|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Liquidus Temperature Studies for High Level Nuclear Waste Glasses
||Kevin Fox, Fabienne C Johnson, David K Peeler
|On-Site Speaker (Planned)
The Defense Waste Processing Facility at the Savannah River Site has been safely vitrifying nuclear waste for more than 15 years. Planned changes intended to increase the rate of waste cleanup include higher waste loadings in the glass, and the incorporation of resins from salt waste processing. These changes will impact the properties of the glass, including liquidus temperature. A predictive model for liquidus temperature is used to avoid crystallization in the glass melter. The compositional range of applicability for this model needs to be expanded, and the model may have to be modified due to the increased concentration of some components. Studies have been undertaken to collect the data needed for revising the model, using the recent ASTM isothermal liquidus temperature procedure. Noble metal fission products and the complex compositional nature of waste glass make the performance of these experiments and the interpretation of their results challenging.