Giant lathes and centrifuges surround our metallic table, and the hum of machinery fills the air.
Natanz. 10.05.51 Music 10.05.54 Paul Kenyon Inside the plan is for fifty thousand centrifuges.
The particles, they said, had come from Pakistan where the centrifuges were first used.
Natanz has nearly 5, 000 working centrifuges, with existing plans to build 54, 000 in all.
Iran had gone from zero centrifuges spinning to thousands, without facing broad pushback from the world.
But they say it remains uncertain whether Pyongyang has actually deployed such P-2 centrifuges effectively.
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Gas centrifuges are used to increase the proportion of fissile uranium-235 atoms within uranium.
Today Iran is enriching uranium in some 3, 000 centrifuges at its nuclear installation in Natanz.
Stuxnet, in part, caused uranium centrifuges to spin out of control, destroying the devices.
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With Iran's current number of operating centrifuges, the batch recycling process would take about two months.
But that's more or less OK, it seems, because only about half these centrifuges are operating.
Iran has also installed upgraded centrifuges in its until recently secret enrichment facility at Qom.
Most U.S. experts think they are intended to serve as rotors in centrifuges used to enrich uranium.
We know ours were put in correctly because we fully tested them on accelerometers and centrifuges before launching.
And crude machines are replacing bare feet as macerators, while washing machines are being used as makeshift centrifuges.
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But the fear is that the same centrifuges could be reconfigured to make high-enriched uranium for nuclear weapons.
For instance, the building housing the centrifuges Hecker saw was vacant in April 2009, when Pyongyang ejected international inspectors.
Thus the dependence on a cascade of centrifuges in the home grown alternative.
Owing to Mr Kahn's client network, Pyongyang had access to advanced centrifuges and sophisticated warhead designs, says Mr Brown.
Mechanical systems like skimmers, centrifuges, and reverse osmosis machines can go a long way towards separating oil from water.
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Iran acknowledges that it is increasing its number of centrifuges to enrich uranium.
It is far more dispersed and protected, and is based on thousands of centrifuges rather than a single nuclear reactor.
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What Stuxnet did was to near randomly slow and then speed up the centrifuges, destroying their bearings in the process.
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Without going into entirely boring detail, the Iranian plan for uranium enrichment depended on a series of high speed centrifuges.
These tubes are controlled by the Nuclear Suppliers Group precisely because they can be used as centrifuges for enriching uranium.
In a separate report, the IAEA says Iran now has about 7, 000 centrifuges - the machines used for enriching uranium.
Iran had, he said, both developed a new centrifuge and increased its enrichment capacity at Natanz from 6, 000 to 9, 000 centrifuges.
Iran's plans to upgrade its uranium enrichment centrifuges would be a "further escalation" in the nuclear stand-off, the US has warned.
Iran had gone from zero centrifuges spinning to several thousand, and the international community was divided about how to move forward.
In any case, though Iran suggests it is racing ahead, the first 3, 000 centrifuges at Natanz have not worked that well.
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