In defiance of international sanctions on nuclear program and amid European criticism, bill also calls for operating metal uranium production plant

Milestone brings site closer to reopening and producing heavy water, a key ingredient in the production of plutonium, which fuels nuclear weapons

Tehran informed IAEA its heavy water production surpassed 130 metric tons allowed by 2015 accord with world powers

In leaked report, IAEA says Tehran informed it this week that its stock of heavy water had exceeded 130 metric tons

State Dept.: Iran's move will 'deepen its political, economic isolation'; Tehran brags of heavy water sales contravening sanctions; bans cooperation with outlawed UK cultural body

Assistant to head of Iranian atomic energy program claims country produces 20 tons of heavy water a year, is self-sufficient in designing and producing centrifuges

Amid mounting Gulf tensions, Tehran set to announce resumption of ‘limitless’ uranium enrichment at shuttered Arak heavy water reactor

Tehran boosts production of low-enriched uranium and heavy water, inspectors say they still have unrestricted access to the sites

Official from country's atomic agency says move part of 60-day ultimatum laid down by President Rouhani for negotiating new terms