Kimimasa Mayama, Associated Press
A Tokyo Electric Power Co.'s staff member measures the radiation in the air as workers prepare materials which will be used to create a frozen underground wall to surround the crippled reactor buildings at Tokyo Electric Power Co.'s Fukushima Daiichi Nuclear Power Plant in Okuma, Fukushima Prefecture, northeast of Tokyo, Japan, Wednesday, July 9, 2014. TEPCO plans to build a frozen wall around the buildings of Units 1 to 4 at the tsunami-devastated nuclear power plant to stop radiation-contaminated water from flowing to the sea. TEPCO has been struggling with massive amounts of toxic water as the operator continues to pump water into three reactors to keep them cool. The plant suffered meltdowns at three of its six reactors after a tsunami swept through the facilities in March 2011.