ML13353A536

2013-12 Seabrook SAMA RAI

ML13353A536
Person / Time
Site:	Seabrook
Issue date:	12/27/2013
From:	James L J Division of License Renewal
To:	Walsh K NextEra Energy Seabrook
References
TAC ME3959
Download: ML13353A536 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Kevin Walsh Site Vice President NextEra Energy Seabrook, LLC P.O. Box 300 Seabrook, NH 03874 December 27, 2013 SUBJECT: REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SEABROOK STATION LICENSE RENEWAL APPLICATION-SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW (TAC NO. ME3959) Dear Mr. Walsh: By letter dated May 25, 2010, NextEra Energy Seabrook, LLC (NextEra), submitted an application to renew the operating license for Seabrook Station, Unit 1 (Seabrook), for an additional 20 years. In support of the application and in accordance with Title 10 of the Code of Federal Regulations (1 0 CFR) Part 51 and 10 CFR Part 54, NextEra also submitted an environmental report for Seabrook. During the intervening year, NextEra updated their probabilistic risk assessment (PRA) and by letter dated March 19, 2012, provided a supplemental severe accident mitigation alternatives (SAMA) analysis based on a PRA update. The staff is reviewing the information contained in the license renewal application, the associated environmental report, and the supplemental SAMA analysis, and has identified, in the enclosure, an area where additional information is needed to complete the SAMA review. The item in the enclosure was discussed with your staff and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3306 or by e-mail at lots.iames@nrc.gov. Docket No. 50-443 Enclosure: As stated cc w/encl: Listserv Sincerely, Lois J. James, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Mr. Kevin Walsh Site Vice President NextEra Energy Seabrook, LLC P.O. Box 300 Seabrook, NH 03874 December 27, 2013 SUBJECT: REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SEABROOK STATION LICENSE RENEWAL APPLICATION-SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW (TAG NO. ME3959) Dear Mr. Walsh: By letter dated May 25, 2010, NextEra Energy Seabrook, LLC (NextEra), submitted an application to renew the operating license for Seabrook Station, Unit 1 (Seabrook), for an additional 20 years. In support of the application and in accordance with Title 10 of the Code of Federal Regulations (10 CFR) Part 51 and 10 CFR Part 54, NextEra also submitted an environmental report for Seabrook. During the intervening year, NextEra updated their probabilistic risk assessment (PRA) and by letter dated March 19, 2012, provided a supplemental severe accident mitigation alternatives (SAMA) analysis based on a PRA update. The staff is reviewing the information contained in the license renewal application, the associated environmental report, and the supplemental SAMA analysis, and has identified, in the enclosure, an area where additional information is needed to complete the SAMA review. The item in the enclosure was discussed with your staff and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3306 or by e-mail at lois.james@nrc.gov. Docket No. 50-443 Enclosure: As stated cc w/encl: Listserv DISTRIBUTION: See following pages ADAMS Accession No

• ML 13353A536 .. OFFICE LA:DLR PM:RPB2:DLR NAME I King* LJames DATE 12/20/2013 12/24/2013 Sincerely, IRA/ Lois J. James, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation *via email BC:AADB:DRA BC:RPB2:DLR JDozier* BWittick 12/13/2013 12/26/2013 OFFICIAL RECORD COPY PM:RPB2:DLR LJames 12/27/2013 Letter to Kevin Walsh from Lois James dated December 27, 2013 SUBJECT: REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SEABROOK STATION LICENSE RENEWAL APPLICATION-SSEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW (TAC NO. ME3959) DISTRIBUTION: HARD COPY: DLRRF E-MAIL: PUBLIC RidsNrrDir Resource RidsNrrDirRpb1 Resource RidsNrrDirRpb2 Resource RidsNrrDirRarb Resource RidsNrrDirRasb Resource RidsNrrDirRerb Resource RidsNrrDraApla Resource Listserv Lois.James@nrc.gov Richard. Plasse@nrc.gov Brian.Wittick@nrc.gov Yoira. Diaz-Sanabria@nrc.gov John. Lamb@nrc.gov David. Mel ntyre@n rc. gov Eugene. Dacus@nrc.gov Brian. Harris@nrc.gov Glenn. Dental@nrc.gov Paul. Cataldo@nrc.gov Chris. Newport@nrc.gov Jasmine.Gilliam@nrc.gov Nancy. McNamara@nrc.gov Doug. Tiff@nrc.gov Neil. Sheehan@nrc.gov Diane.Screnci@nrc.gov Request for Additional Information Regarding the Analysis of Severe Accident Mitigation Alternatives For the Seabrook Station License Renewal Review In order to support the staff analysis of conservatisms in the NextEra Energy Seabrook, LLC (NextEra}, severe accident mitigation alternatives (SAMA) analysis, the following information is needed. A. Weather Files: The SAMA analysis included in the weather file for the year 2005. Weather files for all 5 years are needed to support the analysis of conservatisms. Provide the remaining 4 years of weather data. B. Dose Conversion Coefficient File: NextEra implemented what appears to be a custom dose conversion file in the SAMA analysis. The exact version of the dose conversion factor file used by Next Era in the SAMA analysis is needed to support our evaluation of conservatisms. Provide the exact version of the dose conversion factor file. ENCLOSURE