Densification of magnesia-based inert matrix fuels using asbestos waste-derived materials as a sintering additive

Miwa, Shuhei  ; Osaka, Masahiko  ; Usuki, Toshiyuki ; Yano, Toyohiko*

We proposed a new concept for densification of minor actinides-containing inert matrix fuels by using asbestos waste-derived materials for the effective utilization of resources and protection of public safety. In this concept, magnesium silicates, which are mainly generated by the decomposition of asbestos in low temperature heat-treatment, are used as a sintering additive for the achievement of high density of magnesia-based inert matrix fuels at relatively low sintering temperature. In this study, preliminary fabrication tests of magnesia-based inert matrix fuels with magnesium silicates were carried out by using cerium oxides as a representative of minor actinides oxides.