about the chemical element pp move indef Infobox uraniumUranium IPAc en icon j r e n i m respell ... table , with atomic number 92. It is assigned the chemical symbol U . A uranium atom has 92 proton s and 92 electron s, of which 6 are valence electron s. The uranium nucleus binds between 141 and 146 neutron s, establishing six isotopes U 233 through U 238 , the most common of which are uranium 238 146 neutrons and uranium 235 143 neutrons . All isotopes are unstable and uranium is weakly radioactive decay radioactive . Uranium has the second highest atomic weight of the naturally occurring ..., rock and water, and is commercially uranium mining extracted from uranium bearing mineral s such as uraninite . Natural uranium In nature , uranium is found as uranium 238 99.2742 , uranium 235 0.7204 , and a very small amount of uranium 234 0.0054 . Uranium decays slowly by emitting an alpha particle . The half life of uranium 238 is about 4.47 1000000000 number billion years and that of uranium ... of uranium exploit its unique atomic nucleus nuclear properties. Uranium 235 has the distinction of being the only naturally occurring fissile isotope . Uranium 238 is fissionable by fast neutrons, and is fertile ... reactor . Another fissile isotope, uranium 233 , can be produced from natural thorium and is also important in nuclear technology. While uranium 238 has a small probability for spontaneous fission or even induced fission with fast neutrons, uranium 235 and to a lesser degree uranium 233 have a much ... the fissile material for nuclear weapon s. Depleted uranium sup 238 sup U is used in kinetic energy ... . ref Uranium is used as a colorant in uranium glass , producing orange red to lemon yellow hues ... elements discovery of uranium in the mineral uraninite pitchblende is credited to Martin Heinrich Klaproth ... produced tens of thousands of nuclear weapons that used uranium metal and uranium derived plutonium ... uranium 235 alt A diagram showing a chain transformation of Uranium 235 to Uranium 236 to Barium 141 ... more details
Uranium chloride may refer to Uranium trichloride uranium III chloride , UCl sub 3 sub Uranium tetrachloride uranium IV chloride , UCl sub 4 sub Uranium pentachloride uranium V chloride , UCl sub 5 sub Uranium hexachloride uranium VI chloride , UCl sub 6 sub disambig de Uranchlorid ... more details
saved book title Uranium subtitle An overview cover image HEUraniumC.jpg cover color Uranium An overview Overview Uranium Isotopes Isotopes of uraniumUranium 234 Uranium 235 Uranium 238 Miscellany Enriched uranium Depleted uraniumUranium mining Uranium in the environment Uranium market Uranium lead dating Yellowcake List of countries by uranium reserves Category Wikipedia books on chemical elements Category Uranium Wikipedia books on elements ... more details
Uranium may refer to Uranium , the chemical element Uranium 232 Uranium 233 Uranium 234 Uranium 235 Uranium 238 Uranium 239 Uranium 240 Uranium City, Saskatchewan , a Canadian settlement Uranium TV series Uranium TV series , a music video television series List of uranium mines disambig ca Urani desambiguaci de Uran Begriffskl rung es Uranio desambiguaci n it Uranio disambigua ... more details
Image U,92.jpg thumb Uranium In materials science and materials engineering , uranium metallurgy is the study of the physical and chemical behavior of uranium and its alloy s. Commercial grade uranium can be produced through the Redox reduction of uranium halide s with alkali or alkaline earth metal s. Uranium metal can also be made through electrolysis of potassium K U fluorine F sub 5 sub or UF sub 4 sub , dissolved in a molten Calcium chloride CaCl sub 2 sub and Sodium chloride NaCl . Very pure uranium can be produced through the thermal decomposition of uranium halides on a hot filament. The uranium isotope uranium 235 sup 235 sup U is used as the fuel for nuclear reactor s and nuclear weapon s. It is the only isotope existing in nature to any appreciable extent that is fissile, that is, fissionable by thermal neutrons. The isotope uranium 238 sup 238 sup U is also important because it absorbs neutrons to produce a radioactive isotope that subsequently decays to the isotope 239Pu plutonium , which also is fissile. Uranium in its natural state comprises just 0.71 sup 235 sup U and 99.3 sup 238 sup U, and the main focus of uranium metallurgy is the enriched uranium enrichment of uranium through isotope separation . Sources Uranium Enriched uranium Nuclear weapon design The technology of mining and metallurgy http www.unu.edu unupress unupbooks uu29me uu29me08.htm , retrieved 7 October 2005. See also Nuclear weapon design Enriched materials External links http www.unu.edu unupress unupbooks uu29me uu29me08.htm The technology of mining and metallurgy http legacystory.apps.em.doe.gov text close close2.htm Building nuclear warheads The process http web.ead.anl.gov uranium guide ucompound propertiesu table1.cfm List of Uranium Alloys Category Uranium ... more details
