Identification of advective entry of soil-gas radon into a crawl space covered with sheets of polyethylene foil

摘要

To assess the effectiveness of mitigative measures against radon (Rn-222) entry into houses, experiments were conducted in a crawl-space house where the dirt floor of the crawl space was covered with sheets of 0.23 mm polyethylene foil fixed to the walls. The radon concentration was measured below the foil and in the crawl space together with environmental variables such as indoor-outdoor pressure differences. The experimental data was analyzed using various types of models including a simplistic mass-balance model, a regression model, and a two-dimensional numerical model based on Darcy flow or soil gas and combined diffusive and advective transport of radon. (au) 28 tabs., 36 ills., 61 refs. (Atomindex citation 27:043964)