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Topic: Uranium-235

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Uranium-235 - Wikipedia, the free encyclopedia Uranium-235 is an isotope of uranium that differs from the element's other common isotope, uranium-238, by its ability to cause a rapidly expanding fission chain reaction, i.e., it is fissile. Uranium- 235 is made through the mixture of uranium in centrifuges. This concentration is insufficient for a self sustaining reaction in a mass of pure uranium or a light water reactor; enrichment, which just means separating out the uranium-238, must take place to get a usable concentration of uranium-235. en.wikipedia.org /wiki/Uranium_235   (366 words)

It's Elemental - The Element Uranium Naturally occurring uranium consists of three isotopes: uranium-234, uranium-235 and uranium-238. Uranium was discovered by Martin Heinrich Klaproth, a German chemist, in the mineral pitchblende (primarily a mix of uranium oxides) in 1789. Uranium-238, uranium's most common isotope, can be converted into plutonium-239, a fissionable material that can also be used as a fuel in nuclear reactors. education.jlab.org /itselemental/ele092.html   (662 words)

Uranium Production - Nuclear Weapons Uranium is used in inertial guidance devices, in gyro compasses, as counterweights for aircraft control surfaces, as ballast for missile reentry vehicles, and as a shielding material. Uranium tetrachloride is produced by the reaction of carbon tetrachloride (CCl 4) with pure UO 2 at 700 °F. Many countries around the world have extracted uranium from its ores or from yellowcake. The ammonium-containing uranium salt is decomposed to UO 3 by heating, and this oxide is reduced to UO 2 with hydrogen or cracked NH 3. www.fas.org /nuke/intro/nuke/uranium.htm   (6776 words)

IEER Factsheet Uranium Uranium is generally used in reactors in the form of uranium dioxide (UO) or uranium metal; nuclear weapons use the metallic form. Uranium is the principal fuel for nuclear reactors and the main raw material for nuclear weapons. The property of uranium important for nuclear weapons and nuclear power is its ability to fission, or split into two lighter fragments when bombarded with neutrons releasing energy in the process. www.ieer.org /fctsheet/uranium.html   (1325 words)

World Nuclear Association Information and Issue Briefs Uranium and Depleted Uranium Uranium may also be mined by in situ leaching (ISL), where it is dissolved from the orebody in situ and pumped to the surface. Uranium is sold only to countries which are signatories of the Nuclear Non-Proliferation Treaty, and which allow international inspection to verify that it is used only for peaceful purposes. Uranium was discovered by Martin Klaproth, a German chemist, in 1789 in the mineral pitchblende, and was named after the planet Uranus. www.world-nuclear.org /info/inf14.htm   (3364 words)

Documentation and Diagrams of the Atomic Bomb The detonating head (or heads, depending on whether a Uranium or Plutonium bomb is being used as a model) that is seated in the conventional explosive charge(s) is similar to the standard-issue blasting cap. Uranium is a heavy metal, heavier than gold, and not only does it have the largest atoms of any natural element, the atoms that comprise Uranium have far more neutrons than protons. In a Uranium bomb, the neutron deflector serves as a safeguard to keep an accidental supercritical mass from occurring by bouncing the stray neutrons from the `bullet' counterpart of the Uranium mass away from the greater mass below it (and vice- versa). www.nuc.berkeley.edu /neutronics/todd/nuc.bomb.html   (4355 words)

Nuclear Facilities Management Uranium is a naturally occurring element containing uranium-235 and uranium-238 isotopes. The UF6 stream with the greater uranium-235 concentration is referred to as enriched uranium, while the stream that is reduced in its concentration of uranium-235 is referred to as depleted uranium. Enrichment is the process of increasing the concentration of uranium-235 while decreasing the concentration of uranium-238. www.ne.doe.gov /uranium/facts.html   (680 words)

La France nucleaire/Nuclear France: ENRICHMENT (ENGLISH) The uranium 235 is ionized, and the flux of uranium 235 and that of uranium 238, which contains most of the impurities, are condensed and collected. The gas in the middle of the recipient is enriched in uranium 235 while the gas near the wall is depleted. The presence of uranium 234 and uranium 236 in the UF6 containing reprocessed uranium (Repu) necessitates overenrichment in uranium 235 of between 0.4% and 0.7% if [Castaing 81-82]. www.francenuc.org /en_chn/enrichment_e.htm   (1558 words)

