[2E10-12] 1F Waste 3

[2E11] 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

(12) Fabrication and comprehensive characterization of hybrid waste

*Ryosuke Maki¹, Masahiko Nakase², Hidetoshi Kikunaga³, Tohru Kobayashi⁴, Tomofumi Sakuragi⁵, Miki Harigai⁵, Shingo Tanaka⁵, Hidekazu Asano⁵, Satofumi Maruyama⁶ (1. Okayama Univ. Sci., 2. Tokyo Tech., 3. Tohoku Univ., 4. JAEA, 5. RWMC, 6. Tokyo City Univ.)

Keywords:Fukushima Daiichi nuclear power station accident, Waste management, Hybrid waste form, 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 evaluated the effect of spark plasma sintering (SPS) and hot isostatic pressing (HIP) precesses on the solidification of various primary ceramic waste. Appropriate matrix materials and fabrication processes were investigated from the viewpoints of long-term chemical stability, cost and suitability between matrix materials and primary wastes.