| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Ceramics for a New Generation of Nuclear Energy Systems and Applications
|
| Presentation Title |
Cluster Dynamics Simulations of Point Defects and Fission Gas Evolution in Irradiated Ceramic Nuclear Fuels |
| Author(s) |
David Andersson, Christopher Matthews, Jason Rizk, Romain Perriot, Michael Cooper, Benjamin Liu, Christopher Stanek |
| On-Site Speaker (Planned) |
David Andersson |
| Abstract Scope |
Point defect evolution under irradiation influences important nuclear fuel performance characteristics such as fission gas evolution and dislocation growth. The Centipede cluster dynamics code, based on the MOOSE framework, was developed to simulate these processes, specifically targeting the known sensitivity to oxygen non-stoichiometry and complex defect clusters in UO2 based fuels, which has since been extended to U3Si2 and UN fuels. The cluster dynamics models require a large set of parameters as input, which are derived from atomic scale simulations. The results from the Centipede cluster dynamics simulations are analyzed in terms of parameter uncertainty and the need for limited parameter calibration will be discussed. Finally, application of defect and fission gas diffusion models in engineering scale fuel performance analysis is discussed. |