TheTechno Optimist.

HALEU TRISO fuel productionStandard Nuclear—Standard Nuclear lists on the NYSE as STDN after a downsized $150 million IPOHALEU TRISO fuel productionStandard Nuclear—Standard Nuclear starts producing HALEU TRISO fuel and raises a $140 million Series AHALEU TRISO fuel productionStandard Nuclear—Oklo and Standard Nuclear sign an MOU to turn recycled reactor material into TRISO fuel

Standard Nuclear

TRISO fuel, HALEU, Oak Ridge Tennessee

USpublicest. 2024Checked 11 Oct

The brief

Analyst view
  • Describes itself as the only independent US maker of TRISO fuel; reactor-agnostic, also radioisotope power for space and defense.
  • Making HALEU TRISO fuel since Jan 2026 for Radiant's Kaleidos microreactor; ~500 kg/yr line, expanding past 2 t/yr.
  • Raised $140M Series A (Jan 2026) and $150M in a July 2026 NYSE IPO; backlog up to $245M.

Technical approach

As reported
TRISO

Fuel that carries its own containment

Tiny uranium kernels sealed in layers of carbon and silicon carbide ceramic that hold fission products in, even at high temperature.

Reactor-agnostic

One line, many reactor makers

Sells fuel to several microreactor and SMR developers instead of tying the factory to one design.

Hub and spoke

Make in Tennessee, assemble in Idaho

Fuel is made at Oak Ridge and finally assembled at a site in Idaho Falls near Idaho National Laboratory.

Primer