Immobilization of Radioactive Wastes into CaTiO₃ Synroc by the SHS Method

Abstract:

This paper researched the fabrication of perovskite (CaTiO3) synroc by self-propagating high temperature synthesis (SHS) and the characterization of the products. This synthesis process is simpler, the fabricated synroc can immobilize waste loading up to wt( 35%) SrO with satisfied physical properties (density>4.2 g•cm-3, open porosity<0.2%). The microstructure analyses by XRD and SEM/EDS show that the major phase is perovskite which well agrees with the design. It proves that SHS offer a suitable Sr-waste synroc which is favorable for geological disposal.

• Periodical: Advanced Materials Research (Volumes 152-153)
• Pages: 315-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.152-153.315
• Online since: October 2010
• Authors: Rui Zhu Zhang, Da Kao Yan, Zhi Meng Guo
• Keywords: High-Level Radioactive Waste (HLW), Immobilisation, Mineral-Like Ceramics, Perovskite (CaTiO₃)

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