ML081220158

Closure of Confirmatory Action Letter NRR-07-025

ML081220158
Person / Time
Site:	San Onofre
Issue date:	05/15/2008
From:	Catherine Haney Plant Licensing Branch III-2
To:	Rosenblum R Southern California Edison Co
Kalyanam N, NRR/DORL/LPL4, 415-1480
References
TAC MD4181, TAC MD4182, NRR-07-025
Download: ML081220158 (4)

Text

May 15, 2008

Mr. Richard M. Rosenblum Senior Vice President and Chief Nuclear Officer Southern California Edison Company San Onofre Nuclear Generating Station P. O. Box 128 San Clemente, CA 92674-0128

SUBJECT:

SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 - CLOSURE OF CONFIRMATORY ACTION LETTER NRR-07-025 (TAC NOS.

MD4181 AND MD4182)

Dear Mr. Rosenblum:

On March 22, 2007, the U.S. Nuclear Regulatory Commission (NRC) issued Confirmatory Action Letter (CAL) No. NRR-07-025 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070800004) regarding dissimilar metal welds in the pressurizer at San Onofre Nuclear Generating Station (SONGS), Units 2 and 3. This letter acknowledges receipt of your letters dated December 24, 2007 and February 8, 2008 (ADAMS Accession Nos.

ML081090184 and ML081090185, respectively), informing the NRC of actions taken in response to this CAL at SONGS, Units 3 and 2.

In your December 24, 2007 letter, you stated that during the recent Unit 3 mid-cycle outage, mitigation of the Unit 3 pressurizer surge line nozzle weld was completed and post-mitigation inspections were performed. The results of these inspections were provided to the NRC by letter dated November 9, 2007 (ADAMS Accession No. ML073170693). No suspected flaw indications, such as lack of bond, weld flaws, planar flaws, or laminar flaws, were observed during the examinations.

In your letter dated February 8, 2008, you stated that during the Unit 2 Cycle 15 refueling outage, mitigation of the pressurizer surge line nozzle weld was completed and post-mitigation inspections were performed. The results of these inspections were provided to the NRC by letter dated December 24, 2007 (ADAMS Accession No. ML073610392). No suspected flaw indications, such as lack of bond, weld flaws, planar flaws, or laminar flaws, were observed during the examinations.

Based on your letters, the NRC has found that all the commitments listed in the CAL, and supporting commitment letter dated March 7, 2007 (ADAMS Accession No. ML070680042) have been met. No further response is required regarding the CAL. The NRC staff considers the CAL closed. As such, it is no longer necessary to implement enhanced inspection and leakage monitoring requirements for the reactor coolant system. The Technical Assignment Control (TAC) Nos. MD4181 and MD4182 have been closed.

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 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 Title 10 of the Code of Federal Regulations Section 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 the 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. 50-361 and 50-362

cc: See next page

ML081220158

• via e-mail OFFICE DCI/CPNB DCI/CPNB LPLX-X/PM LPL4/LA LPL4/BC NAME JCollins TChan KKalyanam GLappert THiltz DATE 5/2/08 5/2/08 5/1/08 5/1/08 5/8/08 OFFICE DCI/D DRP/D RIV DORL/D NAME MEvans DChamberlain CHaney DATE 5/6/08 5/6/08(*)

5/15/08

San Onofre Nuclear Generating Station (December 2007)

Units 2 and 3

cc:

Douglas K. Porter, Esquire Southern California Edison Company 2244 Walnut Grove Avenue Rosemead, CA 91770

Dr. David Spath, Chief Division of Drinking Water and Environmental Management California Dept. of Health Services 850 Marina Parkway, Bldg P, 2 nd Floor Richmond, CA 94804

Chairman, Board of Supervisors County of San Diego 1600 Pacific Highway, Room 335 San Diego, CA 92101

Mark L. Parsons Deputy City Attorney City of Riverside 3900 Main Street Riverside, CA 92522

Mr. Gary L. Nolff Assistant General Manager - Resources Riverside Public Utilities City of Riverside, California 3901 Orange Street Riverside, CA 92501

Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064

Mr. Michael L. De Marco San Diego Gas & Electric Company 8315 Century Park Ct. CP21G San Diego, CA 92123-1548

Resident Inspector San Onofre Nuclear Generating Station c/o U.S. Nuclear Regulatory Commission Post Office Box 4329 San Clemente, CA 92674 Mayor City of San Clemente 100 Avenida Presidio San Clemente, CA 92672

Mr. James T. Reilly Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128

Mr. James D. Boyd California State Liaison Officer Vice Chair and Commissioner California Energy Commission 1516 Ninth Street, MS 31 Sacramento, CA 95814

Mr. Gary Butner Acting Branch Chief Department of Public Health Services Radiologic Health Branch MS 7610, P.O. Box 997414 Sacramento, CA 95899-7414

Mr. Ross T. Ridenoure Vice President and Site Manager Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128

Mr. A. Edward Scherer Director, Nuclear Regulatory Affairs Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128