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Title: Measurement of radon activity, exhalation rate and radiation doses in fly ash samples from NTPC Dadri, India
Authors: Gupta, Mamta
Mahur, A K
Sonkawade, R G
Verma, K D
Prasad, Rajendra
Keywords: Radon
Fly ash
LR-115 type II SSNTDs
Radon exhalation rate
NTPC Dadri
Issue Date: Jul-2010
Publisher: CSIR
Abstract: Radon activities and radon exhalation rates have been measured in fly ash samples from NTPC (National Thermal Power Corporation), Dadri situated in Uttar Pradesh, using “Can technique”. This technique employs LR-115 type II solid state nuclear track detectors fixed at the top of the “Can” filled with fly ash samples. Radon activity has been found to vary from (222.56 ± 25.8) to (673.68 ± 45.1) Bqm-3 with an average value of (431.71 ± 35.5) Bqm-3. Surface exhalation rate has been found to vary from (80 ± 9) to (243 ± 16) mBqm-2h-1 with an average value (155 ± 13) mBqm-2 h-1, whereas mass exhalation rate has been found to vary from (3.1 ± 0.4) to (9.34 ± 0.6) mBq kg-1h-1 with an average value of (5.98 ± 0.5) mBqkg-1h-1. Indoor inhalation exposure (radon) effective dose has also been estimated which is found to vary from (5.8 ± 0.7) to (17.6 ± 1.2) Svy-1 with an average value of (11.3 ± 0.9) Svy-1.
Page(s): 520-523
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(07) [July 2010]

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