Abstract
It is found that in the presence of several barriers the emanation of radionuclides from a sunken object always has a maximum as a function of time. Its position depends on the time constant of radionuclide emanation from the fuel elements and the transport time constants of the object’s systems. After emanation, a radionuclide is carried away by currents and transported into the sediments by settling and diffusion. A relation between the processes occurring inside the object and the sediments is found. Measurements performed in the gulfs of Novaya Zemlya show that the radionuclide distribution over depth in the sediments has a maximum corresponding to the indicated emanation peak as a function of time. For the gulfs of Novaya Zemlya, the limits of these time constants are determined from the measurements. It is shown that the time constant of radionuclide emanation from fuel elements decreases with time.
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