Transuranic and fission product contamination in lake sediments from an alpine wetland, Boréon (France).
Transuranics and fission products have been measured in lake sediment samples, collected in an alpine wetland, to determine their vertical distribution and calculate inventories. The radionuclides considered are 90Sr, 137Cs, 238Pu, 239/240Pu and 241Am. From the results, a better knowledge of radionuclide accumulation mode and behaviour was obtained. In addition, the origins of the individual pollutants could be deduced from activity ratios. Analyses were made on different sediment cores. The sampling sites were chosen to enable future determination of the mass balances of the radiopollutants. As the selected study area is in a recreational area used by urban populations, a rough estimate was made of the mean external dose from 137Cs for comparison with the French regulation.
Schertz
M
M
Laboratoire de Radiochimie, Sciences Analytiques et Environnement, Université de Nice - Sophia Antipolis, 28 Avenue Valrose, 06108 Nice, France. maiaschertz@free.fr
Michel
H
H
Barci-Funel
G
G
Barci
V
V
D000576:Americium / Q000032:analysis; D002588:Cesium Radioisotopes / Q000032:analysis; D047852:Chernobyl Nuclear Accident; D004781:Environmental Exposure / Q000032:analysis*; D005602:France; D005618:Fresh Water; D019015:Geologic Sediments / Q000032:analysis*; D006801:Humans; D009680:Nuclear Fission; D009689:Nuclear Warfare; D011005:Plutonium / Q000032:analysis; D011829:Radiation Dosage; D011847:Radioactive Fallout; D018788:Radioactive Hazard Release; D011848:Radioactive Pollutants / Q000032:analysis*; D018570:Risk Assessment; D013326:Strontium Radioisotopes / Q000032:analysis
D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D011848:Radioactive Pollutants; D013326:Strontium Radioisotopes; D011005:Plutonium; D000576:Americium