We propose a model describing the HBS formation and the progressive intra-granular xenon depletion in UO2. The HBS formation is modeled employing the Kolmogorov-Johnson-Mehl-Avrami (KJMA) formalism for phase transformations, which has been fitted to experimental data on the restructured volumetric fraction as a function of the local effective burnup. To this end, we employed available experimental data and novel data extracted in this work. The HBS formation model is coupled to a description of the intra-granular fission gas behavior, allowing to estimate the evolution of the retained xenon in order to consistently compute fission gas retention and its effect on the fuel matrix swelling.
The satisfactory agreement of the model predictions to experimental data and state-of-the-art models’ results, in terms of both xenon depletion and fuel matrix swelling as a function of the local burnup, paves the way to the inclusion of the model in fuel performance codes.
BARANI Tommaso;
PIZZOCRI Davide;
CAPPIA Fabiola;
LUZZI Lelio;
PASTORE Giovanni;
VAN UFFELEN Paul;
2020-07-14
ELSEVIER SCIENCE BV
JRC119553
0022-3115 (online),
https://www.sciencedirect.com/science/article/pii/S002231152030427X?via%3Dihub,
https://publications.jrc.ec.europa.eu/repository/handle/JRC119553,
10.1016/j.jnucmat.2020.152296 (online),
This document is only visible at the Commission level.
You are not authorized to publish or distribute it outside the European Commission.
This is a public document. You can share this publication.
Additional supporting files
| File name | Description | File type | |
|---|
