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Indoor and Built Environment
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Seasonal Variation of Indoor Gamma Dose and Radon, Thoron Measurement in the Dwellings around Kudankulam Nuclear Power Plant (Radhapuram Taluk, Tirunelveli District)

G.M. Brahmanandhan

Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University, India

S. Selvasekarapandian

Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University, India, sekarapandian{at}yahoo.com

J. Malathi

Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University, India

D. Khanna

Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University, India

V. Meenakshisundaram

Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University, India

S. Santhanam

Radiological Safety Section, Health Physics Division, Indira Gandhi Center for Atomic Research Kalpakkam- 603 102, India

S. Balasundar

Radiological Safety Section, Health Physics Division, Indira Gandhi Center for Atomic Research Kalpakkam- 603 102, India

B. Dhanalakshmi

Radiological Safety Section, Health Physics Division, Indira Gandhi Center for Atomic Research Kalpakkam- 603 102, India

Indoor gamma dose and indoor radon, thoron and their progeny concentrations have been measured around the upcoming Kudankulam Nuclear Power Plant i.e., in the Radhapuram taluk. The measurements have been carried throughout a year to account for the seasonal variation of indoor gamma dose and indoor radon, thoron, and their progeny concentrations. Indoor gamma dose value is found to be maximum in the summer season (459.2 ± 82.3 nGy·h-1). Indoor radon, thoron and their progeny concentration are found to be maximum in the winter season. The annual effective dose due to indoor gamma radiation to the Radhapuram population is found to be 1.5 mSv. The total annual inhalation dose arising due to radon, thoron, and their progeny concentrations to population is found to be 1.03mSv in Radhapuram taluk.

Key Words: Nuclear power plant • Indoor gamma dose • Radon and thoron

Indoor and Built Environment, Vol. 17, No. 4, 384-389 (2008)
DOI: 10.1177/1420326X08094817
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