ML16183A283

Summary of 06/27/2016 Telephone Conference Call Between NRC and Exelon Generation Co., LLC Concerning Draft Request for Additional Information Pertaining to the LaSalle County Station License Renewal Application (TAC MF5347 & TAC MF5346)

ML16183A283
Person / Time
Site:	LaSalle
Issue date:	07/08/2016
From:	William Ford Division of License Renewal
To:	Exelon Generation Co
William, Ford, NRR/DLR, 415-1263
References
TAC MF5346, TAC MF5347
Download: ML16183A283 (6)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 8, 2016 LICENSEE:

Exelon Generation Co., LLC FACILITY:

LaSalle County Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JUNE 27, 2016 BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION CO., LLC, CONCERNING A DRAFT REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE LASALLE COUNTY STATION LICENSE RENEWAL APPLICATION (TAC. NOS. MF5347 & MF5346)

U.S. Nuclear Regulatory Commission staff and representatives of Exelon Generation Company, LLC held a telephone conference call on June 27, 2016, to discuss and clarify a staff requests for additional information (RAIs) concerning the LaSalle County Station license renewal application. The telephone conference call was useful in clarifying the intent of the staffs draft RAI.

provides a listing of the participants and Enclosure 2 contains a listing of the draft RAI discussed with the applicant, including a brief description of the discussion.

The applicant had an opportunity to comment on this summary.

Sincerely,

/RA/

William Ford, Sr. Physical Scientist Environmental Review and Projects Branch Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-373 and 50-374

Enclosures:

1) List of Participants

2) List of RAI cc w/encls: See next page

ML16183A283

• Concur on cover memo only OFFICE LA:DLR*

PM:RERP:DLR BC:RERP:DLR PM:RERP:DLR NAME IBetts WFord JDanna WFord DATE 7/6/16 7/7/16 7/8/16 7/8/16

ENCLOSURE TELEPHONE CONFERENCE CALL LASALLE COUNTY STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS JUNE 27, 2016 PARTICIPANTS AFFILIATIONS Nancy Ranek Exelon Generation Co., LLC John Huffnagel Exelon Generation Co., LLC Grant Teagarden Exelon Generation Co., LLC William Ford U.S. Nuclear Regulatory Commission (NRC)

James Danna NRC Tam Tran NRC Lois James NRC David Drucker NRC Jerry Dozier NRC

ENCLOSURE 2 REQUEST FOR ADDITIONAL INFORMATION LICENSE RENEWAL APPLICATION June 27, 2016 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC held a telephone conference call on June 27, 2016, to discuss and clarify the following requests for additional information (RAIs) concerning the license renewal application (LRA).

DRAFT RAI By letter dated December 9, 2014, Exelon Generation Company, 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 licenses NPF-11 & NPF-18 for LaSalle County Station, Units 1 and 2, 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.

On May 4, 2016, the Commission issued a decision (CLI-16-07) in the Indian Point license renewal proceeding, in which it directed the Staff to supplement the Indian Point Severe Accident Mitigation Alternatives (SAMA) analysis with sensitivity analyses. Specifically, the Commission held that documentation was lacking for two inputs (TIMDEC and CDNFRM) used in the MACCS computer analyses, and that uncertainties in those input values could potentially affect the SAMA analysis cost-benefit conclusions. The Commission therefore directed the Staff to perform additional sensitivity analyses.

The two inputs (TIMDEC and CDNFRM) are commonly used in the SAMA analyses performed for license renewal applications (LRAs). These two input values were generally based on the values provided in NUREG 1150, Severe Accident Risks: An Assessment for Five U.S. Nuclear Power Plants and NUREG/CR-3673, Economic Risks of Nuclear Power Reactor Accidents.

The TIMDEC input value defines the time required for completing decontamination to a specified degree. The CDNFRM input parameter defines the cost (on a per person basis) of decontaminating non-farmland by a specified decontamination factor. The CDNFRM values used in NUREG-1150 ($3,000/person for decontamination factor of 3 and $8,000/person for decontamination factor of 15) stem from decontamination cost estimates provided in NUREG/CR-3673, the same 1984 economic risk study referenced in support of the decontamination time inputs. These decontamination cost inputs are commonly escalated to account for inflation.

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.

This request for additional information was discussed with Nancy Ranek, 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 301-415-1263 or e-mail William.Ford@nrc.gov.

Discussion:

The applicants representatives indicated they had a clear understanding of the question. They understood the need for the RAI and that it was driven by a recent decision by the Commission.

They also understood they were being asked to 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. The applicant believes that they can respond to this RAI within the requested 30 day time period.

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JUNE 27, 2016 BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION CO., LLC, CONCERNING A DRAFT REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE LASALLE COUNTY STATION, LICENSE RENEWAL APPLICATION (TAC. NOS. MF5347 & MF5346)

DISTRIBUTION:

HARD COPY:

DLR RF E-MAIL:

PUBLIC RIdsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource RidsNrrDlrRsrg Resource RidsNrrPMLasalle Resource RidsOpaMail RidsOgcMail J. Mitchell R. Plasse W. Ford J. Danna J. Wachutka, OGC D. McIntyre, OPA M. Kunowski, RIII V. Mitlyng, RIII P. Chandrathil, RIII H. Logaras, RIII C. Lipa, RIII S. Sheldon, RII R. Ruiz, RIII J. Robbins, RIII