J-PARC Transmutation Experimental Facility Program

Sasa, Toshinobu   ; Obayashi, Hironari  ; Saito, Shigeru   ; Takei, Hayanori   ; Wan, T.; Kogawa, Hiroyuki  ; Nishihara, Kenji  ; Sugawara, Takanori  ; Iwamoto, Hiroki   

Japan Atomic Energy Agency (JAEA) proposes transmutation of minor actinides (MA) by an accelerator-driven system (ADS) using lead-bismuth eutectic (LBE) as a spallation target and a coolant. To obtain the data required for ADS design, JAEA plans to build a Transmutation Experimental Facility (TEF) within the framework of J-PARC project. TEF consists of two buildings, an ADS target test facility (TEF-T), in which a 400 MeV - 250 kW LBE spallation target will be installed, and a Transmutation Physics Experimental Facility (TEF-P), in which a MA-fuelledfast critical/subcritical assembly driven by low power proton beam will be set up. As a major research items of TEF-T, irradiation test for candidate ADS structural materials, engineering tests for LBE target operation and experiments to specify the effective lifetime of proton beam window will be performed. Secondary neutrons from the LBE target are possible to be used for multi-purpose application. The roadmap to establish the ADS transmutor and latest design activities for TEF construction will be summarized.