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1 edition of High-temperature reactions of uranium dioxide with various metal oxides found in the catalog.

High-temperature reactions of uranium dioxide with various metal oxides

High-temperature reactions of uranium dioxide with various metal oxides

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Published by U.S. Govt. Print. Off. in Washington .
Written in English

    Subjects:
  • Uranium oxides.,
  • Metallic oxides.,
  • Phase rule and equilibrium.

  • Edition Notes

    Bibliography: p. 31-32.

    Statement[S.M. Lang...[et al.]]
    SeriesNBS circular ;, 568
    ContributionsLang, Stewart M.
    Classifications
    LC ClassificationsQC100 .U555 no. 568
    The Physical Object
    Pagination32 p. :
    Number of Pages32
    ID Numbers
    Open LibraryOL6215969M
    LC Control Number56060553
    OCLC/WorldCa10992729

    The evolution of deuterium gas (D 2) and oxygen (O 2) following electron irradiation of deuterium oxide (D 2 O)-covered uranium dioxide (UO 2) (III). By necessity, high-surface-area materials are typically used to increase signals when relying on the intrinsic radioactivity. Uranium processing, preparation of the ore for use in various products.. Uranium (U), although very dense ( grams per cubic centimetre), is a relatively weak, nonrefractory metal. Indeed, the metallic properties of uranium appear to be intermediate between those of silver and other true metals and those of the nonmetallic elements, so that it is not valued for structural applications.

      In this study, we sought, through experimental testing, to evaluate both the wettability of liquid CsI toward uranium dioxide (UO 2), a solid typically present in molten nuclear fuel, and the. The uranium dioxide and mixed-oxide fuels have been extensively studied over the last fifty years and much experience has been acquired in their design, fabrication, and use. The rationale for using these fuels is first described, followed by a review of its properties, fuel-pellet design and fabrication.

      According to the well-established thermodynamic data 3,22,23, oxidation of uranium dioxide by molecular oxygen (reaction (2)) is an exothermic reaction, with an enthalpy of ΔH 2 . offer improved high temperature performance than zirconium alloys but incur neutronic penalties. Surveys of the existing property databases of candidate U-Si compounds revealed that very little is known of even the more common uranium silicides with respect to .


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High-temperature reactions of uranium dioxide with various metal oxides Download PDF EPUB FB2

High-Temperature Reactions of Uranium Dioxide With Various Metal Oxides National Bureau of Standards Circular Issued Febru For sale by the Superintendent of Documents, U.

Government Printing Office Washing D. - Price 20 cents. Additional Physical Format: Online version: High-temperature reactions of uranium dioxide with various metal oxides. Washington: U.S. Govt. Print. Download Citation | OnS. Lang and others published High-Temperature Reactions of Uranium Dioxide with Various Metal Oxides | Find, read and cite all the research you need on.

HIGIJ-TEMPERATURE REACTIONS OF URANIUM DIOXIDE WITH VARIOUS METAL OXIDES' S. Lang, F. Knudsen, C. Fillmore, and R. Roth The high-temperature reactions of UO2 with 15 metal oixdes are described, usually in the form of phase Cited by:   1.

Introduction. A review of low temperature (below °C) oxidation of uranium dioxide appeared last year in this Journal, aimed at workers with this material in the nuclear review complements that work by focusing on the high temperature oxidation (above °C) of the various stable oxides of uranium and on the ultimate products of such oxidation, the various uranates that Cited by: Ogard, A.E., and Leary, J.A.

HIGH-TEMPERATURE HEAT CONTENT AND HEAT CAPACITY OF URANIUM DIOXIDE AND URANIUM DIOXIDE--PLUTONIUM DIOXIDE SOLID SOLUTIONS. Country unknown/Code not available: N.

p., Web. Uranium dioxide or uranium(IV) oxide (U O 2), 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 is used in nuclear fuel rods in nuclear reactors.A mixture of uranium and plutonium dioxides is used as MOX toit was used as yellow and black color in ceramic glazes and.

The reaction of uranium oxides and chlorine to prepare anhydrous uranium tetrachloride (UCl{sub 4}) are important to more economical preparation of uranium metal.

