|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Sodalite-Based Forms for Wastes Containing Actinides and Halides
||Eric Vance, Joel Davis, Kylie Olufson
|On-Site Speaker (Planned)
Sodalite-based glass-ceramics targeted towards Pu/Am and halide-bearing wastes at the Atomic Weapons Establishment in the UK were prepared by sol-gel methods, followed by calcination and hot isostatic pressing in stainless steel cans at 900°C/100MPa. Ce and La were used to simulate Pu and Am respectively. The ceramics were dense and passed regulatory leach tests, and were characterised in detail by scanning electron microscopy and X-ray diffraction. The phase constitutions of sintered materials were similar to those of the hot isostatically prepared solids. While PuO2 formed as a separate phase, it is argued that PuO2 would also likely form in apatite-based glass-ceramics. Other ceramics targeted at pyroprocessing wastes in general were similarly prepared and characterised.