Studying temporal variations of indoor radon as a vital step towards rational and harmonized international regulation

Temporal uncertainty versus coefficient of variation for rational regulation of indoor radon

“…Since U V and U D are the main and independent components of the combined uncertainty U(C), the condition (7) can be presented in more detail as a criterion for conformity assessment of a room with a norm 5,6 :$$$$ \mathrm{C}\left(\mathrm{t}\right)\cdotp \left[1+\sqrt{{\mathrm{U}}_{\mathrm{V}}{(t)}^2+{{\mathrm{U}}_{\mathrm{D}}}^2}\right]<{\mathrm{C}}_{\mathrm{RL}},\mathrm{providing}\ \mathrm{probability}\ \mathrm{of}\ 95\% $$$$ Assuming U D = 0 in, (8) and considering (4) and, (6) then for the case of log‐normal distribution we obtain equations connecting GSD and COV to the temporal uncertainty of indoor radon:$$$$ {\mathrm{U}}_{\mathrm{V}}={\mathrm{GSD}}^2\cdotp \exp \left[0.5\cdotp {\ln}^2\left(\mathrm{GSD}\right)\right]\hbox{--} 1,\mathrm{and} $$$$ $$$$ {\mathrm{U}}_{\mathrm{V}}={\left(\mathrm{COV}+1\right)}^2\cdotp \exp \left[0.5\cdotp {\ln}^2\left(\mathrm{COV}+1\right)\right]\hbox{--} 1. $$$$ Obviously, for the normal distribution:$$$$ {\mathrm{U}}_{\mathrm{V}}=2\cdotp \mathrm{SD}/\mathrm{AM}=2\cdotp \mathrm{COV}.$$…”

“…42 b Derived from the other UK results. 42 According to the expression of the lower limit of the interval for log-normal distribution (GM/GSD 2 ) and taking into account (5), RL in the test room will not be exceeded with a probability of 95%, if the measurement result C meets the condition:…”

“…Since U V and U D are the main and independent components of the combined uncertainty U(C), the condition ( 7) can be presented in more detail as a criterion for conformity assessment of a room with a norm 5,6 :…”

“…To clarify, radon concentration was also monitored in ER6, which had very low air exchange (an average of 0.1 h −1 ), so it was excluded from the analysis; b. Publication, 5 including the results of the annual monitoring of radon concentrations available to the authors in 12 experimental rooms located in 9 Israeli buildings; c. Publication, 34 including the data with COV in the text and GSD in Table 4 34 based on studies in 326 Finnish buildings; d. Publication, 22 including the data with COV in Table 3 22 based on studies in 75 buildings located in US (Minnesota).…”

“…Thus, the budget of AAIR uncertainty must include both temporal and instrumental uncertainties if the measurement duration is shorter than 1 year. In most cases, when the test duration is less than half a year, the AAIR temporal uncertainty plays a key role 5 • The implementation of the proposed approach within ISO/IEC could serve as a basis for creating rational and harmonized indoor regulation in different countries strategies to select the most reliable and efficient measurement protocol. Accordingly, it seems impossible to create a harmonized international standard based on rationality.…”