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uranium    音标拼音: [jɚ'eniəm]
n. 铀

铀

uranium
n 1: a heavy toxic silvery-white radioactive metallic element;
occurs in many isotopes; used for nuclear fuels and nuclear
weapons [synonym: {uranium}, {U}, {atomic number 92}]

Uranium \U*ra"ni*um\, n. [NL., from Uranus the planet. See
{Uranus}.] (Chem.)
An element of the chromium group, found in certain rare
minerals, as pitchblende, uranite, etc., and reduced as a
heavy, hard, nickel-white metal which is quite permanent. Its
yellow oxide is used to impart to glass a delicate
greenish-yellow tint which is accompanied by a strong
fluorescence, and its black oxide is used as a pigment in
porcelain painting. Symbol U. Atomic weight 239.
[1913 Webster]

Note: Uranium was discovered in the state of an oxide by
Klaproth in 1789, and so named in honor of Herschel's
discovery of the planet Uranus in 1781.
[1913 Webster] Uran-ocher


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  • What is Uranium? | IAEA
    Uranium is a vital component for the production of nuclear fuel, which is used in nuclear power reactors all over the world (Image: A Vargas IAEA) Uranium is a naturally occurring radioactive element, which has the atomic number of 92 and corresponds to the chemical symbol U in the periodic table
  • Qu’est-ce que l’uranium ? | AIEA
    L’uranium est un élément radioactif naturel avec le symbole chimique U et le numéro atomique 92, appartenant aux actinides
  • Production d’uranium pour les réacteurs nucléaires | AIEA
    L’uranium est le principal combustible utilisé dans les réacteurs nucléaires Il doit être géré correctement, de façon sûre et durable Ces derniers temps, la production annuelle mondiale d’uranium naturel était comprise entre 55 000 et 65 000 tonnes d’uranium métal, soit l’équivalent de la demande en combustible nucléaire Le thorium, qui pourrait constituer une source
  • Depleted Uranium | IAEA
    Uranium (chemical symbol U) is a naturally occurring radioactive element In its pure form it is a silver-coloured heavy metal, similar to lead, cadmium and tungsten Like tungsten it is very dense, about 19 grams per cubic centimetre, 70% more dense than lead It is so dense a small 10-centimetre
  • What is Nuclear Energy? The Science of Nuclear Power | IAEA
    What is nuclear fission? Nuclear fission is a reaction where the nucleus of an atom splits into two or more smaller nuclei, while releasing energy For instance, when hit by a neutron, the nucleus of an atom of uranium-235 splits into two smaller nuclei, for example a barium nucleus and a krypton nucleus and two or three neutrons
  • Uranium production for nuclear reactors | IAEA
    Uranium is the primary fuel for nuclear reactors and must be managed properly, in a safe and sustainable manner Recent annual production of natural uranium world-wide has been between 55,000 and 65,000 tons of uranium metal, similar to the fuel demand Additionally, thorium is also being investigated as a potential alternate source of nuclear fuel
  • Depleted uranium: sources, exposure and health effects
    Information is given on sources of depleted uranium exposure, the likely routes of acute and chronic intake, the potential health risks from both the radiological and chemical toxicity standpoints and future research needs Several ways of uptake of compounds with widely different solubility characteristics are also considered
  • Sufficient Uranium Resources Exist, However Investments Needed to . . .
    Sufficient uranium resources exist to support both the continued use of nuclear power and its significant growth through 2050 and beyond However, timely investments in new exploration, mining operations and processing techniques will be essential to ensure that uranium becomes available to the market when needed
  • Uranium: From Exploration to Remediation | IAEA
    If countries opt for nuclear power or decide to explore the possibility of producing uranium, the IAEA's job is to help them do so safely, securely and sustainably Through its advisory services, missions and expert advice, the IAEA helps national authorities to ensure that uranium, throughout its
  • Les ressources en uranium mondiales sont suffisantes pour répondre à la . . .
    Les ressources d’uranium décrites dans le Livre rouge suffisent amplement pour répondre à la demande d’uranium, tant dans la projection haute que basse, jusqu’en 2040 et au-delà





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