出典:Wiktionary
出典:『Wiktionary』 (2025/12/08 19:18 UTC 版)
enriched uranium (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/02 12:41 UTC 版)
Enriched uranium is a kind of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. Natural uranium is 99.284% 238U isotope, with 235U only constituting about 0.711% of its weight. 235U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons.