This is ridiculous panic. They haven't cracked open the NSC or anything like that. It's just dust. Long lived radionuclides kicked into the air that emit alpha and beta radiation - practically harmless unless you're playing around in it like a sandpit. Please don't let your attention be diverted from the matter at hand.
Yeah, most people don't have a proper mental model of radiation - it tends to be discussed either as a virus, or as a poison. It's neither - it doesn't multiply, it is not transmissible, dilution works perfectly well; and as a bonus - it gets less dangerous on its own with time
