Design of J-PARC Transmutation Experimental Facility

• JAEA proposes Transmutation Experimental Facility in J-PARC to perform ADS study.
• Experiments using Lead–Bismuth spallation target and MA-bearing fuel are planned to use.
• Reference parameters for heavy irradiation in spallation target is specified.

After the Fukushima accident, nuclear transmutation got much interested as an effective option of nuclear waste management. Japan Atomic Energy Agency (JAEA) proposes the transmutation of minor actinides by accelerator-driven system (ADS) using lead–bismuth eutectic alloy (Pb–Bi) as a spallation target and a coolant of subcritical core. Current design of ADS has 800 MWth of rated power, which is driven by 20 MW proton LINAC, to transmute minor actinides generated from 10 units of standard Light Water Reactors. To obtain the data required for ADS design, JAEA plans to build a Transmutation Experimental Facility (TEF) in J-PARC. TEF consists of two buildings, one is an ADS target test facility (TEF-T), which will be installed Pb–Bi spallation target, and the other is Transmutation Physics Experimental Facility (TEF-P), which set up a fast critical/subcritical assembly. TEF will be located at the end of 400 MeV LINAC of J-PARC and accepts 250 kW proton beam. The paper describes an outline of TEF and design of spallation target.