ML23256A282

June 30, 2023, Summary of the Partially Closed Public Meeting with Oklo to Discuss Probabilistic Risk Assessment for the Oklo Advanced Reactor Design

ML23256A282
Person / Time
Site:	99902095
Issue date:	01/17/2024
From:	David Williams Office of Nuclear Reactor Regulation
To:	Jessup W Office of Nuclear Reactor Regulation
References
EPID L-2022-LRM-0042
Download: ML23256A282 (1)

Text

MEMORANDUM TO:

FROM:

SUBJECT:

January 17, 2024 William Jessup, Chief Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-power Production and Utilization Facilities Office of Nuclear Reactor Regulation 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 JUNE 30, 2023, PARTIALLY CLOSED PUBLIC MEETING WITH OKLO TO DISCUSS PROBABILISTIC RISK ASSESSMENT FOR THE OKLO ADVANCED REACTOR DESIGN (EPID 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.: ML23164A132 Applicant Presentation Slides: ML23186A080 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:

Oklo shared the following goals for the June 30, 2023, meeting:

o Describe Oklos use of probabilistic risk assessment (PRA),

o Solicit feedback on the intended development timelines for Oklos PRA model, and o

Discuss the relationship between NRCs PRA requirements and policy to Oklos use of PRA.

This meeting was part of a broader meeting with Oklo on several technical and programmatic topic related to its ongoing preapplication engagement activities supporting its advanced reactor design.

Oklo stated that PRA will be used to inform deterministic analysis scope, identify severe accident vulnerabilities, and support risk-informed design and operations.

Oklo stated that it does not anticipate requesting exemptions to any regulations related to the use of PRA.

The NRC staff provided feedback to Oklo on the PRA scope that Oklo is planning for the application phase.

The NRC staff discussed with Oklo the definition of a full scope PRA, as used in consensus standards stating that it includes a Level 1, Level 2, and Level 3 PRA. During the discussion, the NRC staff noted that the development of a custom definition of a full scope PRA is a departure from consensus standards, represents an application review risk, and could result in a more resource-intensive review of an application.

Oklo indicated that it did not intend to pursue further pre-application engagement on this topic. The next planned interaction on this topic will be during the readiness assessment.

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 w/o enclosure 2 to this letter contains proprietary information. When separated from Enclosure 2, this letter is DECONTROLLED.

Package: ML23256A280 Letter: ML23256A282 : ML23256A283 NRR-106 OFFICE NRR/DANU/UAL1: PM NRR/DANU/UAL1: BC NRR/DANU/UAL1: PM NAME DWilliams WJessup DWilliams DATE 09/13/2023 1/17/24 1/17/24

List of Meeting Attendees

SUMMARY

OF THE JUNE 30, 2023, PARTIALLY CLOSED PUBLIC MEETING WITH OKLO TO DISCUSS PROBABILISTIC RISK ASSESSMENT FOR THE OKLO ADVANCED REACTOR DESIGN (EPID L-2022-LRM-0042)

Name Organization Donna Williams U.S. Nuclear Regulatory Commission (NRC)

Reed Anzalone NRC Hanh Phan NRC Candace de Messieres NRC Jason Schaperow NRC Andrew Proffitt NRC Trace Orf Oklo, Inc. (Oklo)

Ross Moore Oklo Pat Everett Oklo Alan Smith Oklo Alex Renner Oklo Kellen McCaroll Oklo