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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

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