Abstract
Abstract Results of a nationwide measuring programme in Germany are presented where long-lived natural radionuclides of the uranium and thorium series in samples of daily total diet were analysed. Typical ranges and average values of the specific activities are given. There are neither differences between the specific activities in total diet for adults and the age group ≤1 year nor meaningful regional differences. The resulting dose due to ingestion of natural radionuclides has been deduced for all age groups and evaluated. The radionuclides 210Pb, 210Po, 228Ra and 226Ra are responsible for about 90 % of the total ingestion dose which is 0.09 mSv per year on average without 40K contribution.
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