So the mod is fine and I'm not objecting to it, but there is no real-world process to turn U-238 into U-235. Kovarex named the technology after himself as a way of being clear that it doesn't exist, and he added it for gameplay purposes.

Turning U-238 into something useful is called a "breeder reactor" but it makes Plutonium, not U-235. "Uranium enrichment" is a real term, but it means what the game already calls "uranium processing".

Hi morsk, thanks for your comment.
I actually didn't quite get, that enrichment was included in "processing" already, up until now. I see your point.
The idea was rather simple - it is done in cylinders, more U235 comes out, than comes in, hence enrichment.

For fun part, story of the mod is this. Factorio inspired me to learn about uranium in real life, couldn't find a d**n thing related named kovarex, got confused.

Anyway, I didn't mean to offend kovarex's creativity.
Cheers :)