BTW, it looks like my speculation in another forum that the big radiation release could have been from the #4 pool may be wrong: “Authorities said much of the high-level radiation leaked from reactor 2 on March 15 and 16, early in the accident. Abnormalities in the reactor’s suppression pool caused the radiation release, the Japan Nuclear Safety Commission said. Radiation continues to leak from the suppression pool, the commission said, but the volume has dropped considerably.”
Reactor 2 is the one that didn’t have its building blow up, because it didn’t have high reactor pressure that had to be vented, and it has been assumed that it had a breach in the suppression pool. This is further indication of such a breach.
Here is what an EXPERT..yes EXPERT..who helped design the reactor at Fukushima had to say about this whole incident.
Could it have been avoided...Seems likely
http://www.examiner.com/wilderness-photography-in-eugene/fukushima-the-path-not-taken-1
http://www.examiner.com/wilderness-photography-in-eugene/fukushima-one-path-to-success
http://www.examiner.com/wilderness-photography-in-eugene/fukushima-engineer-oregon