TEPCO Says 13,000 Tons of Toxic Water May Need to Be Cleaned Again
A treated water sample extracted Monday contained around 10 million becquerels per liter of beta ray-emitting radioactive substances, such as strontium. Usually the radiation level is said to drop to around several hundred becquerels.
TEPCO suspended all three lines on Tuesday, but it said Wednesday that water that was not adequately treated may have flowed into a total of 21 tanks, each with room to store 1,000 tons, at the site. The tanks are all connected.
The 21 tanks keep about 13,000 tons of water, so workers may have to put them through the system again to reduce their radiation level, TEPCO said.
The latest incident is another blow to TEPCO as it struggles to manage enormous volumes of toxic water. The amount is increasing daily because groundwater is seeping into reactor buildings and mixing with water used to cool three reactors that melted down during the nuclear crisis that began in March 2011.