Uranium Radiation Properties Uranium mill tailings are the residual waste from the process of uranium extraction from the uranium ore. Compared to uranium ore, the alpha radiation of uranium mill tailings and thus the radiation hazard on ingestion or inhalation of tailings (dust) is approx. This is obtained from the uranium ore concentrate by refining and conversion. www.wise-uranium.org /rup.html   (2821 words)

Nuclear Fission Natural uranium is composed of 0.72% U-235 (the fissionable isotope), 99.27% U-238, and a trace quantity 0.0055% U-234. If a massive nucleus like uranium-235 breaks apart (fissions), then there will be a net yield of energy because the sum of the masses of the fragments will be less than the mass of the uranium nucleus. While uranium-235 is the naturally occuring fissionable isotope, there are other isotopes which can be induced to fission by neutron bombardment. hyperphysics.phy-astr.gsu.edu /hbase/nucene/fission.html   (592 words)

Nuclear Chemistry - Uranium Enrichment Uranium enrichment is currently used to produce fuel (3 to 4% U-235) for civilian nuclear reactors. The second, or beta calutrons, took the alpha product and enriched it to approximately 90% U-235 (weapons-grade uranium). Natural uranium contains 0.7205% of the U-235, the fissile isotope of uranium. chemcases.com /nuclear/nc-07.htm   (991 words)

CDC Radiation Emergencies Radioisotope Brief: Uranium-235 (U-235) and Uranium-238 (U-238) Uranium “enriched” into U-235 concentrations can be used as fuel for nuclear power plants and the nuclear reactors that run naval ships and submarines. Uranium is also a toxic chemical, meaning that ingestion of uranium can cause kidney damage from its chemical properties much sooner than its radioactive properties would cause cancers of the bone or liver. Because uranium decays by alpha particles, external exposure to uranium is not as dangerous as exposure to other radioactive elements because the skin will block the alpha particles. www.bt.cdc.gov /radiation/isotopes/uranium.asp   (401 words)

Howstuffworks "How Nuclear Power Works" U-235 makes up about 0.7 percent of the remaining uranium found naturally, while U-234 is even more rare and is formed by the decay of U-238. Uranium is a fairly common element on Earth, incorporated into the planet during the planet's formation. U-238 makes up 99 percent of the uranium on the planet. science.howstuffworks.com /nuclear-power1.htm   (222 words)

Materials (from floral decoration) --  Encyclopædia Britannica 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, respectively. www.britannica.com /eb/article-73800   (806 words)

Uranium - Uranium Corporation of India Limited The process produces huge quantities of uranium that are depleted in U-235 Chemical Formula: UO2, Uranium Oxide; Class: Oxides and Hydroxides It is the chief ore of uranium and radium, which is found in trace amounts. Uranium Corporation of India Ltd. was setup to mine Uranium ore and manufacture Uranium concentrate. cambodia.recommendlist.com /rl/cambodia-uranium.htm   (248 words)

World Nuclear Association Education Some Physics of Uranium For instance, to produce one kilogram of uranium enriched to 3.5% U235 requires 4.3 SWU if the plant is operated at a tails assay 0.30%, or 4.8 SWU if the tails assay is 0.25% (thereby requiring only 7.0 kg instead of 7.8 kg of natural U feed). When a neutron passes near to a heavy nucleus, for example uranium-235 (U-235), the neutron may be captured by the nucleus and this may or may not be followed by fission. 235 + 1 = 141 + 92 + 3, but a small loss in atomic mass may be shown to be equivalent to the energy released. www.world-nuclear.org /education/phys.htm   (3824 words)

NRC: Fact Sheet on Uranium Enrichment This type of uranium atom -- called uranium-235 (U-235) -- comprises less than one percent by weight of the uranium as it is mined or milled. The uranium fuel cycle begins by mining and milling uranium ore to produce "yellowcake" that is then converted into uranium hexafluoride (UF6). Throughout the global nuclear industry, uranium is enriched by one of two methods: gaseous diffusion and gas centrifuge. www.nrc.gov /reading-rm/doc-collections/fact-sheets/enrichment.html   (928 words)

