The low solubility of sulfate in silicate-based glasses, approximately 1 mass% as SO3, limits the loading of high-level waste (HLW) and low-activity waste (LAW) containing high concentrations of sulfur. Based on crucible melting studies, we have shown that the phosphate glasses may incorporate more than 5 mass% SO3; hence, the waste loading can be increased until another constraint is met, such as glass durability. A high-sulfate HLW glass has been formulated and tested to demonstrate the advantages of phosphate glasses. The effect of waste loading on the chemical durability of quenched and slow-cooled phosphate glasses was determined using the Product Consistency Test.
Revised: August 17, 2010 |
Published: October 31, 2002
Citation
Kim D., J.D. Vienna, P.R. Hrma, and N.J. Cassingham. 2002.Phosphate Glasses for Vitrification of Waste with High Sulfur Content. In Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries VIII; Proceedings: Ceramic Transactions, edited by SK Sundaram, DR Dpearing, JD Vienna, 143, 337-346. Westerville, Ohio:American Ceramic Society.PNNL-SA-37491.