Seasonal emanation of radon at Ghuttu, northwest Himalaya: Differentiation of atmospheric temperature and pressure influences

Kamra, Leena

doi:10.1016/j.apradiso.2015.08.031

Cited by 12 publications

(7 citation statements)

References 31 publications

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“…This is due to dry soil ambient conditions registered during summer that facilitates the development of a vertical 222 Rn concentration gradient between the soil and the free atmosphere calculated by the 222 Rn flux model. The model reflects the positive correlation between 222 Rn exhalation from the soil and ambient air temperature and a negative correlation with high soil moisture observed in past studies [ Nazaroff and Nero , ; Morawska , ; De Martino and Sabbarese , ; Grossi et al ., ; Kamra , ]. In the GIC3 area there is a significant difference between the calculated high summer 222 Rn fluxes, which have an average value of 140 Bq m −2 h −1 for the reported years, and winter fluxes, which are typically 50% lower (Table ) due to the winter snow layer, present at these altitudes, which can prevent the 222 Rn exhalation form the soil [e.g., López‐Coto et al ., ].…”

Section: Resultsmentioning

confidence: 99%

Analysis of ground‐based ²²²Rn measurements over Spain: Filling the gap in southwestern Europe

et al. 2016

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Harmonized atmospheric 222Rn observations are required by the scientific community: these data have been lacking in southern Europe. We report on three recently established ground‐based atmospheric 222Rn monitoring stations in Spain. We characterize the variability of atmospheric 222Rn concentrations at each of these stations in relation to source strengths, local, and regional atmospheric processes. For the study, measured atmospheric 222Rn concentrations, estimated 222Rn fluxes, and regional footprint analysis have been used. In addition, the atmospheric radon monitor operating at each station has been compared to a 222Rn progeny monitor. Annual means of 222Rn concentrations at Gredos (GIC3), Delta de l'Ebre (DEC3), and Huelva (UHU) stations were 17.3 ± 2.0 Bq m−3, 5.8 ± 0.8 Bq m−3, and 5.1 ± 0.7 Bq m−3, respectively. The GIC3 station showed high 222Rn concentration differences during the day and by seasons. The coastal station DEC3 presented background concentrations typical of the region, except when inland 222Rn‐rich air masses are transported into the deltaic area. The highest 222Rn concentrations at UHU station were observed when local recirculation facilitates accumulation of 222Rn from nearby source represented by phosphogypsum piles. Results of the comparison performed between monitors revealed that the performance of the direct radon monitor is not affected by meteorological conditions, whereas the 222Rn progeny monitor seems to underestimate 222Rn concentrations under saturated atmospheric conditions. Initial findings indicate that the monitor responses seem to be in agreement for unsaturated atmospheric conditions but a further long‐term comparison study will be needed to confirm this result.

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Section: Resultsmentioning

confidence: 99%

Analysis of ground‐based ²²²Rn measurements over Spain: Filling the gap in southwestern Europe

et al. 2016

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“…The (ICRP) International Commission on Radiological Protection has therefore reviewed the higher value for the reference level for radon gas in dwellings from the level in the 2007 Recommendations of (600 Bq/m 3 ) to (300 Bq/m 3 ). The dissolved in soft tissues and dose rate due to alpharadiation in the lung formed from the radon gas inhalation samples is listed in Table (6 and 7) and calculated using equation (7). The average dissolved in soft tissues range from 0.0248 to 0.51 (nGyh -1 ).…”

Section: Resultsmentioning

confidence: 99%

“…Research has shown that drinking water which contains radon is far less harmful than breathing the gas. The health risk does not come from consuming the radon, but from inhaling the gas [7].…”

Section: Ways For Entering the Radon To Dwellingmentioning

confidence: 99%

The Estimation of Dose Relationships for the Inhalation of Radon and the Difference in Activities During the Year Using RAD7 in Iraq

