About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Special Topics in Nuclear Materials: Reproducibility and Uncertainty; Hydrogen Effects; Space and Microreactor Systems
|
| Presentation Title |
Density Functional Theory Analysis of Candidate Tritium Permeation Barriers for Vanadium Alloys as a Fusion Structural Material |
| Author(s) |
Anne Davis, Mary Alice Cusentino |
| On-Site Speaker (Planned) |
Anne Davis |
| Abstract Scope |
Vanadium is being considered as a blanket structural material for fusion reactors due to its low activation, high thermal stress factor, and good compatibility with liquid lithium. However, vanadium has a high hydrogen solubility which will require a tritium permeation barrier (TPB) to prevent hydrogen from diffusing into the structural material and maintain a high tritium breeding ratio. Candidate permeation barriers include metals, oxides, nitrides, and carbides. To determine which candidate materials would be most viable as a TPM we will perform a series of density functional theory (DFT) calculations of hydrogen properties in these materials. We will determine the hydrogen solution energy, migration barriers, and adsorption energies for candidate TPB materials and report on materials that will best reduce hydrogen diffusion into the vanadium structural alloy. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |