POTENTIAL OF INCINERATION OF LONG-LIFE FISSION PRODUCTS FROM FISSION ENERGY SYSTEM BY D-T AND D-D FUSION REACTORS

摘要

The incineration of LLFPs, all of which can not be incinerated with only the fast reactorrnwithout isotope separation is studied by employing the DT and DD fusion reactors. Thernrequirement of production of tritium for the DT reactor is severe and the thickness of thernblanket should be decreased considerably to incinerate the considerable amount of LLFPs. Onrnthe other hand the DD fusion reactor is free from the neutron economy constraint and canrnincinerate all LLFPs. The pure DD reactor can also show the excellent performance to reducernthe first wall loading less than 1 MW/m~2 even for total LLFP incineration. By raising the wallrnloading to the design limit, the D-D reactor can incinerate the LLFPs from several fast reactors.rnWhen the fusion reactor is utilized as an energy producer, plasma confinement is very difficultrnproblem, especially for the D-D reactor compared to the D-T reactor. However, when it isrnutilized as an incinerator of LLFP, this problem becomes considerably easier. Therefore, thernincineration of LLFP is considered as an attractive subject for the D-D reactor.