Lead Fukushima Investigator: “The ‘nuclear lava’ melted the bottom of the containment vessel" -- "Leaking a huge amount of fission gasses and particles”

Yet another false assumption involved the containment vessel, an invention of nuclear engineers to assure nearby inhabitants that, if there were an unimaginable accident and fission products leaked out of the core, they would be confined inside and not leak out into the external environment. This long-held myth was also broken by Fukushima No.1, as the molten fuel dropped through the pressure vessel and the “nuclear lava” melted the bottom of the containment vessel, leaking a huge amount of fission gasses and particles to the air and water.

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