About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Ceramic Materials for Nuclear Energy Systems
|
Presentation Title |
Corrosion Behavior of Nuclear Waste Glasses and Glass-Ceramics in Geological Repository Systems |
Author(s) |
James Neeway |
On-Site Speaker (Planned) |
James Neeway |
Abstract Scope |
Plans for the safe disposal of nuclear waste in a geologic repository generally involves direct disposal of the spent nuclear fuel (SNF) or treatment of the SNF through methods such as vitrification, where the unusable SNF fraction is immobilized in a glass or glass-ceramic waste form. In order to design and manage a secure disposal site, the waste form must limit the release of radioactive materials to the surrounding environment for very long time periods. To build technically defensible performance assessment models that are capable of predicting the release of radionuclides from the waste form in the repository environment, a mechanistic understanding of the glass-water interaction at different time periods is necessary. In this paper, we present the current understanding of the glass-water interaction and an overview of experimental and modeling approaches designed to elucidate various processes that may control glass corrosion at various time periods. |