Environmental radioactivity in Denmark in 1977

Strontium-90 was determined in samples from all over the country of precipitation, ground water, sea water, grass, dried milk, fresh 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 soil, sea water, milk, grain products, potatoes, vegetables, fruit, total diet, fish, and meat. It was also measured by wholebody-counting of a control group at Risø Health Physics Department. Estimates of the mean contents of radiostrontium and radiocesium in the human
diet in Denmark during 1977 are given. The Υ-background was measured regularly by TLD, ionization chamber and on site Υ-spectroscopy at locations around Risø, at ten of the State experimental farms along the coasts of the Great Belt and around Gyllingnæs. The marine environments at Barseback and Ringhals were monitored for Cs and corrosion products ( ⁵⁸Co, ⁶⁰Co, ⁶⁵Zn, ⁵⁴Mn). Results of plutonium determinations in soil and sediments from 1977 are presented in this report. Tritium was determined in groundwater and precipitation. Finally the report includes routine surveys of environmental samples from the Risø area.