TEPCO yet to nail down cause of radioactive leaks at Fukushima plant

The operator of the crippled Fukushima Daiichi nuclear power plant said Friday it has failed to find out why radioactive water leaked from underground tanks during visual checks of an area suspected to have been the cause of the incidents.

Workers removed part of the soil covering one of the troubled tanks and checked an area where a leak detection pipe, installed close to the tank, pierces though a water-containment sheet. But they could not find any irregularities there, plant operator Tokyo Electric Power Co. said.

"We have no choice but to think that the leakage occurred at another place in the case of the No. 2 tank," TEPCO spokesman Masayuki Ono said at a press conference, while noting that junctions of water-containment sheets located around the tank could be seen as other suspicious areas.
[link to english.kyodonews.jp]
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