Ahmadinejad: Iran expanding nuclear process

EU boycott
The unveiling of new centrifuges at Natanz would be a strong show of defiance toward the United Nations, which has vowed to ratchet up sanctions as long as Iran refuses to suspend enrichment. The Security Council has set a new deadline of late May.

Tensions are also high between Iran and the West following the 13-day detention of 15 British sailors by Iran. The sailors, who were seized by Revolutionary Guards off the Iraqi coast, were released on Wednesday, but since then have said they were put under psychological pressure by their captors to force them to "confess" to being in Iranian waters when captured, angering many in Britain.

Diplomats from developing nations were attending Monday's celebrations at Natanz, but diplomats from European Union boycotted to protest Iran's refusal of the U.N. demands, said the Foreign Ministry in Germany, which currently holds the EU presidency.

Larijani said his country was willing to negotiate with the West and offer assurances that its program is peaceful. But he said the West must accept its nuclear program as a fact.

"We are ready to reach understanding with the Westerners through a corridor of real negotiations — in the current situation, in which Iran's nuclear activities have been concluded," state television quoted Larijani as saying.

"The understanding regards assuring the other party about the peacefulness of Iran's nuclear activities," he said. "But we do not give in our rights."

‘National day of nuclear energy’
Across Iran, school bells rang to mark the "national day of nuclear energy." The government sent out SMS messages of congratulations for the occasion to millions of mobile phone users.

In Tehran, some 200 students formed a human chain at Iran's Atomic Energy Organization while chanting "death to America" and "death to Britain." The students burnt flags of the U.S. and Britain.

On April 9, 2006, Iran announced it had first enriched uranium using an array of 164 centrifuges.

Iran has said its next step is to set up 3,000 centrifuges, but it is not clear where the project stands. Experts say the Natanz plant needs between 50,000 to 60,000 centrifuges to consistently produce fuel for a reactor or build a warhead.

In the enrichment process, uranium gas is pumped into a "cascade" of thousands of centrifuges, which spin the gas at supersonic speeds to purify it. Uranium enriched to a low level, at least 3 percent, can be used as fuel, while at a far higher level, more than 90 percent, it can be used to build a weapon.

Iran currently has two cascades of 164 centrifuges each operating at an aboveground portion of the Natanz facility in central Iran. The two cascades have produced small quantities of non-weapons grade enriched uranium, U.N. nuclear inspectors have said.

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