chembox verifiedrevid 413996968 Name Uranium carbide ImageFile NaCl polyhedra.png ImageName Uranium carbide IUPACName Uranium carbide Section1 Chembox Identifiers CASNo Ref cascite correct CAS CASNo 12070 09 6 Section2 Chembox Properties Formula UC MolarMass 250.04 g mol Density 13.63 g cm sup 3 sup MeltingPt 2350 C ref Ma, Benjamin. Nuclear Reactor Materials and Applications . Van Nostrand Reinhold Co, 1983, p. 167. ref Section3 Chembox Structure CrystalStruct Cubic crystal system cubic , Pearson ... Uranium carbide , a carbide of uranium , is a hard refraction metallurgy refractory ceramic material. It comes in several stoichiometric stoichiometries Uranium Carbon sub x sub , such as uranium monocarbide UC , CAS number 12070 09 6 , uranium sesquicarbide U sub 2 sub C sub 3 sub , CAS number ..., 1959, 12 , 159 161. ref and uranium dicarbide UC sub 2 sub , CAS number 12071 33 9 . ref Uranium ..., Acta Crystallographica, 1966, 21 , 670 671. ref Like uranium dioxide and some other uranium compounds, uranium carbide can be used as a nuclear fuel for nuclear reactor s, usually in the form of pellets or tablets. Uranium carbide fuel was used in late designs of nuclear thermal rocket s. Uranium ... uses uranium dioxide instead. As nuclear fuel, uranium carbide can be used either on its own, or mixed with plutonium carbide PuC and Pu sub 2 sub C sub 3 sub . The mixture is also labeled as uranium plutonium carbide PuC U . Uranium carbide is also a popular target material for particle accelerator s. Ammonia synthesis from nitrogen and hydrogen is sometimes accomplished in the presence of uranium carbide acting as a catalyst. ref Hutchings, G. J., et al., Uranium oxide based catalysts for the destruction ... & abstract of paper talk about uranium oxide. ref See also Uranium boride Thorium carbide References reflist DEFAULTSORT Uranium Carbide Category Carbides Category Uranium compounds Category Nuclear materials Inorganic compound stub fr carbure d uranium ar ... more details
Refimprove date December 2009 File Yellowcake.jpg thumb 230px Yellowcake , a mixture of uranium oxides. Uranium oxide is an oxide of the element uranium . The metal uranium forms several oxides Uranium dioxide or uranium IV oxide UO sub 2 sub , the mineral Uraninite or pitchblende Uranium trioxide or uranium VI oxide UO sub 3 sub Triuranium octoxide U sub 3 sub O sub 8 sub , the most stable uranium oxide, yellowcake typically contains 70 to 90 percent triuranium octoxide Uranyl peroxide UO sub 2 sub O sub 2 sub or UO sub 4 sub Uranium dioxide is oxidized in contact with oxygen to form triuranium octoxide. 3 UO sub 2 sub 4 O sub 2 sub U sub 3 sub O sub 8 sub at 700 C 970 K Uranium Oxide is one of the few compounds which bonds in Fibonacci numbers of atoms, e.g. 3 Uraniums and 8 Oxygens etc. Uranium Oxide compounds pair up in Fibonacci numbers skipping one out in the middle, for example, Triuranium Octoxide, with 3 Uranium atoms and 8 Oxygen atoms. ref cite book last Olsen first Scott title The Golden Section Nature s Greatest Secret year 2009 publisher Wooden Books Ltd location Glastonbury isbn 190426347X pages 10 url http books.google.co.uk books about The Golden Section.html?id xu Mip5HWMQC&redir esc y ref Preparation 38 During World War II Preparation 38 was the codename for uranium oxide used by the German scientists. ref Per F. Dahl, Heavy water and the wartime race for nuclear energy Institute of Physics Publishing, London 1999 , p. 135 ref References Reflist DEFAULTSORT Uranium Oxide Category Oxides Inorganic compound stub ca xid d urani de Uranoxid fr Oxyde d uranium ko it Ossido di uranio pl Tlenki uranu ru ... more details
Infobox company company name Uranium One Inc. company logo Image Uranium One logo.svg 200px company type ... President small industry Uranium , Gold products revenue parent ARMZ Uranium Holding Co. 51 operating ... CA UUU&page quotesearch title Company Profile for Uranium One Inc CA UUU accessdate 2008 10 10 ref market cap 487 million USD ref name zenobank homepage http www.uranium1.com www.uranium1.com Uranium One TSX UUU , jse UUU also known as sxr Uranium One is a Canada Canadian based uranium mining company ... Resources Inc. and Aflease Gold and Uranium Resources Ltd announced that they would be merging under the name SXR Uranium One Inc. ref http www.wise uranium.org ucscr.html WISE Uranium Project ref In June 2009, the Russian uranium mining company ARMZ Uranium Holding Co. ARMZ , a part of Rosatom , acquired 16.6 of shares in Uranium One in exchange for a 50 interest in Karatau uranium mining project ... url http www.world nuclear news.org newsarticle.aspx?id 25418&terms ARMZ title Kazakh tie in for Uranium One and ARMZ date 2009 06 15 accessdate 2009 06 24 ref In June 2010, Uranium One acquired 50 and 49 respective interests in southern Kazakhstan based Akbastau and Zarechnoye uranium mines from ARMZ. In exchange, ARMZ increased its stake in Uranium One to 51 . The acquisition resulted in a 60 annual production increase at Uranium One, from approximately 10 million to 16 million lb. ref http www.uranium1.com uploads articles UUU 20Press 20Release 20June 208 202010 FINAL.pdf Uranium One to Acquire ... nuclear news.org C ARMZ takes hold of Uranium One 0906107.html title ARMZ takes hold of Uranium One ... Uranium One paid its minority shareholders a significant dividend of 1.06 United States Dollars at the end of 2010. See also List of uranium mines Uranium Participation Corporation References Reflist ... EN&issuerType 03&issuerNo 00005203 SEDAR company profile Portal Companies Category Uranium mining companies of Canada Category S&P TSX Composite Index Canada company stub de SXR Uranium One fr Uranium ... more details
