| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Impact of Soret Effect on Hydrogen and Helium Retention in PFC Tungsten Under ELM-Like Conditions |
| Author(s) |
Enrique Martinez Saez, Sanad Alturk, Jacob Jeffries, Muhammed Kose |
| On-Site Speaker (Planned) |
Enrique Martinez Saez |
| Abstract Scope |
We use nonequilibrium molecular-dynamics simulations to analyze the transport of helium and hydrogen in the presence of a thermal gradient in tungsten. We find that the resulting species flux is directed opposite to the heat flux, indicating that species transport is governed by a Soret effect characterized by a negative heat of transport. The findings of our thermal and mass transport analysis have been implemented in our cluster-dynamics code, Xolotl, which has been employed to compute temperature and species profiles over spatiotemporal scales representative of plasma-facing tungsten under typical reactor operating conditions, including plasma instabilities that induce edge localized modes. We demonstrate that the steady-state species profiles obtained accounting for the Soret effect vary significantly from those where temperature-gradient-driven transport is not accounted for and discuss the implications of such an effect on the response to plasma exposure of plasma-facing tungsten. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Nuclear Materials, High-Temperature Materials |