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Radiometric evaluation of indoor radon levels with influence of building characteristics in residential homes from southwestern Nigeria
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Radiometric evaluation of indoor radon levels with influence of building characteristics in residential homes from southwestern Nigeria
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Journal Article
Radiometric evaluation of indoor radon levels with influence of building characteristics in residential homes from southwestern Nigeria
2020
Overview
Indoor radon (
222
Rn) measurements were carried out using solid state nuclear track detectors (SSNTD) in some dwellings from southwestern Nigeria. This was aimed at statistically assessing influence of building characteristics on the measured radon and estimating excess lifetime cancer risks (ELCR). The measured radon concentrations followed lognormal distribution and were significantly influenced by some building properties. The arithmetic mean (1.60 mSv) of annual effective doses (AEDs) due to indoor radon was observed to be higher than the world average level (1.15 mSv) but less than lower limit (3 mSv) of International Commission on Radiological Protection (ICRP). The evaluated excess lifetime cancer risk ranged from 1.5 to 28.1 (MPy)
−1
with an average value of 6.3 (MPy)
−1
, indicating that after exposure to indoor radon for 70 years, 6 people in every 1000 are likely to suffer the risk of developing lung cancer. Adequate ventilation systems were recommended for houses with high level of radon to avoid unnecessary exposure to radon. However, the investigated data would form important component of the database required to set up guidelines and policy of controlling radon at home.
Publisher
Springer International Publishing,Springer Nature B.V
