LOADING…
LOADING…
X-energy · Seadrift, TX · Texas
Four Xe-100 high-temperature gas reactors (80 MW each) with TRISO fuel; first grid-scale advanced reactor at an industrial site in North America. NRC environmental review finished early (May 2026); construction permit pending.
Power
320 MW
Fission · First commercial
Storage
—
energy capacity
Online
—
not announced
Capital committed
$1.2B
closed or awarded
Capital pending
—
conditional or under review
How it works
Fuel is packed in tough ceramic-coated particles (TRISO), often in billiard-ball pebbles, and cooled by helium gas. Runs much hotter than water reactors, which suits industrial heat.
OPEN IN 3D →Others on this approach
Construction permit under review
applied Mar 31, 2025
The NRC completed its environmental assessment with a finding of no significant impact on May 18, 2026, and released the Final Safety Evaluation Report on October 30, 2026, concluding the site and plant provide a basis to begin construction. The construction permit decision is still listed as TBD, and the NRC's project page does not show a date for it.
NEXT: Commission construction permit decision following the final safety evaluation; Dow has said it expects a decision by end of 2026 (not NRC-confirmed). A separate operating license application would be needed before fuel loading and startup.
Grant $1.2B
Sources: ans.org · corporate.dow.com
Dow (Seadrift Operations)
Power and high-temperature steam for Dow's chemical plant
STEP 4/6 · AT RISK HALEU is the bottleneckMost advanced designs need HALEU (5–20% enriched), with no commercial US supply at scale yet.
STEP 5/6 · AT RISK Advanced reactor timelinesFuel availability becomes a gating item for first units.
STEP 4/5 · WATCH Advanced nuclear gets anchor customersBuyers fund development and commit to output from first units.
STEP 4/4 · WATCH Office relaunched as Energy Dominance FinancingLending shifts toward nuclear and utility expansions (AP1000 offers, Constellation uprates).
Critical inputs
Policy that applies