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Worse that is three mile island. for one thing there's three reactors involved. they're a lot smaller and less capable. they have had to vent a considerable amount of reactivity, so there's been a great deal more release. >> chernobyl was insanity because they didn't even have a containment structure. what happens if there is a meltdown? . in terms of spectacular energetic events, none of these reactors will be anything lying chernobyl. they don't have the mechanism for that neutronic excursion, the atomic bomb-like explosion that occurred there, but in

Open, but if the containment were intact, the pressure inside would be maintaining constant and not decaying as it is or reports show that pressure is dropping. >> in terms of that word containment, it is a word we use commonly not as jargon, it is meant to be several types of structure. containment could be the outside building that surrounds the reactor as a whole. that was what we saw the explosion do so much damage to in the first two explosions, but containment also refers to the smaller containment around the core itself, around the reactor itself? >> that's correct. these type of plants...

I am obviously a layman, trying to understand this for myself as well as make it understandable for viewers. >> it was a solid and accurate description of where we are today. >> okay. within the last couple hours, as i mentioned, a third explosion was reported at fukushima number 2 reactor. number 1 had explosion this weekend, number 3 did 24 hours ago. and now number 2 has happened as well. can we tell yet if this is a more consequential blast than the others or is this likely to be of the same consequence? >> the initial reports coming out of the facility are that this is the most severe exp...

Out someplace, perhaps through a breach, a crack, a valve left open, but if the containment were intact, the pressure inside would be maintaining constant and not decaying as it is or reports show that pressure is dropping. >> in terms of that word containment, it is a word we use commonly not as jargon, it is meant to be several types of structure. containment could be the outside building that surrounds the reactor as a whole. that was what we saw the explosion do so much damage to in the first two explosions, but containment also refers to the smaller containment around the core itself, aro...

Building. and to be honest, what we know right now -- about the ground acceleration for the 8.9 earthquake that occurred in japan. our understanding is that it was .350 gs and the designs for the west coast plants exceed that by a significant amount. >> right now it looks like the folks in japan, the experts in japan, are really in unchartered territory. they are doing all sorts of things to prevent a meltdown and a nuclear crisis, including using sea water and other devices which aren't normal operating procedures. is that your understanding as well? >> well, they are certainly outside of the...