External irradiation from the Chernobyl fallout over Sweden

This report gives estimates of the external irradiation of the Swedish population due to radioactive fallout from the Chernobyl accident. The estimates are mainly based on airial gammaspectrometric surveys made by the Geological Company of Sweden (SGAB) and high-resolution field-gamma measurements performed by the Swedish Defence Research Institute. Such measurements were made in 1986, 1987 and 1988, thus making it possible to followed the change of exposure rate with time. The results are presentes as tables giving the spatial distribution of Cs-137 deposition over Sweden and the estimated average and collective doses broken down county-wise. For the most affected areas the dose distribution is also given (2 figs., 15 tabs., 21 refs.)