||Development of a lumped-parameter model of indoor radon concentrations : project summary /
Nielson, Kirk K. ;
Rogers, V. C. ;
Holt, R. B.
||Cohen (S.) and Associates, Inc., McLean, VA. ;Rogers and Associates Engineering Corp., Salt Lake City, UT.;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 ; [National Technical Information Service, distributor],
||EPA/600/SR-94/201; EPA-68-DO-0097; EPA/600/R-94/201
Radon measures. ;
Indoor air pollution ;
Radioecological concentration ;
Residential buildings ;
Radionuclide transport ;
Soil properties ;
Concrete slabs ;
Sensitivity analysis ;
Lumped parameter systems ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The report describes a simplified, lumped-parameter model to characterize indoor radon concentrations from data that are more readily available than those required for existing mathematical models. The lumped-parameter model was developed from numerous sensitivity analyses with the more detailed RAETRAD model and from analyses of trends from empirical data sets. The model analyses established radon dependence on soil parameters, house size, floor cracks and openings, and indoor air pressures. The empirical analyses estimated house air infiltration properties, concrete slab diffusion properties, sub-slab ventilation effectiveness, and floor crack areas. The equation expresses net soil-related indoor radon concentrations as a function of the sub-slab radon concentration, which defines the radon source strength, and a number of house parameters that characterize the radon entry and accumulation characteristics.
Distributed to depository libraries in microfiche. Shipping list no.: 95-0446-M. Microfiche.