Assessment of dose due to exposure to indoor radon and thoron progeny

The components of the effective dose through inhalation from radon and its progeny are important for human health since they contribute to more than 50% of the total radiation dose from natural sources. As a consequence, radon has been identified as the second leading cause of lung cancer after smoking. Radon and its short lived decay products (218Po, 214Pb, 214Bi, 214Po) present in dwellings are a radiation hazard, particularly if such sources are concentrated in the enclosed areas like poorly ventilated houses and underground mines. The indoor radon, thoron, and progeny concentrations were measured in a small hilly town of Budhakedar and the surrounding area of Tehri Garhwal, India, by using LR-115 Type II plastic track detector in a twin cup radon dosimeter. The concentrations of radon progeny were measured as the highest in winter and the lowest in summer while the thoron progeny concentration was found maximum in rainy season and minimum in autumn. The annual exposure to the potential alpha energy of radon and thoron were found to vary from 0.04 WLM to 0.69 WLM with an average value of 0.29 WLM, and 0.03 WLM to 0.37 WLM with an aver- age value of 0.16 WLM, respectively. The annual effective dose due to the exposure to indoor radon and progeny in Budhakedar homes was found to vary from 0.16 mSv to 2.72 mSv with an average value of 1.14 mSv and the effective dose due to the exposure to thoron and progeny was found to vary from 0.18 mSv to 2.49 mSv with an average value of 1.05 mSv. The results of systematic study have been obtained by considering the room as a space in which the radon and thoron levels are directly related to the dynamic and static parameters

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

Particle Size Distribution Measurement of indoor Air Aerosol at Dwellings in a High Background Radiation Area in Orissa, India

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

Natural Radionuclide Analysis in Chattrapur Area of Southeastern Coastal Area of Odisha, India

The energy released in a spontaneous decay process of naturalradionuclides is the main source of the total radiation dose to humanbeings. Natural radionuclides are widely distributed in soil, rocks, air,and groundwater. In present investigation, the analysis of terrestrialradionuclides such as 226Ra, 232Th, and 40K in soil and sand of Chattarpurarea of southeastern coast of Odisha has been carried out using NaI(Tl)gamma ray detector. The higher activity concentrations of naturallyoccurring radionuclides have been reported from the study area. Thegamma radiationdose originating from the terrestrial radionuclides wasfound to vary from 95 to 1813 nGy/h with an average of 700 nGy/h. Thisstudy is important to generate a baseline data of radiation exposure in thearea. Health hazard effects due to natural radiation exposure arediscussed in details

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

Thorium as well as rare earth elements in air particulates of a natural high background radiation area in India

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

Measurement of thorium and uranium activity with rare earth elements in soil samples near Chhatrapur, Orissa, India a natural high background radiation area

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