Granted, I don't know what this specific article says because I refuse to run Javascript that I don't absolutely need to, but most nuclear reactors also need at least slightly enriched uranium. The older-gen CANDU reactors currently running in Ontario are a rare exception to that, and get around it by using heavy water (deuterium oxide) rather than normal water as a moderator. I'm not aware of any more recent reactor designs that make use of heavy water, and I expect there's a reason for that. So new reactors mean enriched uranium.

It's a double-edged sword that makes it very difficult to prove that any given uranium enrichment facility is military in purpose.