Arak heavy water reactor
"Iran is being accused of illicitly stepping up purchases for its heavy water reactor, which if completed will produce enough plutonium for several nuclear weapons a year, UN diplomats said Tuesday. The allegation against Iran by an unnamed country, if true, would suggest that Tehran is rejecting the U.S. reconfiguration into a light-water reactor. The accusation was contained in a report to the Security Council sanctions committee prepared by experts monitoring sanctions against Iran..."