Seasonal Variation of Indoor Radon Concentration in the Tropics: Comparative studies between Kuala Lumpur, Malaysia and Kerala, India

AbstractThe present study aims to identify novel means of increasing the accuracy of the estimated annual indoor radon concentration based on the application of temporal correction factors to short-term radon measurements. The necessity of accurate and more reliable temporal correction factors is in high demand, in the present age of speed. In this sense, radon measurements were continuously carried out, using a newly developed smart device accompanied by CR-39 detectors, for one full year, in 71 residential buildings located in 5 Romanian cities. The coefficient of variation for the temporal correction factors calculated for combinations between the start month and the duration of the measurement presented a low value (less than 10%) for measurements longer than 7 months, while a variability close to 20% can be reached by measurements of up to 4 months. Results obtained by generalized estimating equations indicate that average temporal correction factors are positively associated with CO2 ratio, as well as the interaction between this parameter and the month in which the measurement took place. The impact of the indoor-outdoor temperature differences was statistically insignificant. The obtained results could represent a reference point in the elaboration of new strategies for calculating the temporal correction factors and, consequently, the reduction of the uncertainties related to the estimation of the annual indoor radon concentration.

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Study of the possibility of using radon potential maps for identification of areas with high indoor radon concentration

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-021-07673-4 ◽

2021 ◽

Author(s):

Martin Bulko ◽

Karol Holý ◽

Alžbeta Brandýsová ◽

Monika Müllerová ◽

Jozef Masarik

Keyword(s):

Radon Concentration ◽

Indoor Radon ◽

Indoor Radon Concentration ◽

Radon Potential

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Indoor radon concentration in the rural dwellings of Chhattisgarh state (India)

Radiation Protection Dosimetry ◽

10.1093/rpd/nci535 ◽

2006 ◽

Vol 119 (1-4) ◽

pp. 434-437 ◽

Cited By ~ 4

Author(s):

M. S. K. Khokhar ◽

R. S. Kher ◽

V. B. Rathore ◽

T. V. Ramachandran

Keyword(s):

Radon Concentration ◽

Indoor Radon ◽

Indoor Radon Concentration

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Seasonal indoor radon studies in buildings of Accra Metropolis of Greater Accra region of Ghana

Radioprotection ◽

10.1051/radiopro/2018023 ◽

2018 ◽

Vol 53 (3) ◽

pp. 199-206 ◽

Cited By ~ 2

Author(s):

F. Otoo ◽

E.O. Darko ◽

M. Garavaglia ◽

C. Giovani ◽

S. Pividore ◽

...

Keyword(s):

Radon Concentration ◽

Rainy Season ◽

Indoor Radon ◽

Dry Season ◽

Strong Positive Correlation ◽

Cumulative Frequency Distribution ◽

Indoor Radon Concentration ◽

Kolmogorov Smirnov ◽

Greater Accra Region ◽

Action Levels

Indoor radon concentration for annual, rainy and dry season have been studied in 228 buildings which includes bedroom, kitchen, sitting room, laboratories and offices in Accra metropolis of Greater Accra of Ghana. The passive radon CR-39 SSNTD was used for this study. The cumulative frequency distribution, normalizing Q-Q plots, Kolmogorov-Smirnov and Shapiro-Wilk statistical test showed that the result of both workplaces and dwellings are not normally distributed. The strong positive correlation between the two seasons occurred at 95% confidence level with 2 tailed. The rainy season recorded highest coefficient variation of r2 = 0.982. Statistical analysis of median (39.3), AM (103.4), GM (57.9) and GSD (3.2) for rainy season were greater than that of the dry season of median (26.9), AM (88.2), GM (49.2) and GSD (2.8) respectively. Rainy season was found to contain high radon concentrations than the dry season for all the studied locations. In general, workplace had radon concentration far greater than dwellings. The results obtained from this study ranged between 13.6 to 533.7 Bq/m3, out of which 9.6%, 12.7% and 3.5% were found to be greater than action levels proposed by WHO, EC and ICRP.

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