ML071800086

Closure of Confirmatory Action Letter NRR-07-012

ML071800086
Person / Time
Site:	Byron
Issue date:	07/17/2007
From:	Catherine Haney Plant Licensing Branch III-2
To:	Crane C Exelon Generation Co
kuntz, Robert , NRR/DORL, 415-3733
References
TAC MD4137, NRR-07-012
Download: ML071800086 (5)

Text

July 17, 2007 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

BYRON STATION, UNIT NO. 2 - CLOSURE OF CONFIRMATORY ACTION LETTER NO. NRR-07-012 (TAC NO. MD4137)

Dear Mr. Crane:

On March 22, 2007, the U.S. Nuclear Regulatory Commission (NRC) issued Confirmatory Action Letter (CAL) No. NRR-07-012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070740325) regarding dissimilar metal welds in the pressurizer at Byron Station (Byron), Unit No. 2. This letter acknowledges receipt of your letter dated June 4, 2007 (ADAMS Accession No. ML071560272) informing the NRC of actions taken in response to this CAL.

In your letter, you stated the actions and commitments confirmed in CAL No. NRR-07-012 have been completed for Byron, Unit No. 2. Full structural weld overlays, with primary water stress corrosion cracking resistant material, were installed on Byron, Unit No. 2 pressurizer surge, spray, safety, and relief nozzle butt welds and safe end butt welds containing Alloy 82/182 material. The overlays were completed in spring 2007 refueling outage (B2R13). All six Byron, Unit No. 2 pressurizer connections weld overlays were volumetrically examined in accordance with the requirements of Relief Request 13R-08. Results of the examinations were transmitted to the NRC by letter dated May 4, 2007 (ADAMS Accession No. ML071240370).

Based on your letter, the NRC staff has found that all the commitments listed in the CAL and supporting commitment letter (ADAMS Accession No. ML070520499) have been met. 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.

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 regulations and the NRC Enforcement Policy are available at the NRC web site at http://www.nrc.gov/materials/miau/mat-toolkits.html and http://www.nrc.gov/what-wedo/

regulatory/enforcement 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).

C. Crane In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter will be made available electronically for public inspection in the NRC Public Document Room or from the NRCs document system (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html.

Sincerely,

/RA/

Catherine Haney, Director Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. STN 50-455 cc: See next page

ML071800086 NRR-106 OFFICE DCI/CPNB LPL3-2/PM LPL3-2/LA LPL3-2/BC DORL/D NAME TLupold RKuntz EWhitt RGibbs CHaney DATE 7/9/07 7/2/07 7/2/07 7/6/07 7/17/07 OFFICE DCI/D DRP/D, RGN3 NAME MEvans CPederson (S.West for)

DATE 7/9/07 7/17/07

Byron Station, Unit Nos. 1 and 2 Plant Manager - Byron Station via e-mail cc:

Site Vice President - Byron Station Regional Administrator, Region III via e-mail U.S. Nuclear Regulatory Commission 2443 Warrenville Road, Suite 210 Senior Vice President - Operations Support Lisle, IL 60532-4352 via e-mail Illinois Emergency Management Agency Chairman Division of Disaster Assistance & Will County Board of Supervisors Preparedness Will County Board Courthouse 1035 Outer Park Dr Joliet, IL 60434 Springfield, IL 62704 Director - Licensing and Regulatory Affairs Document Control Desk - Licensing via e-mail via e-mail Manager Regulatory Assurance - Byron Mr. Dwain W. Alexander, Project Manager via e-mail via e-mail Associate General Counsel Howard A. Learner via e-mail Environmental Law and Policy Center of the Midwest Vice President - Regulatory Affairs 35 East Wacker Drive via e-mail Suite 1300 Chicago, IL 60601-2110 Manager Licensing - Braidwood/Byron via e-mail U.S. Nuclear Regulatory Commission Byron Resident Inspectors Office Senior Vice President - Midwest Operations 4448 North German Church Road via e-mail Byron, IL 61010-9750 Vice President - Regulatory Affairs Ms. Lorraine Creek via e-mail RR 1, Box 182 Manteno, IL 60950 Manager Licensing - Braidwood, Byron and LaSalle Chairman, Ogle County Board via e-mail P.O. Box 357 Oregon, IL 61061 Senior Vice President - Midwest Operations via e-mail Mrs. Phillip B. Johnson 1907 Stratford Lane Mr. Barry Quigley Rockford, IL 61107 3512 Louisiana Rockford, IL 61108 Attorney General 500 S. Second Street Springfield, IL 62701