INVESTIGATION OF RUTHENIUM DIOXIDE FORMATION MECHANISMS IN CONTAINMENT GLASS SYNTHESIZED BY LIQUID FEED

摘要

Highly-active liquid wastes arising from reprocessing of spent uranium oxide fuel are confined in a sodium borosilicate glass matrix in France and Japan. The complementarity of the scientific and methodological approaches developed in the two institutes, CEA, France and Nagoya University, Japan had allowed the cooperation program to mutually enrich their knowledge of the mechanisms of crystal formation of RuO_2 and its influences in the glass. The research topic will cover generic studies not related to a particular melter technology, but scientific and fundamental data. The presenting paper focuses on the structural configuration of ruthenium in vitreous matrices with the objective of obtaining more insight into ruthenium incorporation and solubilization mechanisms in borosilicate glasses.