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Fissile material
A nuclide that is capable of undergoing fission after capturing low-energy thermal (slow) neutrons. Although sometimes used as a synonym for fissionable material, this term has acquired its more-restrictive interpretation with the limitation that the nuclide must be fissionable by thermal 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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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Energy
- Category: Nuclear energy
- Company: U.S. NRC
- Product:
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