ML22118A360
| ML22118A360 | |
| Person / Time | |
|---|---|
| Site: | 99902071 |
| Issue date: | 05/16/2022 |
| From: | William Kennedy NRC/NRR/DANU/UARL |
| To: | Vechioli L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML22118A361 | List: |
| References | |
| Download: ML22118A360 (4) | |
Text
W. Kenned UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 MEMORANDUM TO:
William B. Kennedy, Acting Chief Advanced Reactor Licensing Branch Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation FROM:
Lucieann Vechioli, Project Manager Advanced Reactor Licensing Branch Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF THE FEBRUARY 16, 2022, PUBLIC MEETING BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION STAFF AND X ENERGY LLC REGARDING THE XE-100 APPROACH TO PLANT CONTROL AND PROTECTION On February 16, 2022, the U.S. Nuclear Regulatory Commission (NRC) staff held a partially-closed public meeting with representatives from X Energy LLC (X-energy). The purpose of the meeting was for X-energy to communicate the Xe-100 plant control and protection approach to the NRC staff and get initial feedback before submitting the Xe-100 licensing application. The meeting notice can be located at Agencywide Documents Access and Management System (ADAMS) Accession No. ML22021B650 and the presentation slides for the open session of the meeting at ADAMS Accession No. ML22049A041. The Enclosure provides the list of meeting attendees.
The meeting began with an overview of the Xe-100 design and its required safety functions.
The design of the Xe-100 plant follows a system engineering approach and the risk-informed performance-based methodology from NEI 18-04, Risk-Informed Performance-Based Technology Inclusive Guidance for Non-Light Water Reactors, in developing the design and licensing bases. X-energy plans to submit a white paper related to this topic in the near future.
The discussion was followed by a presentation by X-energy staff about the major instrumentation and control (I&C) systems and their functionality. X-energy stated that the Xe-100 design will comprise four major I&C systems that will be integrated, but function independently: 1) Distributed Control System, 2) Investment Protection System, 3) Post Event Monitoring System, and 4) Reactor Protection System. The white paper will summarize the philosophy and strategy developed for the maintenance of the Xe-100 reactor. The methodology was developed by X-energy and the Electric Power Research Institute (EPRI).
The time and personnel requirements were assessed CONTACT: Lucieann Vechioli, NRR/DANU 301-415-6035 May 16, 2022 Signed by Vechioli, Lucieann on 05/16/22
W. Kennedy 2
through the use of the EPRI Preventive Maintenance Basis Database, EPRI Member experience, and EPRI Subject Matter Experts. X-energy pointed out that the information provided in the white paper is preliminary and subject to change as the design progresses.
X-energy stated that it will revise and submit other reports as more information becomes available.
The open session of the meeting ended with the question and answer portion. During the meeting, the NRC staff provided their initial feedback of the presentation. One of the comments provided by the NRC staff was the interest in particular for the Post Event Monitoring System which X-energy has preliminarily classified as non-safety related. The NRC staff stated that it would like to learn more about X-energys criteria and rationale for the classification.
Subsequently, X-energy representatives and the NRC staff continued with the closed session of the meeting to go over more technical details related to the I&C systems that involved proprietary information. The specific date of when X-energy plans to submit to the NRC the white paper related to this topic was not provided at the meeting.
Project No. 99902071
Enclosure:
List of Attendees
Package ML22118A361 NRC-001 OFFICE NRR/DANU/UAL1L/PM NRR/DANU/UAL1/LA NRR/DANU/UAL1/BC (A)
NRR/DANU/UAL1/PM NAME LVechioli DGreene WKennedy LVechioli DATE 4/28/2022 4/29/2022 5/13/2022 5/16/2022
Enclosure List of Attendees Public Meeting between the U.S. Nuclear Regulatory Commission staff and X Energy LLC Wednesday, February 16, 2022 Name Organization Ian Jung U.S. Nuclear Regulatory Commission (NRC)
William Kennedy NRC Justin Vazquez NRC Michael Orenak NRC Lucieann Vechioli NRC Brian Tindell NRC Eric Oesterle NRC Joseph Sebrosky NRC Boyce Travis NRC Ismael Garcia NRC Dinesh Taneja NRC Joseph Ascraft NRC Brian Green NRC Travis Chapman X Energy LLC (X-energy)
Ingrid Nordby X-energy Chris Crefeld X-energy Shawn Hanvy X-energy Gregg Crannick X-energy Brandon Hartle X-energy Jason Pottorfr X-energy Yvotte Brits X-energy Matt Hertel X-energy Jeff Csuy X-energy Tom Braudt X-energy Roy Lindengren X-energy Ian Davis X-energy Alan Campbell X-energy Chip Moon X-energy Jana Bergman Curtiss and Wright Maury Pressburger Sargent & Lundy Ian Gifford Terrapower William Catullo Member of the public