ML081400114
| ML081400114 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 05/22/2008 |
| From: | David M NRC/NRR/ADRO/DORL/LPLIII-2 |
| To: | Pardee C Exelon Generation Co |
| Davis M, NRR/DRIP/RPRP, 415-1016 | |
| References | |
| TAC MD8456, TAC MD8457 | |
| Download: ML081400114 (5) | |
Text
May 22, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
BRAIDWOOD STATION, UNITS 1 AND 2 - REQUEST FOR SUPPLEMENTAL INFORMATION REGARDING RELIEF REQUEST I3R-01 (TAC NOS. MD8456 AND MD8457)
Dear Mr. Pardee:
By letter to the Nuclear Regulatory Commission (NRC) dated March 31, 2008, Exelon Generation Company, LLC (the licensee), submitted Relief Request 13R-01 for an alternate risk-informed selection and examination criteria for Braidwood Station, Units 1 and 2. The purpose of this letter is to provide the results of the NRC staffs acceptance review of Relief Request 13R-01. The acceptance review was performed to determine if there is sufficient technical information to allow the NRC staff to complete its detailed technical review.
Pursuant to Section 50.55a(a)(3)(i) of Title 10 of the Code of Federal Regulations (10 CFR), the applicant shall demonstrate that the proposed alternatives would provide an acceptable level of quality and safety. The NRC staff has reviewed your request and concluded that the information delineated in the enclosure to this letter is necessary to enable the NRC staff to make an independent assessment regarding the acceptability of the relief request in terms of regulatory requirements and the protection of public health and safety.
In order to make the request complete, the NRC staff requests that you supplement your March 31, 2008, submittal, to address the information requested in the enclosure by May 30, 2008. This will enable the NRC staff to begin its detailed technical review. If the information responsive to the NRC staffs request is not received by this date, the application will not be accepted for review pursuant to 10 CFR 2.101, and the NRC staff will cease its review activities associated with the request. If the request is subsequently accepted for review, you will be advised of any further information needed to support the NRC staffs detailed technical review by separate correspondence.
The information requested and associated time-frame in this letter was discussed with members of your staff on May 15, 2008.
If you have any questions, please contact Marshall David at (301) 415-1547.
Sincerely,
/RA/
Marshall J. David, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-456 and 50-457
Enclosure:
Request for Supplemental Information cc: See next page
If you have any questions, please contact Marshall David at (301) 415-1547.
Sincerely,
/RA/
Marshall J. David, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-456 and 50-457
Enclosure:
Request for Supplemental Information cc: See next page DISTRIBUTION:
PUBLIC LPL3-2 R/F RidsNrrPMMDavid RidsNrrLAEWhitt RidsNrrDciCpnb RidsRgn1MailCenter RidsNrrDorlLpl3-2 RidsNrrDraApla SDinsmore, NRR RidsOgcRp RidsAcrsAcnw&mMailCenter ADAMS Accession Number: ML081400114 NRR-106 OFFICE LPL3-2/PM LPL3-2/LA DRA/APLA/BC LPL3-2/BC NAME MDavid EWhitt (THarris for)
MRubin RGibbs DATE 05/19/08 05/16/08 05/20/08 05/22/08 OFFICIAL RECORD COPY
Braidwood Station, Units. 1 and 2 cc:
Corporate Distribution Exelon Generation Company, LLC Via e-mail Braidwood Distribution Exelon Generation Company, LLC Via e-mail Mr. Dwain W. Alexander, Project Manager Westinghouse Electric Corporation Via e-mail Ms. Bridget Little Rorem Appleseed Coordinator Via e-mail Howard A. Learner Environmental Law and Policy Center of the Midwest Via e-mail Braidwood Resident Inspector U.S. Nuclear Regulatory Commission Via e-mail Ms. Lorraine Creek RR 1, Box 182 Manteno, IL 60950 Illinois Emergency Management Agency Division of Nuclear Safety Via e-mail Will County Executive Via e-mail Attorney General Springfield, IL 62701 Via e-mail Chairman, Ogle County Board Post Office Box 357 Oregon, IL 61061
REQUEST FOR SUPPLEMENTAL INFORMATION REGARDING RELIEF REQUEST 13R-01 BRAIDWOOD STATION, UNITS 1 AND 2 DOCKET NOS. 50-456 AND 50-457 By letter to the Nuclear Regulatory Commission (NRC) dated March 31, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080910472), Exelon Generation Company, LLC (the licensee), submitted Relief Request 13R-01. The request proposed a risk-informed (RI) selection and examination program as an alternative to a portion of the current inservice inspection (ISI) program for Braidwood Station, Units 1 and 2, on the basis that the alternative provides an acceptable level of quality and safety. Exelon requested to implement an RI-ISI program based on the Revised Risk-Informed Inservice Inspection Evaluation Procedure (EPRI TR-112657, Revision B-A, December 1999).
NRC staff review of proposed RI-ISI programs is performed in accordance with Regulatory Guide (RG) 1.178, An Approach for Plant-Specific Risk-Informed Decisionmaking for Inservice Inspection of Piping, Revision 1, September 2003 (ADAMS Accession No. ML032510128).
RG 1.178 states that, when completed, Draft Guide DG-1122, An Approach for Determining the Technical Adequacy of Probabilistic Risk Assessment Results for Risk-Informed Activities, will provide guidance on determining the quality of the probabilistic risk assessment (PRA) that is sufficient to provide confidence in the results such that they can be used in regulatory decision-making for light-water reactors. DG-1122 was issued as RG 1.200, Revision 1, in January 2005 (ADAMS Accession Nos. ML070240001 and ML071940235). As clarified in Regulatory Issue Summary 2007-06, Regulatory Guide 1.200 Implementation, issued March 22, 2007 (ADAMS Accession No. ML070650428), the NRC staff will use Revision 1 of RG 1.200 to assess technical adequacy for all RI applications received after December 2007.
In order to make your request complete, the NRC staff requests that you supplement the application to address the quality of the PRA utilized for Relief Request 13R-01.
Enclosure