Current plan of J-PARC transmutation experimental facility

J-PARC核変換実験施設計画の現状

佐々 敏信   ; 大井川 宏之 

Sasa, Toshinobu; Oigawa, Hiroyuki

J-PARC計画で建設を予定している核変換実験施設は、臨界集合体と600MeV陽子ビームを受ける核破砕ターゲットを有する施設である。J-PARCの建設状況から、建設を2期に分割して臨界集合体と30kWビームダンプを先行して着手することとし、予備的な研究計画の募集を行った。ADS,先進高速炉,核データ,核物理,医学利用をはじめとする30を超える提案と100名を超える参加希望があった。これらの提案に沿うべく、実験施設設計の再検討に着手し、放射能の高いマイナーアクチニド燃料の利用やその燃料組成を検討するための感度解析を実施し、設備仕様の確定を進めた。

Construction of the Transmutation Experimental Facility which has a critical assembly and a lead-bismuth target is planned within the framework of J-PARC project. We are planning to install the critical assembly with a 30kW beam dump at the first phase and the target facility will be built at the latter phase. Based on this construction plan, JAEA collected the preliminary Letters Of Intent for TEF. More than 30 research programs by about one hundred researchers were proposed. The proposals spread over wide research fields such as innovative reactor concepts, nuclear data, medical application, and so on. According to these many valuable proposals, the re-arrangement of facility layout and the new experimental equipment design are now underway. One of the important R&Ds is to prepare for the application of minor actinide fuels to critical assembly. The development of the technology to handle the high-background minor actinide fuel is being performed. A sensitivity analysis was also performed to determine the efficient fuel composition.