Vertical distribution of radionuclides in soil of a grassland site in Chernobyl exclusion zone.
Five soil profiles from a site about 8 km SE of the Chernobyl NPP were investigated for the vertical distribution of radionuclides. The average (137)Cs-inventory at the site is about 2.6 MBq/m(2) (reference date 1 May 1986). Apart from (137)Cs, the following radionuclides have been identified (their activity ratios to (137)Cs in brackets): (134)Cs (0.537), (125)Sb (0.068), (60)Co (0.0022), (154)Eu (0.016), (155)Eu (0.020), (94g)Nb (9.5E-5), (239/240)Pu (0.0088), (238)Pu (0.040), (90)Sr (0.30) and (241)Am (0.011). Apparent vertical migration velocities are between 0.14 and 0.26 cm/a, apparent dispersion coefficients range from 0.02 to 0.13 cm(2)/a. The rankings of the velocities v for different radionuclides are (Sr, Cs, Sb, Co, Pu)< Am < Eu and Sr < (Cs, Nb), for D, the following rankings have been found: (Nb, Sr, Cs) < Am < Eu, Cs<Sb and Nb<Co (all on p = 0.1 level).
Institute of Physics and Biophysics, University of Salzburg, Hellbrunner Strasse 34, A-5020 Salzburg, Austria.
Peter
P
Bossew
Michael
M
Gastberger
Herbert
H
Gohla
Peter
P
Hofer
Alexander
A
Hubmer
D004784:Environmental Monitoring; D006109:Poaceae; D011210:Power Plants; D011847:Radioactive Fallout / Q000032:analysis*; D018788:Radioactive Hazard Release; D011868:Radioisotopes / Q000032:analysis; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D014455:Ukraine
D011847:Radioactive Fallout; D011868:Radioisotopes; D012990:Soil Pollutants, Radioactive