Impacts of Small Column Ion Exchange Streams on DWPF Glass Formulation: KT08, KT09, and KT10-Series Glass Compositions

摘要

This report is the fourth in a series of studies of the impacts of the addition of Crystalline Silicotitanate (CST) and Monosodium Titanate (MST) from the Small Column Ion Exchange (SCIX) process on the Defense Waste Processing Facility (DWPF) glass waste form and the applicability of the DWPF process control models. MST from the Salt Waste Processing Facility (SWPF) is also considered in the study. The KT08-series of glasses was designed to evaluate any impacts of the inclusion of uranium and thorium in glasses containing the SCIX components. The KT09-series of glasses was designed to study the effect of increasing Al(sub 2)O(sub 3) and K(sub 2)O concentrations on the propensity for crystallization of titanium containing phases in high TiO(sub 2) concentration glasses. Earlier work on the KT05-series glasses recommended that the impact of these two components be studied further. Increased Al(sub 2)O(sub 3) concentrations have been shown to improve the properties and performance of high waste loading glasses, and K(sub 2)O has been reported to improve the retention of TiO(sub 2) in silicate glasses. The KT10-series of compositions was designed to evaluate any impacts of the SCIX components at concentrations 50% higher than currently projected.