From all my reading it seems as though we will not need to die of radiation fallout if we watch the winds and the levels and stay inside on days of high readings. problem is, how long and how many days will that be?
the long term real problem is the food chain. how will we know what to eat/not eat in weeks and months,years to come? and WATER?
I'd stock up on canned goods and bottled water.
make sure you can seal your home.
guard the children carefully as they will be suseptable.