ML072290531
| ML072290531 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/30/2007 |
| From: | Chernoff H NRC/NRR/ADRO/DORL/LPLI-2 |
| To: | Christian D Dominion Nuclear Connecticut |
| Lamb John G./NRR/DORL, 415-3100 | |
| Shared Package | |
| ML072290454 | List: |
| References | |
| GL-04-002, GSI-191, TAC MC4694 | |
| Download: ML072290531 (4) | |
Text
August 30, 2007 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.
Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711
SUBJECT:
MILLSTONE POWER STATION, UNIT NO. 2: REPORT ON RESULTS OF STAFF AUDIT OF CORRECTIVE ACTIONS TO ADDRESS GENERIC LETTER 2004-02 (TAC NO. MC4694)
Dear Mr. Christian:
Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors, requested that all pressurized-water reactor (PWR) licensees (1) evaluate the adequacy of the emergency sump recirculation function with respect to potentially adverse effects associated with post-accident debris, and (2) implement any plant modifications determined to be necessary. Dominion Nuclear Connecticut, Inc. (Dominion), the licensee, has conducted an evaluation of recirculation sump performance for Millstone Power Station, Unit No. 2 (Millstone Unit 2). Dominion has installed new sump strainers in Millstone Unit 2.
Consistent with the discussion in the Reasons for Information Request section of GL 2004-02, the Nuclear Regulatory Commission (NRC) staff is using sample audits to help verify that addressees have resolved the concerns identified in the GL. The staff has conducted a detailed audit of the new sump strainer design and associated analyses and testing for Millstone Unit 2.
The NRC previously forwarded the draft report to Dominion, and Dominion, after consultation with its contractors and vendors for GL 2004-02 corrective actions, has confirmed that there is no proprietary information contained in the audit report.
The enclosed audit report provides Dominion feedback on its GL 2004-02 corrective actions and supporting analyses. Also, when made publically available, this audit report will serve as a vehicle to inform other PWR licensees of the NRC staffs technical positions on various aspects of Generic Safety Issue 191, PWR Sump Performance.
The enclosed audit report does not reach a conclusion regarding overall adequacy of Dominions GL 2004-02 corrective actions. The NRC staff expects that Dominions end-of-calendar year (CY) 2007 GL 2004-02 supplemental response will respond to the open items in the enclosed audit report. This expectation has been stated in public meetings with licensees and at the audit exit meeting for the Millstone Unit 2 audit. It is reinforced in a GL 2004-02 supplemental response content guide that the NRC staff released on
D. Christian August 15, 2007 (Agencywide Documents Access and Management System Accession No. ML071060091). In early CY 2008 NRC staff consideration of Dominions end-of-CY 2007 GL 2004-02 supplemental response (including its response to audit open items) will result in a letter to Dominion assessing the overall adequacy of the Millstone Unit 2 GL 2004-02 corrective actions.
The audit team did not evaluate whether the licensee has identified and/or submitted appropriate licensing documents for its GL 2004-02 corrective actions. The audit team did not evaluate the completeness of the licensees implementation of GL 2004-02 corrective actions.
That is within the scope of the Reactor Oversight Program under Test Instruction 2515/166, Pressurized Water Reactor Containment Sump Blockage.
In conclusion, the NRC staff is appreciative of the licensees support during all phases of the audit and the assistance to the NRC staff of the Dominion GSI-191 Audit designated single point-of-contact during the preparation, conduct, and documentation phases of the audit. The staff also thanks Dominion for providing appropriate office space and facilitating the emergency core cooling system pump rooms tour taken by the audit team members.
If you have any questions, please contact John Hughey, Project Manager, at (301) 415-3204.
Sincerely,
/ra/ (RBEnnis for)
Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No:
50-336
Enclosure:
As stated cc w/encls:
See next page
D. Christian August 15, 2007 (Agencywide Documents Access and Management System Accession No. ML071060091). In early CY 2008 NRC staff consideration of Dominions end-of-CY 2007 GL 2004-02 supplemental response (including its response to audit open items) will result in a letter to Dominion assessing the overall adequacy of the Millstone Unit 2 GL 2004-02 corrective actions.
The audit team did not evaluate whether the licensee has identified and/or submitted appropriate licensing documents for its GL 2004-02 corrective actions. The audit team did not evaluate the completeness of the licensees implementation of GL 2004-02 corrective actions.
That is within the scope of the Reactor Oversight Program under Test Instruction 2515/166, Pressurized Water Reactor Containment Sump Blockage.
In conclusion, the NRC staff is appreciative of the licensees support during all phases of the audit and the assistance to the NRC staff of the Dominion GSI-191 Audit designated single point-of-contact during the preparation, conduct, and documentation phases of the audit. The staff also thanks Dominion for providing appropriate office space and facilitating the emergency core cooling system pump rooms tour taken by the audit team members.
If you have any questions, please contact John Hughey, Project Manager, at (301) 415-3204.
Sincerely,
/ra/ (RBEnnis for)
Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No:
50-336
Enclosure:
As stated cc w/encls:
See next page DISTRIBUTION:
JGolla MScott RidsNrrDss RidsNrrPMJHughey RidsNrrPMJLamb RidsNrrLAABaxter KManoly AMendiola AHiser LWhitney WRuland Package.: ML072290454 Memo.: ML072290531 Enclosure.: ML07072290550 OFFICE LPL1-2/PM LPL1-2/LA LPL2-2/LA SSIB/BC LPL1-2/BC NAME JLamb ABaxter RSola MScott HChernoff (RBEnnis for)
DATE 8/17/07 8 /30 /07 8 / 30 /07 8 / 29 /07 8/30/07 OFFICIAL RECORD COPY
Millstone Power Station, Unit No. 2 cc:
Lillian M. Cuoco, Esquire Senior Counsel Dominion Resources Services, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, CT 06385 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. Alan Price Site Vice President Dominion Nuclear Connecticut, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, CT 06385 Mr. J. W. "Bill" Sheehan Co-Chair NEAC 19 Laurel Crest Drive Waterford, CT 06385 Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terry's Plain Road Simsbury, CT 06070 Ms. Nancy Burton 147 Cross Highway Redding Ridge, CT 00870 Mr. Chris L. Funderburk Director, Nuclear Licensing and Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Mr. David W. Dodson Licensing Supervisor Dominion Nuclear Connecticut, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, CT 06385 Mr. Joseph Roy, Director of Operations Massachusetts Municipal Wholesale Electric Company Moody Street P.O. Box 426 Ludlow, MA 01056