No.

In a revelation that, for some, will dredge up memories of TEPCO’s stunning admission back in 2013 that nearly 300 tonnes of radioactive material had leaked from the ruins of the Fukushima Daiichi nuclear-power plant into the water outside, contaminating virtually the entire Pacific Ocean, officials at the Japanese power company told the Associated Press that contaminated water may have leaked into the soil surrounding the plant after human error caused safety mechanisms to fail.