Hmm… I seem to be able to reroute the power for some reason. I found the reactor room with about eight minutes left, but when I went to the grey boxes on the walls that said “Reroute power [E]” when pointed at and pressing [E], nothing happened. The doors reacted fine to [E] though, meaning it cannot be an input detection problem. Am I just missing a detail, something you need to do before you can reroute the power, that the game doesn’t in an obvious way tell me about?