8.2.1 Outline of TEF-T

For the JAEA-proposed ADS, Pb-Bi is a primary candidate of coolant and spall­ation target. To solve technical difficulties for Pb-Bi utilization, construction of TEF-T is planned to complete the data sets that are required for the design of ADS.

The experiments to obtain the material irradiation data for the beam window are the most important mission of TEF-T.

A high-power spallation target, which will be mainly used for material irradia­tion of candidate materials for a beam window of full-scale ADS, is an essential issue to realize a TEF-T. To set up the beam parameters, future ADS concepts are taken into account. In the reference case of the target, proton beam current density of 20 ^A/cm2, which equals the maximum beam current density of the JAEA — proposed 800 MWth ADS, was assumed.