gnu et al-

That yellow flash on the right side of Reactor Unit 3 may be a unique signature. The fact that the explosion was directed upward suggests that it was channeled in some way and its possible that the concrete structure of the spent fuel pool provided that focus and that the fuel itself exploded possibly triggered by an explosion of hydrogen gas. In Unit 1 containment building the blast was dispersed in all directions as the hydrogen exploded, indicating that the gas was more generally dispersed. Just my thoughts trying to piece this together.

I've sent an inquiry in to the Union of Concerned Scientists, attempting to break through their contact fire wall; donor inquiries are the primary options on the drop-down menu but my wife has been a supporting member for 30 years.

It's not clear to me from the video of the wreckage if any part of the spent fuel pool survived the explosion, and remember the fuel there was uniquely laced with Plutonium. Ugh!

Charley Noble