| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Thermodynamics of Materials in Extreme Environments
|
| Presentation Title |
Thermodynamics of An-Cl Complexes at High Temperature and Pressure |
| Author(s) |
Ping Yang, Xiaobin Zhang, Morgan Kelley, Jason Baker, Hakim Boukhalfa, Artaches Migdissov, Hongwu Xu |
| On-Site Speaker (Planned) |
Ping Yang |
| Abstract Scope |
Nuclear energy represents a critical means to ensure sustainable energy supplies and curb greenhouse gas emissions. However, the development of nuclear energy systems is still hampered by safety concerns associated with the handling, processing, and disposing of spent fuel and high-level waste. One leading candidate approach is the storage of spent fuel in geological repositories. The behavior of actinides in high P-T environments is a fundamental knowledge gap with little understanding of complexation and thermodynamics of 5f-elements at geothermal relevant P-T conditions of these proposed disposing facilities. In this talk, we will present the impact on the chemical species and their thermodynamics from the elevated temperature and pressure based on the first-principle methods. The predicted results were validated by experimental Raman and XAS measurements in a hydrothermal diamond-anvil cell. The close integration between theory and experiment is the key to push forward the understanding of f-element chemistry at hydrothermal conditions. |