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I'm glad they took it off the table. the problem is that the gap between the is fuel really critical. i'm going use my hands here. the gap is designed to be whatever, but if it's hit by water, it could push the gap close together. and what that could do is cause a nuclear criticality, a chain reaction to occur. then all bets are off. we've been dealing so far with decay heat from an old nuclear criticality, but the fuel pool itself could begin to have a chain reaction if the water hit it too hard and pushed the fuel too close together. not a good thing. i'm glad they stopped. >> mr. gunderson,...

About 30 minutes they could no longer see anymore flames. obviously there's a cooling issue there. what are the risks and what needs to be done urgently? >> the urgent thing is you have to keep water going into that nuclear fuel pool. it's not being cooled. they are just pumping salt water in and it's boiling off. almost like a pot on the stove. it will keep boiling off. you have to make up for what's boiling off. if the water drops and fuel becomes exposed, it causes a very high gamma ray exposure on site. we almost had this here in the united states back in the '90s where a fuel pool began t...

Appears to be an explosion and fire in unit 4. apparently the fuel is burning. this reactor was shut down prior to the earthquake, but they have a fuel pool, nuclear fuel pool and it's apparently on fire. >> brian: that's 4. we know there was problems at 1, 2, and 3. and there have been problems with more. >> steve: the big worry is a meltdown. when you've got the meltdown because then all that nuclear stuff melts out of the concrete and steel bubble and then goes to the containment floor and the worst case scenario is -- you can see right there -- you've got the fuel rods inside. they've got ...

Latest updates on this topic from reliable sources.

About this. i also have learned from my sources that the radiation levels in the fourth reactor are so high that they have had to evacuate the personnel from there. what that indicates is that the fuel pool is running out of order. it's sort of like leaving a pot on the stove and the nuclear fuel is physically hot and it will boil off the water. and if the personnel are not there to keep it refilled, it doesn't surprise me that radiation levels are increasing dramatically. >> so i want to go through this based on that. it's sober if not alarming presentation you just made. i can show viewers t...