Plutonium is attributed to an owner based on an estimate of the fissile content of the irradiated fuel originally supplied, usually on an annual basis.
There is a flourishing black market in fissile materials.
We have shown tremendous willingness to help and, in the past, have provided practical and financial assistance for dealing with fissile materials.
Avoiding leaching from fissile materials is a far more difficult problem to deal with at second hand.
Although that material is probably not in fissile form, it could perhaps be so converted.
How many of us know exactly all the meaning of such terms as "fissile"and"non-fissile" materials, chain reactors, isotope, cyclotrons, and so on?
The output of fissile material is fairly limited and cannot be greatly increased without the construction of new plant, which is a lengthy business.
There is a new method of extraction of energy from very small pellets of fissile matter.
