Quote:
Originally Posted by TrevorW
This element's reactivity makes it ideally suited to making fuel for nuclear power plants, reactors which power submarines, and of course nuclear weapons.
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Hmm..
Uranium's chemical reactivity has nothing to do with it's use as a nuclear fuel.
Also it must be noted that only isotope suitable as fission material is U235.
U238 (most abundant isotope) is used in rounds, because it is heavy (so penetrates well into other materials), and because it is chemically reactive (basically it burns (oxidises) violently (especially at higher temperatures and when in aerosol mode after bursting through shield) so it serves as a kind of explosive charge.