Interesting. My only question is, what is a high powdered refrigeration unit? You mentioned high powdered twice so I assume it isn't a typo.
As for being in the desert is no problem, refrigeration relies on a temperature gradient or difference so that there is matter of a lower temperature to have the excess heat transferred to. This is usually the atmosphere. Put a reactor in the desert and it will have a harder time staying within temperature limits than if you put it in Alaska.
I also ponder how putting fissionable material all over the World could possible go wrong. The smallest speck of plutonium kills anyone who ingests it. Reactors exploded by the folks that expect to have virgins at their happy place in the sky might see them as targets.
I think the idea of modular reactors is superb, but I see the dangers and difficulties will make the technology unlikely to go mainstream for the non-military part of society.
Good article though. I hope the world wakes up to the need for cleaner energy before we don't have a world to live in.