SMALL MODULAR NUCLEAR REACTOR REACHES CRITICALITY IN FIRST TEST

Summary from the TLDR newsletter

A startup called Antares has successfully achieved criticality in one of its test reactors. Criticality means that the nuclear reaction inside the reactor had become self-sustaining. The system uses a new fuel system that takes some of the complexity and safety out of the reactor design and places them in the fuel design. An attempt to run an entire system that includes electrical generation is expected to happen next year.