A COMPARATIVE-STUDY OF TRITIUM BREEDING PERFORMANCE OF LITHIUM, LI2O, AND LI7PB2 BLANKETS IN A TOKAMAK POWER-REACTOR

A nuclear analysis of tritium breeding performance has been carried out for three candidate breeding materials of liquid lithium, solid Li//2O, and solid Li//7Pb//2. The tritium breeding characteristic in each breeder material and the effects of graphite reflector and beryllium neutron multiplier are studied. The impact of the tritium breeding on the minimum blanket/shield thickness requirement for the TF-magnet protection is analyzed in detail. Discussions are made on space allowances for the nonbreeding inner blanket concept and major penetrations. The analysis of the characteristic neutron spectra in the three breeder materials, and the analysis of the effect of helium-coolant volumes in the solid Li//2O and Li//7Pb//2 compounds are presented.