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Uranium-235 - Wikipedia
https://en.m.wikipedia.org/wiki/Uranium-235
WebUranium-235 (235 U or U-235) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction. It is the only fissile isotope that exists in nature as a primordial nuclide. Uranium-235 has a half-life of 703.8 million years.
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Uranium-235 (U-235) | Definition, Uses, Half-Life, & Facts
https://www.britannica.com/science/uranium-235
Weburanium-235 (U-235), radioactive isotope of the element uranium with a nucleus containing 92 protons and 143 neutrons. Uranium-235 is the only naturally occurring fissile material; that is, the uranium-235 nucleus undergoes nuclear fission when it collides with a slow neutron (a neutron with a kinetic energy less than 1 electron volt ).
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What is Uranium? | IAEA - International Atomic Energy Agency
https://www.iaea.org/newscenter/news/what-is-uranium
WebAug 16, 2023 · There are three natural isotopes of uranium — uranium-234 (U-234), uranium-235 (U-235) and uranium-238 (U-238). U-238 is the most common one, accounting for around 99 per cent of natural uranium found on earth.
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What is Uranium? How Does it Work - World Nuclear Association
https://www.world-nuclear.org/information-library/nuclear-fuel-cycle/introduction/what-is-uranium-how-does-it-work.aspx
WebNatural uranium as found in the Earth's crust is a mixture largely of two isotopes: uranium-238 (U-238), accounting for 99.3% and uranium-235 (U-235) about 0.7%. The isotope U-235 is important because under certain conditions it can …
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Nuclear Fuel Facts: Uranium | Department of Energy
https://www.energy.gov/ne/nuclear-fuel-facts-uranium
WebNov 15, 2016 · Low Enriched Uranium – contains a 235 U concentration between 0.711 percent and 20 percent. Most commercial reactor fuel uses low enriched uranium (LEU) enriched to between 3 percent and 5 percent 235 U. Uranium between 3 and 5 percent 235 U is sometimes referred to as “reactor-grade uranium.”
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Uranium - Wikipedia
https://en.m.wikipedia.org/wiki/Uranium
WebUranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the low abundance of uranium-235 in natural uranium (which is, overwhelmingly, mostly uranium-238), uranium needs to undergo enrichment so that enough uranium-235
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The Fission Process | MIT Nuclear Reactor Laboratory
https://nrl.mit.edu/reactor/fission-process
WebThe arrangement of particles within uranium-235 is somewhat unstable and the nucleus can disintegrate if it is excited by an outside source. When a U-235 nucleus absorbs an extra neutron, it quickly breaks into two parts. This process is …
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CDC Radiation Emergencies | Radioisotope Brief: Uranium-235 (U-235…
https://www.cdc.gov/nceh/radiation/emergencies/isotopes/uranium.htm
WebDepleted uranium (uranium containing mostly U-238) can be used for radiation shielding or as projectiles in armor-piercing weapons. Where does it come from? U-235 and U-238 occur naturally in nearly all rock, soil, and water. U-238 is the most abundant form in …
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Uranium-235 - isotopic data and properties
https://chemlin.org/isotope/uranium-235
WebActinouranium Symbol: 235 U or 235 92 U Mass number A: 235 (= number of nucleons) Atomic number Z: 92 (= number of protons) Neutrons N: 143 Isotopic mass: 235.04393(2) u (atomic weight of Uranium-235) Nuclide mass: 234.9934673 u (calculated nuclear mass without electrons) Mass excess: 40.92053 MeV Mass defect: 1.915055932 u (per nucleus ...
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Fissile material | Uranium-235, Plutonium-239 & Nuclear Reactors
https://www.britannica.com/technology/fissile-material
Weburanium-235. fissile material, in nuclear physics, any species of atomic nucleus that can undergo the fission reaction. The principal fissile materials are uranium-235 (0.7 percent of naturally occurring uranium), plutonium-239, and uranium-233, the last two being artificially produced from the fertile materials uranium-238 and thorium-232 ...
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