I always thought that the Lucifer's reactors were Meson reactors, since they bare some resemblance to the Meson bomb. If you think about it, Shivans make meson reactors to power the Lucifer, GTI manage to copy the principles of such a reactor and builds a prototype aboard the Einstein, Einstein goes boom but a portion of its plans are salvaged by escape pods and after the Hades rebellion is crushed, their research is shelved for many years until it is dusted off and resumed by GTVA during NTF rebellion. GTVA then succeeds in the creation of a Meson detonation device, but they are nowhere near as advanced as the Shivans' ones. This is evidenced by the fact that it took the Lucifer's 5 reactors blowing to collapse the Sol-Delta Serpentis jumpnode, while it took quite a number of the GTVA's meson bombs in a gutted Orion to seal the Capella-Epsilon Pegasi jumpnode. That's my theory.