||Site-specific characterization of soil radon potentials : final report /
Nielson, K. K. ;
Holt, R. B. ;
Rogers, V. C.
||Rogers and Associates Engineering Corp., Salt Lake City, UT.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.;Florida Dept. of Community Affairs, Tallahassee.
|| The Office,
Radon control industry--Florida. ;
House construction--Safety regulations--Florida.
Soil gases ;
Radioecological concentration ;
Site characterization ;
Natural radioactivity ;
Nuclear decay ;
Radionuclide migration ;
Soil properties ;
Soil moisture ;
Soil-structure interactions ;
Residential buildings ;
Air filtration ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 volume (various pagings) : illustrations ; 28 cm
This report develops a mathematical basis for using simple site measurements to estimate soil radon potential. The approach utilizes a lumped-parameter model of radon generation and entry that was developed previously for Florida house and soils from the more detailed RAETAD numerical mode. Site-specific soil radon potential is defined as the rate of randon entry into a reference house, consistent with the definition used previously for the radon potential maps. The models show that, in the simplest case, soil radon potential can be reduced to a simple function of two measurable parameters: the soil surface radon potential can be reduced to a simple function of two measurable parameters: the soil surface radon flux and the soil moisture (as a fraction of saturation). The flux gives the radon generation rate of the soil profile, and the moisture is a surrogate for random transport parameters, including air permeability and random diffusion coefficient. For comparison to indoor randon levels, the randon flux can also be related to sub-slab random concentrations. Measurements of randon flux from concrete floor slabs also can be used to estimate the non-advective contribution to radon entry rates.
"Rogers and Associates Engineering Corporation." "Prepared by National Risk Management Research Laboratory"--Cover. Shipping list no.: 98-0341-M. Includes bibliographical references (pages 6-1-6-3). "EPA/600/R-95-161." "EPA Interagency Agreement RWFL933783." Microfiche.