At the same time , anthropogenic radionuclides ( caused by humans ) are due to thermonuclear reactions resulting from explosions and nuclear weapons tests , discharges from nuclear facilities , accidents deriving from the reprocessing of commercial fuel , waste storage from these processes and to a lesser extent , nuclear medicine . Some polluted sites by these radionuclides are the US DOE facilities ( like Hanford Site ) , the Chernobyl and Fukushima exclusion zones and the affected area of Chelyabinsk Oblast due to the Kyshtym disaster
Kyshtym disaster
Kyshtym disaster
Bioremediation of radioactive waste