Measurements of Radon and Thoron Concentrations in High Radiation Background Area using Pin Hole Dosimeter

7th International Conference on High Levels of Natural Radiation and Radon Areas(7HLRRA

Measurements of radon and thoron concentrations in high radiation background area using pin-hole dosimeter

In present investigation, newly designed twin cup pin-hole dosimeter with LR-115 track detector has been used for the integrated measurements of radon and thoron in the environmental air of a high background radiation area in coastal Orissa. The twin cup dosimeters were calibrated before installation in the field. The calibration experiment was made in an inter calibration exercise at NIRS, Chiba, Japan.The resulting calibration factors were used to obtain the values of radon and thoron in the study area. Radon and thoron concentrations in the houses of study area were found to vary from 24 Bq/m3 to 98 Bq/m3 and 46 Bq/m3 to 689 Bq/m3, respectively. The indoor and outdoor gamma dose rates in the study areavary from 0.124 mGy/h to 0.257 mGy/h and 0.109 mGy/h to 0.361 mGy/h, respectively. The annual effective dose due to the exposure to indoor radon and progeny was found to vary from 0.70 mSv to 2.84 mSv with an average value of 1.73 mSv. However, the annual effective dose due to the exposure to thoron andprogeny was found to vary from 1.16 mSv to 17.36 mSv with an average value of 7.36 mSv. Thoron concentration and gamma dose rate were found relatively higher in the area

Distribution of terrestrial gamma dose rate in the eastern coastal area of Odisha, India

International Symposium on Natural Radiation Exposures and Low Dose Radiation Epidemiological Studie

DISTRIBUTION OF TERRESTRIAL GAMMA RADIATION DOSE RATE IN THE EASTERN COASTAL AREA OF ODISHA, INDIA

International Symposium on Natural Radiation Exposures and Low Dose Radiation Epidemiological Studie

PRELIMINARY INDOOR THORON MEASUREMENTS IN HIGH RADIATION BACKGROUND AREA OF SOUTHEASTERN COASTAL ORISSA, INDIA

INTERNATIONAL WORKSHOP on the ENVIRONMENTAL THORON AND RELATED ISSUE

PRELIMINARY INDOOR THORON MEASUREMENTS IN HIGH RADIATION BACKGROUND AREA OF SOUTHEASTERN COASTAL ORISSA, INDIA

INTERNATIONAL WORKSHOP on the ENVIRONMENTAL THORON AND RELATED ISSUE

Levels of thoron and its progeny in high background radiation area of southeastern coast of Odisha, India

International Symposium on Natural Radiation Exposures and Low Dose Radiation Epidemiological Studie