[2G13-17] Stabilization and Immobilization 2

[2G15] Challenge of Novel Hybrid-waste-solidification of Mobile Nuclei Generated in Fukushima Nuclear Power Station and Establishment of Rational Disposal Concept and its Safety Assessment

(8) Development of rapid fabrication of synroc based waste-solidification using the Spark Plasma Sintering(SPS) method

*Satofumi MARUYAMA¹, Satoshi NOMURA¹, Ryosuke MAKI², Masahiko NAKASE³, Shinta WATANABE³, Hidetoshi KIKUNAGA⁴, Miki HARIGAI⁵, Tomofumi SAKURAGI⁵, Ryo HAMADA⁵, Hidekazu ASANO⁵ (1. TCU, 2. OUS, 3. Tokyo Tech, 4. Tohoku Univ., 5. RWMC)

Keywords:Fukushima Daiichi nuclear power station accident , Waste management , Hybrid waste form, Synroc, Spark plasma sintering

This study focused on the Spark plasma sintering (SPS) method as the rapid and low-temperature solidification method for fabricating synroc-based waste-solidification. The SPS method directly applies the electrical field to materials with uniaxial pressure. The reaction behavior differs from the conventional synthesis in an electric furnace. Especially, the solidification and densification temperatures are significantly decreasing. In this study, we applied the SPS method to fabricate titanates, one of the synrocs, and investigated the solidification behavior during SPS.