chembox verifiedrevid 403120211 Name Uranium sulfate ImageFile Uranium sulfate.jpg ImageSize 200px ImageName Uranium sulfate OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 11383849 InChI 1 H2O4S.U c1 5 2,3 4 h H2,1,2,3,4 q 2 p 2 InChIKey SMWCBVIJCHHBAU NUQVWONBAD SMILES U 2 . O S O O O StdInChI Ref stdinchicite correct chemspider StdInChI 1S H2O4S.U c1 5 2,3 4 h H2,1,2,3,4 q 2 p 2 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey SMWCBVIJCHHBAU UHFFFAOYSA L CASNo Ref cascite correct ?? CASNo Section2 Chembox Properties Formula U SO sub 4 sub sub 2 sub MolarMass 430.15 g mol Density Solvent SolubleOther MeltingPt BoilingPt Uranium sulfate U SO sub 4 sub sub 2 sub is a water soluble salts salt of uranium . It is a very toxic Chemical compound compound and should not be ingested. Uranium sulfate minerals commonly are widespread around uranium bearing mine sites, where they usually form during the evaporation of acid sulfate rich mine tailings which have been leached by oxygen bearing waters. Uranium sulfate is a transitional compound in the production of Uranium hexafluoride . It was also used to fuel aqueous Homogeneous Reactor s Preparation Uranyl sulfate in solution is readily photochemically reduced to uranium IV sulfate. The photoreduction can be carried out in the sunshine and this requires the addition of ethanol as a reducing agent. Uranium IV crystallizes or is precipitated by ethanol in excess. It can be obtained with different degrees of hydration. References reflist cite doi 10.1002 zaac.19804620127 DEFAULTSORT Uranium Sulfate Category Uranium compounds Category Sulfates Uranium compounds Inorganic compound stub fr Sulfate d uranium IV ... more details
Natural uranium NU refers to refined uranium with the same isotopic ratio as found in nature. It contains 0.7 uranium 235 , 99.3 uranium 238 , and a trace of uranium 234 by weight. 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 UO sub 2 sub ceramic forms, however experimental fuelings with uranium trioxide UO sub 3 sub and triuranium octaoxide , U sub 3 sub O sub 8 sub have shown promise. http www.ornl.gov webworks cppr y2001 rpt 115351.pdf The 0.72 U 235 is not sufficient to produce a self sustaining critical chain reaction in light water reactor s or nuclear weapon s these applications must use enriched uranium . In rare occasions, earlier in geologic history when U 235 was more abundant, uranium ore was found to have naturally engaged in fission, forming natural nuclear fission reactor s. 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 at present. See also Depleted uranium Enriched uranium Oralloy Nuclear engineering Nuclear fuel cycle Nuclear physics Nuclear reactor Nuclear weapon Natural nuclear fission reactor Oklo reactor List of uranium mines External links http www.nuclearfaq.ca brat fuel.htm The evolution of CANDU fuel cycles References Design Parameters for a Natural Uranium Fueled Nuclear Reactor, C. M. Hopper et al. , ORNL TM 2002 240, November 2002. Category Uranium ko ja ... more details
Image U glass above.jpg thumb A uranium glass cakeplate 300 px Image U glass with black light.jpg thumb 300px Uranium glass glowing under UV light Image Vacuum capacitor with uranium glass.jpg thumb Uranium glass used as lead in seals in a vacuum capacitor Uranium glass is glass which has had uranium ... from trace levels to about 2 by weight uranium, although some 19th century pieces were made with up to 25 uranium. ref Big Book of Vaseline Glass, by Barrie Skelcher, Pub. Schiffer ref ref http www.orau.org ptp collection consumer 20products vaseline.htm Vaseline and uranium glass ca. 1930s ref Uranium ... of uranium to most industries was sharply curtailed during the Cold War . Most such objects ... in Glass Glass art art glassware . Otherwise, modern uranium glass is now mainly limited to small objects like beads or marbles as scientific or decorative novelties. Appearance The normal colour of uranium ... Colours glass colourants . Uranium glass also fluorescence fluoresces bright green under ultraviolet ... most pieces of uranium glass are considered to be harmless and only negligibly radioactive . ref cite journal last Betti first Maria title Civil use of depleted uranium journal Journal of Environmental ... 5 pmid 12500798 issue 2 3 ref Vaseline glass The most typical colour of uranium glass is pale yellowish ... still define vaseline glass as transparent or semitransparent uranium glass in this specific colour. Vaseline glass is now frequently used as a synonym for any uranium glass, especially in the United ... uranium content which requires a blacklight test to verify the characteristic green fluorescence ... other common subtypes of uranium glass have their own nicknames custard glass opaque or semiopaque ... ite are often applied on the basis of superficial appearance rather than uranium content. Similarly ... Depression regardless of appearance or formula. Image Uranium Glass Collection.jpg thumb left A collection of various uranium glassware 300 px History File Fluorescent Uranium Depression Glass.jpg ... more details
