An extensive indoor 222Rn/220Rn monitoring in North-East India

Assessment of Seasonal Variation of Indoor Radon Level in Dwellings of Some Districts of Azad Kashmir, Pakistan

“…This is higher than the values reported for many other countries, like in the case of United States and United Kingdom, the reported values of radon arithmetic mean concentration are about 46.25 and 20 BqÁm -3 [35]. Similarly, values reported for some parts of India, namely Himachal Pradesh (45 BqÁm À3 ), Assam (42 BqÁm À3 ) and Meghalaya (68 BqÁm À3 ) [36] are all lower than the one reported in this study. In Pakistan, for North West Frontier Province, the reported value for average indoor radon levels is $65 BqÁm À3 [16].…”

Long-term measurements of residential radon, thoron, and thoron progeny concentrations around the Chhatrapur placer deposit, a high background radiation area in Odisha, India

“…2, frequency distributions of radon, thoron and thoron progeny concentrations are shown. They do not have a normal distribution similar to reports from other surveys (e.g., Chen et al, 2011;Dwivedi et al, 2005;McLaughlin et al, 2011;UNSCEAR, 2000;Yamada et al, 2006). Further analysis based on the Shapiro-Wilk test reveals a log-normal distribution for radon and thoron concentrations during the rainy season (W-values: 0.59 and 0.13, respectively) and thoron progeny concentration during the autumn-winter and rainy seasons (W-values: 0.55 and 0.57, respectively).…”

Standardization and difficulties of the thoron exhalation rate measurements using an accumulation chamber

“…Nowadays, the significance of thoron has been recognized and interest on the measurement of the indoor thoron concentration is growing (Dwivedi et al, 2005;Pennington, 2006;Harley et al, 2005;Tokonami, 2005;Yonehara et al, 2005). In some cases, when thoron exhalation is high, exposure to thoron may be even higher than exposure to radon .…”