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Good Morning America: What Is a Nuclear Meltdown?

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  • i always thought it was like a huge fireish bubble around the nuclear plant

  • The worst case scenario would be the cores melting through the containment, then the structure, then into the ground to reach groundwater causing a steam explosion which would scatter radioactive material over a vast area and into the atmosphere.

  • that's bad enough since the meltdown in Chernobyl on April 26, 1986,

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