Aalo-X
In Development
Aalo Atomics
Overview
Aalo's experimental reactor campus at Idaho National Laboratory, built under the DOE Reactor Pilot Program. Its sodium-cooled Critical Test Reactor — a full-scale Aalo-1 core with 13 uranium-dioxide fuel assemblies — reached first criticality on July 4, 2026; the campus's follow-on Project Ascension reactor is intended to generate 10 MWe and power a co-located experimental data center.
Critical Test Reactor achieved criticality July 4, 2026 — the fourth DOE-authorized advanced reactor to meet the Executive Order 14301 deadline — less than eight months after groundbreaking. Project Ascension earthwork is complete and first concrete is underway.