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~ 3 ~
Natural radioactivity and anthropogenic radioactivity:
Nuclear facilities when functioning properly release virtually no radioactivity. The worst nuclear
accidents that have occurred, have released levels of radioactivity many orders of magnitude
smaller than the natural radioactivity in the environment.
Total radioactivity from Chernobyl & Fukushima compared with
natural radioactivity in the oceans. The 5 metre yellow circle
(shown only in tiny part), surrounding the blue circle above,
represents the natural radioactivity in the Earth’s crust.
Natural radioactivity of the oceans
16,000,000 Petabecquerels
Total radioactivity release
Chernobyl 5300 PBq
Total radioactivity release
Fukushima 520 PBq