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Volume 6, 2011 - Number 1
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DETERMINATION OF LEVEL OF RADIOACTIVITY AND EVALUATION OF RADIATION HAZARDOUS NATURE OF THE RECENTLY EXCAVATED RIVER SEDIMENTS
Venkidasamy RAMASAMY1*, Pachamuthu RAJKUMAR2, Govindasamy SURESH3, Venkatasubramanian MEENAKSHISUNDARAM4, & Velladurai PONNUSAMY5
1 Department of Physics, Annamalai University, Annamalainagar, Tamilnadu, India 2 Department of Physics, Pavai Engineering College, Pachal, Namakkal, Tamilnadu, India 3 Department of Physics, Thiruvalluvar College of Engineering and Technology, Vandavasi, Tamilnadu, India 4 Health and Safety Division, IGCAR, Kalpakkam, Tamilnadu, India. 5Department of Physics, MIT Campus, Anna University, Chennai, Tamilnadu, India. * Corresponding author E-mail: srsaranram@rediffmail.com DETERMINATION OF LEVEL OF RADIOACTIVITY AND EVALUATION OF RADIATION HAZARDOUS NATURE OF THE RECENTLY EXCAVATED RIVER SEDIMENTS Full text
Abstract:
Gamma radiation measurements were performed using high resolution HpGe detector for sediment (sand) samples collected from various sites of Vellar River, Tamilnadu. The concentration and distribution of 238U, 232Th and 40K were investigated with an aim of an evaluating radiation hazards to mankind, when it is used for building construction. The mean activity concentration values for 238U, 232Th and 40K were found to be 15.14±1.75 Bqkg-1, 29.76±4.49 Bqkg-1 and 135.05±16.03 Bqkg-1 respectively. These values are fall within range of typical world values. To assess the radiological hazards of river sediments, the absorbed and observed dose rate, annual effective dose (outdoor and indoor) equivalence, radium equivalence (Raeq), radiation heat production (RHP) rate, hazard indices (Hex and Hin) and gamma index are calculated. The radiological hazard indices are below the internationally recommended values. Thus, sediments of Vellar River do not pose a significant radiological threat to the population when it is used for construction of buildings. |
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