| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Radiation Enhanced Diffusion (RED) and the Coupled Effects of Irradiation and Corrosion in Fe2O3 |
| Author(s) |
Kayla H. Yano, Aaron A. Kohnert, Amitava Banerjee, Danny J. Edwards, Edward F. Holby, Tiffany C. Kaspar, Hyosim Kim, Sandra D. Taylor, Yongqiang Wang, Blas P. Uberuaga, Daniel K. Schreiber |
| On-Site Speaker (Planned) |
Blas P. Uberuaga |
| Abstract Scope |
The extreme environments present in a nuclear reactor do not occur in isolation – they are often coupled. In particular, the defects produced by irradiation have the potential of changing the rates and even mechanisms of corrosion. Here, we examine radiation-enhanced transport in a model oxide – Fe2O3 – and use that insight to develop a model of coupled irradiation and corrosion. Fe2O3 films with isotopic tracer layers are deposited, irradiated with ion beams, and characterized via atom probe tomography to determine the extent of RED. These results are compared to an atomistically-informed mesoscale model of transport to identify mechanisms responsible for RED. Once validated, the model is used to explore the potential impact of irradiation on the corrosive growth of Fe2O3 scales. We find that irradiation can increase growth rates by orders of magnitude and that the growth rate becomes non-monotonic with thickness, a consequence of different regimes of radiation damage evolution. |
| Proceedings Inclusion? |
Undecided |