Chemistry of Actinides in Molten Glasses and Its Correlation to Structural Performance of Solid Glasses: Filling the Knowledge Gap (Project 81926).

Dai, S. ; Boatner, L. ; Schumacher, R. F.

Technical Information Center Oak Ridge Tennessee

关键词: Actinides;    Uranium compounds;    Spectroscopy;    Molten glass;    Borosilicate glass;   

RP-ID  :  DE2005839073

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

This proposal focuses on the following basic objectives to generate critical information for the following research Needs: (a) to conduct spectroscopic speciation of uranium compounds in glass-forming melts as a function of the acid-base composition of the glasses and melt temperatures, and to use these data to develop a general thermodynamic model for the dissolution of actinide species in oxidic glass matrices, (b ) to build a scientific basis for a new methodology to measure the basicity of glasses via optical spectra of in-situ immobilized actinides and to use this optical basicity as a primary actinide structure indicator for solid glass matrices, (c) to define the local environment of actinides in solid glasses via fluorescence lifetime distribution methods, (d) to correlate the above spectral fingerprints of actinides in solid and molten glasses with glass stability and the leaching rates of individual actinide species from a glass matrix. This report summarizes the work accomplished during the second half of a three-year project.