|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Sulfate Volatilization in Simulated Nuclear Waste Glasses
||Karen A. Bond, S. K. Sundaram, Kevin M. Fox, Jake Amoroso
|On-Site Speaker (Planned)
||Karen A. Bond
Sulfate present in nuclear wastes limits the amount of waste that can be immobilized (waste loading) in the glass waste form. This limit can be affected by the length of time the melt is held at a high temperature. This study has been undertaken to determine the volatilization of sulfur from the glass melt as a function of time, melt surface and volume. The baseline borosilicate glass system, including simulated nuclear waste components, was provided by the Savanna River National Laboratory (SRNL). The exact compositions are based on a previous study on additives to increase sulfur solubility; additives include barium, lead, and vanadium. Sulfur will be introduced into these glasses to target sulfur levels of 0.8 and 1.0 weight percent. The sulfate volatilization of these glasses will be determined by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) and other spectroscopic methods. Normalized volatilization rates will be presented.