Health Physics

Skip Navigation LinksHome > October 1997 - Volume 73 - Issue 4 > Raetrad Model Extensions for Radon Entry Into Multi-Level Bu...
Health Physics:
Notes: PDF Only

Raetrad Model Extensions for Radon Entry Into Multi-Level Buildings with Basements or Crawl Spaces.

Nielson, Kirk K.; Rogers, Vern C.; Rogers, Vern; Holt, Rodger B.

Collapse Box


The RAETRAD model was generalized to characterize radon generation and movement from soils and building materials into multi-level buildings with basements or crawl spaces. With the generalization, the model retains its original simplicity and ease of use. The model calculates radon entry rates that are consistent with measurements published for basement test structures at Colorado State University, confirming approximately equal contributions from diffusion and pressure-driven air flow at indoor-outdoor air pressure differences of dP(i-o) = -3.5 Pa. About one-fourth of the diffusive radon entry comes from concrete slabs and three-fourths comes from the surrounding soils. Calculated radon entry rates with and without a barrier over floor-wall shrinkage cracks generally agree with Colorado State University measurements when a sustained pressure of dP(i-o) = -2 Pa is used to represent calm wind (<1 m s-1) conditions. Calculated radon distributions in a 2-level house also are consistent with published measurements and equations.

(C)1997Health Physics Society


Article Tools


Article Level Metrics

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.