fukushima melt through

The tag 'fukushima melt through' covers discussions about the Fukushima Daiichi nuclear disaster, specifically the possibility that nuclear fuel melted through reactor pressure vessels and accumulated at the bottom of containment vessels. This scenario, known as a melt-through, is considered more severe than a core meltdown. Content includes references to a government report submitted to the IAEA suggesting this situation occurred in three reactors. The tag is relevant for users seeking information on nuclear safety, accident severity, and official assessments of the Fukushima incident.