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, 2007Mr. Christopher M. CranePresident 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 ConfirmatoryAction 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 havebeen 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 andsupporting 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 forthe reactor coolant system.Thank you for informing us of the actions documented in your letter. These actions may beexamined during a future NRC inspection of your facility.Current NRC regulations and the NRC Enforcement Policy are available at the NRC web site athttp://www.nrc.gov/materials/miau/mat-toolkits.html and http://www.nrc.gov/what-w edo/regulatory/enforcement or by contacting the Government Printing Office (GPO) toll-free at1-888-293-6498. The GPO is open from 7:00 a.m. to 9:00 p.m. EST, Monday through Friday (except Federal holidays).

C. Crane-2-In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter will bemade 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/adams.html.Sincerely,/RA/Catherine Haney, Director Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. STN 50-455cc: See next page

ML071800086NRR-106 OFFICEDCI/CPNBLPL3-2/PMLPL3-2/LALPL3-2/BCDORL/DNAMETLupoldRKuntzEWhittRGibbsCHaney DATE7/9/07 7/2/07 7/2/07 7/6/077/17/07 OFFICEDCI/DDRP/D, RGN3 NAMEMEvansCPederson(S.West for)DATE 7/9/07 7/17/07 Byron Station, Unit Nos. 1 and 2 cc:

Regional Administrator, Region IIIU.S. Nuclear Regulatory Commission 2443 Warrenville Road, Suite 210 Lisle, IL 60532-4352Illinois Emergency Management AgencyDivision of Disaster Assistance &

Preparedness 1035 Outer Park Dr Springfield, IL 62704Document Control Desk - Licensingvia e-mailMr. Dwain W. Alexander, Project Managervia e-mailHoward A. LearnerEnvironmental Law and Policy Center of the Midwest 35 East Wacker Drive Suite 1300 Chicago, IL 60601-2110U.S. Nuclear Regulatory CommissionByron Resident Inspector's Office 4448 North German Church Road Byron, IL 61010-9750Ms. Lorraine CreekRR 1, Box 182 Manteno, IL 60950Chairman, Ogle County BoardP.O. Box 357 Oregon, IL 61061Mrs. Phillip B. Johnson1907 Stratford Lane Rockford, IL 61107Attorney General500 S. Second Street Springfield, IL 62701Plant Manager - Byron Station via e-mailSite Vice President - Byron Stationvia e-mailSenior Vice President - Operations Supportvia e-mailChairmanWill County Board of Supervisors Will County Board Courthouse Joliet, IL 60434Director - Licensing and Regulatory Affairsvia e-mailManager Regulatory Assurance - Byronvia e-mailAssociate General Counsel via e-mailVice President - Regulatory Affairsvia e-mailManager Licensing - Braidwood/Byronvia e-mailSenior Vice President - Midwest Operationsvia e-mailVice President - Regulatory Affairsvia e-mailManager Licensing - Braidwood, Byron and LaSalle via e-mailSenior Vice President - Midwest Operationsvia e-mailMr. Barry Quigley 3512 Louisiana Rockford, IL 61108