NDLI: A study on indoor radiation dose, radon, thoron and progenies concentrations in a hilly area

Content Provider	Springer Nature Link
Author	Sivakumar, R.
Copyright Year	2016
Abstract	The background indoor gamma radiation in the residential places was estimated using CaSO$_{4}$:Dy-based thermoluminescent dosimeters. The indoor gamma dose varied from 71 to 327 nGy h$^{−1}$ with a mean value of 162 ± 31 nGy h$^{−1}$. The highest gamma dose was observed in summer and the lowest in winter. The indoor gamma radiation was also found to vary with the type of house and building materials used. Indoor radon, thoron and progeny levels were measured for different types of dwellings during four seasons of a year using LR 115 type II film-based solid state nuclear track detectors loaded in twin chamber plastic cups. The average highest radon, thoron and progeny were observed during winter, and the corresponding lowest values were observed during summer. The concentrations of radon, thoron and progenies were found to vary with the type of houses and building materials used. The highest values were observed in mud houses, and the lowest values were recorded in wooden houses. This observed variation may be attributed to changes in ventilation conditions and exhalation rate of $^{222}$Rn and $^{220}$Rn from the floor and walls of the houses. The effective dose received by the general public due to indoor gamma radiation was found to be 0.79 mSv y$^{−1}$ and the corresponding values due to radon, thoron were 1.02, and 0.54 mSv y$^{−1}$, respectively. The inhalation dose received by the general public of the study area was found to be lesser than the action limit of International Commission on Radiological Protection (ICRP), 2009.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	11
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-05-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	TLDs CaSO$_{4}$:Dy LR-115 Effective dose Seasonal variation Radon Thoron Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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