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Not talked about on the show. it is scary-sounding, but it is worth understanding, and it is understandable even if you do not have a scientifically minded mind. all right. so the fuel rods are 12-foot-long skinny pieces of metal. they are straws in essence, right? the fuel is actually stacked inside these straws, little tootsie roll-like pellets of uranium. as the fuel rods get too hot, the metal starts to break down, what happens to those pellets? well, if all goes well, maybe the pellets fuse together in the shape they were being held in inside those metal straws. maybe they stay in an orde...

The uranium doesn't stay in those orderly rods, it gets into a big single molten pile. you've heard the term "critical mass," right? it is dramatic sounding when you're talking about bike protests. it is actually dramatic when you talk about where that term comes from. if the uranium melting down in a spent fuel pool or reactor is allowed to melt down completely and become one giant molten mass, tepco admitted this week that it is possible that nuclear fission could start again. they call that criticality. if that happened, there would be an explosion. and after all the efforts to prevent the ...

What happens to those pellets? well, if all goes well, maybe the pellets fuse together in the shape they were being held in inside those metal straws. maybe they stay in an orderly little stack of tootsie rolls. if all does not go well, those stacks of pellets collapse and the uranium doesn't stay in those orderly rods, it gets into a big single molten pile. you've heard the term "critical mass," right? it is dramatic sounding when you're talking about bike protests. it is actually dramatic when you talk about where that term comes from. if the uranium melting down in a spent fuel pool or reac...