ML073170244

Closure of Confirmatory Action Letter NRR-07-021 (TAC Nos. MD4163 and MD4164)

ML073170244
Person / Time
Site:	North Anna
Issue date:	11/29/2007
From:	Catherine Haney Plant Licensing Branch III-2
To:	Christian D A Virginia Electric & Power Co (VEPCO)
Jervey, Richard 301-415-2728
References
TAC MD4163, TAC MD4164, NRR-07-021
Download: ML073170244 (4)

Text

November 29, 2007

Mr. David A. Christian President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrooks Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

NORTH ANNA POWER STATION, UNIT NOS. 1 AND 2 - CLOSURE OF CONFIRMATORY ACTION LETTER NRR-07-021 (TAC NOS. MD4163 AND MD4164)

Dear Mr. Christian:

On March 29, 2007, the U.S. Nuclear Regulatory Commission (NRC) issued Confirmatory Action Letter (CAL) No. NRR-07-021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070820079) regarding dissimilar metal welds in the pressurizer surge, spray, and safety/relief nozzle-to-safe-end welds at North Anna Power Station, Unit Nos. 1 and 2 (North Anna Units 1 and 2). This letter acknowledges receipt of Virginia Electric Power Company's (Dominion's) letter dated October 4, 2007, (ADAMS Accession No. ML072780140) informing the NRC of actions taken in response to this CAL at North Anna Unit 1. The NRC has previously acknowledged actions taken at North Anna Unit 2 by letter dated September 12, 2007, (ADAMS Accession No. ML072130002).

The Dominion letter stated that six full structural mitigative preemptive weld overlays (PWOLs) for the pressurizer safety, spray, relief, and surge nozzles were performed during the fall 2007 refueling outages for Unit 1, in accordance with relief request CMP-022R1. The surface and volumetric examinations of the weld and base material were completed with no recordable indications. The acceptance examination of the PWOLs resulted in 100 percent coverage for all overlay weld volume. However, due to a previous weld repair during initial fabrication which changed the geometry of the nozzle on the 'A' pressurizer safety valve nozzle-to-safe-end weld, only 99.8 percent of coverage for the preservice examination of the inservice inspection (ISI) examination volume was obtained. This coverage is consistent with the revision to CMP-022R1 provided to the NRC on October 1, 2007 (ADAMS Accession No. ML072750064). The pre-service examinations of the lSI examination volume resulted in 100 percent coverage for the remaining five PWOLs.

Based on the Dominion letters, the NRC concluded that all the commitments listed in the CAL and supporting commitment letter (ADAMS Accession No. ML070570535) have been met for North Anna Units 1 and 2. No further response is required regarding the CAL. We consider the CAL closed. As such, it is no longer necessary to implement enhanced inspection and leakage monitoring requirements for the reactor coolant system. This action closes TAC No. MD4163.

TAC NO. MD4164 was closed previously.

Thank you for informing us of the actions documented in your letter. These actions may be examined during a future NRC inspection of your facility.

Current NRC guidance regarding CALs is contained in the NRC Enforcement Policy and the NRC Enforcement Manual, which are available at the NRC web site at http://www.nrc.gov/about-nrc/regulatory/enforcement.html (click on Enforcement Policy or Enforcement Guidance) or by contacting the Government Printing Office (GPO) toll-free at 1-888-293-6498. The GPO is open from 7:00 a.m. to 9:00 p.m. EST, Monday through Friday (except Federal holidays).

In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter and your response will be made available electronically for public inspection in t he NRC Public Document Room or from the NRC

=s document system (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm.html.

Sincerely,

/RA/ Catherine Haney, Director Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Docket Nos. 50-338 and 50-339

cc: See next page

ML073170244 OFFICE DCI/CPNB DCI/CPNB LPL2-1/PM LPL2-1/LA LPL2-1/BC

NAME TLupold TChan RJervey MO'Brien EMarinos DATE 11/27/07 11/27/07 11/15/07 11/20/07 11/21/07

OFFICE DCI/D DRP/D RII DORL/D NAME MEvans CCasto CHaney DATE 11/28/07 11/27/07 11/29/07 North Anna Power Station, Units 1 & 2

cc:

Mr. David A. Christian President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrooks Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

Mr. C. Lee Lintecum County Administrator Louisa County Post Office Box 160 Louisa, Virginia 23093

Ms. Lillian M. Cuoco, Esq.

Senior Counsel Dominion Resources Services, Inc.

120 Tredegar Street, RS-2 Richmond, VA 23219

Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23218

Old Dominion Electric Cooperative 4201 Dominion Blvd.

Glen Allen, Virginia 23060

Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.

Innsbrook Technical Center 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711

Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219

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

Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218

Mr. Mark D. Sartain, Director Nuclear Safety & Licensing Virginia Electric and Power Company North Anna Power Station P. O. Box 402 Mineral, VA 23117