Hello
please, add to config:

• explosion power
• explosion chance
• stability of reactors or used materials (maybe)

it makes working with reactors little harder and more interesting

Certainly very possible, but what do you mean by 'explosion chance'?

chance to explosin when is reactor unstable or hot....
to make it not explode everytime on same situation.. to make it more unpredictable
maybe reactor failure.. to make it explode anyway :D (this will be perfect with radiation :D )

Well, the thing is that there's a very definite heat bar in the GUI to warn when the explosion will occur, so I don't see why there should be a chance to explode.
Anyway, I'll add a config to change the reactor's explosion radius.