Antares Nuclear

← DOE PILOT

ANTARES NUCLEAR

FOUNDED

2022

TBD

TYPE

Private

Also tracked in: DOE PILOT

Signal Indicators

FUNDING STRENGTHMEDIUM

DOE Reactor Pilot cost-share · private

COMMERCIAL TRACTIONLOW

Pre-commercial — no public customer yet

REGULATORY MOMENTUMHIGH

PDSA approved · DOE conditional HALEU commitment

SUPPLY CHAIN READINESSMEDIUM

DOE conditional HALEU commitment · Aug 2025

Signal indicators reflect Corium editorial assessment based on public data. Not investment advice.

LOADING MARKET DATA…

DOE REACTOR PILOT CIRCUIT

PDSA APPROVED — DOE PILOT

▶ HOLDING POSITIONLast activity: date unknown

Last verified: April 2026 · Source: NRC ADAMS / Press Release · Scoring methodology ℹ

Recent Activity

No recent activity on record

Company Profile

Antares Nuclear is developing the Mark-0 microreactor under the DOE Reactor Pilot Program, targeting zero-power criticality at Idaho National Laboratory by July 4, 2026. The company secured a DOE conditional commitment for HALEU fuel supply in August 2025 — a critical milestone validating their fuel pathway. Antares has completed PDSA (Preliminary Design Safety Approval), clearing the path toward construction at INL. The Mark-0 is designed for compact, deployable nuclear power at the 10 MWe scale.

Reactor Specs

REACTOR DESIGN

Mark-0 · Nuclear Microreactor

Uses tbd as coolant instead of water. Operates at higher temperature for greater thermal efficiency.

POWER OUTPUT

10 MWe

Powers ~8,130 average US homes. A standard large nuclear plant produces ~1,000 MWe.

COOLANT

TBD

Specialized coolant selected for this reactor design's thermal and safety profile.

FUEL TYPE

HALEU

High-Assay Low-Enriched Uranium. More energetic than standard fuel but requires dedicated US enrichment capacity not yet fully built out.

TARGET OPERATION

2026

US nuclear projects historically require 7–10 years from construction permit to first power. The 2026 target assumes factory-built modular components and no major regulatory delays.

SITE LOCATION

Idaho National Laboratory, ID

Adjacent to Idaho National Laboratory — the DOE's primary nuclear energy research facility. Site has hosted test reactors since the 1950s.

Licensing Milestone Tracker

PRE-APPLICATION

APPLICATION

—

UNDER REVIEW

—

RAI RESOLVED

—

DESIGN CERTIFIED