Valar Atomics' microreactor clears first critical milestone toward portable power

TL;DR
The Energy Department says Valar Atomics' advanced microreactor has reached the first of two critical milestones on its path to a compact, portable nuclear power source for military and civilian uses.
- Energy Department says advanced nuclear reactor first to reach critical milestone AP News
- Privately developed Mark-Zero reactor goes critical at Idaho National Laboratory, DOE says KBOI
- Small modular nuclear reactor reaches criticality in first test Ars Technica
- US Says Antares’ Small Nuclear Reactor Reaches ‘Criticality’ Bloomberg.com
- First advanced reactor criticality in the US announced at INL East Idaho News
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