Indoor radon levels were measured in different seasons throughout 1995 in selected dwellings of coastal Karnataka using LR-115 type II peelable films.
Seasonal variations were studied.
The arithmetic mean value of radon levels during winter was found to be about 35% higher than the annual average value.
The annual average radon levels were found to vary from 45.4 to 65.0 Bq m-3 with an arithmetic mean value of 56.3 Bq m-3.
The annual effective dose equivalent to the population of the region due to inhalation of radon was found to be in the range 0.78-1.12 mSv y-1 with a mean value of 0.97 mSv y-1.
A moderate positive correlation was observed between indoor radon levels and radium content in the underlying soil, while a weak negative correlation was found to exist between indoor radon levels and indoor gamma dose rates in air.
These results are discussed and possible inferences are drawn.
Mots-clés Pascal : Radon, Rn 222, Emission atmosphérique, Contamination, Radionucléide, Bâtiment, Karnataka, Inde, Asie, Variation saisonnière, Radioactivité, Radium, Sol, Pollution intérieur, Détecteur, Trace nucléaire, LR-115, Dosimétrie
Mots-clés Pascal anglais : radon, Rn-222, atmospheric emission, contamination, radionucleids, buildings, Karnataka India, India, Asia, seasonal variations, radioactivity, radium, soils
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0207519
Code Inist : 001E01O04. Création : 11/09/1998.