Then the Bush administration said it wouldn't accept any verification procedures in any fissile-materials treaty.
Gas centrifuges are used to increase the proportion of fissile uranium-235 atoms within uranium.
First, ending the stalemates on the Fissile Material Cut-off Treaty and the Comprehensive Nuclear Test Ban Treaty.
The going for a fissile-material cut-off treaty at the log-jammed Conference on Disarmament could be harder still.
Although not fissile itself, Th-232 will absorb slow neutrons to produce uranium-233 (U-233)a, which is fissile (and long-lived).
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Fissile material in this form is difficult to use in a weapons program, U.S. and European officials say.
Fissile material in this form is difficult to use in a weapons program, U.S. and European officials said.
Thorium can be used as a nuclear fuel through breeding to fissile uranium-233.
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Then, last week, the administration jumped on an Algerian proposal to accompany fissile-materials negotiations with informal discussions on space and disarmament.
Argentina, Italy and the United Arab Emirates said they were working to install radiation detectors to check cargo for fissile material.
Multicountry negotiations on a fissile-materials ban stalled more than a decade ago.
One reason why many people distrust nuclear power is because they believe it is impossible to separate civil reactors from weapons-grade fissile material.
First, under the Clinton administration, some countries demanded that fissile-materials negotiations include formal talks on nuclear disarmament and a ban on weapons in space.
Critically, the second phase would depend on universal acceptance of a comprehensive verification and enforcement system accompanied by tighter controls on fissile materials produced by civil-nuclear programmes.
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And we recognize that it is not a problem for governments alone to control this fissile material, it requires good regulations and public-private partnerships to get it right.
And, while we do that, we will also continue our efforts to negotiate a ban on the production of fissile materials that can be used in nuclear weapons.
Iran has no current means of weaponizing its fissile materials.
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Their work there was aimed at separating the light, fissile isotope of uranium (useful for making bombs and reactors), from its more abundant, but less useful, heavy cousin.
Crucially, Iraq has lacked fissile material (enriched uranium or plutonium).
Thorium reactors still produce fissile Uranium by transmutation of Thorium.
The anti-gambling coalition has all the stability of fissile uranium.
It did not win backing for new anti-proliferation obligations, such as a legally binding test ban or for an end to the further production of fissile uranium or plutonium for bombs.
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Indeed, the description of this legislation by its advocates as a "fissile materials cutoff, " seems closer to the truth than do their assurances that the bill will not imperil related SNM activities.
And the result is, as you suggested, that India now gets to produce an unlimited amount of fissile material from something called fast breeder reactors, and please don't ask me what that means.
Hence presumably reprocessing is involved in the final stage, since if the protactinium-233 is left in the reactor it will be at least partly converted to protactinium-234, which is not a useful fissile material.
The Obama administration has staunchly opposed allowing countries seeking nuclear-cooperation with the U.S. to engage in enrichment or reprocessing, because either path could be used to create the fissile material required to create an atomic weapon.
CTBT, a readiness to halt the production of fissile materials for bomb-making, restraint in the numbers of warheads and missiles India will deploy, tightened export controls on sensitive technology, and improved relations between India and Pakistan.
We know that completing a treaty that will ban the production of fissile material will not be quick or easy - but the Conference on Disarmament must resume its work on this treaty as soon as possible.
But, in effect, off-shore, outside of Iran, so that this would satisfy the concerns of others like the United States and the Europeans that Iran couldn't secretly use this process to create a stash of what's called fissile material for a nuclear weapon.
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