Nuclear Weapon Design Li nuclei or cause the remaining uranium and plutonium in the weapon to undergo fission. Gun-assembled weapons using highly enriched uranium are considered the easiest of all nuclear devices to construct and the most foolproof. The Hiroshima weapon was gun-assembled and used 235 U as a fuel. www.fas.org /nuke/intro/nuke/design.htm   (3646 words)

Home The Uranium Hall of Fame is not about advertising, statistics, or pictures—its primary focus is the people who have molded the uranium industry into what it is today. Established digitally in 1996, The Uranium Hall of Fame, sponsored by New York Nuclear Corporation, is a place to honor individuals who have made significant contributions to the uranium industry. It is our hope that The Uranium Hall of Fame will help bring a more human perspective to this exciting industry. www.uranium.com   (159 words)

Uranium Uranium oxide has been used since Roman times for yellow pigments in glass. In 1841, French chemist Eugene Peligot extracted pure uranium metal, which caused little interest until March 1, 1869, when French physicist, Henry Becquerel serendipidously discovered radioactivity in uranium salts - suddenly uranium was hot stuff! Although only mildly radioactive, uranium compounds are toxic. chemlab.pc.maricopa.edu /periodic/U.html   (98 words)

Depleted Uranium and health - the implications for Iraq The depleted uranium is a residue of the Eurodif Tricastin gaseous diffusion enrichment plant in the Rhône valley. The uranium compounds which enter the body either through the wall of the gastro-intestinal tract or the lungs, can be broken down in the body fluids, and tetravalent uranium is likely to oxidize to the hexavalent form, followed by the formation of uranyl ions. The direct damage to lungs and kidneys by uranium compounds is thought to be the result of the combined radiation and chemical properties, and it is difficult to attribute a portion of the damage to these separate factors which cannot be separated in life. www.rimbaud.freeserve.co.uk /dhap99f.html   (17652 words)

uranium 235 the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. www.factmonster.com /ipd/A0722164.html   (53 words)

SJSU Virtual Museum His work involved establishing a chain reaction with uranium 235 or plutonium with fast neutrons. After the war he moved to Princeton, New Jersey and became the director of the Institute for Advanced Study. During World War II, Oppenheimer worked on the Manhattan Project which produced the world's first atomic bomb. www2.sjsu.edu /depts/Museum/opp.html   (208 words)

Uranium 235 Lyrics.... A new band has formed from the ashes of Uranium 235, and they are called Jupiter After Death. The band Uranium 235 has split since their debut album, Cultural Minority. They will be missed, as their sound was incredible, and the lyrics ever true to the goth/industrial scene. www.geocities.com /hisdyingangel/U235lyrics.html   (1251 words)

VH1.com : Uranium 235 : Artist Main New York City's industrial band Uranium 235 features vocalist/guitarist Shane, guitarist/vocalist Matt Brown, bassist Jimmy McConnell, keyboardist Chris Bride and drummer Rob Steele. Add a link to your "Uranium 235" fan site on VH1.com! Add a link to your Uranium 235 fan site on VH1.com! www.vh1.com /artists/az/uranium_235/artist.jhtml   (120 words)

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Uranium Enrichment Uranium enrichment is an isotopic separation process that increases the proportion of the uranium-235 isotope in relation to uranium-238 in natural uranium. Using uranium as a fuel in the types of nuclear reactors common in the United States requires that the uranium be enriched so that the percentage of the uranium-235 isotope is increased, typically to 3 to 5%. The stream having the greater uranium-235 concentration is referred to as enriched UF, while the stream that is reduced in its concentration of uranium-235 is referred to as depleted UF The depleted UF can be converted to other chemical forms, such as depleted uranium oxide or depleted uranium metal. web.ead.anl.gov /uranium/guide/depletedu/enrich/index.cfm   (460 words)

Nuclear Facilities Management The UF6 stream with the greater uranium-235 concentration is referred to as enriched uranium, while the stream that is reduced in its concentration of uranium-235 is referred to as depleted uranium. Uranium is a naturally occurring element containing uranium-235 and uranium-238 isotopes. Enrichment is the process of increasing the concentration of uranium-235 while decreasing the concentration of uranium-238. www.ne.doe.gov /uranium/facts.html   (680 words)

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