Environmental radioactivity in Denmark in 1983

Strontium-90 was determined in samples from all over the country of precipitation, ground water, stream and lake 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, 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 .adiocesium in the human diet in Denmark during 1983 are given. Tritium was determined in precipitation, ground water and sea water. Plutonium and Americium were measured in marine samples. The _Υ-background was measured regularly by TLD, ionization chamber and on site Yspectroscopy 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 Barseback and Ringhals were monitored for ¹³⁷Cs and corrosion products (⁵⁸Co, ⁶⁰Co, ⁶⁵Zn, ⁵⁴Mn).