Fissile Material 1
Fissile Material 1 :
Nuclear Energy and Nuclear Disasters. A nuclide that is capable of undergoing fission after capturing low-energy thermal (slow) neutrons. Although sometimes used as a synonym forfissionable material, this term has acquired its more-restrictive interpretation with the limitation that the nuclide must be fissionable bythermal neutrons. With that interpretation, the three primary fissile materials are uranium-233, uranium-235, and plutonium-239. This definition excludes natural uranium and depleted uranium that have not been irradiated, or have only been irradiated in?thermal reactors
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