Pakistan and Irak centrifuges There is some interesting information on centrifuge types in an 15 years old Atomic Scientist article The article mentions Ultra Centrifuge Nederland UCN CNOR machines 2 separative work units SNOR 5 separative work units Urenco consortium G 1 centrifuge between 2 and 3 separative work units per year G 2 5 to 6 separative work units It is believed that most of Pakistan s centrifuges are based on the G 2 design