Estimation of EEC, unattached fraction and equilibrium factor for the assessment of radiological dose using pin-hole cup dosimeters and deposition based progeny sensors
“…48 . The estimated dose is greater than average worldwide dose of 1.26 mSv a −1 for 222 Rn 46,50 . The present approach followed dosimetric approach rather than epidemiological approach.…”
Section: Resultsmentioning
confidence: 78%
“…12. A correlation between and F Rn has been already studied in the past studies 45,46 .Figure 12Relation between X Rn (h −1 ) and F Rn .…”
Section: Resultsmentioning
confidence: 84%
“…48 mSvUNSCEAR 37 mSvBangotra et al . 46 mSvMin11.61.91.20.51.61.80.71.3Max43.67.04.61.85.96.92.64.8Avg21.53.42.30.92.93.41.32.4…”
This study summarizes the seasonal experimental data on the activity concentrations of indoor
222
Rn (Radon),
220
Rn (Thoron) and their progeny in Mansa and Muktsar districts of Punjab (India) using LR-115 solid state nuclear track detector based time integrated pin-hole cup dosimeters and deposition based progeny sensors for the assessment of radiological dose. The indoor
222
Rn concentration was observed higher in the rainy and winter seasons while
220
Rn concentration was observed higher in the winter season. However, Equilibrium Equivalent Concentrations (EECs) of
222
Rn and
220
Rn exhibited distinct seasonal behaviour unlike their parent nuclides. The average equilibrium factors for
222
Rn (F
Rn
) and
220
Rn (F
Tn
) were found 0.47 ± 0.1 and 0.05 ± 0.01, respectively. The annual arithmetic means of unattached fractions of
222
Rn (
) and
220
Rn (
) were found to be 0.09 ± 0.02 and 0.10 ± 0.02, respectively. The attachment rate (
X
Rn
) and attachment rate coefficients (
β
) of
222
Rn progeny were also calculated to understand the proper behaviour of progeny species in the region. A new alpha flux based technique has been proposed and used for the assessment of absorbed dose rate and annual effective dose rate for radiation protection purpose.
“…48 . The estimated dose is greater than average worldwide dose of 1.26 mSv a −1 for 222 Rn 46,50 . The present approach followed dosimetric approach rather than epidemiological approach.…”
Section: Resultsmentioning
confidence: 78%
“…12. A correlation between and F Rn has been already studied in the past studies 45,46 .Figure 12Relation between X Rn (h −1 ) and F Rn .…”
Section: Resultsmentioning
confidence: 84%
“…48 mSvUNSCEAR 37 mSvBangotra et al . 46 mSvMin11.61.91.20.51.61.80.71.3Max43.67.04.61.85.96.92.64.8Avg21.53.42.30.92.93.41.32.4…”
This study summarizes the seasonal experimental data on the activity concentrations of indoor
222
Rn (Radon),
220
Rn (Thoron) and their progeny in Mansa and Muktsar districts of Punjab (India) using LR-115 solid state nuclear track detector based time integrated pin-hole cup dosimeters and deposition based progeny sensors for the assessment of radiological dose. The indoor
222
Rn concentration was observed higher in the rainy and winter seasons while
220
Rn concentration was observed higher in the winter season. However, Equilibrium Equivalent Concentrations (EECs) of
222
Rn and
220
Rn exhibited distinct seasonal behaviour unlike their parent nuclides. The average equilibrium factors for
222
Rn (F
Rn
) and
220
Rn (F
Tn
) were found 0.47 ± 0.1 and 0.05 ± 0.01, respectively. The annual arithmetic means of unattached fractions of
222
Rn (
) and
220
Rn (
) were found to be 0.09 ± 0.02 and 0.10 ± 0.02, respectively. The attachment rate (
X
Rn
) and attachment rate coefficients (
β
) of
222
Rn progeny were also calculated to understand the proper behaviour of progeny species in the region. A new alpha flux based technique has been proposed and used for the assessment of absorbed dose rate and annual effective dose rate for radiation protection purpose.
“…Thoron equilibrium factors (F) therefore involve large uncertainties and measurements of thoron gas concentration are not suitable for dose assessment purposes (UNSCEAR, 2000(UNSCEAR, , 2006. Dose assessment should rather be based on direct measurements of TnP (Bangotra et al, 2015;Janik et al, 2013;Mayya et al, 2012;Mishra and Mayya, 2008).…”
“…Radon concentrations reported by Bangotra et al. 16 in naturally ventilated dwellings ranged from 21 to 94 Bq/m 3 , while the average sum of unattached and attached decay products amounted to 25 Bq/m 3 .…”
The study reports measurements of radon and its decay products and of perceived air quality carried out in an occupied and unoccupied auditorium at the Lublin University of Technology in Lublin, Poland during three air conditioning system operation modes – air conditioning off, air conditioning on and air conditioning on/off. In the air conditioning on/off mode radon and its decay product concentrations and values of perceived air quality were inversely related. During that air conditioning operation mode, the value of the mean equilibrium factor F for the unattached fraction (0.31 ± 0.19) was somewhat higher than for the attached fraction (0.24 ± 0.19) and significant negative correlations were found between F values for attached, unattached and for the sum of both progeny fractions and perceived air quality values. These findings may be of importance as they indicate that in certain air conditioning operation modes indoor air quality deteriorates along with a reduction in the radon health hazard. This, in turn may adversely affect the comfort and productivity of the room users.
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