Terrestrial Food Chain Pathways: Concepts and Models
This chapter presents the fundamental processes that govern transport of radionuclides in the terrestrial environment, the assumptions underlying the mathematical models used to estimate radionuclide transport in the terrestrial food chain, the application of those models, and equations to estimate radionuclide concentrations in environmental media. Fundamental processes are introduced in terms of conceptual models that describe material balance in environmental compartments and the transfer of material through and between compartments. Dynamic mathematical models are constructed to quantify transfer rates between compartments and the radionuclide mass balance in environmental compartments over time. Solutions to commonly encountered problems are presented in addition to established model formulations used in environmental assessment codes. Typical values of routinely used model parameters are also provided as examples. Application of the mathematical models is demonstrated using the PATHWAY model.
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