Corium lava was produced at both Chernobyl and Fukushima Dai’ichi, and on a smaller scale at Three Mile Island. It’s a rare thing, this man-made lava, and it’s only produced when humans ...

The corium still emits extremely high levels of ... And what conditions at the Fukushima No. 1 nuclear plant would warrant a declaration that the cleanup is complete? The road map for ...