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Showing 1 to 13 of 13 for “"U3O8"”.
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Spectrographic analysis of carnotite ores for their U3O8 content
Includes bibliographical references.
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Thermal conductivity of UO2 and U3O8 epitaxial layers damaged by ion irradiation
… lies on 360 – 500 nm single crystal UO2 and U3O8 thin films grown on YSZ substrates. The U3O8 samples are formed by heating the UO2 in air for 2.5 hours at 600°C and slow cooling. From a comparison between data measured by an optical pump-probe technique – time-domain thermoreflectance (TDTR) …
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Life Cycle Analysis of Greenhouse Gas Emissions from the Mining and Milling of Uranium in Saskatchewan
… intensity is estimated as 45 kg CO2e/kg U3O8 at an average ore grade of 9.12% U3O8 based on relative U3O8 production volumes at Mine-Mill A, B, and C from 2006 to 2010. The 95% confidence interval for the production-weighted average result ranges from 42 to 49 kg CO2e/kg U3O8, indicating …
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X-ray photoelectron spectroscopy (XPS) study of single crystal UO2 and U3O8 on r-plane sapphire and yttrium stabilized zirconium (YSZ) substrates
… The analysis of thin films of UO2 and U3O8 is a relatively new field with minimal data on thin films. There is however some work on bulk UO2 and U3O8. We will be able to compare our data to the data from bulk UO2 and U3O8 and predict the results from basic XPS and XRD theory. …
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Application of Electromagnetic Methods to Identify and Characterize Sub-surface Structures Associated with the Coles Hill Uranium Deposit
… an estimated resource of 110 million pounds of U3O8 in place with a cutoff grade of 0.025 wt% U3O8. The deposit is localized along a geologic unit that parallels the Chatham Fault, which separates the Triassic Danville Basin to the east from the older crystalline rocks to the west. The location …
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Coating Parameters of Zirconium Carbide On Advanced Triso Fuels
… XRD analysis. This investigation also reduced U3O8 microspheres to UO2 in an argon atmosphere. The oxygen to metal ratio from the reduced U3O8 was back calculated from oxidation analysis performed with a TGA machine. Once consistent repeatability is shown with coating surrogate zirconia …
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Nuclear forensic applications of uranium oxide chemistry and morphology
… oxide samples: both high-purity UO2, alpha-U3O8, and alpha-UO3 samples, and several legacy U3O8 and UO3 samples. The samples were aged over several years in chambers designed to control temperature and relative humidity. There are two primary focuses for analysis of these aged uranium oxides …
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The rate of decay of fresh fission products from a nuclear reactor
… reactor. The experiment exposed 0.5 grams of U3O8 to a fast and thermal neutron flux from a TRIGA Research Reactor (Lakewood, CO) for ten minutes. The dose rate from the fission products was measured by four Mirion DMC 2000XB electronic personal dosimeters over a period of six days. The …
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Modeling energy consumption in the mining and milling of uranium
… energy consumption in the production of U3O8. The models are applied to a considerably larger data set of operating mines than in any previous effort. In addition, the validity of the modeling approach is established by modeling energy for two other commodities, gold and copper, thereby …
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Design and implementation of an automated gamma probe for jet boring uranium mining.
… and achieve conversion of gamma counts into U3O8 grade. Cigar Lake is the second highest known grade uranium mine in the world. The mine is located in northern Saskatchewan, Canada. Project engineers during the 2000 JBS proof-of-concept tests suggested that jetting parameters for extracting …
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Characterization of Uranium and Rare Earth Element Mobility and Attenuation Downstream of Decommissioned Tailings Impoundments at the Bicroft Mine near Bancroft, Ontario
… 1957 to 1963, and processed low-grade (~0.17 wt% U3O8), disseminated U hosted by pegmatite dykes in amphibolite gneiss, forming 2,284,421 tonnes of tailings, deposited into two tailings impoundments. The Bicroft site has since operated as a passively attenuating stream and wetland remediation …
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The behavior of uranium in the environment : bacterial reduction of an aqueous uranium species
… visible characteristics of both UO2(s) and U3O8 (s). Electron microprobe showed a very small crystal formed by the bacteria, but was inconclusive with respect to the elemental composition of the mineral. The XRD spectra determined that precipitate was uranium dioxide U02(s). The …
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Separation and Coordination Chemistry of Actinides
… are the structures containing mixed-valent U3O8 layers generated in situ in chapter II, and the structure containing a cation-cation interaction highlighted in chapter IV. Both of these topologies have unique aspects, the first in the method of generation, and the second for its presence in …