期刊
RADIATION PROTECTION DOSIMETRY
卷 177, 期 1-2, 页码 16-20出版社
OXFORD UNIV PRESS
DOI: 10.1093/rpd/ncx137
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- German Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) [3613S10021]
Compared to the intended EU reference level of 300 Bq m(-3) for indoor radon concentrations, the contribution of building materials appears to be low. Considering the recommended limit of 100 Bq m(-3) by WHO, their contribution is supposed to be relevant, especially at low air exchange rates. This study as part of a two-part research project investigated the suitability of direct low level Rn-222 measurement under simulated indoor conditions with commercial radon monitors and dynamically operated emission test chambers. Active measuring devices based on ionisation or scintillation chambers with 1-sigma uncertainties below 8.6% at 20 Bq m(-3) were found to be best suitable for a practical test procedure for the determination of radon exhalation rates of building materials. For the measurement of such low concentrations, the knowledge of the accurate device background level is essential.
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