Characterization of well skin using buildup test and radon as a tracer

Lin, Chi-Lun; Kuo, Tom Ming-Ching; Fan, Kai; Chen, Y.; Su, Ching‐Tzong; Lin, Tengjiao; Lee, C.; Hu, K.; Liu, C.; Liang, Hongbao; Tsai, Chen‐An; Chiang, C. J.

doi:10.1016/j.petrol.2011.07.009

Cited by 4 publications

(1 citation statement)

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“…Such changes could be anticipated because indoor radon concentration is heavily affected by variations in soil radon level and factors contributing to radon’s entry into buildings. Pressure gradients, soil moisture, ground cover, humidity, soil and building material porosity, indoor and outdoor temperatures, and other factors could all contribute to such indoor radon transients (Lin et al 2011; Turk et al 1996; Yarmoshenko et al 2018; Kuo and Tsunomori 2014; Zafrir et al 2013). Carmona and Kearfott (2019) also used the Coefficient of Determination ( R 2 ) for their analysis.…”

Section: Introductionmentioning

confidence: 99%

Radon Kinetics in a Basement Space Measured with Different Devices

2021

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Although indoor monitoring of radon and benchmarking of radon measurement devices remain important research topics, few intercomparisons of active radon measurement devices have been performed under realistic conditions, let alone dynamic ones enabling comparison of their transient behavior. Five different radon monitors were therefore placed in a poorly ventilated basement space under three different conditions: 24 h under a steady, elevated radon level, 24 h with fans turned on to produce a radon washout transient, and 9 d with fans turned off for a radon buildup transient. Resulting radon concentrations varied between ~200 and ~2,000 Bq m−3. Accuracy of the devices were evaluated using root-mean-square error, and ventilation data were fit to first order linear compartmental models. To more accurately model behaviors such as cyclic diurnal variations, the source term corresponding to entry of radon from soil into the basement was considered to be non-constant, as it is likely to vary drastically with both the indoor-outdoor pressure differential and soil concentration variations. The improved radon washout model fit very well with the measurements. Despite a wide variety in list prices, all devices performed similarly during transients and at different radon concentrations.

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