What about now?
For the blast, you can just go to a good shelter.
For the radiation, not even a shelter will save you from radiation. You'll be exposed to AT LEAST a little bit, and if you are already exposed to that little bit and accidentally eat the wrong part of the food you're dead. Trying to survive is pointless imo, there will be nothing left when you open the door.
The radiation symptoms scare me, you'll get beta burns on contact and the gamma rays will burn you alive from the inside out until you are paralyzed. You can also go blind, and if you do you can't commit Self Delete because you can't see anything. SO, you just lay there on your burns, bleeding and crapping diarrhea perpetually... until you die. All the while it's raining lethal black soot that also burns on contact :/
Sorry bout that, I probably ruined someone's weekend. But at least now you know.