** FILE ** In this May 31, 2011, photo released Saturday, June 4, 2011, by Tokyo Electric Power Co. (TEPCO), a worker climbs scaffoldings set up around the decontamination device, having functions of nuclide adsorption and coagulation settling in the newly built radioactive water processing facilities at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima prefecture, northeastern Japan. (AP Photo/Tokyo Electric Power Co.)