| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Calculation of Irradiation Enhanced Diffusivities Using Centipede |
| Author(s) |
Christopher Matthews, Michael WD Cooper, Romain Perriot, Christopher R Stanek, David Andersson |
| On-Site Speaker (Planned) |
David Andersson |
| Abstract Scope |
The transport of defects in the supersaturated defect environment in irradiated nuclear fuel drives much of the important performance aspects of nuclear fuel. Calculations of defects have traditionally relied on rate theory to estimate defect concentrations to provide meaningful information to fuel performance simulations, albeit with limited scope, and subsequently, poor comparison to experimental measurements. Led by early indications that larger clusters could enable enhanced fission gas diffusion during irradiation, the cluster dynamics code Centipede has been developed to incorporate the hundreds of defects that must be tracked in order to account for the impact of large defect clusters. Through the utilization of an extensive database of atomistic calculations, the mechanistically calculated irradiation enhancement of fission gas in UO2 has been shown to compare favorably with experimental measurements. Centipede has been further refined using machine learning and has been applied to advanced fuels for which data is absent. |
| Proceedings Inclusion? |
Undecided |