GO back to the infected women thats next to it, then look at the corridor in front of her, after it there is a small gap in the right side of the corridor which will let you advance more
Also DO NOT use the repair kit you have on the broken generator thats at the other side of the way after you reach it, keep moving to the next destination as you need it for the main story
what if i used it on that? is the savegame now useless? i haven't seen anything else to repair either. but i ran around for like 2 hours looking for an alternative way to the power core.