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Abstract: (9703 Views)
Background: Radon and its daughter product are
a major source of natural radiation exposure, the
measurement of radon concentration in dwellings is
assuming ever increasing importance. It is known
from recent surveys in many countries that radon and
its progeny contributes significantly to total inhalation
dose and is well established that radon when inhaled
in large quantity causes lung disorder. In view of this
the authors have measured 222Rn and 220Rn levels in
dwellings of different volumes at Bangalore Metropolitan,
India. Materials and Methods: Integrated and
long duration measurements of radon were carried
out using twin cup dosimeters with Solid State
Nuclear Track Detector technique. Results: Results
showed that concentrations of 222Rn, 220Rn, their
progenies and dose rates in dwellings decreased with
increase in room volume. Conclusions: The annual
effective inhalation dose due to 222Rn, 220Rn and their
progenies from the study ranged between 0.2–4.4
with an arithmetic mean of 1.7 ± 1.1 mSv y-1. The
dwellers of lower volumes are posed to high dose
rates. Iran. J. Radiat. Res., 2012 9(4): 231-236
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