The head of the Iranian atomic energy agency, Ali Akbar Salehi, has told local television the country will make concessions to the West by exchanging Tehran's low-grade uranium for highly enriched uranium that it needs for its medical research

Salehi said the new proposal for a nuclear deal could involve 60 percent of Iran's low enriched uranium being shipped to the West, all in one batch directly from Iran.

Iran failed to accept a draft nuclear deal by the West last November.

Part of Iran's low-grade stockpile was to have been sent to France and Russia for further enrichment before eventually being sent back to Iran.

Eventually, Iran made a counter-offer calling for the exchange to take place gradually in 400 kilogram batches.

Atomic energy chief Salehi has now said Iran will be willing to deliver the total amount of fuel in one go, on the condition that the exchange take place inside Iran and simultaneously.

Iranian President Mahmoud Ahmadinejad announced in February that Tehran would produce around 20 percent of highly enriched uranium fuel itself.