The path from geology to indoor radon

Florică, Ştefan; Burghele, Bety-Denissa; Bican-Brişan, Nicoleta; Begy, Róbert; Codrea, Vlad; Cucoş, Alexandra; Cătălina, Tiberiu; Dicu, Tiberius; Dobrei, Gabriel; Istrate, Andrei; Lupulescu, Alexandru; Moldovan, Mărioara; Niţă, D. C.; Papp, Botond; Pap, Istvan; Szacsvai, Kinga; Tenter, Ancuta Radu; Sferle, Teofana; Sàinz, Carlos

doi:10.1007/s10653-019-00496-z

Cited by 22 publications

(12 citation statements)

References 22 publications

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“…Other studies have examined variations in indoor‐radon concentrations both within and between different bedrock or sediment types and at different map scales in Norway (Smethurst et al, 2008; Sundal et al, 2004), Great Britain (Miles & Appleton, 2005), Oregon (Burns et al, 1998; Franczyk et al, 2018), Russia (Zhukovsky et al, 2012), Romania (Florică et al, 2020), and part of northern Kentucky (Hahn et al, 2015). The work described by Hahn et al (2015) is particularly relevant to this paper because it was a pilot project that provided the geological and statistical basis for the current geologically based radon‐potential map of Kentucky.…”

Section: Introductionmentioning

confidence: 99%

A Geologically Based Indoor‐Radon Potential Map of Kentucky

et al. 2020

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We combined 71,930 short‐term (median duration 4 days) home radon test results with 1:24,000‐scale bedrock geologic map coverage of Kentucky to produce a statewide geologically based indoor‐radon potential map. The test results were positively skewed with a mean of 266 Bq/m 3 , median of 122 Bq/m 3 , and 75th percentile of 289 Bq/m 3 . We identified 106 formations with ≥10 test results. Analysis of results from 20 predominantly monolithologic formations showed indoor‐radon concentrations to be positively skewed on a formation‐by‐formation basis, with a proportional relationship between sample means and standard deviations. Limestone (median 170 Bq/m 3 ) and dolostone (median 130 Bq/m 3 ) tended to have higher indoor‐radon concentrations than siltstones and sandstones (median 67 Bq/m 3 ) or unlithified surficial deposits (median 63 Bq/m 3 ). Individual shales had median values ranging from 67 to 189 Bq/m 3 ; the median value for all shale values was 85 Bq/m 3 . Percentages of values falling above the U.S. Environmental Protection Agency (EPA) action level of 148 Bq/m 3 were sandstone and siltstone: 24%, unlithified clastic: 21%, dolostone: 46%, limestone: 55%, and shale: 34%. Mississippian limestones, Ordovician limestones, and Devonian black shales had the highest indoor‐radon potential values in Kentucky. Indoor‐radon test mean values for the selected formations were also weakly, but statistically significantly, correlated with mean aeroradiometric uranium concentrations. To produce a map useful to nonspecialists, we classified each of the 106 formations into five radon‐geologic classes on the basis of their 75th percentile radon concentrations. The statewide map is freely available through an interactive internet map service.

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Section: Introductionmentioning

confidence: 99%

A Geologically Based Indoor‐Radon Potential Map of Kentucky

et al. 2020

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“…Two specific sites and a total of 30 individual buildings were considered for the present research study. The most common characteristic of the building sites was the high radon potential, identified in previous works (Cosma et al, 2013b;Burghele et al, 2019;Florică et al, 2020). As recommended by Groves-Kirkby et al (2006), all residences considered have been occupied for several years prior to the present study, thus the dissipative/diffusive effect of normal daily living, including the use of heating has been averted.…”

Section: Site Descriptionmentioning

confidence: 88%

“…Each building's airtightness level was determined using floors/walls exhalation measurements, detection of relevant radon leakages by grab sampling, identification of air flows movements by air flow test tubes and thermography cameras and rate of indoor CO 2 dispersion. The general working protocol has been described in previous works (Barnet et al, 2008;Cosma et al, 2015;Florică et al, 2020). An indoor air quality monitoring system named ICA, was developed by the Babeș-Bolyai research group (Tunyagi et al, 2020) and installed in house B1-B10 to record real-time properties (temperature (T), atmospheric pressure (p), relative humidity (RH), carbon monoxide (CO), carbon dioxide (CO 2 ), volatile organic compounds (VOC) and radon ( 222 Rn)) of the household environment for up to one year prior to mitigation works and continuously recorded data ever since.…”

Section: Measurementsmentioning

confidence: 99%

Comprehensive survey on radon mitigation and indoor air quality in energy efficient buildings from Romania

Burghele

Botoș

Beldean-Galea

et al. 2021

Science of The Total Environment

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…The second evaluation campaign involved a comprehensive radon detection of each building evaluating some aspects like building tightness, the soil geology, soil permeability, sources of indoor pollution, gamma dose radiation measurements of ground and building materials, the existence of HVAC system, etc. A series of information were collected from the inhabitants, as described in previous works [20]. The prototype measuring device described above was developed by a group of scientists from the Babeș-Bolyai University [21] and installed inside the analysed dwellings to record the indoor air properties (temperature, relative humidity, pressure, CO, CO 2 , VOCs and radon) in real-time for up to one year, in order to select 10 pilot house for mitigation measures.…”

Section: Radon Measurementsmentioning

confidence: 99%

1. Experimental Research of Mitigation Systems for Controlling and Reducing Radon Exposure in Residential Buildings

Mareș¹,

Cătălina²,

Istrate³

et al. 2020

Proceedings of International Conference Building Services and Energy Efficiency

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This article presents the results of implementing a series of methods to mitigate the increased level of radon in multiple existing homes. The subject of this study is represented by techniques and systems to be implemented in pilot houses. From the 1000 house 100 houses from Cluj, Iași, Sibiu, Timiș and Bucharest were selected for monitoring purposes. From these, only 10 were chosen for mitigation. The remediation techniques applied to these pilot houses were active / passive depressurization, local ventilation with heat recovery, centralized ventilation system with heat recovery and installation of a membrane resistant to radon dispersion. In this article one house from Timisoara, and another one from Cluj, were deeply described. The mitigation of the radon level was up to 90% compared to the level measured a year ago.

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The path from geology to indoor radon

Cited by 22 publications

References 22 publications

A Geologically Based Indoor‐Radon Potential Map of Kentucky

A Geologically Based Indoor‐Radon Potential Map of Kentucky

Comprehensive survey on radon mitigation and indoor air quality in energy efficient buildings from Romania

1. Experimental Research of Mitigation Systems for Controlling and Reducing Radon Exposure in Residential Buildings

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