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- Natural_uranium abstract "Natural uranium (NU, Unat) refers to uranium with the same isotopic ratio as found in nature. It contains 0.711% uranium-235, 99.284% uranium-238, and a trace of uranium-234 by weight (0.0055%). In terms of the amount of radioactivity, approximately 2.2% comes from uranium-235, 48.6% uranium-238, and 49.2% uranium-234.Natural uranium can be used to fuel both low- and high-power reactors. Historically, graphite-moderated reactors and heavy water-moderated reactors have been fueled with natural uranium in the pure metal (U) or uranium dioxide (UO2) ceramic forms. However, experimental fuelings with uranium trioxide (UO3) and triuranium octaoxide, (U3O8) have shown promise.The 0.72% uranium-235 is not sufficient to produce a self-sustaining critical chain reaction in light water reactors or nuclear weapons; these applications must use enriched uranium. Nuclear weapons take a concentration of 90% uranium-235, and light water reactors require a concentration of roughly 3% uranium-235. Unenriched natural uranium is appropriate fuel for a heavy-water reactor, like a CANDU reactor.In rare occasions, earlier in geologic history when uranium-235 was more abundant, uranium ore was found to have naturally engaged in fission, forming natural nuclear fission reactors. Uranium-235 decays at a faster rate (half-life of 700 million years) compared to uranium-238, which decays extremely slowly (half-life of 4.5 billion years). Therefore a billion years ago, there was more than double the uranium-235 compared to now.During the Manhattan Project, the name Tuballoy was used to refer to natural uranium in the refined condition; this term is still in occasional use. Uranium was also called codenamed \"X-Metal\" during World War II. Similarly, enriched uranium was referred to as Oralloy (Oak Ridge alloy), and depleted uranium was referred to as Depletalloy (depleted alloy).".
- Natural_uranium wikiPageExternalLink brat_fuel.htm.
- Natural_uranium wikiPageID "2836053".
- Natural_uranium wikiPageLength "3346".
- Natural_uranium wikiPageOutDegree "32".
- Natural_uranium wikiPageRevisionID "697218330".
- Natural_uranium wikiPageWikiLink CANDU_reactor.
- Natural_uranium wikiPageWikiLink Category:Uranium.
- Natural_uranium wikiPageWikiLink Ceramic.
- Natural_uranium wikiPageWikiLink Chain_reaction.
- Natural_uranium wikiPageWikiLink Depleted_uranium.
- Natural_uranium wikiPageWikiLink Enriched_uranium.
- Natural_uranium wikiPageWikiLink Half-life.
- Natural_uranium wikiPageWikiLink Heavy_water.
- Natural_uranium wikiPageWikiLink Light-water_reactor.
- Natural_uranium wikiPageWikiLink List_of_uranium_projects.
- Natural_uranium wikiPageWikiLink Manhattan_Project.
- Natural_uranium wikiPageWikiLink Natural_abundance.
- Natural_uranium wikiPageWikiLink Natural_nuclear_fission_reactor.
- Natural_uranium wikiPageWikiLink Nuclear_engineering.
- Natural_uranium wikiPageWikiLink Nuclear_fuel_cycle.
- Natural_uranium wikiPageWikiLink Nuclear_graphite.
- Natural_uranium wikiPageWikiLink Nuclear_physics.
- Natural_uranium wikiPageWikiLink Nuclear_reactor.
- Natural_uranium wikiPageWikiLink Nuclear_weapon.
- Natural_uranium wikiPageWikiLink Pressurized_heavy-water_reactor.
- Natural_uranium wikiPageWikiLink Radioactive_decay.
- Natural_uranium wikiPageWikiLink Triuranium_octoxide.
- Natural_uranium wikiPageWikiLink Uranium.
- Natural_uranium wikiPageWikiLink Uranium-234.
- Natural_uranium wikiPageWikiLink Uranium-235.
- Natural_uranium wikiPageWikiLink Uranium-238.
- Natural_uranium wikiPageWikiLink Uranium_dioxide.
- Natural_uranium wikiPageWikiLink Uranium_trioxide.
- Natural_uranium wikiPageWikiLinkText "''x-metal''".
- Natural_uranium wikiPageWikiLinkText "In nature".
- Natural_uranium wikiPageWikiLinkText "NU".
- Natural_uranium wikiPageWikiLinkText "Natural uranium".
- Natural_uranium wikiPageWikiLinkText "natural uranium".
- Natural_uranium wikiPageWikiLinkText "natural".
- Natural_uranium wikiPageWikiLinkText "unenriched uranium".
- Natural_uranium wikiPageWikiLinkText "uranium metal".
- Natural_uranium wikiPageWikiLinkText "uranium".
- Natural_uranium wikiPageUsesTemplate Template:Refimprove.
- Natural_uranium wikiPageUsesTemplate Template:Reflist.
- Natural_uranium subject Category:Uranium.
- Natural_uranium type Actinide.
- Natural_uranium type Element.
- Natural_uranium type Fuel.
- Natural_uranium comment "Natural uranium (NU, Unat) refers to uranium with the same isotopic ratio as found in nature. It contains 0.711% uranium-235, 99.284% uranium-238, and a trace of uranium-234 by weight (0.0055%). In terms of the amount of radioactivity, approximately 2.2% comes from uranium-235, 48.6% uranium-238, and 49.2% uranium-234.Natural uranium can be used to fuel both low- and high-power reactors.".
- Natural_uranium label "Natural uranium".
- Natural_uranium sameAs Q8015337.
- Natural_uranium sameAs Urani_natural.
- Natural_uranium sameAs 天然ウラン.
- Natural_uranium sameAs 천연_우라늄.
- Natural_uranium sameAs m.085tkc.
- Natural_uranium sameAs Q8015337.
- Natural_uranium wasDerivedFrom Natural_uranium?oldid=697218330.
- Natural_uranium isPrimaryTopicOf Natural_uranium.