President Mahmoud Ahmadinejad said Saturday that Iran now possesses 6,000 centrifuges, machines used to enrich uranium, the semi-official Fars news agency reported. The new figure is double the 3,000 centrifuges Iran had previously said it was operating in its uranium enrichment plant in Natanz. "Islamic Iran today possesses 6,000 centrifuges," Fars quoted Ahmadinejad as telling university professors in the northeastern city of Mashhad.

In April, Ahmadinejad said Iran had begun installing 6,000 centrifuges at Natanz. His reported comments Saturday provided the first public assertion that Iran has reached that goal.

The announcement is another act of defiance in the face of demands by the United States and other world powers for Iran to halt its enrichment work, which Washington and its allies fear Iran is intent on using to develop weapons.

A report by the U.N.'s nuclear monitoring agency delivered to the Security Council in May said Iran had 3,500 centrifuges, although a senior U.N. official said at the time that Iran's goal of 6,000 machines running by the summer was "pretty much plausible."

Uranium can be used as nuclear reactor fuel or as the core for atomic warheads, depending on the degree of enrichment. Iran says it is interested in enrichment only for its nuclear power program.

The workhorse of Iran's enrichment program is the P-1 centrifuge, which is run in cascades of 164 machines. But Iranian officials confirmed in February that they had started using the IR-2 centrifuge that can churn out enriched uranium at more than double the rate.

A total of 3,000 centrifuges is the commonly accepted figure for a nuclear enrichment program that surpasses the experimental stage and can be used as a platform for a full industrial-scale program that could churn out enough enriched material for dozens of nuclear weapons.

Written By ALI AKBAR DAREINI

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