Abundant energy from Earth to the asteroid belt.

Abundant energy from Earth to the asteroid belt.

Abundant energy from Earth to the asteroid belt.

Fission microreactors to enable strategic energy for critical mission capabilities on Earth, in space, and underwater.

R1 Microreactor

Purpose-designed modular power for defense-critical assets

100kWe - 1MWe for 4-6 years

ENGINEERING

Simple design optimized for reliability, uptime, and manufacturability

Simple design optimized for reliability, uptime, and manufacturability

Simple design optimized for reliability, uptime, and manufacturability

Capabilities

Vertically integrated supply chain

Vertically integrated supply chain

Vertically integrated supply chain

Special Purpose Reactors

We design and manufacture modular, transportable reactors for strategic energy applications on Earth and in space.

Special Purpose Reactors

We design and manufacture modular, transportable reactors for strategic energy applications on Earth and in space.

Special Purpose Reactors

We design and manufacture modular, transportable reactors for strategic energy applications on Earth and in space.

Heat Pipes & Thermal Management

Our expertise includes developing high-temperature heat pipes and radiators for compact thermal management.

Thermal Management

Our expertise includes developing high-temperature heat pipes and radiators for compact thermal management.

Thermal Management

Our expertise includes developing high-temperature heat pipes and radiators for compact thermal management.

Control Systems

Our team excels in design, build, and test of automated control systems, enabling hardware-in-the-loop digital twins.

Control Systems

Our team excels in design, build, and test of automated control systems, enabling hardware-in-the-loop digital twins.

Control Systems

Our team excels in design, build, and test of automated control systems, enabling hardware-in-the-loop digital twins.

Graphite Machining

We precision machine nuclear-grade graphite in house which accelerates our design iteration speed and feedback loop.

Graphite Machining

We precision machine nuclear-grade graphite in house which accelerates our design iteration speed and feedback loop.

Graphite Machining

We precision machine nuclear-grade graphite in house which accelerates our design iteration speed and feedback loop.

Roadmap to Full Power

Roadmap to Full Power

Roadmap to Full Power

2025

In 2025, we accomplished critical design and safety milestones including our Conceptual Design Review (CDR) and Nuclear Safety Design Agreement (NDSA). We also made significant strides in our hardware development, opening our 145,000 sq-ft facility in Torrance, CA to accelerate in-house manufacturing. We tested our first Electrically-Heated Demonstration Unit (EDU), began preparing our test facility, and initiated fabrication of our TRISO fuel that will support multiple reactor demonstrations.

2026

In 2026, we will conduct our first reactor demonstration under the Department of Energy’s Reactor Pilot Program which will validate our controls behavior, reactor physics properties, and safety features. We will complete our Preliminary Design Review (PDR) and Preliminary Documented Safety Analysis (PDSA), along with finishing qualification campaigns for a majority of our subsystems including the core, heat exchanger, and power conversion system.

2027

In 2027, we will manufacture, assemble, and turn on a full-power, electricity-producing advanced reactor on American soil. We will have completed all remaining design, operations, and safety reviews in partnership with Idaho National Laboratory, Department of Energy, and others. We will evaluate our reactor performance and validate our system design ahead of producing additional demonstration and customer units in 2028 and beyond.

2025

In 2025, we accomplished critical design and safety milestones including our Conceptual Design Review (CDR) and Nuclear Safety Design Agreement (NDSA). We also made significant strides in our hardware development, opening our 145,000 sq-ft facility in Torrance, CA to accelerate in-house manufacturing. We tested our first Electrically-Heated Demonstration Unit (EDU), began preparing our test facility, and initiated fabrication of our TRISO fuel that will support multiple reactor demonstrations.

2026

In 2026, we will conduct our first reactor demonstration under the Department of Energy’s Reactor Pilot Program which will validate our controls behavior, reactor physics properties, and safety features. We will complete our Preliminary Design Review (PDR) and Preliminary Documented Safety Analysis (PDSA), along with finishing qualification campaigns for a majority of our subsystems including the core, heat exchanger, and power conversion system.

2027

In 2027, we will manufacture, assemble, and turn on a full-power, electricity-producing advanced reactor on American soil. We will have completed all remaining design, operations, and safety reviews in partnership with Idaho National Laboratory, Department of Energy, and others. We will evaluate our reactor performance and validate our system design ahead of producing additional demonstration and customer units in 2028 and beyond.

2025

In 2025, we accomplished critical design and safety milestones including our Conceptual Design Review (CDR) and Nuclear Safety Design Agreement (NDSA). We also made significant strides in our hardware development, opening our 145,000 sq-ft facility in Torrance, CA to accelerate in-house manufacturing. We tested our first Electrically-Heated Demonstration Unit (EDU), began preparing our test facility, and initiated fabrication of our TRISO fuel that will support multiple reactor demonstrations.

2026

In 2026, we will conduct our first reactor demonstration under the Department of Energy’s Reactor Pilot Program which will validate our controls behavior, reactor physics properties, and safety features. We will complete our Preliminary Design Review (PDR) and Preliminary Documented Safety Analysis (PDSA), along with finishing qualification campaigns for a majority of our subsystems including the core, heat exchanger, and power conversion system.

© Antares Nuclear, Inc. 2025

© Antares Nuclear, Inc. 2025

© Antares Nuclear, Inc. 2025