Health Risk Implications of Terrestrial Gamma Radiation Dose Rate in Central Jakarta, Indonesia: Short Communications

Abstract

Terrestrial gamma radiation (TGR) dose rate measurement has been conducted around downtown region of Central Jakarta Indonesia. The real time count data was taken 1 m above the ground in eight sub district locations by using a portable gamma Survey meter of Exploranium GR-135 Plus Model. The reading position was determined by Garmin GPSMAP 62s. The average value of TGR dose rate of (47.76 ± 18.24) nSv h -1 ranged from 6.40 nSv h -1 to 120.90 nSv -1 , it is higher than in Indonesia average. The annual effective dose rate of 0.06 mSv contributes to fatal cancer risk of about 3.32 x 10 -6 per year for each individual in Central Jakarta. For the subdistrict TGR dose rate value was varied, however all the result is not high enough to cause for alarm.