Iran planning to upgrade centrifuges at Natanz

Iran has sent a letter to the IAEA informing it that it plans to use more modern, faster centrifuges to enrich uranium (but 'only' to 5%) at its Natanz facility outside Tehran.

The letter said that Iran would use the new
centrifuges - a model called IR2m - at a unit in the Natanz plant where Iran is
enriching uranium to a fissile concentration of up to five percent, according to
an IAEA