Economy Iran reopens uranium feedstock plant in preparation to boost enrichment Updated : June 27, 2018 11:50 PM IST Under the deal, Iran restricted its enrichment programme to ease concerns it could not be put to developing nuclear weapons and in return won relief from sanctions. Iranian Supreme Leader Ayatollah Ali Khamenei ordered the AEOI this month to start preparations to upgrade enrichment capacity in case the European efforts fail. The UF6 factory, which had been inactive since 2009 due to a lack of yellow cake, is part of the Isfahan uranium conversion facility, according to AEOI's statement on its website. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.