[2G13-17] Stabilization and Immobilization 2

[2G14] 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

(7) Effect of solidification process on immobilization of radionuclides in hybrid waste

*Ryosuke Maki¹, Masahiko Nakase², Shinta Watanabe², Satofumi Maruyama³, Hidetoshi Kikunaga⁴, Tohru Kobayashi⁵, Tomofumi Sakuragi⁶, Ryo Hamada⁶, Miki Harigai⁶, Hidekazu Asano⁶ (1. Okayama University of Science, 2. Tokyo Institute of Technology, 3. Tokyo City University, 4. Tohoku University, 5. Japan Atomic Energy Agency, 6. Radioactive Waste Management Funding and Research Center)

Keywords:Fukushima Daiichi nuclear power station accident, Waste management, Hybrid waste form, Ceramics, Spark plasma sintering (SPS), Hot Isostatic Pressing (HIP)

The immobilization of the radionuclides produced in the decommissioning of Fukushima Daiichi nuclear power plant (1F) is a growing priority for waste management. We have fabricated the composite wasteform that consists of 10-30 % primary ceramic waste and a secondary ceramic/metallic matrix as a new concept for “hybrid waste solidification”. Here, we first evaluated the effect of spark plasma sintering (SPS) and hot isostatic pressing (HIP) precesses on the solidification of various wastes mainly for Fukushima decommissioning to add more insight into this field.