Results 11 to 20 of about 5,293 (211)
Geophysical Monograph Series, Page 305-323., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Brian Kendall +2 more
wiley +6 more sources
Chemical State of Complex Uranium Oxides [PDF]
Physical Review Letters, 2013 We report here the first direct observation of U(V) in uranium binary oxides and analyze the gradual conversion of the U oxidation state in the mixed uranium systems. Our finding clarifies previous contradicting results and provides important input for the geological disposal of spent fuel, recycling applications and chemistry of uranium species.
Kvashnina, K. O. +3 more
openaire +3 more sources
Ядерна фізика та енергетика, 2019 Using the X-ray diffraction method, the phase content of brown ceramics of lava-like fuel-containing materials of the “New Safe Confinement – Shelter Object” Complex was investigated.
S. V. Gabielkov +6 more
doaj +1 more source
Oxidation of Uranium Dioxide [PDF]
Journal of Nuclear Science and Technology, 1974 The oxidation of UO2 was studied by thermogravimetry and X-ray diffraction. It was clarified that the thermal history covering the first stage of the oxidation from UO2 to U3O UO7 significantly influenced the rate of the oxidation of the second stage from U3O7 to U3 O8.
OHASHI, Hiroshi +2 more
openaire +1 more source
Modified Total Evaporation Method for Highly Precise Measurement of Uranium Isotopes Ratio [PDF]
Zhipu Xuebao, 2023 Thermal ionization mass spectrometry (TIMS) is a well-established instrumental technique for accurately analyzing isotopes of elements with low first ionization potential.
ZHANG Ji-long1 +8 more
doaj +1 more source
Adsorption Science & Technology, 2018 A composite of rice husk (RH), caustic soda and aluminium oxide was synthesized at 500°C. The activated carbon and amorphous silica dispersed over the aluminium oxide selectively adsorbed uranium in the presence of other elements. At equilibrium time 1 h,
W. M. Youssef, M. S. Hagag, A. H. Ali
doaj +1 more source
Cathodoluminescence of uranium oxides [PDF]
Journal of Luminescence, 1984 The cathodoluminescence of uranium oxide surfaces prepared in-situ from clean uranium exposed to dry oxygen was studied. The broad asymmetric peak observed at 470 nm is attributed to F-center excitation.
Winer, K., Colmenares, C., Wooten, F.
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Minimization of actinide waste by multi-recycling of thoriated fuels in the EPR reactor
EPJ Web of Conferences, 2012 The multi-recycling of innovative uranium/thorium oxide fuels for use in the European Pressurized water Reactor (EPR) has been investigated. If increasing quantities of 238U, the fertile isotope in standard UO2 fuel, are replaced by 232Th, then a greater
Nuttin A. +8 more
doaj +1 more source
Nuclear Fuel Cycle Front End Chemistry
CHIMIA, 2005 A broad description of the main chemical processes involved at each main step of the nuclear fuel cycle, from uranium mining to nuclear grade uranium oxide preparation for nuclear fuel fabrication is provided.
Patrick Blanpain +2 more
doaj +1 more source
The oxidation of uranium tetrachloride
Journal of Inorganic and Nuclear Chemistry, 1966 Abstract The oxidation of uranium tetrachloride was investigated by thermo-analytical and X-ray diffraction methods. It proceeds in the presence of oxygen at atmospheric pressure via uranyl chloride (UO2Cl2) as an intermediate product: UCl 4 + O 2 → UO 2 2 Cl 2 + CL 2 3 UO 2 Cl 2 + O 2
Kanellakopulos, B., Parthey, H.
openaire +3 more sources