Melting and draining tests on glass waste form for the immobilization of Cs, Sr, and rare-earth nuclides using a cold-crucible induction melting system

최정훈; 이병관; 이기락; 강현우; 엄현진; 박환서

doi:https://doi.org/10.1016/j.net.2021.09.041

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자료유형: 학술저널

저자정보: 최정훈 (한국원자력연구원) 이병관 (한국원자력연구원) 이기락 (한국원자력연구원) 강현우 (한국원자력연구원) 엄현진 (한국원자력연구원) 박환서 (한국원자력연구원)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제4호

발행연도: 2022.4

수록면: 1,206 - 1,212 (7page)

DOI: https://doi.org/10.1016/j.net.2021.09.041

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Cold-crucible induction melting (CCIM) technology has been intensively studied as an advanced vitrification process for the immobilization of highly radioactive waste. This technology uses high-frequencyinduction to melt a glass matrix and waste, while the outer surface of the crucible is water-cooled,resulting in the formation of a frozen glass layer (skull). In this study, for the fabrication of borosilicate glass waste form, CCIM operation test with 60 kg of glass per batch was conducted using surrogatewastes composed of Cs, Sr, and Nd as a representative of highly radioactive nuclides generated duringspent nuclear fuel management. A 60 kg-scale glass waste form was successfully fabricated throughmelting and draining processes using a CCIM system, and its physicochemical properties were analyzed. In particular, to enhance the controllability and reliability of the draining process, an air-cooling draincontrol method that can control draining through air-cooling near drain holes was developed, and itsvalidity for draining control was verified. The method can offer controllability on various draining processes, such as molten salt or molten metal draining processes, and can be applied to a process requiringhigh throughput draining

#Cold-crucible induction melting #CCIM #Glass waste form #Immobilization #Vitrification #Highly radioactive waste #Glass melt draining

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