About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Challenges, Advances, and Applications
|
| Presentation Title |
Time-Temperature-Transformation Diagram Development for a Coupled-Operation Glass Composition with SWPF |
| Author(s) |
Matthew Page, Fabienne Johnson, Nicodemus Rod, Madison Hsieh |
| On-Site Speaker (Planned) |
Matthew Page |
| Abstract Scope |
The Defense Waste Processing Facility (DWPF) is currently immobilizing high-level liquid waste at the Savannah River Site (SRS). Sludge and effluents from H-Canyon and the Salt Waste Processing Facility (SWPF) are mixed with frit (a prefabricated glass), melting the slurry mix, and pouring the molten glass into stainless steel canisters to create the final waste form. The Department of Energy (DOE) has defined specific repository requirements which the DWPF canisters must meet. Because of this, the glass transition temperature (Tg) and a time-temperature-transformation (TTT) diagram must be provided for each new projected waste type. A simulated (non-radioactive) glass composition was fabricated and subjected to isothermal heat treatments at varying times and temperatures to determine potential impacts of crystallization on the chemical durability of the glass. |