The presidents of the United States and Russia have reacted positively to the outcome of the second round of talks between Iran and the West in Vienna, the Kremlin says.

According to a statement by the seat of the Russian government on Saturday, during a telephone conversation, US president Barack Obama and Russian President Dmitry Medvedev had "shared a positive reaction to the outcome of consultations in Vienna between Russian, American, French and Iranian experts."

A proposal, requiring Iran to export its low-enriched uranium to Russia for further refinement, was drafted earlier in the week after delegates from Iran, France, Russia and the United States as well as experts from the UN nuclear watchdog gathered in Vienna.

According to the plan, proposed by the International Atomic Energy Agency (IAEA), Iran's uranium would then be sent to France for fabrication into fuel assemblies that can be used in the Tehran research reactor.

IAEA Director-General Mohamed ElBaradei, on Wednesday, sent a draft nuclear agreement to the governments of Iran, Russia, the United States and France.

The Tehran research reactor, which supplies medical isotopes for treating cancer to more than 200 hospitals in Iran, requires uranium enriched up to 20 percent.

Iranian officials say they prefer buying nuclear fuel for the research reactor under the supervision of the UN nuclear watchdog, rather than shipping uranium abroad.

Iran's envoy to the UN nuclear watchdog, Ali-Asghar Soltaniyeh, said on Friday that the country would nevertheless respond to the offer next week.

"Iran is working and elaborating on all details of this (IAEA) proposal from technical aspects and all other dimensions." Soltaniyeh, told Press TV.

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