A Review of Indoor and Outdoor Radon Equilibrium Factors-part II: 220Rn

Health Physics
Jing Chen, Naomi H Harley

Abstract

Radon exposure levels are given in terms of radon gas concentration in the air. However, in the calculation of radon dose to the lung, the radon equilibrium equivalent concentration is used. The measured equilibrium factor times the measured radon gas concentration estimates the equilibrium equivalent concentration. Therefore, equilibrium factor is an important factor in radon dose calculations. A review of published measurements of equilibrium factors shows a range of values reported in studies from more than 13 countries and regions measured in indoor residential, indoor public, and outdoor environments. Values for Rn are reported and discussed here as the second of a two-part series, with special attention paid to results from India and China, where measured equilibrium factors are reported for hundreds and thousands of households, respectively. The wide range of measured equilibrium factors suggests that location-specific values measured in the typical breathing zone are more appropriate than a worldwide average value in the calculation of lung bronchial dose.

References

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Aug 28, 2018·Health Physics·Jing Chen, Naomi H Harley

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Citations

May 7, 2020·International Journal of Environmental Research and Public Health·Yasutaka OmoriShinji Tokonami
May 1, 2021·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Atsuyuki SorimachiTetsuo Ishikawa
Nov 6, 2021·Environmental Monitoring and Assessment·Md Mahamudul HasanTakeshi Iimoto

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