Characterisation of secondary products of uranium–aluminium material test reactor fuel element corrosion in repository-relevant brine

Corrosion experiments with non-irradiated uranium–aluminium fuel elements were performed in MgCl2-rich brine. Distribution analysis of corroded material showed that about 90% of the initially available metallic U and Al precipitated. Investigations of these secondary corrosion products provided that one component is a Mg–Al–Cl–hydrotalcite.