Uranium fluoride can refer to Uranium trifluoride , UF sub 3 sub Uranium tetrafluoride , UF sub 4 sub Uranium pentafluoride , UF sub 5 sub Uranium hexafluoride , UF sub 6 sub Tetrauranium heptadecafluoride , U sub 4 sub F sub 17 sub Tetrauranium octadecafluoride , U sub 4 sub F sub 18 sub See also Uranyl fluoride , UO sub 2 sub F sub 2 sub disambig de Uranfluorid pl Fluorek uranu ru ... more details
Uranium production is an important part of the African economy , with Niger , Namibia and South Africa creating up to 18 of the world s annual production. Many African countries produce uranium or have untapped uranium ore deposits . ref http www.bgs.ac.uk downloads start.cfm?id 1409 Uranium Commodity Profile ref List flagicon Algeria Algeria Tamanrasset ref http www.magharebia.com cocoon awi xhtml1 en GB features awi features 2005 10 03 feature 01 ref flagicon Angola Angola Cabinda Province ref http www.afrol.com articles 18320 ref flagicon Botswana Botswana Mokobaesi Letlhakane Project A Cap Resources ref http allafrica.com stories 200801090850.html ref ref http www.acap.com.au companyprofile.htm ref flagicon Democratic Republic of the Congo Democratic Republic of the Congo Kolwezi Shinkolobwe Shinkolobwe mine closed 2004 flagicon Gabon Gabon Several List of uranium mines Closed uranium mines closed uranium mines exist in Gabon. Franceville Mounana closed Franceville Oklo closed flagicon ... two large mines in the Air Mountains of Agadez Region . Arlit Uranium industry Arlit , Areva NC Iferouane , Areva NC Imouraren Areva SA ref http beta.miningreview.com node 12757 ref Niger Uranium ltd ref http www.niger uranium.com ref flagicon Nigeria Nigeria Mining in Nigeria Uranium flagicon South ... , Gauteng Mintails project AngloGold Ashanti s East Rand Gold and Uranium operation ERGO gold and uranium joint venture with DRDGold ref http mintails.com resources uranium ref ref http mintails.com operations ergo ref First Uranium , listed on the Johannesburg Securities Exchange symbol FIU ... gold and uranium ref http www.miningreview.com archive mra 6 2005 pdf 38 39.pdf ref flagicon Sudan Sudan ... Economy of Africa List of uranium mines Uranium market References reflist External links http allafrica.com AllAfrica News http www.wise uranium.org upafr.html WISE Uranium Project New Uranium Projects ... Africa Category Uranium Category Mining in Africa ... more details
chembox verifiedrevid 451188952 Name Uranium tetrafluoride ImageFile Kristallstruktur Uran IV fluorid.png ImageSize 200px IUPACName Uranium IV fluoride br Uranium tetrafluoride OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 14676181 InChI 1 4FH.2U h4 1H q 2 2 p 4 InChIKey CWWZGQYYTNZESQ XBHQNQODAW SMILES U 2 . U 2 . F . F . F . F StdInChI Ref ... c, No. 15 Section7 Chembox Hazards ExternalMSDS http physchem.ox.ac.uk MSDS UR uranium tetrafluoride.html ... Related OtherAnions Uranium IV chloride br Uranium IV bromide br Uranium IV iodide OtherCations ... Uranium hexafluoride br Uranium dioxide Uranium tetrafluoride UF sub 4 sub is a green crystalline solid compound of uranium with an insignificant vapor pressure and very slight solubility in water. Uranium in its tetravalent uranous state is very important in different technological processes. In the uranium refining industry it is known as green salt . UF sub 4 sub is generally an intermediate in the conversion of uranium hexafluoride UF sub 6 sub to either uranium oxide s U sub 3 sub O sub 8 sub or UO sub 2 sub or uranium metal. It is formed by the reaction of UF sub 6 sub with hydrogen gas in a vertical tube type reactor or by the action of hydrogen fluoride HF on uranium dioxide . UF sub 4 sub is less stable than the uranium oxides and reacts slowly with moisture at ambient temperature ... 4.5 g cm sup 3 sup depending on the production process and the properties of the starting uranium compounds ... efficiency, lower vapor pressure and better chemical stability. Like all uranium salts UF ... cite web url http web.ead.anl.gov uranium guide ucompound propertiesu tetrafluoride.cfm title Uranium ... Laboratory accessdate 22 November 2011 Uranium compounds DEFAULTSORT Uranium Tetrafluoride Category Uranium compounds Category Nuclear materials Category Fluorides Category Metal halides Category Inorganic compounds de Uran IV fluorid es Tetrafluoruro de uranio fr T trafluorure d uranium pl Fluorek ... more details
chembox verifiedrevid 437975773 Name Uranium nitride ref cite journal title Fabrication and testing of uranium nitride fuel for space power reactors author R. B. Matthews, K. M. Chidester, C. W. Hoth, R. E. Mason, R. L. Petty journal Journal of Nuclear Materials volume 151 issue 3 year 1988 pages 345 doi 10.1016 0022 3115 88 90029 3 ref IUPACName Uranium nitride ImageFile La2O3structure.jpg Section1 Chembox Identifiers CASNo 12033 83 9 Section2 Chembox Properties Formula U sub 2 sub N sub 3 sub MolarMass 518.078 g mol Appearance crystalline solid Density 11300 kg m 3, Solid Solubility 0.08 g 100 ml 20 C MeltingPt 900 C decomposes to UN BoilingPt Decomposes Section3 Chembox Structure CrystalStruct Hexagonal, Pearson symbol hP5 SpaceGroup P 3m1, No. 164 Uranium nitride refers to a family of several ceramic compounds uranium mononitride UN , uranium sesquinitride U sub 2 sub N sub 3 sub , which exists in either an alpha or beta phase, and uranium dinitride UN sub 2 sub . Uranium mononitride was used as driver fuel for two core loads of the sodium cooled BR 10 reactor in Russia. It has also ... which makes uranium mononitride highly attractive as a nuclear fuel is the combination of a high ... 