X-energy

Xe-100 high-temperature gas-cooled pebble-bed SMR and TRISO fuel.

Rockville, MD, US · 2009

Small Modular Reactors View on the tracker

Milestone note Aug 13, 2026

DOE adds up to $1B for X-energy's Dow reactor — federal support reaches $2.15B

X-energy said the Department of Energy has notified it of up to $1B in additional Advanced Reactor Demonstration Program funding for the four Xe-100 units planned at Dow's Seadrift complex in Texas, taking federal support since 2021 to as much as $2.15B. The award carries the same 50/50 cost-share, so the money must be matched privately.

X-energy

Press · 2026-08-13 Read

Milestone note Jun 2026

First US reactor cleared via streamlined environmental review

Reached

X-energy / US NRC — The NRC issued a Finding of No Significant Impact for X-energy's plan to build four 80 MWe Xe-100 reactors at Dow's Seadrift site on the Texas Gulf Coast — the first commercial nuclear project in the NRC's 52-year history cleared through a streamlined environmental assessment rather than a full environmental impact statement. The Amazon-backed developer still faces the separate safety review next.

Small Modular Reactors

X-energy

Press · 2026-06 Read