[deftnerd]

Civilian uses? Perhaps not, but Iran has always wanted to have a respected navy. Compact nuclear reactors like the type used in submarines with nuclear reactors for their power production require 90%+ enriched uranium. That's one very plausible use of HEU that isn't just "they want to build a bomb".

[7e]

A submarine is a good place to hide a breeder reactor. Far from any detectors.

[giardini]

deftnerd says>Iran has always wanted to have a respected navy.<

They couldn't find enough men who could swim!