| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Corrosion Behavior in Advanced Nuclear Reactor Environments
|
| Presentation Title |
Mesoscale Modeling of Structural Alloy Corrosion in Molten Salt Reactor |
| Author(s) |
Xueyang Bognarova, Nathan Bieberdorf, Mark Asta, Laurent Capolungo |
| On-Site Speaker (Planned) |
Xueyang Bognarova |
| Abstract Scope |
The molten salt reactor is a promising technology due to its inherent safety features and higher temperature operation resulting in improved thermodynamic efficiency. Structural material corrosion by molten salt is a major concern. In this work, an electrochemical phase-field model has been proposed to investigate the corrosion mechanism of Ni-Cr alloy exposed to molten salt. The model contains an accurate thermodynamic description through leveraging molten salt database and electrochemical experiments including cyclic voltammetry. Corrosion by oxidants such as U ion, the valance state of Cr ion, and the influence of salt species are considered. Various electric charge assumptions and their effects on corrosion are examined, focusing on interfacial phenomenon. Vacancy supersaturation and long-range lattice diffusion induced subsurface-void formation have also been investigated. The study provides an insight into the rate-limiting corrosion step. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, |