The ‘Sources’ library includes modules for calculation of radionuclides releases to air, surface waters and groundwater from the contaminated object (source-term) such as uranium mill tailings or radioactively contaminated land.
The source-term modules included to ‘Sources’ library are described in the fallowing table.
|Tailings without cover
|This module is designed to describe radionuclide fluxes to subsurface environment and /or radon exhalation to atmosphere from the uranium mill tailings site. The source term is modeled as a single compartment. The radionuclide leaching from soil is described using model of Baes and Sharp . Radon exhalation to atmosphere is modeled using diffusion model described in [IAEA, 2013].
|Contaminated land without cover
|This module describes radionuclide fluxes to subsurface environment and /or radon exhalation to atmosphere from the radioactively contaminated topsoil layer. It implements the same mathematical models as the “Tailings without cover” module described above.
|This simple model describes chronic (constant in time) release of radioactive contaminant to atmosphere and/or groundwater or surface water body.
|Generic source term
|This module represents a simple model for release(s) of radioactive contaminant to aquatic object (unsaturated zone/aquifer or surface water body) which is described either by the first-order rate reaction (transfer coefficient) or by the constant in time release rate (transfer rate), or both processes simultaneously.