Russian site AtomInfo.ru reports that Russia began regular shipments of molybdenum-99 to Iran in April. The isotope for Iran is produced by the Obninsk branch of the Karpov Scientific Research Institute of Physical Chemistry (NIFKhI), which also produces Mo-99 for the Russian domestic market and since May 2010 - for Poland.
NIFKhI operates a VVR-ts research reactor that uses uranium with enrichment of up to 36% in its fuel.
UPDATE: It is expected that the volume of isotope supply will eventually reach 100 Ci of Mo-99 and 115 Ci of I-131 a week.