DOE Advanced Reactor Demonstration Program

LICENSING · LONG MOTT GENERATING STATIONNRC environmental review complete (no significant impact)

Seadrift, TX

FUNDING · COMPANY ROUNDCompany round: X-energy IPO (Nasdaq: XE)$1.0B

Closed · Company-level IPO proceeds

PROJECT · KEMMERER UNIT 1 (NATRIUM)Nuclear construction begins

Kemmerer, WY

LICENSING · KEMMERER UNIT 1 (NATRIUM)NRC construction permit

Kemmerer, WY

FUNDING · COMPANY ROUNDCompany round: TerraPower investors (Gates, SK, KHNP and others)$650M

Closed · Company raise; private capital since 2022 above $2.2B

NRC · LONG MOTT GENERATING STATIONConstruction permit under review

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.

FUNDING · HERMESGrant: DOE Advanced Reactor Demonstration Program (risk reduction)$303M

Awarded · Up to $303M cost share

FUNDING · KEMMERER UNIT 1 (NATRIUM)Grant: DOE Advanced Reactor Demonstration Program$2.0B

Awarded · Up to $2B federal cost share, matched 50/50 by private funds

FUNDING · LONG MOTT GENERATING STATIONGrant: DOE Advanced Reactor Demonstration Program$1.2B

Awarded · ARDP cost share for X-energy's first Xe-100 plant (amount approximate)