Six world powers will help Iran redesign its Arak heavy water reactor so that it cannot produce weapons-grade plutonium, Reuters reported Saturday, citing a document released by the Iranian state news agency IRNA.

According to the news agency, the document was signed separately on November 13, 17 and 18 by the foreign ministers of Iran and the P5+1 (the United States, Britain, France, China and Russia plus Germany) as well as EU foreign policy chief Federica Mogherini. It became effective on the date it was signed by all states.


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