Located at the Tehran Nuclear Research Center; according to Iranian authorities, between June 1987 and February 1999 gram quantities of UO2 that had been irradiated at the Tehran Research Reactor (TRR) were sent to the MIX Facility for separation of I-131, a short lived radioisotope; separation took place in a lead-shielded cell; according to Iranian officials, the material produced through these experiments was transferred to a waste disposal site at Anarak; according to Iranian authorities, a small amount of imported UO2 in pellets was used to test the chemical processes of the MIX Facility; the material, including the resulting waste, was presented to the International Atomic Energy Agency (IAEA) at the Jabr Ibn Hayan Multipurpose Laboratories (JHL).