XENITH is a factory-built, road-transportable microreactor that delivers 3–10 MWe of reliable, long-duration power for mission-critical applications. Using advanced TRISO-X fuel in a helium-cooled High Temperature Gas-cooled Reactor (HTGR), XENITH operates for up to 20 years without refueling and integrates easily with existing infrastructure.

XENITH addresses the need for dependable, long-term power in locations where traditional infrastructure is limited, unreliable, or vulnerable to disruption. Its transportable, modular design makes it suitable for mission-critical operations from military installations to data center to remote communities, providing energy independence without reliance on continuous fuel deliveries.

The XENITH microreactor solution combines proven nuclear technology with innovative engineering for optimal performance, providing:

• Power Output: 3–10 MWe with process heat capability

• Operational Life: 20 years without refueling

• Scalable for increased capacity

• Factory-built and road-transportable

• Integrated shielding and safety systems

• Site footprint under 2 acres

• Complete decommissioning within two years

XENITH incorporates multiple layers of safety through passive safety features that require no human intervention and through robust shielding solutions that ensure safe operation in any environment. When operational life concludes, XENITH's streamlined design enables complete decommissioning within just two years, minimizing long-term commitments while maximizing operational value.

XENITH was refined through Department of Defense programs, including Project Pele and OECIF, to meet these critical defense energy needs. It offers long-duration, secure power that supports black-start capability, base resilience, and mission readiness without dependence on vulnerable fuel supply chains.

XENITH provides long-term, reliable electricity to locations that currently rely on costly or unreliable fuel deliveries. By operating for decades without resupply, it eliminates vulnerability to supply disruptions and ensures continuous service.

Yes, the design was selected by the U.S. Department of Defense to continue into an enhanced engineering phase, focused on achieving preliminary design maturity and initiating pre-licensing engagement with the U.S. Nuclear Regulatory Commission for both military and commercial applications. XENITH can power data centers, mining operations, ports, industrial facilities, and district heating networks, as well as provide shore power for maritime operations. Its versatility supports both grid-connected and off-grid applications.

Each XENITH reactor is designed to operate for 20 years at full output without refueling. When its operational life concludes, decommissioning can be completed within two years.

XENITH conceptual design has been docketed with the U.S. Nuclear Regulatory Commission (NRC). X-energy is engaged in ongoing pre-application activities, including multiple submitted topical reports and a comprehensive Concept of Operations, to ensure compliance with all applicable NRC requirements.