8 times higher than that of uranium dioxide, the most commonly used nuclear fuel, at typical operating ... restructuring of the fuel, which limits fuel lifetime. Uranium nitride can be synthesized by the reaction of nitrogen with uranium at 700 K. ref Cotton, Simon 1991 Lanthanides and Actinides. New York Oxford University Press, p. 126 ref Uranium nitride may be formed as a minor product of uranium combustion in air however, the more thermodynamically stable uranium dioxide will be the major product. According to an article in Nuclear Engineering International , uranium nitride enriched to less ..., however, incorrectly states that uranium sesquinitride will be used, rather than uranium mononitride ... reflist Category Nitrides Category Uranium compounds inorganic compound stub fr Trinitrure de ... more details
Reprocessed uranium RepU is the uranium recovered from nuclear reprocessing , as done commercially in France ... plutonium production programs. This uranium actually makes up the bulk of the material separated during ... uranium has not been common because of low prices in the uranium market of recent decades, and because it contains undesirable isotopes of uranium . class wikitable sortable Isotopic composition of reprocessed uranium ref http world nuclear.org info inf69.html ref Isotope Proportion Characteristics uranium 238 99 Fertile material uranium 237 0 Around 0.001 at discharge, but half life only 1 week uranium 236 0.4 0.6 ref http world nuclear.org info inf69.html ref Neither fissile nor fertile ... in a geological repository uranium 235 0.4 0.6 Fissile material uranium 234 0.02 Fertile material but can affect reactivity differently ref http www.francenuc.org en mat uranium4 e.htm Uranium from reprocessing ref uranium 233 trace Fissile material uranium 232 trace Decay product thallium 208 emits strong gamma radiation making handling difficult In the last few years uranium prices have risen again, and if the price becomes high enough, it is possible that reprocessed uranium will be re enriched uranium enriched and reused. A higher enrichment level will be required to compensate for the sup ... uranium, like depleted uranium , will be usable in their breeding blankets. There have been some studies involving the use of reprocessed uranium in CANDU reactors. CANDU is designed to use natural uranium as fuel the U 235 content remaining in spent PWR BWR fuel is typically greater than that found in natural uranium, allowing the re enrichment step to be skipped. Fuel cycle tests also have ... Laboratory Module K2 Aqueously Reprocessed Uranium Conversion and Disposition Module K3 Pyrochemically Pyrometallurgically Reprocessed Uranium Conversion and Disposition Nuclear Technology Category Actinides Category Nuclear materials Category Nuclear reprocessing Category Uranium de Abreicherung ... more details
Uranium tailings are a waste byproduct tailings of uranium mining . In mining, the raw uranium ore is brought to the surface and crushed into a fine sand. The valuable uranium bearing minerals are then mechanically removed, and the remaining radioactive sand, called uranium tailings , is stored in huge impoundments. If these uranium tailings are left on the surface and allowed to dry out, the radioactive sand can be carried great distances by the wind, entering the food chain and bodies of water. The danger posed by such sand dispersal is uncertain at best given the dilution effect of dispersal. The majority of tailing mass will be inert rock, just as it was in the raw ore before the extraction of the uranium, but physically altered, ground up, mixed with large amounts of water and exposed to atmospheric oxygen, which can substantailly alter chemical behaviour. Uranium tailings contain over a dozen radioactive nuclides, which are the primary hazard posed by the tailings. The most important of these are thorium thorium 230 , radium radium 226 , radon radon 222 radon gas and the daughter isotopes of radon decay, including polonium polonium 210 . An EPA estimate of risk based on uranium tailings deposits existing in the United States in 1983 gave the figure of 500 lung cancer deaths per century, if no countermeasures are taken. ref cite web url http www.wise uranium.org uwai.html TAILHAZ title Uranium Mining and Milling Wastes An Introduction author Peter Diehl accessdate 2009 10 02 ref This unit of reporting the risk greatly underestimates risk to local populations. See also List of uranium mines References reflist DEFAULTSORT Uranium Tailings Category Radioactive waste chem stub ... more details
