Iranian President Ahmadinejad today ordered the Atomic Energy Organization of Iran (AEOI) to start work to produce nuclear fuel to a purity of 20 percent for the Tehran nuclear research reactor. According to Iranian Mehr news agency, he however, said that Iran is still ready for exchange of nuclear fuel. Iranian president while ordering AEOI chief Ali Akbar Salehi to start the production of enrichment also said that Iran is ready to negotiate for exchange of fuel.