I would be very surprised taht this could take direct hits. Russia certainly knows that such exists and would make efforts to bomb, wait 20 minutes, bomb, wait 20 minutes, bomb, wait 20 minutes, etc, knowing how much concrete and steel each bomb would burn through.
My bet is that Alaska would be the best place to be. There are certainly going to be bombs at the bases there, but the state is so huge that it would be very difficult to hit the whole thing.
Fallout is going to be a bitch anywhere you go.
The regime has signed on to purchase hundreds of millions of IV treatments for radiation sickness, and has stock piled Iodine tablets for decades.