Sheras mysterious survival

So accepting the fact that Shera did for some reason survive the startup, which is not that problematic in my humble opinion, since there are more then one phase during startup of a rocket blah blah... (and how can a fuel tank explode anyway, there is no fire or spark in it unless there is a serious design flaw there ^^)
But my question is: How the hell did she survive the actual start of the rocket later in the game? She was apparently in a room next to the fuel tanks, wouldn't she get fried this time?
Also - if everyone kept the rocket ready to go and Shinra lost all interest - what kept them from just firing up the damn thing in all those years?


By the way - asking me to open up a new thread to discuss this while the same thread already existed just because before mentioned thread is six years old then closing the old thread is the very definition of spam. I don't understand the reasoning whatsoever.

Almost nothing in FF7 stands up to any logical scrutiny