The most practical reactions require carbon or carbon monoxide (CO) to give CO or carbon dioxide (CO{sub 2}) as waste gases. At °, liquid sodium reduces uranium trioxide to the dioxide, no double oxide being present in the product At °, the product contains sodium uranate(V), Na 3 UO l analysis indicates that at °, sodium oxide and uranium dioxide react to form sodium uranate(V), for which an X-ray powder diffraction pattern is reported, and the reactions in liquid sodium are interpreted on this.

generalized: metallic (uranium, plutonium, and thorium) and ceramic (uranium dioxide, mixed oxide fuel MOX, uranium nitride and carbide).

In Section 3, thermophysical properties of coolants including some gases, water (H2O, D2O), liquid metals, their vapours and alloys (Na, NaK, Pb, PbBi, Li and others) are addressed.

The. Melting behavior of mixed U–Pu oxides under oxidizing conditions. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, DOI: / Bingyun Ao, Haiyan Lu.

First-principles energetics of rare gases incorporation into uranium dioxide. The review deals with surface reactions of the complex uranium oxide systems with relevance to catalysis and the environment. After a brief introduction on the properties of uranium oxides, the. According to other authors [9], the first compound of uranium oxide formed from the hydrogen reduction of UO 3, U 3 O 8, consists of uranium atoms with different oxidation states: one having the value (+4), while the other two (+6).

This means that hydrogen, by reducing the uranium trioxide, form networks of uranium dioxide and uranium trioxide. UOX. Uranium dioxide is a black semiconducting solid. It can be made by reacting uranyl nitrate with a base to form a solid (ammonium uranate).It is heated (calcined) to form U 3 O 8 that can then be converted by heating in an argon / hydrogen mixture ( °C) to form UO UO 2 is then mixed with an organic binder and pressed into pellets, these pellets are then fired at a much higher.

Uranium Dioxide: Properties and Nuclear Applications, Volume 7. Jack Belle. Naval Reactors, Division of Reactor Development, U. Atomic Energy Commission, - Nuclear fuels - pages. 0 Reviews. Preview this book. Thorium dioxide (ThO 2), also called thorium(IV) oxide, is a crystalline solid, often white or yellow in known as thoria, it is produced mainly as a by-product of lanthanide and uranium production.

Thorianite is the name of the mineralogical form of thorium dioxide. It is moderately rare and crystallizes in an isometric system. The melting point of thorium oxide is °C – the. • The reaction of uranium metal with anoxic liquid water is highly exothermic and produces stoichiometric uranium dioxide (UO2) and hydrogen.

• The reaction apparently proceeds through a uranium hydride intermediate that can sequester part of the hydrogen during the initial reaction. We report the structural properties of ultra-small ThO2 and UO2 nanoparticles (NPs), which were synthesized without strong binding surface ligands by employing a covalent organic framework (COF-5) as an inert template.

The resultant NPs were used to observe how structural properties are affected by decreasin Chemical Science HOT Article Collection.

core, and of the reaction between the material of the degraded core and concrete. For a liquid metal cooled fast breeder nuclear reactor, we take examples from the chemistry of the reactions between liquid sodium and fuel, and aspects of the determination of the equation of state of the oxide fuel for temperatures up to ca.

various high-temperature systems in which one of the compo¬ nents is uranium dioxide (UO2). An annotated bibliography of the reactions of the dioxide and of the oxidation and re¬ duction of the various reported uranium oxides was prepared for the personnel of the project. It was recently indi¬.

1. a method of producing uranium dioxide powder of an o/u mol ratio of about having homogeneous particles of between about 2 to about mircons and a particle density of at least 98% comprising the steps of precipitating ammonium diuranate from an aqueous solution of refined uranyl salt of less than grams per liter by the addition aqueous ammonia of a concentration of about 28% or.In particular, a mixed grid pattern configuration within a standard 17x17 PWR fuel assembly envelope makes the entire fuel assembly all-metal by replacing an outer row of conventional uranium dioxide fuel rods that had been included in the company's earlier PWR .1.

Introduction. The electrochemical reduction of metal oxides to their metal phase using molten-salt media has gained significant interest since the FFC Cambridge process was realised (Chen et al., ).Many studies have been performed in order to understand the electro-reduction pathway (Alexander et al., ; Schwandt & Fray, ).However, due to the high temperature at which .