Study for 228~Th reduction in thermal reactor with Th-U fuel cycles

摘要

By using computer code WIMS/CENDL, the effects of some parameters, core configuration such as fuel element structure, neutron flux and bnrnup, are discussed in this paper. It is shown that high neutron flux, small fuel rod diameter, large volume ratio of coolant to fuel, seed-blank heterogeneous core arrangement and 23l~Pa chemical separation are necessary for reducing 228~Th production in reactor.