ML103130159

Request for Additional Information Related to the Review of the Seabrook Station License Renewal Application

ML103130159
Person / Time
Site:	Seabrook
Issue date:	11/18/2010
From:	Plasse R License Renewal Projects Branch 2
To:	Freeman P NextEra Energy Seabrook
Plasse, R, A., NRR/DLR, 415-1427
References
TAC ME4028
Download: ML103130159 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 18, 2010 Mr. Paul Freeman Site Vice President c/o Mr. Michael OKeefe NextEra Energy Seabrook, LLC P.O. Box 300 Seabrook, NH 03874

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE REVIEW OF THE SEABROOK STATION LICENSE RENEWAL APPLICATION (TAC NO. ME4028)

Dear Mr. Freeman:

By letter dated May 25, 2010, NextEra Energy Seabrook, LLC, submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54, to renew the Operating License NPF-86 for Seabrook Station, Unit 1, for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review.

The request for additional information was discussed with Mr. Rick Cliche, and a mutually agreeable date for the response is within 45 days from the date of this letter. If you have any questions, please contact me at 301-415-1427 or bye-mail at richard.plasse@nrc.gov.

Sincerely, Richard Plas e, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-443

Enclosure:

As stated cc w/encl: Distribution via Listserv

Seabrook Station License Renewal Application Request for Additional Information Set 2 RAI4.2.1-1

Background

The Seabrook Station, Unit 1, license renewal application (LRA) states that fluence values were calculated using the RAMA methodology, which, as noted in the LRA, has not been approved by the U.S. Nuclear Regulatory Commission for generic use at pressurized water reactors. The LRA states, "This prior work has been extended in the Seabrook Station analysis to additional PWR benchmarks and plant-specific dosimetry comparisons, further validating the use of RAMA for aI/light water reactor designs. "

Regulatory Basis RG 1.190, RP 1.3.3: The capsule fluence is extremely sensitive to the geometrical representation of the capsule geometry and internal water region, and the adequacy of the capsule representation must be demonstrated.

RG 1.190, RP 1.4: The calculational methodology must be qualified by both (1) comparisons to measurement and calculational benchmarks and (2) an analytic uncertainty analysis. The methods used to calculate the benchmarks must be consistent (to the extent possible) with the methods used to calculate the vessel fluence. The overall calculational bias and uncertainty must be determined by an appropriate combination of the analytic uncertainty analysis and the uncertainty analysis based on the comparisons to the benchmarks.

Request Please provide documentation of the referenced additional PWR benchmarks and plant-specific dosimetry comparisons to demonstrate adherence to the regulatory positions described above.

ENCLOSURE

'.. ML103130159 *concurrence via e-mail OFFICE LA:DLR PM:RPB2:DLR OGC (NLO) BC:RPB2:DLR PM:RPB2:DLR NAME SFigueroa* RPIasse MSpencer DWrona RPlasse DATE 11/10/10 11/18/10 11/15/10 11/18/10 11/18/10

Letter to P. Freeman from R. Plasse dated November 18, 2010

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE REVIEW OF THE SEABROOK STATION LICENSE RENEWAL APPLICATION (TAC NO. ME4028)

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PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsNrrDraApla Resource JSusco RPlasse BPham DWrona EMiller ICouret, OPA EDacus,OCA MSpencer, OGC WRaymond, RI DTifft, RI NMcNamara, RI NSheehan, RI DScrenci, RI JJohnson, RI ABurritt, RI ENCLOSURE