Radioactivity survey data in Japan, Part 1. Environmental materials

The collection and pretreatment of samples are explained for rain and dry fall-out, airborne dust, service water and freshwater, soil, seawater, sea sediments, total diet, rice, milk, vegetables, tea, fish, shellfish and seaweeds. The preparation of samples for analysis is explained for rain, service water and freshwater, soil and sea sediments, rice, airborne dust, diet, milk, vegetables, fish and shellfish, seaweeds, tea and others. The separation of strontium-90 and cesium-137, the determination of stable strontium, calcium and potassium, and the counting of activity using low background beta counters are described. As the results, the strontium-90 and cesium-137 in rain and dry fall-out, airborne dust, service water, freshwater, soil, seawater and sea sediment from April, 1996 to September, 1996 are reported. The graphs showing the change of these data from 1992 to 1996 are shown. Finally, 47 sampling locations in Japan are shown. Samples were sent to Japan Chemical Analysis Center from 46 contracted prefectures. (J.P.N.)