Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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On the intra-granular behaviour of a cocktail of inert gases in oxide nuclear fuel: Methodological recommendation for accelerated experimental investigation

  • Romano, M. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Pizzocri, D. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Luzzi, L. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division)
  • Received : 2021.08.04
  • Accepted : 2021.11.21
  • Published : 2022.05.25
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Abstract

Besides recent progresses in the physics-based modelling of fission gas and helium behaviour, the scarcity of experimental data concerning their combined behaviour (i.e., cocktail) hinders further model developments. For this reason, in this work, we propose a modelling methodology aimed at providing recommendations for accelerated experimental investigations. By exploring a wide range of annealing temperatures and cocktail compositions with a physics-based modelling approach we identify the most interesting conditions to be targeted by future experiments. To corroborate the recommendations arising from the proposed methodology, we include a sensitivity analysis quantifying the impact of the model parameters on fission gas and helium release, in conditions representative of high and low burnup.

Keywords

Acknowledgement

This work has received funding from the Euratom research and training programme 2019-2020 under grant agreement No 945077 (PATRICIA Project) and from the Euratom research and training programme 2014-2018 through the INSPYRE Project under grant agreement No 754329.

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