An auto-catalytic mechanism to explain the fission gas release between 500°c and 800°c on UO$_2$ irradiated fuel
Résumé
A new mechanism is proposed to explain the FGR by burst in the nuclear fuel. A simplified two-parameter model for describing aggregation kinetics can be borrowed from the Finke-Watzky mechanism. The comparisons between the model and annealing tests show a good agreement. This FGR mechanism is possibly connected to the defects concentration created by alpha self-irradiation. It's necessary to complete this investigation with other trials using model materials to validate this possible phenomenon.
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