The United Nations' nuclear watchdog said Wednesday it has confirmed that Iran has begun operating a cascade of advanced centrifuges at an underground site.
International Atomic Energy Agency Director General Rafael Grossi told member delegations on Monday that Iran has “begun feeding a newly installed cascade of 174 IR-4 centrifuges" to enrich uranium hexafluoride gas up to 5% U-235 uranium, the Vienna-based organization said.
The use of the advanced centrifuges in the Natanz facility is another violation of the nuclear deal Iran signed with world powers in 2015, which allows it only to enrich with first-generation IR-1 centrifuges.
The deal was meant to prevent Iran from building a nuclear weapon, which the country insists it does not intend to do. Tehran has said its nuclear program is only for peaceful purposes.