ML23249A135

Summary of Partially Closed Public Meeting with Oklo, Inc., to Discuss Materials for the Oklo Advanced Reactor Design

ML23249A135
Person / Time
Site:	99902095
Issue date:	01/16/2024
From:	David Williams Office of Nuclear Reactor Regulation
To:	Jessup W Office of Nuclear Reactor Regulation
References
EPID L-2022-LRM-0042
Download: ML23249A135 (1)

Text

January 16, 2024 MEMORANDUM TO:

William Jessup, Chief Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-power Production and Utilization Facilities Office of Nuclear Reactor Regulation FROM:

Donna Williams, Senior Project Manager /RA/

Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-power Production and Utilization Facilities Office of Nuclear Reactor Regulation

SUMMARY

OF THE AUGUST 9, 2023, PARTIALLY CLOSED PUBLIC MEETING WITH OKLO, INC. TO DISCUSS MATERIALS FOR THE OKLO ADVANCED REACTOR DESIGN (EPID NO. L-2022-LRM-0042)

Meeting Information:

Applicant: Oklo, Inc. (Oklo)

Project No.: 99902095 Public Meeting Notice Agencywide Documents Access and Management System (ADAMS)

Accession No.: ML23193A986 Applicant Presentation Slides: ML23226A135 Meeting Attendees: See Enclosure 1 for a list of meeting attendees.

CONTACT: Donna Williams, NRR/DANU/UAL1 301-415-1322

W. Jessup 2

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). Highlights from the meeting included the following:

The NRC staff met with Oklo to discuss its approach to vessel design and the regulatory approach for its advanced reactors.

Oklo previously met with the NRC staff on June 29, 2023, to present its approach to materials and to address specific areas of interest previously highlighted by NRC staff regarding this topical area. During the June 29, 2023, meeting, the NRC staff requested more information regarding Oklo's intentions for the design, analysis, procurement, and proposed codes and standards that would be used for its vessels.

The purpose of the August 9, 2023, meeting was to communicate Oklos approach to design, analysis, and construction of the reactor vessel and guard vessel and to solicit feedback from the NRC staff on Oklos intended path forward for compliance with consensus codes and standards for the reactor vessel and guard vessel.

As a result of the meeting, the NRC staff has a better understanding of Oklos proposed approach for procurement of its vessels and how Oklo intends to use codes and standards for design and construction of the reactor and guard vessel.

The NRC staff noted that in Regulatory Guide 1.87 Acceptability of ASME Code Section III, Division 5, High Temperature Reactors,' the NRC endorsed codes and standards for use in the design, construction, testing and quality assurance of mechanical systems and components for non-light-water reactors operating at elevated temperatures.

The NRC staff also noted that when an applicant does not plan to use consensus codes and standards, and those that have been previously endorsed by the NRC, the applicant has to justify the adequacy of such a code or standard. Further, this type of custom review represents an application review risk and can be resource intensive.

No regulatory decisions were made as a result of this meeting.

Enclosures:

1. List of Attendees

2. Meeting Notes (proprietary) cc: Oklo Powerhouse via GovDelivery to this letter contain proprietary information. When separated from Enclosure 2, this letter is DECONTROLLED.

Package: ML23249A130 Letter: ML23249A135 : ML23249A136 NRR-106 OFFICE NRR/DANU/UAL1: PM NRR/DANU/UAL1: BC NRR/DANU/UAL1: PM NAME DWilliams WJessup DWilliams DATE 09/06/2023 1/16/24 1/16/24 List of Meeting Attendees For the Partially Closed August 9, 2023, Pre-Application Meeting with Oklo, Inc. to Discuss Materials Name Organization Donna Williams U.S. Nuclear Regulatory Commission (NRC)

Candace DeMessieres NRC Meg Audrain NRC Matthew Gordon NRC Alex Siwy NRC Trace Orf Oklo, Inc. (Oklo)

Ross Moore Oklo Tom Burke Oklo (contractor)

Pat Everett Oklo Amrit Patel Oklo Alex Renner Oklo William Stokes Oklo Scott Auerbach Oklo