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According to the IAEA, Iran's facilities have produced 189 kilograms of enriched uranium as of August.
The last nuclear warhead was shipped from Ukraine to Russia in 1996 but a significant amount of highly enriched uranium remained in storage at national research institutions.
But enriched uranium can also be used to make the fissile core of nuclear warheads.
We know that it takes about 50 kilograms (110 pounds) of 90 percent enriched uranium to build a gun-type weapon equivalent to the Hiroshima bomb.
Rubin VIENNA, Austria--World powers appeared close to agreement Tuesday on steps to curb Iran's nuclear program, but several Western diplomats said they remain concerned about evidence of highly enriched uranium discovered on equipment at a military site.
Officials said the plan would allow Iran to convert raw uranium into the gas that is spun by centrifuges into enriched uranium.
Stored in an obsolete nuclear reactor outside Tbilisi, the Georgian capital, the highly enriched uranium and spent reactor fuel would give an aspiring nuclear power a significant amount of the material needed to make a nuclear bomb.
Even worse, the production of the stuff that bombs are made of -- highly enriched uranium and plutonium -- continues unabated.
In his trunk is a metal canister, and in the canister are six pounds of highly enriched uranium, which is enough, in the hands of the right terrorists, to build a primitive nuclear weapon.
These decisions were prompted by a sharp decline in the worldwide market for enriched uranium.
Megatons to Megawatts is a 20-year, commercially financed government-industry partnership in which 500 metric tons of Russian weapons-grade uranium is being downblended to low enriched uranium for use as commercial reactor fuel.
Iran has turned all of its enriched uranium closest to the level needed to make nuclear arms into more harmless forms, the UN nuclear agency says.