Iran's chief nuclear negotiator said today, 30th April, that Iran may resume some nuclear fuel activities after it failed to reach an agreement with the EU over the future of its controversial nuclear program. Hassan Rowhani said, it was "unlikely" that Iran would resume actual uranium enrichment at the Natanz facility, but that "some activities" may resume at the facility at Isfahan. A definitive decision on whether to resume work would be taken next week. He added: Uranium enrichment, that is what has been done in Natanz [nuclear plant], it is not likely that Iran will start enriching uranium, but some activities might be resumed." The Isfahan facility is designed to convert raw uranium into gas which can then be enriched at Natanz. Enriched uranium can be used as fuel for nuclear power reactors, but also to make atomic bombs. Last November Iran agreed to freeze activities at Natanz and Isfahan, but has repeatedly said the suspension is temporary and voluntary. Three EU nations -- Britain, Germany and France are trying to persuade Iran to end its enrichment program but talks on Friday in London failed to produce an agreement.