ML23072A475

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Summary of the February 23, 2023, Closed Meeting with Terrapower, LLC, to Discuss the Partial Flow Blockage for the Natrium Design
ML23072A475
Person / Time
Site: 99902100
Issue date: 05/17/2023
From: Mallecia Sutton
NRC/NRR/DANU/UAL1
To: Jessup W
NRC/NRR/DANU/UAL1
Banks C
References
EPID L-2021-LRM-0071
Download: ML23072A475 (4)


Text

MEMORANDUM TO:

Joseph A. Proffitt, Acting Chief Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation FROM:

Mallecia Sutton, Senior Project Manager Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation

SUBJECT:

SUMMARY

OF THE FEBRUARY 23, 2023, CLOSED PRE-APPLICATION MEETING WITH TERRAPOWER, LLC, TO DISCUSS THE PARTIAL FLOW BLOCKAGE FOR THE NATRIUM DESIGN (EPID NO. L-2021-LRM-0071)

Meeting Information:

Applicant: TerraPower, LLC (TerraPower)

Docket/Project No.(s): 99902100 EPID: L-2021-LRM-0071 Meeting Date: February 23, 2023 Meeting Type: Closed Public Meeting Notice Agencywide Documents Access and Management System (ADAMS)

Accession No.: ML23030A040 Applicant Presentation Slides ADAMS Accession No.: ML23040A164 Meeting Attendees: See enclosure for list of meeting attendees.

CONTACT: Mallecia A. Sutton, NRR/DANU 301-415-0673 May 17, 2023 Signed by Sutton, Mallec on 05/17/23

J. Proffitt Meeting Summary:

The U.S. Nuclear Regulatory Commission (NRC) staff conducted the meeting in accordance with NRC Management Directive 3.5, Attendance at NRC Staff-Sponsored Meetings (ML21180A271). The main points of discussion during the meeting included:

On February 23, 2023, the NRC staff held a closed meeting with TerraPower to discuss the Partial Flow Blockage Methodology for the Natrium design. Participants included representatives from TerraPower, General Electric Hitachi, Bechtel, and the Department of Energy. The enclosure provides the list of meeting attendees.

The NRC staff began the public meeting with introductions and explained that the meeting was closed due to proprietary information. During the meeting, TerraPower representatives discussed credible and non-credible types of blockages. TerraPower provided a partial flow blockage experimental data overview, Phenomena Identification and Ranking Table, and the partial flow blockage methodology evaluation model for the Natrium design.

TerraPower representatives and the NRC staff discussed the next steps for future interactions regarding the Natrium Reactor design.

Project No: 99902100

Enclosure:

List of Meeting Attendees

J. Proffitt

SUBJECT:

SUMMARY

OF FEBRUARY 23, 2023, CLOSED PRE-APPLICATION MEETING WITH TERRAPOWER, LLC, TO DISCUSS THE PARTIAL FLOW BLOCKAGE FOR THE NATRIUM DESIGN (EPID NO. [L-2021-LRM-0071]) DATED: MAY 17, 2023 DISTRIBUTION:

PUBLIC RidsNrrDanuUal1 Resource RidsNrrDanuUal2 Resource RidsNrrDanu Resource MSutton, NRR JProffitt, NRR ADAMS Accession Number: ML23072A475 NRC-001 OFFICE NRR/DANU/UAL1/PM NRR/DANU/UAL1/PM NRR/DANU/UAL1/LA NRR/DANU/UAL1/BC NAME CBanks MSutton DGreene JProffitt DATE 3/20/2023 4/19/2023 5/16/2023 5/17/2023 OFFICE NRR/DANU/UAL1/PM NAME MSutton DATE 5/17/2023 OFFICIAL RECORD COPY

Enclosure List of Meeting Attendees Closed Pre-Application Meeting with TerraPower, LLC, to Discuss the Partial Flow Blockage for the Natrium Design February 23, 2023 Name Organization Mallecia Sutton U.S. Nuclear Regulatory Commission (NRC)

Courtney Banks NRC Andrew Bielen NRC Candance de Messieres NRC Michael Spencer NRC Reed Anzalone NRC Tarek Zaki NRC Jason Thompson NRC Ian Gifford TerraPower LLC (TerraPower)

Brian Johnson TerraPower Cole Blakely TerraPower Emily Young TerraPower Hugh Luo TerraPower Jaehyok Lim TerraPower Joonhyung Choi TerraPower Marc Hotchkiss TerraPower Matthew Presson TerraPower Michael Montecalvo TerraPower Mine Yilmaz TerraPower Moonkyu Hwang TerraPower Nick Kellenberger TerraPower Robert Petroski TerraPower Samuel Miller TerraPower Tara Neider TerraPower George Wilson TerraPower Mathieu Martin TerraPower Richard Schultz TerraPower Tim Guidotti TerraPower Sterling Harper TerraPower Selim Kuran TerraPower Dustin Langewisch TerraPower Young-Min Kwon TerraPower Tim Enfinger General Electric Hitachi Steve Kline Bechtel Nathan Howard Department of Energy (DOE)

Timothy Stuhldreher DOE