Artificial radioactive contamination of sediment samples along the Romanian sector of the Danube river and the Black Sea coast

The concentrations of ¹³⁷Cs were determined by in 11 sediment samples, collected along the Romanian sector of the Danube river and the Black Sea coast during 1994 γ-ray spectrometry. The concentrations of ⁹⁰Sr in the same sediment samples were determined by β-counting of the ⁹⁰Y oxalate, precipitated after strontium separation using a strontium extraction chromatography column. The concentration distributions of ¹³⁷Cs and ⁹⁰Sr are compared with the ²³⁸Pu and ^239,240Pu concentration distributions in the same samples, reported in a previous paper. The accumulation potential of ¹³⁷Cs, ⁹⁰Sr and plutonium isotopes in the river and sea sediments analysed is discussed.