EVALUATION OF INDOOR/OUTDOOR GAMMA EXPOSURE RATES AND EXCESS LIFE TIME CANCER RISK IN DIFFERENT CITIES OF PAKISTAN
Jahan Zeb1, Mohammad Wasim1, Muhammad Awais2
1Pakistan Institute of Nuclear Science and Technology, P.O. Nilore, Islamabad, Pakistan.
Abstract:
This study presents a detailed measurement of indoor and outdoor terrestrial gamma radiation levels in different cities of Pakistan. The measurements covered dwellings in 27 cities, covering all provinces and region of Azad Kashmir. Most of the houses were of attached type, made of brick walls and concrete roofs. The measurements were made by a handheld radiation survey meter containing Geiger-Muller tube. The average absorbed dose rate in air was 100 ± 32 nGy h-1 for indoor and 74 ± 30 nGy h-1 for outdoor. The population-weighted mean terrestrial dose rates were 90 nGy h-1 for indoor and 78 nGyh-1 for outdoor. The ratio of indoor to outdoor absorbed dose rate was 1.5 as compared to 1.3 for the world average. The estimated average annual effective dose rate was 0.58 ± 0.18 mSv a-1 and the mean excess life time cancer risk was 2.0 × 10-3.
More Related Videos
11:24Measuring DNA Damage and Repair in Mouse Splenocytes After Chronic In Vivo Exposure to Very Low Doses of Beta- and Gamma-Radiation
Published on: July 3, 2015
08:48Analysis of the Ambient Particulate Matter-induced Chromosomal Aberrations Using an In Vitro System
Published on: December 21, 2016
Related Concept Videos
Biological Effects of Radiation
Cancer Prevention
Some...
Mutagenicity and Carcinogenicity
Cancer Survival Analysis
Statistical Methods for Analyzing Epidemiological Data
