Journal of Engineering Physics and Thermophysics
is a translation of Inzhenerno-fizicheskii Zhurnal,
a publication of the Academic Scientific Complex
"A. V. Luikov Heat and Mass Transfer Institute"
of the National Academy of Sciences of Belarus
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VERTICAL TRANSFER OF 137Cs IN PEAT SOILS FALLEN
OUT AS A CONSEQUENCE OF THE CHERNOBYL ACCIDENT
N. M. Olekhnovich, G. I. Makovetskii,
A. I. Galyas, O. I. Pashkovskii,
G. M. Severin, G. A. Turtsevich, and
K. I. Yanushkevich
UDC 631.416:539.16:546.35
On the basis of measurements of the specific radioactivity
of soil specimens sampled with a small step along their deposition,
depth profiles are plotted for the curves of the vertical change in
137Cs in peat soils not treated since the Chernobyl accident.
A theoretical analysis is provided for the plotted profiles that shows
that the vertical transfer of 137Cs in these soils is described
adequately within the framework of a model that accounts for the processes
of diffusion and convection of the radionuclide in the soil solution
and its sorption by the solid phase of the soil. The parameters of
the model are determined and a prediction is given for the migration
character of 137Cs.
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