/27/08*
5/29/08
INTERIM EXTENSION REQUEST FOR CONTAINMENT SUMP CORRECTIVE ACTIONS ASSOCIATED WITH GENERIC LETTER 2004-02 KEWANEE POWER STATION, MILLSTONE POWER STATION, UNITS 2 AND 3, NORTH ANNA POWER STATION, UNIT NOS. 1 AND 2, AND SURRY POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-305, 50-336, 50-423, 50-338, 50-339, 50-280 AND 50-281 By letter dated May 22, 2008 (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML081430612), Dominion Energy Kewaunee, Inc. (DEK), Dominion Nuclear Connecticut, Inc., (DNC) and Virginia Electric and Power Company (Dominion) requested an interim extension to the U.S. Nuclear Regulatory Commission (NRC) Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors" (GL 2004-02), for the Kewaunee Power Station (Kewaunee),
Millstone Power Station, Units 2 and 3 (Millstone 2 and 3), North Anna Power Station, Unit Nos.
2 and 3 (North Anna 1 and 2), and Surry Power Station Unit Nos. 2 and 3 (Surry 1 and 2). The requested interim extension is from May 31, 2008 to June 30, 2008. The stated intent of this extension was to allow DEK, DNC and Dominion additional time to support NRC review of a longer term extension requested by letter dated May 21, 2008 (ADAMS Accession No.ML081420793),
and the accompanying detailed justifications.
The NRC previously approved an extension for completion of Kewaunee, Millstone 2 and 3, North Anna 1 and 2, and Surry 1 and 2 sump clogging corrective actions from the GL 2004-02 due date of December 31, 2007, until May 31, 2008 (NRC letter dated December 13, 2007, ADAMS Accession No. ML073450594).
DEK, DNC and Dominions May 22, 2008, letter states that the request for an additional extension is due to the realization that not all of the remaining corrective actions can be completed by May 31, 2008. The remaining corrective actions, as described in the NRC letter dated December 13, 2007, are identified below.
Kewaunee complete final documentation summarizing the results of recent Kewaunee strainer testing activities and the overall performance of Kewaunees sump strainer arrangement complete revision to the Kewaunee downstream effects evaluations
Millstone 2 and 3 / North Anna 1 and 2 / Surry 1 and 2 complete a revised downstream effects evaluations for components, including reactor vessel and fuel complete chemical effects evaluations and bench-top testing to determine likely precipitate formation and bounding quantities precipitates complete reduced-scale (head loss) testing to determine the effects of chemical precipitate formation make a determination of, and schedule for, associated hardware and/or procedural modifications (if any)
The NRC based the reviews for granting extensions to the due date for completion of GL 2004-02 corrective actions on the criteria stated in SECY-06-0078. Specifically, an extension may be granted if:
the licensee has a plant-specific technical/experimental plan with milestones and schedule to address outstanding technical issues with enough margin to account for uncertainties, and the licensee identifies mitigative measures to be put in place prior to December 31, 2007, and adequately describes how these mitigative measures will minimize the risk of degraded emergency core cooling system (ECCS) and containment spray system (CSS) functions during the extension period.
The SECY-06-0078 also states that for proposed extensions beyond several months, a licensees request will more likely be accepted if the proposed mitigative measures include temporary physical improvements to the ECCS sump or materials inside containment to better ensure a high level of ECCS sump performance.
DEK, DNC and Dominions letter dated May 22, 2008, interim extension request is supported by the previous extension request approval basis included in the NRC December 13, 2007, letter, which addressed these criteria for each plant. DEK, DNC and Dominion have stated that these bases remain valid and applicable to this interim-short term extension request and that they continue to confirm that Kewaunee, Millstone 2 and 3, North Anna 1 and 2, and Surry 1 and 2 will continue to meet their current plant licensing bases regarding the function and operability of the containment sumps during the period of the requested extensions in that:
The plants have completed considerable physical and analytical activities to provide a high level of Emergency Core Cooling System (ECCS) and Recirculation Spray (RS) System (as applicable) performance including replacing the ECCS and RS strainers with significantly larger ones, the plants have implemented mitigative measures to minimize the risk of degraded ECCS and RS (as applicable) functions during the extension period, and
the plants have plant specific plans with milestones and schedules to address the outstanding technical issues with sufficient conservatism to address uncertainties.
