I was gonna post this last night, but the board was screwy. I posted this at the blog entry, and he replied.
Anyway…
His complaint isn’t technically incorrect, but seems to miss the point.
It’s the particulate matter that emits the radiation (or rather, things attached to/part of it). So the better you can seperate yourself from that particulate matter, the better off you’ll be.
If you use plastic sheeting to seal your house, then you go hide in the basement, if you’ve done a good job, you’re going to be 10+ feet and several walls/floors between you and the radiation emitting particles. In an unsealed house, the particles could make their way through the house, including the basement, so now you’re surrounded by them and breathing them in, which is a much bigger hazard.
The level of “ambient” radiation occuring in the days after a nuclear bomb are a bit overstated in popular culture. To my knowledge, just being in the general area of somewhere affected by moderate fallout, say, in a chem suit, isn’t quickly fatal. It’s ingesting the particles that’s the biggest hazard - through air, food, and water.
So, lacking a dedicated fallout shelter, trying to seal up your house would be a prudent thing to do.
This seems to tie into the general tendency of people to mock civil defense ideas. “Duck and cover” is brought up mockingly as a ridiculous notion when it’s actually quite practical.
It stems from the popular conception of nuclear war being a lot more destructive than what actual nuclear would be like. People just assume everyone is going to die, that we have enough nukes to destroy the world “7 times over” (utter nonsense), and that there’s no use in trying to survive.
The immediate kill zone (95%+ casualties) of a nuclear blast is relatively small. Much bigger is a zone where a relatively smaller number of people will be killed, depending on their circumstances and action. Sure - if a nuclear bomb goes off 10 feet from you, ducking and covering isn’t going to be an option. But if you’re, say, 10 miles away from a 1MT blast? In that case, indoors, you (probably) won’t be killed by the immediate effects of the bomb. However, the blast wave created will propogate out that far (in limited strength) - and a big immediate danger is going to be flying glass. So what do you do to avoid being killed by flying glass? Duck and cover. It could easily make the difference between life and survival for some people.