Distinguish depleted uranium Merge Peak uranium date October 2009 Uranium depletion is the result of extracting and consuming uranium, a non renewable resource . The availability of high grade uranium ... to extract. ref cite web url http www.world nuclear.org info default.aspx?id 438 title Supply of Uranium ... ref Limits to the impact of uranium depletion Uranium is different from conventional energy resources ... uranium shortages, but most have no bearing on the eventual depletion. Some key features are The uranium ... in the price of uranium do not significantly affect the economics of nuclear power plants, because the cost of natural uranium makes up a very small fraction of the plant s operating costs about 9 . ref ... of uranium, stockpiling of several years worth of fuel is feasible. Significant secondary supplies of already mined uranium exist, including decommissioned nuclear weapons, depleted uranium tails suitable for reenrichment, and existing stockpiles. Vast amounts of uranium, roughly 800 times the known reserves of mined uranium, are contained in extremely dilute concentrations in seawater. Introduction of fast neutron reactor s, combined with seawater uranium extraction, would make the uranium supply ... ref http www.world nuclear.org info inf98.html ref . Uranium production Primary sources About 96 of the global uranium reserves are found in these ten countries Australia , Canada , Kazakhstan , South Africa , Brazil , Namibia , Uzbekistan , USA , Niger , and Russia ref cite web title Uranium reserves publisher European Nuclear Society author url http www.euronuclear.org info encyclopedia u uranium ... 23 are the major producers. ref cite web url http www.uxc.com fuelcycle uranium production uranium.html title World Uranium Production publisher UxC date 2007 11 27 accessdate 2008 03 15 ref In 1996, the world produced 39,000 tonnes of Uranium. ref cite web url http www.uic.com.au nip41.htm title World Uranium Mining, Nuclear Issues Briefing Paper 41 publisher Australian Uranium Association date ... more details
Infobox Company company name Star Uranium company logo company type Public company Public br tsxv SUV genre foundation 1985 this parameter modifies Founded founder location city Saskatoon location country Canada key people Kyle Kozuska ref name zenobank cite web url http www.zenobank.com index.php?symbol CA SUV&page quotesearch title Company Profile for Star Uranium Corp CA SUV accessdate 2008 10 16 ref industry Mining products Uranium br Diamond revenue net income divisions homepage http www.staruranium.com www.staruranium.com Star Uranium is a Canada Canadian resource company with its head office in Saskatoon , Saskatchewan . The company is focused on the acquisition, exploration and development of uranium , diamond and other precious metal properties. Properties Uranium Alexander Lake , Saskatchewan Collins Bay , Saskatchewan Cree Lake , Saskatchewan David Lake Saskatchewan David Lake , Saskatchewan Pardoe Lake , Saskatchewan Stony Rapids , Saskatchewan Diamond Fort la Corne Provincial Forest Fort la Corne , Saskatchewan Peace River Buffalo Head Hills , Alberta Zama Lake , Alberta Other precious metals Anglo Rouyn , Saskatchewan Disputes Since June 2003 the company together with sister company United Uranium had a dispute with Shore Gold over ownership of 25 groups of mineral claims totaling over 35,000 hectares in the Fort la Corne area of Saskatchewan. The issue was all about who was first in line at the Department of Mineral Resources of the Government of Saskatchewan to register mineral deposit claims. On March 1, 2007 a Saskatchewan court ruled in favor of Star Uranium but on March 30, 2007 Shore Gold appealed the court ruling. On July 9, 2008, the Court of Appeal for Saskatchewan ruled that Star Uranium and United Uranium were entitled to register mineral claims to 25 blocks of land in the Fort la Corne area. References reflist Saskatoon Corporations Category Uranium mining companies of Canada Category Diamond mining companies of Canada Category Companies ... more details
Uraniumuranium dating is a radiometric dating technique which compares two isotope s of uranium U in a sample sup 234 sup U and sup 238 sup U. sup 234 sup U sup 238 sup U dating is one of several radiometric dating techniques exploiting the uranium radioactive decay series, in which sup 238 sup U undergoes 14 alpha decay alpha and beta decay events while decaying to the stable isotope sup 206 sup lead Pb . Other dating techniques using this decay series include uranium thorium dating uranium thorium using sup 230 sup Th sup 238 sup U and uranium lead dating . sup 238 sup U, with a half life of about 4.5 billion years, decays to sup 234 sup U through emission of an alpha particle to an isotope of thorium sup 234 sup Th , which is comparatively unstable with a half life of just 24 days. sup 234 sup Th then decays through beta particle emission to an isotope of protactinium , sup 234 sup Pa ... sup Th, has a half life of about 75,000 years and is used for the related uranium thorium dating sup ... the initial ratio is known, uranium thorium dating sup 230 sup Th sup 238 sup U remains a superior .... 450,000 year upper limit of the uranium thorium dating sup 230 sup Th sup 238 sup U technique. Unlike other radiometric dating techniques, those using the uranium decay series except for those using ... techniques between the ranges of uranium thorium dating sup 230 sup Th sup 238 sup U accurate up to ca. 450,000 years and Uranium lead dating U Pb dating accurate up to the age of the solar system ... 8, 2005. Shakhashiri, Bassam. http scifun.chem.wisc.edu chemweek uranium uclock.htm Chemical of the Week Uranium . University of Wisconsin Madison Chemistry Department. Retrieved July 8, 2005. http www.britannica.com eb article?tocId 9074426&query Uranium 234 Uranium 238 20Dating&ct Uranium 234 uranium 238 dating . Encyclop dia Britannica . Retrieved July 8, 2005. Category Radiometric dating Category Uranium ... more details
