Most are run by universities and use low-enriched uranium rather than highly enriched uranium.
But the fact that the company was handling highly enriched uranium was never widely publicized.
We learned that Ukraine completed the removal of highly enriched uranium from its territory.
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It is almost certain that the country is working with highly enriched uranium (HEU) technology.
Some are getting rid of their stocks of highly enriched uranium or plutonium, both used in bombs.
With regard to the latter, the bill actually would encumber highly enriched uranium production as well as plutonium.
"There is a debate inside the intelligence community about the extent" of North Korea's highly enriched uranium program, she said.
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North Korea's two previous tests involved plutonium devices, but it is also believed to have a highly enriched uranium programme.
Such machines could cut by as much as a third the time Iran would need to produce highly enriched uranium.
The strike will have to occur before the mullahs enrich sufficient quantities of highly enriched uranium to produce nuclear bombs.
Part of the enthusiasm reflects the anticipated expiration of the Highly Enriched Uranium agreement between Russia and the U.S., in 2013.
Was it a plutonium bomb, like the ones it tested in 2006 and 2009, or one that used highly enriched uranium?
Acquiring nuclear weapons requires three elements: fissile material (such as highly enriched uranium, HEU, or plutonium), a delivery system and a warhead.
Canada agreed to give up a significant quantity of highly enriched uranium.
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But the country in 2010 publicly revealed its effort to develop highly enriched uranium, another material that can trigger a nuclear explosion.
And by the way, the breach on the agreement was not through plutonium, the breach on the agreement is highly enriched uranium.
"A highly enriched uranium test would be a significant development, " he said.
P-1 centrifuges, configured to produce highly enriched uranium rather than the civilian sort, to produce enough fissile material for a bomb a year.
Tehran announced in July that it had resumed making the centrifuges needed to produce highly enriched uranium, a key ingredient for nuclear bombs.
Belarus has agreed to eliminate all its stocks of highly enriched uranium by the time of the next nuclear security summit in 2012.
The HEU Agreements allow for the downblending of highly enriched uranium derived from nuclear weapons to low enriched uranium for peaceful commercial purposes.
His argument rested on evidence that Iraq is still seeking the one missing piece needed to build a nuclear weapon: highly enriched uranium.
The isotope, known as a medical tracer, is made outside the United States by a complicated process requiring highly enriched uranium from nuclear reactors.
We have offered to provide Ukraine with technical and financial assistance in ensuring the safe transfer and ultimate disposition of their highly enriched uranium.
Yet this year and next Iran will make substantial progress in figuring out how to configure and operate its centrifuges, the machines that produce highly enriched uranium.
Caught cheating itself last year, Iran blamed its suppliers for traces of bomb-usable highly enriched uranium found by IAEA inspectors on its secretly imported centrifuge machines.
Mr ElBaradei singled out for particular concern Iran's failure to declare that it was researching advanced centrifuge designs, known as P2, capable of producing highly enriched uranium.
But a test using highly enriched uranium, which is cheaper and easier to produce, would raise the threat that North Korea can expand its nuclear arsenal quickly.
But past violations and unexplained traces of (potentially militarily useful) highly enriched uranium suggest that Iran is using the cover of electricity generation to acquire nuclear-weapons capability.
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For about 10 years, we had been encouraging Ukraine to either ship out its highly enriched uranium or transform it to a lower-grade -- a lower-enriched uranium.
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