Latest milestone
DOE reported that Aalo-X completed a zero-power fueled criticality demonstration early on July 4.
2026-07 · DOE fourth-criticality announcement
Open primary source ↗← All deployments
Aalo Critical Test Reactor
A full-scale zero-power core under DOE authorization; it validates reactor physics and systems but does not generate electricity.
Lead company · Aalo Atomics →
Program · Reactor Pilot Program
Initial criticality achievedHigh confidence
Deployment stage7 / 8Operational
Deployment trajectory
1Interest
2Preliminary
3Development
4Contractual
5Ready
6Physical
7Operational
8Replication
Next milestone
Build, license, fuel, and operate the separate 10 MWe Project Ascension reactor before claiming power deployment.
- Responsible
- Aalo Atomics, DOE, and NRC
- Key blocker
- Power-reactor construction, NRC licensing, fuel, and commercial operation
GenerationGen IV
ScaleCritical experiment
Reactor familySFR
RoleCritical experiment
CapacityNo electricity generation
Reporting basisGovernment-reported