Immobilization of Simulated High Level Nuclear Wastes with Li2O-CeO2-Fe2O3-P2O5 Glasses
نویسنده
چکیده
The leaching behavior and structure of Li2O-CeO2Fe2O3-P2O5 glasses incorporated with simulated high level nuclear wastes (HLW) were studied. The leach rates of gross and each constituent element were determined from the total weight loss of the specimen and the leachate analyses by inductively coupled argon plasma spectroscopy (ICP). The gross leach rate of the 4.5Li2O9.7CeO2-34.7Fe2O3-51.5P2O5 glass waste form containing 45 mass% simulated HLW is of the order of 10 5 g/cm·day at 90 ̊C, which is nearly equal as compared with the corresponding release from a currently used borosilicate glass waste form. The isolated ions such as monomeric (PO4) ions increase upon as increasing the incorporating amount of the simulated HLW. The changes in properties can be attributed to the structure changes owing to the incorporation of the simulated HLW. It was found that the Li2O-CeO2-Fe2O3-P2O5 glass works well as a matrix to solidify HLW. Keywords—FT-IR spectra, Leach rates, Li2O-CeO2-Fe2O3-P2O5 glasses, Nuclear waste immobilization, Thermal properties
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