Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Assessment of three European fuel performance codes against the SUPERFACT-1 fast reactor irradiation experiment

  • Luzzi, L. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Barani, T. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Boer, B. (Studiecentrum voor Kernenergie (SCK.CEN)) ;
  • Cognini, L. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Nevo, A. Del (ENEA, FSN-ING-SIS, CR Brasimone) ;
  • Lainet, M. (Commissariat a l'Energie Atomique et aux Energies Alternatives, CEA DEC/SESC) ;
  • Lemehov, S. (Studiecentrum voor Kernenergie (SCK.CEN)) ;
  • Magni, A. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Marelle, V. (Commissariat a l'Energie Atomique et aux Energies Alternatives, CEA DEC/SESC) ;
  • Michel, B. (Commissariat a l'Energie Atomique et aux Energies Alternatives, CEA DEC/SESC) ;
  • Pizzocri, D. (Politecnico di Milano, Department of Energy, Nuclear Engineering Division) ;
  • Schubert, A. (European Commission, Joint Research Centre, Directorate for Nuclear Safety and Security) ;
  • Uffelen, P. Van (European Commission, Joint Research Centre, Directorate for Nuclear Safety and Security) ;
  • Bertolus, M. (Commissariat a l'Energie Atomique et aux Energies Alternatives, CEA DEC/SESC)
  • Received : 2020.12.11
  • Accepted : 2021.04.09
  • Published : 2021.10.25
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Abstract

The design phase and safety assessment of Generation IV liquid metal-cooled fast reactors calls for the improvement of fuel pin performance codes, in particular the enhancement of their predictive capabilities towards uranium-plutonium mixed oxide fuels and stainless-steel cladding under irradiation in fast reactor environments. To this end, the current capabilities of fuel performance codes must be critically assessed against experimental data from available irradiation experiments. This work is devoted to the assessment of three European fuel performance codes, namely GERMINAL, MACROS and TRANSURANUS, against the irradiation of two fuel pins selected from the SUPERFACT-1 experimental campaign. The pins are characterized by a low enrichment (~ 2 wt.%) of minor actinides (neptunium and americium) in the fuel, and by plutonium content and cladding material in line with design choices envisaged for liquid metal-cooled Generation IV reactor fuels. The predictions of the codes are compared to several experimental measurements, allowing the identification of the current code capabilities in predicting fuel restructuring, cladding deformation, redistribution of actinides and volatile fission products. The integral assessment against experimental data is complemented by a code-to-code benchmark focused on the evolution of quantities of engineering interest over time. The benchmark analysis points out the differences in the code predictions of fuel central temperature, fuel-cladding gap width, cladding outer radius, pin internal pressure and fission gas release and suggests potential modelling development paths towards an improved description of the fuel pin behaviour in fast reactor irradiation conditions.

Keywords

Acknowledgement

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

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