An overview of the multi-scale modelling activities at ITU and their integration in the TRANSURANUS fuel performance code

This paper will present the modelling activities at various scales carried out and planned at ITU for the development of the TRANSURANUS fuel performance code. More precisely, the electronic scale calculations to be used for improving the fuel performance code are outlined. These calculations deal with the formation energies of point defects, the incorporation energies of fission products as well as their migration energies, and the elastic constants for nitride fuels. In addition four models developed at meso-scopic scale will be presented. The first model deals with the redistribution of the plutonium and oxygen in the FBR MOX fuels. The second model is for the plenum temperature during design basis accidents. The third model is for the bubble migration in the bulk of the material. The fourth model that deals with fuel melting is presented in greater detail separately. In addition to the outline of the models, the corresponding experimental work that was used for its development and validation is discussed.

WELLAND Michael;  KLIPFEL Marco;  DI MARCELLO Valentino;  SCHUBERT Arndt;  VAN DE LAAR Jacques;  PASTORE Giovanni; 

VAN UFFELEN Paul; 

2013-08-20

MMSNF organisation

JRC65891

http://www.mmsnf.org/Book_abstracts.pdf,    https://publications.jrc.ec.europa.eu/repository/handle/JRC65891,