Comment by jjk166

If the bad actor has centrifuge technology and access to low enriched uranium, they are already weeks away from achieving weapons grade material. If a country with Iran's enrichment capabilities had a sufficient LEU stockpile swapped for an equivalent amount of HALEU, it would shave about 7 days off the time necessary to produce a bomb's worth of weapons grade uranium.

For nations with enrichment capabilities, enrichment is not a major contributor to overall breakout time. Enrichment doesn't take much time, it's building enrichment facilities that takes a while, especially clandestinely.