SPECIATION OF CESIUM ISOTOPES IN RIVER WATER: A CASE STUDY IN THE UKEDO RIVER.

137Cs in river systems can be taken up by aquatic animals. In this paper, total 137Cs concentration in the Ukedo River system and 137Cs presence in dissolved, acid-soluble and -insoluble fractions in river water samples were determined. Total 137Cs concentration had the maximum value of 2.