Corrosion and fuel interaction with environment

Coordinated by Christine Gueneau, CEA (FR)

Experimental and modelling techniques will be coupled to :

• Investigate the thermodynamic properties of the irradiated MOX fuel containing the fission products caesium, molybdenum, tellurium and iodine. The aim is to model the formation of the layer called JOG (Joint Oxide Gaine), that forms by migration of these fission products from the centre to the periphery of the fuel pin under thermal gradient.
• Investigate the chemical compatibility between the MOX fuel and the steel cladding. The phase equilibria in the U‐Pu‐O‐Fe model system will be determined. The aim is to predict the phases that form at high temperature during a severe accident and to assess their margin to melting.