https://www.greenpeace.org/static/planet4-japan-stateless/20...
https://www.theguardian.com/world/2020/oct/23/fukushima-reac...
> In addition to high levels of hazardous radionuclides such as strontium-90, TEPCO on 27 August 2020 acknowledged for the first time the presence of high levels of carbon-14 in the contaminated tank water