Additionally, even though a detailed, quantitative risk assessment is not required for short-term extension requests, the extension request letter dated November 15, 2007 (ADAMS Accession No.ML073190553), provides plant risk evaluations. The NRC staff has not reviewed the analysis in detail; but agrees with DEK, DNC and Dominions conclusion that the risk, due to the proposed one-month interim extension period, is very small and is bounded by the risk associated with the extension period previously approved in the NRC letter dated December 13, 2007.
The NRC staff believes that DEK, DNC and Dominion have established that there is reasonable assurance during the requested interim period that Kewaunee, Millstone 2 and 3, North Anna 1 and 2, and Surry 1 and 2 will provide acceptable strainer function with adequate margin for uncertainties. Furthermore, the NRC concluded that DEK, DNC and Dominion have put mitigation measures in place at Kewaunee, Millstone 2 and 3, North Anna 1 and 2, and Surry 1 and 2 to reduce vulnerability to debris blockage and downstream effects for the proposed extension period.
The additional time requested in the letter dated May 22, 2008, is short and considered to be of low safety concern given the mitigation measures and plant improvements already in place.
Based on the licensee having satisfactorily addressed the NRC GL 2004-02 due date extension criteria as discussed above, the NRC staff finds it is acceptable to extend the completion date for GL 2004-02 corrective actions for Kewaunee, Millstone 2 and 3, North Anna 1 and 2, and Surry 1 and 2 to June 30, 2008.
Kewaunee Power Station, Millstone Power Station, Units 2 and 3, North Anna Power Station, Unit Nos. 1 and 2, and Surry Power Station, Unit Nos. 1 & 2 cc:
Mr. David A. Christian President and Chief Nuclear Officer Virginia Electrical and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Ms. Lillian M. Cuoco, Esq.
Senior Counsel Dominion Resources Services, Inc.
120 Tredegar Street, RS-2 Richmond, VA 23219 Mr. Donald E. Jernigan 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 Post Office Box 1197 Richmond, Virginia 23218 Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711 Mr. C. Lee Lintecum County Administrator Louisa County Post Office 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 P. O. Box 490 Mineral, Virginia 23117 Mr. Daniel G. Stoddard Site Vice President North Anna Power Station Virginia Electric and Power Company Post Office Box 402 Mineral, Virginia 23117-0402 Mr. William R. Matthews Senior Vice President, Nuclear Operations Virginia Electrical and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711
Kewaunee Power Station, Millstone Power Station, Units 2 and 3, North Anna Power Station, Unit Nos. 1 and 2, and Surry Power Station, Unit Nos. 1 & 2 cc:
Edward L. Wilds, Jr., Ph.D.
Director, Division of Radiation Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 First Selectmen Town of Waterford 15 Rope Ferry Road Waterford, CT 06385 Charles Brinkman, Director Washington Operations Nuclear Services Westinghouse Electric Company 12300 Twinbrook Pkwy, Suite 330 Rockville, MD 20852 Senior Resident Inspector Millstone Power Station c/o U.S. Nuclear Regulatory Commission P. O. Box 513 Niantic, CT 06357 Mr. J. W. "Bill" Sheehan Co-Chair NEAC 19 Laurel Crest Drive Waterford, CT 06385 Ms. Nancy Burton 147 Cross Highway Redding Ridge, CT 00870 Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terrys Plain Road Simsbury, CT 06070 Mr. Joseph Roy Director of Operations Massachusetts Municipal Wholesale Electric Company P.O. Box 426 Ludlow, MA 01056 Mr. William D. Bartron Licensing Supervisor Dominion Nuclear Connecticut, Inc.
Building 475, 5th Floor Roper Ferry Road Waterford, CT 06385 Mr. J. Alan Price Site Vice President Dominion Nuclear Connecticut, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, CT 06385 Ms. Leslie N. Hartz Dominion Energy Kewaunee, Inc.
Kewaunee Power Station N 490 Highway 42 Kewaunee, WI 54216 Resident Inspectors Office U. S. Nuclear Regulatory Commission N490 Highway 42 Kewaunee, WI 54216-9510 Mr. Thomas L. Breene Dominion Energy Kewaunee, Inc.
Kewaunee Power Station N490 Highway 42 Kewaunee, WI 54216