About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Systems for the Future of Fusion Energy
|
Presentation Title |
Macroscopic Elastic Stress and Strain Produced by Irradiation |
Author(s) |
Luca Reali, Max Boleininger, Mark R. Glbert, Sergei L. Dudarev |
On-Site Speaker (Planned) |
Luca Reali |
Abstract Scope |
Fusion materials swell under neutron irradiation, which can result in significant stresses developing in reactor components. We propose a method for evaluating macroscopic stresses and deformations due to irradiation at the component scale of a fusion power plant. We use a multi-scale approach based on the concept of relaxation volume density, which we show is a particular case of the general notion of eigenstrain. This quantity can be obtained by atomistic modelling or derived from experiment, and implemented into finite element models, closing the length-scale gap. Several case studies illustrate applications of the method that show that the stress state depends primarily on the spatial variation of the neutron exposure. We discuss the radiation-induced stresses in ion-irradiated films, pressurised irradiated tubes, a vacuum vessel and a breeding blanket module. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Nuclear Materials, Other |