First of all, Final Vegeta is either pulling my leg or using a different definition of "plasma" from what physicists mean. Fire is just incandescent gas, or a rapid chemical reaction producing incandescent gas. Anyway, on to Nanashi's comments...
A bit vague here but I gather that the OT "thermonuclear reaction" is still a form of fusion power (i.e., releasing energy by fusing the nuclei of light elements to turn them into heavier elements). What makes it different from the kinds of fusion we know about is that it requires neither a solar mass nor a fission reaction to generate the heat and pressure necessary to cause atomic nuclei to fuse.
What does "not nuclear" mean? Do you mean, it doesn't need unstable isotopes of heavy elements?
What David said.
Thanks for the info, Nanashi. Where did the official info come from?
The fuel does not need to be nuclear.
http://www.anime.net/macross/story/encyclo...tion/index.html