Tracker · Pre-application

X-Energy, LLC (XENITH)

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.

Who: Not stated
Design: XENITH
Reactor type: High Temperature Gas Reactors
Status: Active on the NRC index
What: Not stated
When: Not stated
Site: Not stated on the NRC page in this snapshot.
NRC page reviewed: Tuesday, September 15, 2026

Dockets

99902118

Status timeline

Dates are printed as the NRC page prints them, including the actual (A) or target (T) mark.

The NRC page in this snapshot does not list a milestone table.

NRC activity table

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	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

Related Federal Register notices

Included when a notice shares a docket printed on the NRC page, or when the notice title repeats the project or design name. Other NRC notices are left out.

No in-scope Federal Register notice is linked to this project.

NRC project page