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Precipitation and Crystallization Processes in Reprocessing, Plutonium Separation, Purification, and Finishing, Chemical Recovery, and Waste Treatment
Published in Reid A. Peterson, Engineering Separations Unit Operations for Nuclear Processing, 2019
Calvin H. Delegard, Reid A. Peterson
Uranium-based carriers triuranium octoxide (U3O8) and sodium uranate (Na2UO4) also coprecipitated Pu from alkaline solution (Krot et al. 1996; Peretrukhin et al. 1998). The U3O8 was generated by chemical reduction of solid sodium uranate (Na2UO4) using hydrazine and a catalyst and thus is not a homogeneous coprecipitation. The sodium diuranate used to capture Pu was produced from the soluble uranyl peroxide, [UO2(O2)3]4−, precursor upon its homogeneous decomposition by copper(II)-catalysis.
The Other Energy Markets
Published in Anco S. Blazev, Global Energy Market Trends, 2021
Yellowcake is a coarse powder which has a pungent odor, is insoluble in water and contains about 80% uranium oxide (U3O8), which melts at approximately 5212.4°F. It contains, among other things; uranyl hydroxide, uranyl sulfate, sodium para-uranate, and uranyl peroxide, and some uranium oxides.
Nuclear and Hydro Power
Published in Anco S. Blazev, Energy Security for The 21st Century, 2021
Yellowcake is a coarse powder which has a pungent odor, is insoluble in water and contains about 80% uranium oxide (U3O8), which melts at approximately 5212.4°F. It contains, among other things; uranyl hydroxide, uranyl sulfate, sodium para-uranate, and uranyl peroxide, and some uranium oxides.
Distribution of studtite and metastudtite generated on the surface of U3O8: application of Raman imaging technique to uranium compound
Published in Journal of Nuclear Science and Technology, 2021
Ryoji Kusaka, Yuta Kumagai, Takumi Yomogida, Masahide Takano, Masayuki Watanabe, Takayuki Sasaki, Daisuke Akiyama, Nobuaki Sato, Akira Kirishima
Studtite, [(UO2)(O2)(H2O)2](H2O)2, and metastudtite, (UO2)(O2)(H2O)2, which is the dehydrated form of studtite, are solid phases of uranyl peroxides and have been found in spent nuclear fuel exposed to water [1] and UO2 exposed to water under a radiation field [2]. The uranyl peroxides are formed through the reaction of UO2 with H2O2 generated by the radiolysis of water [3,4], although the mechanism that determine which uranyl peroxide phase is generated remains unclear. Because the nuclear fuel debris in the Fukushima-Daiichi nuclear power plants are in contact with coolant water under a high radiation field, the uranyl peroxides are likely ones of the dominant alteration phases of the fuel debris that could determine the properties of the fuel debris.