New technology would be invented.
We would use another fuel.
your organs would die
it would miy
everything would die out.
If you ran out of water, that would be disastrous. Cellular functions require water to operate, so you would die.
we will use salt
you would be president.
it would be very dry
I would call an ambulance.
you would need to get some more
It would supernova.
Luckily, nuclear rectors are too large to be ran over by a tow truck. However, if one did get ran over by a tow truck, nothing would happen. The containment vessel is enormously strong, and the outer structure is even stronger, so no meltdown would happen.