Using the advanced summarizer, I got this -

On March 9th America’s government awarded a trio of firms $39.7m to design “microreactors” that can supply a few megawatts of power to remote military bases, and be moved quickly by road, rail, sea and air. The idea of small reactors is as old as nuclear power itself.

In July 1951, five months before a reactor in Idaho became the first in the world to produce usable electricity through fission, America began building USS Nautilus, a nuclear-powered submarine.

A report by the army in 2018 said that Holos, a prototype mobile nuclear reactor, would be 62% cheaper than using liquid fuel.

NASA is developing smaller “Kilopower” reactors for space missions, designed to power small lunar outposts.