100,000,000 becquerels per cubic centimeter of radioactivity estimated for Fukushima sludge.

Sludge that will be generated in the process of treating radioactive water at the tsunami-hit Fukushima No. 1 Nuclear Power Plant is estimated to contain 100 million becquerels of radioactive substances per cubic centimeter, the plant operator said. [...] TEPCO estimates that about 2,000 cubic meters of sludge will be generated [...] However, because it is so highly radioactive, the sludge is extremely difficult to manage. Areva acknowledges that it has never handled sludge generated through the treatment of water emitting more than 1,000 millisieverts of radiation per hour.