IR-4

At the pilot plant next door to the main facility, however, Iran was testing the more efficient P-2 centrifuges and a third generation that the Iranians called the IR-4.

Fallout Catherine Collins 2011

At the pilot plant next door to the main facility, however, Iran was testing the more efficient P-2 centrifuges and a third generation that the Iranians called the IR-4.

Fallout Catherine Collins 2011

Just installing the small number of IR-2 centrifuges, and a handful of more advanced models called the IR-4, was something of a victory for Iran in its cat-and-mouse game with the West.

NYT > Home Page By DAVID E. SANGER 2011

A successful deployment of new IR-2M and IR-4 machines could cut this time in half, if not by more, depending on their numbers and efficiency, said these officials.

Iran Claims Progress Speeding Nuclear Program Jay Solomon 2011

This timeline, though, could be significantly shortened if Iran successfully deploys significant numbers of the faster IR-2m and IR-4 machines, U.S. and European officials said.

Iran's Nuclear Experiments Raise Alarm at U.N. Agency Jay Solomon 2011

Iran has announced it is developing a range of more advanced centrifuges to produce nuclear fuel, with names including the IR-2M and the IR-4.

Sanctions Slow Iran's Warhead Capability Jay Solomon 2011

The IAEA report did not discuss the origins of the IR-4, but the centrifuges were based on the third set of designs that Khan had stolen from Urenco decades before.

Fallout Catherine Collins 2011

The IAEA said its inspectors confirmed that newer machines, called the IR-2m and the IR-4, have been installed at Natanz and that some have begun spinning the uranium gas used to produce nuclear fuel.

Iran's Nuclear Experiments Raise Alarm at U.N. Agency Jay Solomon 2011

The IAEA report did not discuss the origins of the IR-4, but the centrifuges were based on the third set of designs that Khan had stolen from Urenco decades before.

Fallout Catherine Collins 2011

January that it was moving forward with plans to phase in hundreds of the sophisticated centrifuges - models dubbed IR-2M and IR-4 - at its main enrichment plant in the city of Natanz.

The Washington Post: National, World & D.C. Area News and Headlines - washingtonpost.com 2011