A small quantity of radioactive water has leaked from a storage tank at Japan’s tsunami-crippled Fukushima Daiichi nuclear power plant, Tokyo daily Asahi Shimbun reported Saturday.
A worker at the facility, located in northeastern Japan, found a wet patch measuring 20 sq. centimeters (3 sq. inches) under a storage tank for radiation-contaminated water on Friday morning, Tokyo Electric Power Co. the plant’s operator, said.
Seventy microsieverts per hour of beta-ray-emitting radioactivity, far exceeding the recommended maximum exposure of 0.11 microsieverts per hour, were detected on the surface where the water had leaked.