Image 2007Uranium.PNG thumb right 300px 2007 uranium mining, by nationality. Data is taken from http www.world nuclear.org info inf23.html . File Uranium production world.PNG thumb right 300px World Uranium production in 2005. Uranium mining is the process of extraction of uranium ore from the ground. The worldwide production of uranium in 2009 amounted to 50,572 tonne s, of which 27 was mined in Kazakhstan ... of world uranium production. Other important uranium producing countries in excess of 1000 tonnes ... url http www.world nuclear.org info inf23.html title World Uranium Mining publisher World Nuclear Association accessdate 2010 06 11 ref A prominent use of uranium from mining is as fuel for nuclear power plant s. As of 2008, known uranium ore resources that can be mined at about current costs are estimated ... cite web url http www.nea.fr html general press 2008 2008 02.html title Uranium resources sufficient ... Energy Agency NEA quote Uranium 2007 Resources, Production and Demand , also known as the Red Book, estimates the identified amount of conventional uranium resources which can be mined for less ... of money. Undiscovered resources, i.e. uranium deposits that can be expected to be found ... by higher prices. accessdate 2008 06 16 ref After mining uranium ores, they are normally ... the uranium by chemical leaching. The milling process commonly yields dry powder form material consisting of natural uranium, yellowcake , which is sold on the uranium market as U sub 3 sub O sub 8 sub . History Uranium minerals were noticed by miners for a long time prior to the discovery of uranium in 1789. The uranium mineral pitchblende, also known as uraninite , was reported from the Ore ... from 1727 in Joachimsthal and 1763 in Schwarzwald . ref Franz J. Dahlkamp 1993 Uranium ore deposits Springer Verlag, Berlin, 460 p. ISBN 3 540 53264 1. ref In the early 19th century, uranium ore was recovered ... J chymov to isolate the element radium , a decay product of uranium her death was from aplastic anemia ... more details
Image 2007Uranium.PNG thumb right 350px 11 countries are responsible for 97 of the global uranium extraction in 2007. The uranium market , like all commodity market s, has a history of volatility, moving .... The only significant commercial use for uranium is to fuel nuclear reactor s for the generation of electricity ... Reactors Worldwide url http www.world nuclear.org info inf17.html ref Before uranium is ready for use ... are identified as the front end of the nuclear fuel cycle uranium mining mining it either underground or in open pit mine s , milling it into yellowcake , enriched uranium enriching it and finally Nuclear ... these three services. Available supply Main Uranium mining Peak uranium Image MonthlyUraniumSpot.png thumb right 260px Monthly uranium spot price in US per pound. The Uranium bubble of 2007 2007 ... Monthly Uranium Spot url http www.uranium.info index.cfm?go c.page&id 29 work publisher accessdate ref Image Uranium resources.svg thumb 260px The Estimate of Available Uranium depends on what resources .... S. year 2004 chapter Uranium and thorium resource assessment editor last Cleveland editor first C ... book author Nuclear Energy Agency NEA , IAEA year 2006 title Uranium 2005 Resources, Production and Demand ... of uranium, economically recoverable at a price of US 130 kg, are enough to last for some 80 years ... that the world supply of uranium is effectively inexhaustible, and could therefore be considered ... reactor s, fueled by naturally replenished uranium extracted from seawater, could supply energy ... use uranium 238 , which is more common than the uranium 235 required by conventional reactors. Market operations Unlike other metals such as copper or nickel, uranium is not traded on an organized ... for the trade of on and off exchange uranium futures contracts. The structure of uranium supply ..., such as the uranium spot price, and rules for escalation. In base escalated contracts, the buyer and seller ... at or near the published spot market price at the time of purchase. However 85 of all uranium has been ... more details
Chembox Verifiedfields changed verifiedrevid 470619917 OtherNames Uranium III hydride ref cite book author ... isbn 978 0 8155 1596 8 pages 307 ref br Uranium trihydride ref name wib cite book author1 Egon Wiberg ... Chembox Hazards ExternalMSDS http www.ibilabs.com Uranium 20Hydride MSDS.htm ibilabs.com FlashPt Pyrophoric Uranium hydride , also called uranium trihydride UH sub 3 sub is an inorganic compound , a transition metal hydride hydride of uranium . Properties Uranium hydride is a highly toxic, brownish ..., much lower than that of uranium 19.1 . It has a metallic conductivity, is slightly soluble in hydrochloric acid and decomposes in nitric acid . Two crystal modifications of uranium hydride exist, both ... 