Missions

A nuclear-powered spacecraft in orbit, lit by the sun above the curve of the Earth

Abundant energy for SpaceEarthUnderwater

Special purpose reactors

In 2025, we set the pace for advanced reactor development, completing our Conceptual Design Review (CDR) on an accelerated timeline and becoming the first company in the country to receive an approved Nuclear Safety Design Agreement (NSDA) for a reactor. We opened Antares Prime, 322,000 sq-ft of vertically integrated R&D space, to accelerate in-house manufacturing and iteration, tested our first Electrically Heated Demonstration Unit (EDU), submitted our Preliminary Documented Safety Analysis (PDSA), prepared our reactor test site, and became the first U.S. microreactor to receive a HALEU allocation and begin fuel fabrication.

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    A bundle of heat pipes glowing red-hot above a test vessel
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    A reactor spacecraft in orbit above Earth
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    Deep underwater

R1 Microreactor Purpose-designed modular power for defense-critical assets

The R1 microreactor 3D model · WIP

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Start a mission

Download Specs

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