Role in Prometheus

Founding Tier 1 partner: Xe-100 HTGR and TRISO-X fuel designs serve as the program's primary technical platform for integrating frontier AI into design, licensing, manufacturing, construction, semi-autonomous operation and fuel fabrication workflows.

Commitments

Tier	Tier 1 industry partner
Category	Reactor developer
Board seat	Yes
Capital committed	$10M
In-kind	Proprietary Xe-100 HTGR design and TRISO-X fuel fabrication data
Ticker	XE

Assets brought to the program

Xe-100 SMR
TRISO-X fuel
APEX multi-agent platform (internal)

Workstreams

Notes

Holds seats on the consortium's Governance and Science Boards; expects to leverage Prometheus results across its 11 GW commercial pipeline (Dow, Amazon, Centrica).

Milestone log

2026-07-22 — Announced as founding Tier 1 partner: $10M private capital, board of directors representation, Xe-100/TRISO-X as technical platform (source)
2026-09-16 — INL's Industry Partnership Consortium Overview publishes the Tier 1 terms X-energy holds: $10M investment for one voting board seat plus a full-participation advisory seat, royalty-free license to surrogate models/agentic workflows/proprietary tools, and 6-month early access to the proprietary enhancement layer including source code (source)