ML16188A187

Request for Additional Information for the Review of the LaSalle County Station License Renewal Application, Severe Accident Mitigation Alternative (SAMA) Sensitivity Analysis

ML16188A187
Person / Time
Site:	LaSalle
Issue date:	07/06/2016
From:	William Ford NRC/NRR/DLR/RERB
To:	Gallagher M Exelon Corp
William Ford
References
Download: ML16188A187 (3)

Text

From: Ford, William To: michaelp.gallagher@exeloncorp.com

Subject:

FW: REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LASALLE COUNTY STATION LICENSE RENEWAL APPLICATION, SEVERE ACCIDENT MITIGATION ALTERNATIVE (SAMA) SENSITIVITY ANALYSIS Date: Wednesday, July 06, 2016 5:28:00 PM From: Ford, William Sent: Wednesday, July 06, 2016 5:17 PM To: 'michaelp.gallagher@exeloncorp.com' <michaelp.gallagher@exeloncorp.com>

Subject:

FW: REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LASALLE COUNTY STATION LICENSE RENEWAL APPLICATION, SEVERE ACCIDENT MITIGATION ALTERNATIVE (SAMA)

SENSITIVITY ANALYSIS From: Ford, William Sent: Wednesday, July 06, 2016 5:09 PM To: 'michaelp.gallahger@exeloncorp.com' <michaelp.gallahger@exeloncorp.com>

Cc: 'Ranek, Nancy L.:(GenCo-Nuc)' <Nancy.Ranek@exeloncorp.com>; Mitchell, Jeffrey

<Jeffrey.Mitchell2@nrc.gov>; Plasse, Richard <Richard.Plasse@nrc.gov>; Danna, James

<James.Danna@nrc.gov>; Wachutka, Jeremy <Jeremy.Wachutka@nrc.gov>; Mcintyre, David

<David.McIntyre@nrc.gov>; Kunowski, Michael <Michael.Kunowski@nrc.gov>; Mitlyng, Viktoria

<Viktoria.Mitlyng@nrc.gov>; Chandrathil, Prema <Prema.Chandrathil@nrc.gov>; Logaras, Harral

<Harral.Logaras@nrc.gov>; Lipa, Christine <Christine.Lipa@nrc.gov>; Sheldon, Stuart

<Stuart.Sheldon@nrc.gov>; Ruiz, Robert <Robert.Ruiz@nrc.gov>; Robbins, John

<John.Robbins@nrc.gov>; Dozier, Jerry <Jerry.Dozier@nrc.gov>; RidsNrrDlr Resource

<RidsNrrDlr.Resource@nrc.gov>; RidsNrrDlrRpb1 Resource <RidsNrrDlrRpb1.Resource@nrc.gov>;

RidsNrrDlrRerb Resource <RidsNrrDlrRerb.Resource@nrc.gov>; RidsNrrDlrRarb Resource

<RidsNrrDlrRarb.Ressource@nrc.gov>; RidsNrrDlrRasb Resource

<RidsNrrDlrRasb.Resource@nrc.gov>; RidsNrrDlrRsrg Resource <RidsNrrDlrRsrg.Resource@nrc.gov>;

RidsNrrPMLaSalle Resource <RidsNrrPMLaSalle.Resource@nrc.gov>; RidsOpaMail Resource

<RidsOpaMail.Resource@nrc.gov>; RidsOgcMailCenter Resource

<RidsOgcMailCenter.Resource@nrc.gov>

Subject:

REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE LASALLE COUNTY STATION LICENSE RENEWAL APPLICATION, SEVERE ACCIDENT MITIGATION ALTERNATIVE (SAMA)

SENSITIVITY ANALYSIS

Dear Mr. Gallagher:

By letter dated December 9, 2014, Exelon Generation Co., LLC, submitted an application pursuant to Title 10 of the Code of Federal Regulations (10 CFR) Part 51 and 10 CFR Part 54, to renew the operating license NPF-11 & NPF-18 for LaSalle County Station, 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 the associated environmental report. The staff has identified below, an area where additional information is needed to

ML16188A187 OFFICE PM:RERP:DLR BC:RERP:DLR PM:RERP:DLR NAME W Ford J Danna W Ford DATE 7 / 6 /2016 7 / 6 /2016 7 / 6 /2016

The NRC Staff believes the Commissions decision in CLI-16-07 may be applicable to the SAMA analysis performed for LaSalle County Station Units 1 and 2, inasmuch as that analysis may have also relied upon the NUREG-1150 values for TIMDEC and CDNFRM.

We therefore request that Exelon Generation Company, LLC either justify why CLI-16-07 does not apply to the SAMA analysis performed for LaSalle County Station, Units 1 and 2 or supplement the SAMA analysis with sensitivity analyses for the CDNFRM and TIMDEC values.

Exelon Generation Company, LLC is requested to review the input values specified in CLI-16-07 for the Indian Point LRA, and (1) to apply the maximum values specified by the Commission (one year (365 days) for TIMDEC and $100,000 for the CDNFRM values for the decontamination factor of 15) or, in the alternative, (2) to explain, with sufficient justification, its rationale for choosing any other value(s) for its sensitivity analyses. In any event, Exelon Generation Company, LLC should execute sensitivity analyses for the release categories modeled that exceed 1015 Becquerels of Cs-137 released. Exelon Generation Company, LLC is requested to evaluate how these sensitivity analyses may affect its identification of potentially cost-beneficial SAMAs. Finally, upon completing its sensitivity analysis, Exelon Generation Company, LLC is requested to submit the spreadsheet (or equivalent table if another method is used) that conveys the population dose and off-site economic cost for each release category and integrates the results into a Population Dose Risk and an Offsite Economic Cost Risk for LaSalle County Station, Units 1 and 2.