||RAETRAD model of radon gas generation, transport, and indoor entry :
Nielson, Kirk K. ;
Rogers, V. C. ;
Holt, R. B.
||Rogers and Associates Engineering Corp., Salt Lake City, UT. ;Cohen (S.) and Associates, Inc., McLean, VA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.;Florida Dept. of Community Affairs, Tallahassee.
||U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory,
||EPA 600-R-94-198 ; PB95-142030; RAE-9127/10-1R1; EPA-68-DO-0097
Radon--Measurement--Mathematical models ;
Soil structure interactions ;
Radionuclide migration ;
Nuclear decay ;
Residential buildings ;
Indoor air pollution ;
Natural radioactivity ;
Radioecological concentration ;
Soil gases ;
Air flow ;
Concrete slabs ;
Mathematical models ;
||Region 10 Library/Seattle,WA
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 v. (various pagings) : ill. ; 28 cm.
The report describes the theoretical basis, implementation, and validation of the RAdon Emanation and TRAnsport into Dwellings (RAETRAD) model, a conceptual and mathematical approach for simulating radon (222Rn) gas generation and transport from soils and building foundations to the indoor environment. It has been implemented in a computer code of the same name to provide a relatively simple, inexpensive means of estimating indoor radon entry rates and concentrations. RAETRAD uses the complete, multi-phase differential equations to calculate radon generation, decay, and transport by both diffusion and advection (with pressure-driven air flow). The equations are implemented in a steady-state, 2-dimensional finite-difference mode with elliptical-cylindrical geometry for maximum efficiency and modeling detail. The radon generation, decay, and transport part of RAETRAD was validated by similar comparisons with 1-dimensional analytical calculations for open and concrete-covered soils. Most radon concentration profiles and surface radon fluxes for these comparisons were also within 1%.
"November 1994." "EPA 600-SR-94-198." "EPA Interagency Agreement RWFL 933783-01." "Contract 68-DO-0097."