[ExcelSaga]

It is very unclean, especially since it requires conventional fission reactors to produce the tritium. It’s theoretically possibl to breed tritium in the reactor blanket of the fusion reactor, but that’s a totally unsolved problem. The high neutron flux of the D-T reaction also destroys all known materials in short order by disrupting the atomic structure of the materials through atomic spallation. There are plenty of other hurdles to making a fusion power plant as oppposed to just a research reactor, but those are big ones.