Go all the way to the top of facility and go outside. You should see these to long poles sticking out with blinking lights at the end. Go near the edge and look down. You should see a pipe extend and blow steam out. Jump down to the pipe, and go in the hole. You have to move quickly before it blows again. You end up under the room where the tram gets radiated. Quickly cut all for power conduits, this lowers the field protecting the reactor. Destroy the reactor. Ride the elevator up and hop on top of the next tram that goes by. The room is no longer dangerous. Hope that helps.
<< I'm stuck in the mining facility. I've gone through it, I THINK, and there is the electrified "walkway" or whatever it is that leads into nothing, and there is the little place where the floating "cars" go into and it gets red in the room and will kill you, etc. Where the hell to I go?? I've been wandering for 20 minutes! >>