TEHRAN, April 23 (Xinhua) -- The recent change in the method of 60-percent uranium enrichment in Iran's Natanz nuclear facility is a "technical decision," which the International Atomic Energy Agency was informed of, Kazem Gharibabadi, Iran's ambassador to the international organizations in Vienna, said on Friday.
"There is no need for odd speculations. Change in the mode of 60-percent enrichment is a technical decision," Gharibabadi tweeted.
In the new mode, two IR-6 and IR-4 cascades of centrifuges are coupled, and two different products of 60 percent and 20 percent are accumulated, the Iranian envoy explained.
"Enrichment operation became more efficient," he noted.
On April 16, the Atomic Energy Organization of Iran announced the start of producing uranium enriched at a 60-percent purity after a blackout struck the country's central Natanz enrichment facility.
