Corium is a lava-like molten mixture of portions of nuclear reactor core, formed during a nuclear meltdown, the most severe class of a nuclear reactor accident. It consists of nuclear fuel, control rods, structural materials from the affected parts of the reactor, products of their chemical reaction with air, water and steam, and, in case the reactor vessel is breached, molten concrete from the floor of the reactor room.
They don't look Japanese to me...
(Somehow this came to mind):
Everyone knows Balrogs are from Eastern Europe.
Just like any other non-shiny person/artifact in the Tolkien universe.
Thus reaffirming my fear of big, big factories.
did they screw up on purpose?