About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Vacancy Engineering in Metals and Alloys
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| Presentation Title |
Vacancy and self-interstitial radiation defects in fusion power plant materials and their effect on reactor operation.
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| Author(s) |
Sergei L. Dudarev |
| On-Site Speaker (Planned) |
Sergei L. Dudarev |
| Abstract Scope |
Neutrons produced by the plasma in a fusion tokamak induce dramatic changes in the properties of structural materials. These changes are microscopic: neutrons initiate collision cascades, resulting in
the formation of stable localized distortions of atomic structure; these are the radiation defects. Vacancy defects have the density lower than the average density of the material. Including radiation defects in a full reactor model is highly challenging - ab initio methods provide accurate information about energies of defects, but information about tensorial relaxation volumes, entering finite element models, is scarce. Complex dislocation network configurations or phase inclusions present a greater challenge to simulations since these defects react to the macroscopic fields of stress and strain that they create, presenting a non-linear self-consistent problem. We review the mathematical methods for computing deformations generated by radiation defects, and their application to simulating changes on the scale of a full operating fusion device.
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| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Nuclear Materials, Mechanical Properties |