TOKYO ? A new simulation shows that debris from melted fuel rods may have seeped deeper into the floor of one of Japan's tsunami-hit nuclear reactors than previously thought, to within a foot from breaching the crucial steel barrier.
Tokyo Electric Power Co., which operates the disabled Fukushima Dai-ichi nuclear plant, said Wednesday that its latest simulation showed that fuel at the No. 1 reactor may have eroded part of the primary containment vessel's thick cement floor. The fuel came within a foot of the container's steel wall, but has been somewhat cooled.
The nuclear crisis following the March 11 earthquake and tsunami caused massive radiation leaks and the relocation of some 100,000 people.
TEPCO still aims to bring the plant to "cold shutdowns" by year's end.
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