[2J01-04] Vitrification

[2J01] Vitrification of high-level nuclear wastes from high-burnup spent fuels by a new feeding process using glass powder pellets

*Tetsuji Yano¹, Nanako Ueda¹, Shintaro Matsumoto¹, Tetsuo Kishi¹, Kohei Owaku², Norio Kanehira² (1. Tokyo Institute of Technology, 2. Japan Nuclear Fuel Limited)

Keywords:High-burnup spent nuclear fuel, glass powder pellet, nuclear waste vitrification

High-burnup spent fuels from nuclear power plants are planned to be reprocessed and derived high-level nuclear waste solution (HLW) will be solidified using vitrification process. In this work, a new feeding process of glass matrix to dissolve HLW solution was investigated. Glass powder pellets are prepared for a new feeding form and expected to have high reactivity and high loading of HLW due to their high specific surface. Laboratory-scale melting tests have been performed to observe and evaluate their vitrification, especially in Cold cap layer. In the presentation, the feasibility of this new feeding process using glass powder pellets is discussed.