Evaluation of Averaged Annual Dose Rate Exposed by Natural Radiations for Each Country in the World

Evaluation of averaged annual dose rate exposed by natural radiations for each country in the world has been performed on the basis of the fundamental data of UNSCRE 2000, considering that the present evaluation gives both of world and Japan averaged values which are consistent with both official authentication values. The result showed that the values of countries of north and east Europe are more than two times of the Japan average. As an application of the evaluated data set, the correlation between the natural exposure dose rates and the incidence of a cancer was investigated by using the age-standardized incidence data reported by IARC (International Agency for Research on Cancer) of World Health Organization. It was found that the incidence of cancers near human body surface generally indicate a negative or small positive correlation to the annual external dose rates than that to a smoking rate by country.