Attempt has failed due to severe damage to electric infrastructure within the plant...in short, hooking up the electric to a blown-up building does not make blown-up and flooded equipment start working again.

Imagine: Huge thunderstorm, your basement floods, a tree falls, lands on your house, your house partly collapses into the basement, and the electric feed is pulled off the side of the house by the falling tree. Storm passes, now you're cold, so you jury-rig a cable to generator connect to the power lines that were connected to your house. Your oil burner won't function, no matter how much electric is there...
Now add high radiation at the site of pumps, increase the size of the cables needed to connect electricity to the point that you need heavy equipment just to MOVE the wire into place...now add the fact that there are no roads to drive the heavy equipment and the beach where you can park a generator is covered in 40' of smashed houses and dead bodies and it's 500 yards of water between the plant and the generator...