Abstract
Recent work concerning the leaching behavior of nuclear waste forms is reviewed. Major emphasis is devoted to glass and glass-ceramics, and the five types of surfaces that determine the durability of these materials are discussed. An experimental approach is presented which enables one to predict the stability of glass and glass-ceramics waste forms exposed to a wide range of environments. The method is based upon a theoretical correlation of changes in thickness to leached layers and changes in solution pH with given changes in the ratio of surface area (SA) exposed to specific solution volumes (V). The validity of this method is tested by comparing results for a range of silicate glass compositions. The effects of glass homogeneity, crystallization, and contact with various geological materials on glass corrosion behavior are also examined.
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