About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Ceramics and Glasses for Nuclear Energy Applications
|
| Presentation Title |
Impact of MgO on Nepheline Crystallization in Sodium Aluminoborosilicate Glasses |
| Author(s) |
Lavleen Saini, Preeti Malviya, Ashutosh Goel, Libor Kobera |
| On-Site Speaker (Planned) |
Lavleen Saini |
| Abstract Scope |
The Hanford site in Washington State houses millions of gallons of high-level radioactive waste (HLW), designated for vitrification into a borosilicate glass waste form. However, upon cooling of the HLW glass melt, nepheline crystallization (NaAlSiO4) can occur, posing a significant challenge to the vitrification process by compromising the chemical durability of the resulting waste form. Consequently, extensive efforts have been made to understanding compositional factors influencing nepheline crystallization, which include concepts such as the optical basicity and ionic field strength. In this work, we will use these concepts as a tool to (1) understand the structural role of Mg in aluminoborosilicate glass system, followed by (2) it’s relation to the kinetics of nepheline crystallization. |