Al-Bakhat¹,

Mohammed²,

Nafae³

et al. 2017

SJEE

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Exposure to radon and its daughters is one of the important contributions for radiation doses to the publics. In this study, concentrations of radon gas were measured in air at Al-Tuwaitha Nuclear Site and some surrounding areas. Measurements were achieved by RAD7 (radon detector), manufactured by DURRIDGE COMPANY Inc. Indoor radon concentration plays a vital role in the total effective dose in the indoor environments. The measurement of the indoor radon concentrations ranged from (4.96±4.4 to 102±25) Bq/m 3 this high value of radon has been found at Decommissioning Directorate /emergency room, which is lower than the action value recommended by the EPA (Environmental Protection Agency) which is (148 Bq/m 3 ) while the lowest value has been founded in the Central Laboratories Directorate \ models Room. These values were used to calculate the annual effective dose, the dose exposed to the soft tissues other than the lungs D soft tissue , the dose rate due to alpha-radiation D lung and the effective dose equivalent rate H eff . The values of the annual effective doses for 222 Rn inhalation by the people were calculated and ranged from (0.124992 to 2.5704) mSv/y these result are lower than the value of (10 mSv/y) recommended by the ICRP (International Commission on Radiological Protection). It has been observed that winter concentration of indoor radon are greater than summer concentrations. The higher amount in the winter is attributed to the observation that people normally keep their windows closed during the winter, allowing indoor radon concentrations to rise. The lower radon concentrations in the summer might occur because people often open their windows, allowing low-radon outside air to enter the home. The results from this study show that the region has background radioactivity levels within the natural limits.

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“…Temporal variations in 222 Rn activities in groundwater at the decadal timescale are associated with tectonic and cosmic drivers (Finkelstein et al 1998 ; Yan et al 2017 ). These overlay daily and seasonal cycles driven by environmental factors such as groundwater recharge-discharge cycles or temperature gradients (Choubey et al 2011 ; Kamra 2015 ). These complex dynamics in the aquatic environment result in variable 222 Rn activities in continental water resources, and hence human exposure to water-borne radiation.…”

Section: Introductionmentioning

confidence: 99%

Radon prevalence in domestic water in the Ría de Vigo coastal basin (NW Iberian Peninsula)

Ibánhez

Álvarez‐Salgado

Rocha

2023

Environ Sci Pollut Res

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The Ría de Vigo catchment is situated in the largest radon-prone area of the Iberian Peninsula. High local indoor radon (222Rn) levels are the preeminent source of radiation exposure, with negative effects on health. Nevertheless, information on radon levels of natural waters and the potential human exposure risks associated with their domestic use is very sparse. To elucidate the environmental factors increasing human exposure risk to radon during domestic water use, we undertook a survey of local water sources, including springs, rivers, wells, and boreholes, over different temporal scales. Continental waters were highly enriched in 222Rn: activities ranged from 1.2 to 20.2 Bq L−1 in rivers and levels one to two orders of magnitude higher were found in groundwaters (from 8.0 to 2737 Bq L−1; median 121.1 Bq L−1). The geology and hydrogeology of local crystalline aquifers support one order of magnitude higher 222Rn activities in groundwater stored in deeper fractured rock compared to that contained within the highly weathered regolith at the surface. During the mean dry season, 222Rn activities nearly doubled in most sampled waters in comparison to the wet period (from 94.9 during the dry season to 187.3 Bq L−1 during wet period; n = 37). Seasonal water use and recharge cycles and thermal convection are postulated to explain this variation in radon activities. The high 222Rn activities cause the total effective dose of radiation received from domestic use of untreated groundwaters to exceed the recommended 0.1 mSv y−1. Since more than 70% of this dose comes from indoor water degassing and subsequent 222Rn inhalation, preventative health policy in the form of 222Rn remediation and mitigation measures should be implemented prior to pumping untreated groundwater into dwellings, particularly during the dry period.

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Seasonal emanation of radon at Ghuttu, northwest Himalaya: Differentiation of atmospheric temperature and pressure influences

Cited by 12 publications

References 31 publications

Analysis of ground‐based ²²²Rn measurements over Spain: Filling the gap in southwestern Europe

Analysis of ground‐based ²²²Rn measurements over Spain: Filling the gap in southwestern Europe

The Estimation of Dose Relationships for the Inhalation of Radon and the Difference in Activities During the Year Using RAD7 in Iraq

Radon prevalence in domestic water in the Ría de Vigo coastal basin (NW Iberian Peninsula)

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Seasonal emanation of radon at Ghuttu, northwest Himalaya: Differentiation of atmospheric temperature and pressure influences

Cited by 12 publications

References 31 publications

Analysis of ground‐based 222Rn measurements over Spain: Filling the gap in southwestern Europe

Analysis of ground‐based 222Rn measurements over Spain: Filling the gap in southwestern Europe

The Estimation of Dose Relationships for the Inhalation of Radon and the Difference in Activities During the Year Using RAD7 in Iraq

Radon prevalence in domestic water in the Ría de Vigo coastal basin (NW Iberian Peninsula)

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Analysis of ground‐based ²²²Rn measurements over Spain: Filling the gap in southwestern Europe

Analysis of ground‐based ²²²Rn measurements over Spain: Filling the gap in southwestern Europe