ML23256A277

August 8, 2023, Summary of the Meeting to Discuss Safety Classification and Instrumentation and Controls the Reactor Trip System for the Oklo Aurora X Design

ML23256A277
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: ML23256A277 (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 8, 2023, PARTIALLY CLOSED PUBLIC MEETING WITH OKLO TO DISCUSS SAFETY CLASSIFICATION, INSTRUMENTATION AND CONTROLS, AND THE REACTOR TRIP SYSTEM 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.: ML23193A986 Applicant Presentation Slides: ML23226A133 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 staff discussed Oklos safety classification approach previously in meetings with Oklo on June 27 and July 31, 2023. The purpose of the August 8 meeting was to provide a recap of the case study which evaluated a single bounding event, loss of heat sink, and describe how Oklo applied the classification process to functions and features affecting shutdown.

Oklo shared the following goals for the August 8, 2023, meeting:

o Familiarize the non-core safety team staff with the Aurora X, its instrumentation and control (I&C) systems, the overall safety case, and the most recent results of Oklo's safety classification analyses o

Communicate the standards that Oklo is planning to commit to o

Obtain staff feedback to Oklos regulatory approach for I&C o

Determine if further information is needed by the staff regarding I&C before a readiness assessment.

Oklo stated that the design and applied regulatory controls to the reactor trip system are commensurate with the safety significance of the system and they believe that they comply with the intent of 10 CFR 50.55a(h)(3).

The NRC staff indicated that future reviews regarding whether the reactor trip system complies with the relevant regulations (e.g., 10 CFR 50.55a(h)(3)) will depend on how the system is classified.

The NRC staff and Oklo agreed that no further pre-application interactions were necessary on this topic. However, both parties planned to continue discussions on the safety classification of the reactor trip system as part of future discussions regarding safety classification, in general.

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 contains proprietary information. When separated from Enclosure 2, this letter is DECONTROLLED.

Package: ML23256A275 Letter: ML23256A277 : ML23256A278 NRR-106 OFFICE NRR/DANU/UAL1: PM NRR/DANU/UAL1: BC NRR/DANU/UAL1: PM NAME DWilliams WJessup DWilliams DATE 01/09/24 1/16/24 1/16/24 List of Meeting Attendees

SUMMARY

OF THE AUGUST 8, 2023, PARTIALLY CLOSED PUBLIC MEETING WITH OKLO TO DISCUSS SAFETY CLASSIFICATION, INSTRUMENTATION AND CONTROLS, AND THE REACTOR TRIP SYSTEM FOR THE OKLO ADVANCED REACTOR DESIGN (EPID L-2022-LRM-0042)

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

William Jessup NRC Norbert Carte NRC Calvin Cheung NRC Richard Stattel NRC Candace de Messieres NRC Reed Anzalone NRC Dinesh Taneja NRC Alex Siwy NRC Trace Orf Oklo, Inc. (Oklo)

Ross Moore Oklo Pat Everett Oklo Alan Smith Oklo Alex Renner Oklo Amrit Patel Oklo