ML072290531

Report on Results of Staff Audit of Corrective Actions to Address Generic Letter 2004-02

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: ML072290531 ML072290550
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 Mr. J. W. "Bill" Sheehan Senior Counsel Co-Chair NEAC Dominion Resources Services, Inc. 19 Laurel Crest Drive Building 475, 5th Floor Waterford, CT 06385 Rope Ferry Road Waterford, CT 06385 Mr. Evan W. Woollacott Co-Chair Edward L. Wilds, Jr., Ph.D. Nuclear Energy Advisory Council Director, Division of Radiation 128 Terry's Plain Road Department of Environmental Protection Simsbury, CT 06070 79 Elm Street Hartford, CT 06106-5127 Ms. Nancy Burton 147 Cross Highway Regional Administrator, Region I Redding Ridge, CT 00870 U.S. Nuclear Regulatory Commission 475 Allendale Road Mr. Chris L. Funderburk King of Prussia, PA 19406 Director, Nuclear Licensing and Operations Support First Selectmen Dominion Resources Services, Inc.

Town of Waterford Innsbrook Technical Center 15 Rope Ferry Road 5000 Dominion Boulevard Waterford, CT 06385 Glen Allen, VA 23060-6711 Charles Brinkman, Director Mr. David W. Dodson Washington Operations Nuclear Services Licensing Supervisor Westinghouse Electric Company Dominion Nuclear Connecticut, Inc.

12300 Twinbrook Pkwy, Suite 330 Building 475, 5th Floor Rockville, MD 20852 Rope Ferry Road Waterford, CT 06385 Senior Resident Inspector Millstone Power Station Mr. Joseph Roy, c/o U.S. Nuclear Regulatory Commission Director of Operations P.O. Box 513 Massachusetts Municipal Wholesale Niantic, CT 06357 Electric Company Moody Street Mr. J. Alan Price P.O. Box 426 Site Vice President Ludlow, MA 01056 Dominion Nuclear Connecticut, Inc.

Building 475, 5th Floor Rope Ferry Road Waterford, CT 06385