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Spotlight
XENITH
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 | ML25153A711 |
| Probabilistic Risk Assessment | White Paper | ML25093A300 | ML25167A225 |
| XENITHTM Microreactor 2026 Pre Application Regulatory Engagement Plan Revision 3 | Regulatory Engagement Plan | ML26152A236 | No review requested |
Contacts
| Contacts for the X-Energy Xenith Pre-Application Review | |
|---|---|
| Lead Project Manager | Michelle Vega Rodriguez |
| Contact a Public Affairs Officer | |
Page Last Reviewed/Updated Tuesday, September 08, 2026
Page Last Reviewed/Updated Tuesday, September 08, 2026