Enrichment to the 90 percent threshold provides the fissile material that detonates nuclear weapons.
After talks with Iran and three world powers, ElBaradei drafted a plan for Iran to transfer most of its low-enriched uranium to Russia and France to turn it into fuel for a Tehran reactor that makes isotopes for cancer treatment.
Russia, France and the US, which would help modernize the reactor’s safety equipment and instrumentation under the deal, see it as a way to reduce Iran’s LEU stockpile below the threshold needed to produce material for a bomb.



