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Development of the volume reduction treatment of solid waste system by ultra-high frequency induction furnace

超高周波溶融炉による廃棄物減容処理システムの開発

榊原 哲朗; 青山 佳男; 山口 大美; 佐々木 尚*; 西川 雄*; 村田 実*; Park, J.*; 谷口 尚司*; 藤田 満*; 福田 友幸*; 鈴木 洋*

Sakakibara, Tetsuro; Aoyama, Yoshio; Yamaguchi, Hiromi; Sasaki, Naoto*; Nishikawa, Takeshi*; Murata, Minoru*; Park, J.*; Taniguchi, Shoji*; Fujita, Michiru*; Fukuda, Tomoyuki*; Suzuki, Hiroshi*

放射性廃棄物の溶融減容処理において、廃棄物の詳細な分別が不要となる超高周波溶融炉による減容システムを開発した。るつぼ容量10リットルの小型試験装置と、容量30リットルの実証試験装置を用いて数10$$sim$$100kHzの電磁誘導により金属とセラミックスを同時に誘導加熱し溶融固化体を作製した。作製した固化体の健全性を確認するとともに、計算シミュレーションにより算出した炉内の電磁場と流動状況と試験結果とを比較評価した。また、試験データ及び計算評価結果からるつぼ容量100リットルの実用規模設備の設計を実施した。

The volume reduction treatment of solid waste system by ultra-high frequency induction furnace (UHFIF) was developed from FY2005 to FY2007. Basic data for melting performance were collected by non-radioactive experiments using the bench scale UHFIF with a crucible capacity of 10 liters. Based on the obtained data, engineering specifications were evaluated for a demonstration scale UHFIF with a crucible capacity of 30 liters. A new demonstration scale UHFIF was constructed and melting experiments of surrogate wastes were carried out by this furnace. It was confirmed that the demonstration scale UHFIF can melt ferrous metal, ceramics and aluminum all together and stabilize aluminum by oxidation to alumina. Density, chemical composition, and surface condition of the solidified substances were analyzed, and homogeneity of the solidified substances was confirmed. Melting behavior in the demonstration scale UHFIF was analyzed by computer simulation and simulation results agreed well with the experimental ones. From the design study for a full scale UHFIF with a crucible capacity of 100 liters, basic specifications were evaluated for the full scale UHFIF. Based on the obtained specification, melting behavior in the full scale UHFIF was analyzed by computer simulation.

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