The Mark-0 reactor is the first of several advanced nuclear reactors in the DOE's pilot reactor program expected to achieve criticality by July 4.

Antares Achieves Initial Criticality of a Privately Developed Advanced Reactor Under DOE Pilot Program

NEW YORK: A nuclear start-up working on mini-reactors for the United States military has announced a crucial first step in producing a model that could be deployed at bases and…

The first privately developed U.S. nuclear reactor in over 40 years achieves criticality, marking a historic milestone for energy innovation.

The Mark-0 reactor is the first of several advanced nuclear reactors in the DOE's pilot reactor program expected to achieve criticality by July 4.

A nuclear reactor was actually built in the USs ahead of schedule; unimaginable in modern times...

The Energy Department says a small nuclear reactor under development at a national lab has reached a crucial milestone that could allow it to produce electricity in the next few…