ML22063A116

SLRA - Summary of Public Meeting Dated February 17, 2022

ML22063A116
Person / Time
Site:	Oconee
Issue date:	03/08/2022
From:	Angela Wu NRC/NRR/DNRL/NLRP
To:	Snider S Duke Energy Carolinas
Wu A, (301) 415-2995
Shared Package
ML22063A102	List: ML22063A114 ML22063A115 ML22063A116
References
Download: ML22063A116 (4)

Text

March 8, 2022 Mr. Steven M. Snider Site Vice President, Oconee Nuclear Station Duke Energy Carolinas, LLC 7800 Rochester Highway Seneca, SC 29672-0752

SUBJECT:

OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3, SUBSEQUENT LICENSE RENEWAL APPLICATION -

SUMMARY

FOR FEBRUARY 17, 2022 PUBLIC MEETING

Dear Mr. Snider:

By letter dated June 7, 2021 (Agencywide Documents Access and Management System (ADAMS) Package Accession No. ML21158A193), as supplemented by letters dated October 22, 2021 (ADAMS Accession No. ML21295A035), October 28, 2021 (ADAMS Accession No. ML21302A208), November 11, 2021 (ADAMS Accession No. ML21315A012),

December 2, 2021 (ADAMS Accession No. ML21336A001), December 15, 2021 (ADAMS Accession No. ML21349A005), December 17, 2021 (ADAMS Accession No. ML21351A000),

January 7, 2022 (ADAMS Accession No. ML22066A771), January 21, 2022 (ADAMS Accession No. ML22021A000), February 14, 2022 (ADAMS Accession No. ML22066A773), and February 21, 2022 (ADAMS Accession No. ML22052A002), Duke Energy Carolinas, LLC (Duke Energy or the applicant) submitted an application for the subsequent license renewal (SLR) of Renewed Facility Operating License Nos. DPR-38, DPR-47, and DPR-55 for the Oconee Nuclear Station, Units 1, 2, and 3 (ONS) to the U.S. Nuclear Regulatory Commission (NRC). Duke Energy submitted the application pursuant to Title 10 of the Code of Federal Regulations Part 54, Requirements for Renewal of Operating Licenses for Nuclear Power Plants, for SLR.

On February 17, 2022, the U.S. Nuclear Regulatory Commission (NRC, or the staff) held a public meeting with Duke Energy to discuss responses to select requests for additional information (RAIs).

By email dated January 31, 2022 (ADAMS Accession No. ML22035A189), the NRC staff provided discussion topics to Duke Energy. Specifically, the discussion topics pertained to Duke Energys responses to RAIs 4.3.1-1 and 4.3.1-3 (Cycle Projections), and RAI 4.3.3-2 (Metal Fatigue of Non-Class 1 Components), as submitted to the NRC by letter dated January 7, 2022 (ADAMS Accession No. ML22010A129). The slides for the applicants presentation are available at ADAMS Accession No. ML22063A114.

During the applicants presentation, the staff asked clarifying questions. In regards to RAI 4.3.1-1 for TRP 143.9, Cycle Projections, the staff requested confirmation that Transients 3, 4, 5, and 6 are associated with load follow operations and that load follow operations are not performed at ONS. Duke confirmed that was correct. Additionally, Duke Energy stated that heatup and

S. Snider cooldown transient cycles, counted separately, are also logged against Transients 3 and

4. Therefore, Transients 3 and 4 are bounded by ONS startup and shutdown operations and Transients 5 and 6 are not expected to occur.

For RAI 4.3.1-3 for TRP 143.9, Cycle Projections, the staff asked Duke Energy to describe the transients related to the high pressure injection stop-valve-to-check-valve weld and associated transient cycles that were used in the ASME Code Section XI, Appendix L analysis. At the time of the meeting, Duke did not have the information readily available and noted the item to follow up with the NRC staff. By email dated February 23, 2022 (ADAMS Accession No. ML22063A115), Duke Energy provided the information to the NRC staff, indicating that the 60-year design cycles for Transients 8E, 9 and 22A are annualized and that the cycles for the 10-year interval based on the annualized cycles are used in the Appendix L flaw tolerance analysis.

For RAI 4.3.3-2 for TRP 143.2, Metal Fatigue of Non-Class 1 Components, the staff asked Duke Energy to clarify the acceptance criteria regarding the longitudinal stress and thermal expansion stress for the pressurizer sampling line. To this, Duke Energy confirmed that, if the thermal expansion stress exceeds the allowable thermal expansion stress, then the sum of the longitudinal stresses (primary stress plus thermal expansion stress) should not exceed the allowable total longitudinal stress.

If you have any questions, please feel free to contact me at Angela.Wu@nrc.gov.

Sincerely, Signed by Wu, Angela on 03/08/22 Angela Wu, Project Manager License Renewal Projects Branch Division of New and Renewed Licenses Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287

Enclosure:

List of Attendees

S. Snider

SUBJECT:

OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3, SUBSEQUENT LICENSE RENEWAL APPLICATION -

SUMMARY

FOR FEBRUARY 17, 2022 PUBLIC MEETING, DATED: MARCH 8, 2022 DISTRIBUTION E-MAIL:

PUBLIC RidsNrrDnrl Resource RidsNrrPMOconee Resource AWu, NRR/DNRL LGibson, NRR/DNRL LRakovan, NMSS/REFS BSmith, NRR/DNRL BThomson, NRR/DNRL SWilliams, NRR/DORL MMarkley, NRR/DORL MWoods, OGC MWright, OGC JAzeizat, OGC RRichardson, OEDO SBurnell, HQ/OPA LWilkins, OCA DMcIntyre, HQ/OPA DScrenci, RI/OPA DGasperson, RII/OPA JPelchat, RII/FCO ELea, RII/FCO JNadel, RII/DRP JBaptist, RII/DRS Paul.Guill@duke-energy.com Reene.Gambrell@duke-energy.com Arun.Kapur@duke-energy.com ADAMS Accession Number: ML22063A116 Pkg: ML22063A102 OFFICE NRR/DNRL/NLRP/PM NRR/DNRL/NLRP/LA NAME AWu YEdmonds DATE 3/4/2022 3/8/22 OFFICE NRR/DNRL/NLRP/BC NRR/DNRL/NLRP/PM NAME LGibson AWu DATE 3/8/22 3/8/22

List of Attendees All attendees participated remotely.

NRC Attendees:

Lauren Gibson Marieliz Johnson Seung Min Carol Moyer Angela Wu Duke Energy Attendees:

David Peltola Reene Gambrell Daniel William Roberts Chris Saville Paul Guill Rounette Nader Greg Robison Joe Terrell David Morris Ed Asbury Lori Hekking Rita Sipe Mikayla Kreuzberger David Lee Public Attendees:

None Enclosure