TEHRAN (AFP/Reuters) - Iran will enter Vienna talks with the major powers on Monday seeking a guaranteed supply of 20 percent enriched uranium and insisting it will make up any shortfall by domestic production, officials say. Officials from Iran, the International Atomic Energy Agency, France, Russia and the United States will meet in Vienna to discuss how to provide the 20 percent enriched uranium needed for a research reactor in the capital Tehran. Iranian media say the talks could run on into Tuesday. At the Vienna meeting, Iran will seek a guaranteed supply of 20 percent enriched uranium according to a tight timetable, said Mohammad Reza Mohammad Karimi, associate editor of the English-language Iran Daily newspaper. Iran will go for concrete agreements. If there are no unforeseen hurdles, then the meeting is expected to yield good results. Iranian officials have said Tehran is entering the Vienna talks in a strong position as it could manufacture nuclear fuel on its own if it wanted to. They have warned that if the talks fail, Iran will not hesitate to enrich the uranium itself to the 20 percent purity level required for the Tehran reactor which produces isotopes for medical use. Abolfazl Zohrehvand, aide to lead nuclear negotiator Saeed Jalili, said Iran has the ability to enrich uranium up to 20 percent and may want to achieve 63 percent enrichment, the official IRNA news agency reported. The current proposal is for enrichment to be done on our territory while only enrichment above five percent, in particular for the research reactor in Tehran, will be done in another country, the news agency quoted him as saying. An Iranian nuclear official, who declined to be named, told AFP Tehran will discuss the modalities of procuring this fuel on Monday. Meanwhile, the UN nuclear agencys head was quoted as saying on Saturday that the direct talks without preconditions between the United States and Iran are the only solution to the conflict over Tehrans nuclear program. New sanctions against Iran would only aggravate the dispute rather than push it to give in to international demands, Mohamed ElBaradei, Director General of the International Atomic Energy Agency, told Austrian daily Die Presse. Of course you can impose further sanctions. But I consider it rather unlikely that new sanctions will make Iran come around, ElBaradei said in an interview to be published on Sunday. President Barack Obama has understood that talks with Iran are the only possible solution, the Nobel Peace laureate said. If you want to make progress, you have to start talks without preconditions.