TEPCO, the operator of Japan's crippled Fukushima nuclear plant, said Wednesday record amounts of radiation had been detected in the basement of reactor number 1, further hampering clean-up operations.
TEPCO took samples from the basement after lowering a camera and surveying instruments through a drain hole in the basement ceiling.
Radiation levels above radioactive water in the basement reached up to 10,300 millisievert an hour, a dose that will kill humans within a short time after making them sick within minutes.
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