![]() Since high radon concentrations commonly occur during periods when homes are “closed up” (i.e. However, diurnal and seasonal radon variations should be taken into account when performing short-term radon measurements. A short-term test for radon, using an activated charcoal detector or another type of detector such as an electret ion chamber, can provide a first indication of the mean long-term radon concentration in a home. Radon measurements are often discussed in terms of either a short-term or long-term test ( Quindos et al. In addition, radon gas measurements are usually preferred to decay product measurements because of their relative simplicity and cost effectiveness. The main sources of detailed guidance on radon devices and measurements are publications from OECD (1985), NCRP (1988), SSK (2002) and USEPA (1992, 1993, 1997).Īlthough radon decay products, primarily polonium ( 218Po and 214Po), are responsible for most of the radiation dose delivered by radon ( 222Rn), radon gas concentration is generally considered a good surrogate for the radon decay product concentration. Quality assurance and quality control guidelines are also presented. The chapter also gives guidelines for various scenarios of radon measurements, including protocols ranging from individual testing of a single home to diagnostic measurements to assess radon exhalation from building materials these guidelines may serve to enhance national guidance for radon measurement or provide the basis for the development of new guidelines. This chapter provides a framework for the selection of devices for the measurement of radon and its decay products and also for the development of procedures and policies to assure the reliability of radon measurements in both air and water. Quality assurance and quality control measures are strongly recommended to assure the reliability of radon measurements.
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