Environmental radioactivity in Denmark in 1981

Strontium-90 was determined in samples from all over the country of precipitation, ground water, lake and stream water, sea water, dried milk, grain, bread, potatoes, vegetables, fruit, total diet, and human bone. Furthermore, 90Sr was determined in local samples of air, rain water, soil, grass, sea plants, fish and meat. Cesium-137 was determined in air, precipitation, sea water, sediments, milk, grain products, potatoes, vegetables, fruit, total diet, sea plants, fish, and meat. Estimates of the mean contents of radiostrontium and radiocesium in the human diet in Denmark during 1981 are given. Tritium was determined in precipitation, fresh water and sea water. Plutonium and Americium were measured in sea water, sediments, sea plants and mussels. The y-background was measured regularly by TLD, ionization chamber and on site y-spectroscopy at locations around Risø, at ten of the State experimental farms along the coasts of the Great Belt and around Gylling Næs. The marine environments at Barsebäck and Ringhals were monitored for ¹³⁷Cs and corrosion products (⁵⁸Co, ⁶⁰Co, ⁶⁵Zn, ⁵⁴Mn). Finally the report includes routine surveys of environmental samples from the Risø area.