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dh87 said:I thought that you might know, since you propounded a theory. In elektrownik's theory, the oxygen for the initial hydrogen explosion is in the building above the SFP. Then, the second fireball occurs above the building after the hydrogen released from the primary containment vessel has a chance to mix with atmospheric oxygen.
Sorry if that sounded dismissive. There were several in depth exchanges about the nitrogen atmosphere, leaking steam, displacement of the nitrogen, steam + zircaloy reactions, earthquake damage to the containment structure and the like. My initial proposal of an explosion was first refuted because of the nitrogen atmosphere (which I was unaware of at the time), but then the possibility of an explosion within the drywell containment was credibly explained by someone much more knowledgeable than I about such things. Regrets that I don't seem to retain the exact explanation, other than perhaps the notion that it might have occurred that way wasn't totally out of the question.
Speculative, yes, but none of it impossibly so, IMO. And there must be some physical explanation to "fit" the various pieces of visual evidence which led to my speculation and subsequent theory in the first place. But I haven't the energy just now, and it is certainly not my intent to attempt to summarize anything that might or might not have been agreed to in thousands of posts and hundreds of pages of observations and opinions only to initiate yet another rehash of what was already hashed and rehashed before. To the extent I may have already done that, I apologize.
The point is that the explosion at Bldg 3 was 1) unique, and 2) not necessarily explained only by a "nuclear" explosion in the SFP.