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XENITH

artist rendering of X-Energy XENITH reactor design

Project Overview

The U.S. Nuclear Regulatory Commission (NRC) is currently engaged in preapplication activities with X Energy, LLC. (X-energy), starting in November 2023. X-energy is a Rockville, MD company designing the X-Energy Next-Generation Integrated Transportable High-Temperature (XENITHTM) Microreactor Plant – Point Design, which is a high temperature gas cooled reactor. The XENITHTM design is between 3 to 10 MWe.

For more information, please see the XENITH pre-application documents (NRC Docket 99902118)

To subscribe to the X-energy XENITHTM email service, select “X-Energy XENITH” from the Advanced Reactors list after entering your email into the GovDelivery system.

Pre-Application Activities

Product Type Reference Status
XENITHTM Micro-Reactor 2023 Pre‑Application Regulatory Engagement Plan Regulatory Engagement Plan ML23317A095 No review requested
May 1, 2024, Public Meeting Slides Presentation ML24108A117 No review requested
Principal Design Criteria Topical Report ML24117A263 (Rev 1)
ML24351A229 (Rev 2)		 Under Review
Analytical Methods Topical Report ML24194A130 Under Review
Concept of Operations White Paper ML24229A071 Feedback provided
(ML24305A218)
XENITHTM Micro-Reactor 2024 Pre‑Application Regulatory Engagement Plan Regulatory Engagement Plan ML25010A374 No review requested
Transportation and Logistics White Paper ML25022A317 Under Review

Page Last Reviewed/Updated Tuesday, February 18, 2025