Latest milestone
NRC environmental review concluded with an environmental assessment and finding of no significant impact.
2026-05 · NRC Long Mott dashboard
Open primary source ↗← All deployments
Long Mott · Xe-100
A four-module industrial energy project designed to supply electricity and process heat at Dow's Seadrift site.
Lead company · X-energy →
Program · ARDP demonstration
License reviewMedium confidence
Deployment stage3 / 8Development
Deployment trajectory
1Interest
2Preliminary
3Development
4Contractual
5Ready
6Physical
7Operational
8Replication
Next milestone
Complete the safety review and obtain a construction permit; operation requires a later license.
- Responsible
- NRC and Long Mott Energy
- Key blocker
- Construction-permit decision and TRISO fuel scale-up
GenerationGen IV
ScaleSMR
Reactor familyHTGR
RoleDemonstration power
Capacity4 × 80 MWe + process heat
Reporting basisVerified