My guess would be "quite a lot" and "probably, if her access panel was closed in time".DilyV wrote:My question is, how much radioactivity was released in this 'meltdown' and could Kath and Atsali have survived it inside of Bud's compartment?
This explosion was posited to be the result of a hot radioactive mass coming into contact with water in the surrounding strata, leading to a steam explosion. It would have required fairly direct contact between the fissioning uranium-laden rock (or lava) and the water, to have made that much steam in such a short period of time... the thermal conductivity of rock is probably too low for an indirect-heat-transfer scenario to have caused an explosion.
So, you have a steam explosion violently shattering the landscape, and probably shattering and carrying along a lot of the stimulated uranium ore as tephra fragments, full of uranium and (much worse) lots of yummy fission products. Think "significantly-radioactive pyroclastic flow" as you go to sleep tonight if you want interesting dreams
I would not care to be downwind.
As to Kath and Atsali surviving... we don't know much at all about the characteristics of golemite clay, but it must be incredibly tough and resilient stuff to give the GGs the survival/invulnerability they've been shown to have. It'd be quite plausible to me for it to act as a very effective barrier against gammas and neutrons and the like... if so, Bud's passengers may be quite safe if they got indoors in time. Bud may need surface decontamination, though... but since we know that Bud and Brandi's house has a perfectly good shower, that might suffice.
On the other hand, we may be facing a "No more living Anasazi at all, and a Kentucky-fried Siren" situation. I hope not! Can't tell yet.