Accumulation of 137Cs in Finnish Lapps

It is already widely known that the Lapps have received or will receive high extra doses from nuclear tests performed thus far. However, the most spectacular source of irradiation is the natural radionuclide210 Po (3 rem/30 yr). The second in importance is the natural external radiation (1.65 rem/ 30 yr)., while the third (for the present generation) is the fallout nuclide 137Cs (1 rem/ 30 yr). The arctic food chains described exist not only in Lapland but in all the arctic and subarctic regions of the northern hemisphere.