Talk:Nuclear Reactor/@comment-30138270-20161004102038/@comment-28851543-20171230175543

The issue with a self-sustained fusion-fission reactor is that you can only generate nuclear energy by moivng the atomic number of atoms closer to 26 (Fe, iron). Fission reduces the atomic number and therefore is exothermic if you have more protons than iron but is endothermic if you have less. Fusion is exothermic below iron but endothermic above iron. Basically everyone wants to be iron.