Radionuclide Migration as a Function of Mineralogyby Inés R. Triay, Los Alamos Natl Lab, Los Angeles, United States,
Alan J. Mitchell, Los Alamos Natl Lab, Los Angeles, United States,
Martin A. Ott, Los Alamos Natl Lab, Los Angeles, United States,
Abstract: The migration of radionuclides is studied as a function of mineralogy utilizing batch sorption and column experiments. The transport behavior of alkaline, alkaline-earth, and transition metals and actinide species is studied in pure mineral separates. The solid phases utilized for these investigations are silicates, alumino-silicates, carbonates, and metal oxides and oxyhydroxides. The results of this effort are utilized to aid in the elucidation of the dominant chemical mechanisms of radionuclide migration; the prediction of radionuclide transport in conditions similar to those expected at the candidate high-level nuclear waste repository site at Yucca Mountain, Nevada; and the identification of materials that act as natural geological barriers or that can be utilized as strong sorbers in engineered barriers.
Subject Headings: Radioactive materials | Radioactive wastes | Chemical wastes | Recycling | Geology | Sorption | Alkalinity | Columns | Nevada | North America | United States
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