Download e-book for iPad: Control of Radon in Houses: Recommendations of the National by National Council on Radiation Protection and Measurements

By National Council on Radiation Protection and Measurements

ISBN-10: 092960007X

ISBN-13: 9780929600079

ISBN-10: 1435629671

ISBN-13: 9781435629677

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Extra info for Control of Radon in Houses: Recommendations of the National Council on Radiation Protection and Measurements (Ncrp Report ; No. 103)

Example text

Jonassen (1984) combined the effect of filtration with a static electric field from a charged (less than 15 kilovolt) plate and determined that the removal efficiency of radon decay products by the charged disc was much greater when the air was simultaneously filtered. He suggested that this observation was due to the higher electrical mobilities of charged and unattached species, which represented a greater portion of the airborne activity following filtration a t a rate of three room volumes per hour.

There are thousands of concrete batching plants that generally obtain their aggregates from locally excavated gravels or crushed rocks, and their radionuclide content is typically not known by plant operators. S. using aggregates with high radium concentrations. However, the existence of a few such locations cannot be ruled out. 2 Changes in Building Design Radon exposures from building materials could, if necessary, be reduced by decreasing the mass of mineral-containing building materials used in a house.

All of these approaches are designed to cause local reversal of the pressure differences so that air flows from the building through the adjacent soil air spaces to the collection system, effectively preventing the entry of soil gas into the building. This flow of comparatively radon-free air into the soil from the building, and also from the atmosphere, dilutes the radon concentrations in the soil adjacent to the building, and diverts the locally produced radon to the collection system instead of permitting it to enter the building.

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Control of Radon in Houses: Recommendations of the National Council on Radiation Protection and Measurements (Ncrp Report ; No. 103) by National Council on Radiation Protection and Measurements


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