That's due to the heat that remains in the nuclear core, both from the recently-disabled but still-hot fuel rods and from the various byproducts of the fission process.

TEPCO must have known, experts say, that the water was boiling and being turned into steam by the red-hot fuel rods, thus increasing the exposure of those rods to the air.

In the baggage cars, kelps, fishplate, rolled iron, sleepers, wire rods, plates and sheets, laminated articles, hot rolled hoops, splints and mortar carriages, and Zorès ore.