"Fukushima Daiichi Nuclear Power Plant: Recent Contaminated Water Leaks"

Untreated water leaked from a filtering device at the Fukushima Daiichi nuclear power plant, containing 220 times the standard level of radioactive substances. The leak, caused by a valve left open during an inspection, resulted in an estimated 5.5 tons of water containing about 22 billion becquerels of cesium-137 and other radioactive substances entering the ground. Tokyo Electric Power Company plans to recover the leaked water and surrounding soil, and has not confirmed any environmental impact outside the plant.