In this May 10, 2011 file photo released by Tokyo Electric Power Co., workers check the status of the water level indicator at the Unit 1 reactor building at the Fukushima Dai-ichi nuclear power plant in Okuma town, Fukushima Prefecture, northeastern Japan.(AP Photo/Tokyo Electric Power Co.)TOKYO (Kyodo) -- The glitch-plagued water decontamination system at the Fukushima Daiichi nuclear power complex has been able to lower the concentration of radioactive substances in highly contaminated water to the targeted level, the plant's operator Tokyo Electric Power Co. said Friday.
The successful trial run of the water treatment system paves the way for the start, possibly by the end of June, of operations to cool the damaged nuclear power reactors using water recycled in the decontamination system to establish a circulating cooling system as part of efforts to contain the crisis triggered by the earthquake and tsunami in March.
The utility known as TEPCO said the level of both radioactive cesium-134 and cesium-137 in the toxic water had dropped to one hundred-thousandth, achieving the target of 100 becquerels per cubic centimeter or less.
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