11 October 2011 year 2005 publisher Elsevier isbn 978 0 08 044586 1 pages 901 ref Formation in uranium metal Hydrogen gas reaction Exposition of uranium metal to hydrogen leads to hydrogen embrittlement ... Uranium metal heated to 250 to 300 Celsius C 482 to 572 Fahrenheit F reacts with hydrogen to form uranium ... uranium hydrides convenient starting materials to create reactive uranium powder along with various uranium carbide , nitride , and halide compounds. ref name EncyChem782 Cite book title The Encyclopedia of the Chemical Elements chapter Uranium year 1968 authorlink Glenn T. Seaborg first Glenn T. last ... ref The reversible reaction proceeds as follows ref name wib 2 U 3 H sub 2 sub 2 UH sub 3 sub Uranium ... crystal structure lattice , each uranium atom is surrounded by 6 other uranium atoms and 12 atoms ... 2010 02 07 ref The density of hydrogen in uranium hydride is approximately the same as in liquid ... Publishing House year 2007 isbn 8183562418 accessdate 2010 02 07 ref Water reaction Uranium hydride forms when uranium metal in e.g. Magnox fuel with corroded Cladding nuclear fuel cladding gets ... The formed uranium hydride is pyrophoric when the metal e.g. a damaged fuel rod gets exposed to air afterwards, a lot of heat may be generated and the bulk uranium metal itself can be ignited. ref cite ... more details
Infobox Company company name United Uranium company logo company type Public company Public br tsxv UUC genre foundation 1985 this parameter modifies Founded founder location city Saskatoon location country Canada key people Eric Wray ref name zenobank cite web url http www.zenobank.com index.php?symbol CA UUC&page quotesearch title Company Profile for United Uranium Corp CA UUC accessdate 2008 10 17 ref industry Mining products Uranium br Diamond br Gold revenue net income divisions homepage http www.uniteduranium.com www.uniteduranium.com United Uranium formerly known as United Carina Resource is a Canada Canadian resource company with its head office in Saskatoon , Saskatchewan . The company is focused on the acquisition, exploration and development of natural resources such as uranium , diamond , copper and other precious metal s. Properties Uranium Hatchet Lake , Saskatchewan , Denison Mines , 50 South Bear Project , Saskatchewan Diamond Fort la Corne Provincial Forest Fort la Corne , Saskatchewan, Star Uranium, 50 Peace River Buffalo Head Hills , Alberta , Star Uranium, 50 Other precious metals Gold Anglo Rouyn , Saskatchewan, Star Uranium, 50 Pine Lake , Saskatchewan, Claude Resources , 50 Disputes Since June 2003 the company together with sister company Star Uranium had a dispute with Shore Gold over ownership of 25 groups of mineral claims totaling over 35,000 hectares in the Fort la Corne area of Saskatchewan. The issue was all about who was first in line at the Department of Mineral Resources of the Government of Saskatchewan to register mineral deposit claims. On March 1, 2007 a Saskatchewan court ruled in favor of United Uranium but on March 30, 2007 Shore Gold appealed to the court ruling. On July 9, 2008 the Court of Appeal for Saskatchewan ruled that United Uranium and Star Uranium were entitled to register mineral claims to 25 blocks of land in the Fort la Corne area. References reflist Saskatoon Corporations Category Uranium mining companies ... more details
chembox verifiedrevid 446398737 Name Uranium dioxide ImageFile UO2lattice.jpg IUPACName Uranium dioxide br Uranium IV oxide OtherNames Urania br Uranous oxide Section1 Chembox Identifiers CASNo 1344 57 ... Related OtherAnions OtherFunctn Triuranium octoxide br Uranium trioxide Function uranium oxide s OtherCpds Uranium dioxide or uranium IV oxide Uranium Oxygen sub 2 sub , also known as urania or uranous oxide , is an oxide of uranium , and is a black, radioactive, crystalline powder that naturally occurs in the mineral uraninite . It is used in nuclear fuel rods in nuclear reactors . A mixture of uranium ... in ceramic ceramic glaze glaze s and glass . Production Uranium dioxide is produced by reducing uranium trioxide with hydrogen . UO sub 3 sub H sub 2 sub UO sub 2 sub H sub 2 sub O at 700 C ... uranium enrichment of uranium for nuclear fuel. Chemistry Structure The solid is isostructural ... have the same structures. Oxidation Uranium dioxide is oxidized in contact with oxygen ... K The electrochemistry of uranium dioxide has been investigated in detail as the galvanic corrosion of uranium dioxide controls the rate at which used nuclear fuel dissolves. See the spent nuclear fuel page for further details. Water increases the oxidation rate of plutonium and uranium metals. ref ... of Plutonium Dioxide with Water and Oxygen Hydrogen Mixtures Mechanisms for Corrosion of Uranium and Plutonium accessdate 2009 06 06 ref Uses File FuelPellet1.jpg thumb left Uranium oxide fuel ... rod s in nuclear reactor s. Note that the thermal conductivity of uranium dioxide is very low when compared with uranium , uranium nitride , uranium carbide and zirconium cladding material. This low ... and uranium dioxide as a function of temperature Image rim200pd250rad1000fueltemp.jpg This is a 20 ... solid. gallery Color for ceramic glaze File RIAN archive 132609 Uranium dioxide fuel pellet starting material.jpg left thumb Starting material containers for uranium dioxide fuel pellet production at a plant ... more details
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