About Epithermal

A Team That Builds Reactors Others Can't.

Career reactor and space-nuclear engineers behind first-of-a-kind designs, across DOE national labs, DoW, and NASA.

Who We Are

Reactor Engineering, in One Shop

We serve government agencies and private companies alike. Epithermal Power LLC is based in Los Alamos, New Mexico, and our team brings backgrounds from DOE, DoW, and NASA: a deep bench built inside the nation's actual reactor programs.

Why Us

We're Not Reactor Tourists

Micro- and space-reactors are our craft, not a trend

Real reactors : designed and built for the nation, not slideware
Deep, not broad : decades inside the actual U.S. micro- and space-reactor programs
In the room : when the government needs a reactor designed, our team is at the table

10+

Reactor Designs in Portfolio

Mission Classes, One Platform

25+

First-of-a-Kind Designs

15+

Active R&D Programs

CRISP

Integrated 4D Platform

Track Record

We've Already Done the Hard Part.

Delivered across several federal agencies.

Program Record

From Design to Test

DOE · DoW · NASA

Space-Reactor Demonstration Programs

DOE · DoW · NASA

Critical Reactor Experiments

DOE · DoW · NASA

Space Power & Propulsion Designs

DOE · DoW · NASA

End-to-End Reactor Multiphysics

Let's Build the Reactors That Power Earth and Space.

Partner with a team that has designed, built, and tested real reactors.

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