Excerpt from Wikipedia:
On 10 September 2015, floodwaters driven by Typhoon Etau prompted mass evacuations in Japan and overwhelmed the drainage pumps at the stricken Fukushima nuclear plant. A TEPCO spokesperson said that hundreds of metric tons of radioactive water entered the ocean as a result. Plastic bags filled with contaminated soil and grass were also swept away by the flood waters.
194 “Flooding swept away radiation cleanup bags in Fukushima”. The Japan Times Online. 12 September 2015. ISSN0447-5763. Retrieved 13 September 2015.