Natural and artificial gamma-emitting radionuclides in volcanic soils of the Western Canary Islands

López‐Pérez, María; Martín-Luis, M. C.; Hernández, Francisco; Liger, E.; Fernández-Aldecoa, J.C.; Lorenzo-Salazar, José M.; Hernández-Armas, J.; Salazar, Pedro

doi:10.1016/j.gexplo.2021.106840

Cited by 10 publications

(4 citation statements)

References 55 publications

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“…High activity concentrations were observed due to the volcanic nature of Lesvos, Greece (90 Bq kg −1 for 226 Ra, 190 Bq kg −1 for 232 Th, 960 Bq kg −1 for 40 K, and 70 Bq kg −1 for 137 Cs) [46]. In addition, in a study performed in Western Canary Islands (Spain), which has a basaltic and felsic volcanic rock structure, activity concentrations 40 K, 226 Ra and 232 Th were determined as in the range of 52.0-1240.1, 7.0-71.0, 8.1-147.5 Bq kg −1 , respectively [47]. 6 and Fig.…”

Section: Resultsmentioning

confidence: 99%

Natural and Artificial Radioactivity Concentrations and Health Risks due to Radionuclides in the Soil of Nevşehir (Cappadocia)

Özden,

Pehli̇vanoğlu

2023

International Journal on Applied Physics and Engineering

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Natural and artificial radionuclides in the surface soil samples collected from the Nevşehir (Cappadocia) region were analyzed using gamma spectrometry employing an HPGe detector. Activity concentrations of 226Ra, 232Th, and 40K range from 58.31 to 77.40 Bq kg−1, 60.56 to 90.97 Bq kg-1, and 796.42 to 1142.8 Bq kg-1, respectively. The values indicate that the activity concentrations of the natural radionuclides in the soil samples were higher than the world average. Since Turkey is a country greatly affected by the Chernobyl accident, 137Cs activity concentration was measured to determine whether its effect continues. The activity concentration of 137Cs ranges from Minimum Detectable Activity (MDA) to 6.88 Bq kg−1. In addition, the radium equivalent activity, the absorbed dose rate, the annual effective dose equivalent, and the excess lifetime cancer risk parameters were calculated to determine the radiological effect of natural and artificial radionuclides on the population in the study area. All values except the radium equivalent activity were found to be above the world average.

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Section: Resultsmentioning

confidence: 99%

Natural and Artificial Radioactivity Concentrations and Health Risks due to Radionuclides in the Soil of Nevşehir (Cappadocia)

Özden,

Pehli̇vanoğlu

2023

International Journal on Applied Physics and Engineering

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“…However, intermediate and felsic rocks such as trachyandesite, basaltic-andesite, andesite, trachytes, phonolites, and peralkaline rhyolites contain higher concentrations of radioactive elements (Faure 2005 ). From the radiological point of view, the reader may find more information in previous works of the group (López-Pérez et al 2021 ). In the last work, terrestrial gamma absorbed dose rates as well as the spatial distribution of gamma-emitting radionuclides 40 K, 226 Ra, and 232 Th and 137 Cs in soils of the Western Canary Islands were presented.…”

Section: Methodsmentioning

confidence: 99%

Determination of the indoor radon concentration in schools of Tenerife (Canary Islands): a comparative study

López‐Pérez

Hernández

Dı́az

et al. 2022

Air Qual Atmos Health

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A radon survey was carried out in 18 high schools located in Tenerife Island when anti-pandemic strategies were used to reduce COVID-19 dissemination during 2021. High schools were located in radon-prone areas previously identified by the Spanish Nuclear Safety Council. Our results showed that 12 high schools presented radon activities lower than 100 Bq/m3, 5 high schools presented values in the range 100–200 Bq/m3, and only 1 high school presented radon activity concentration higher than 200 Bq/m3. Such values are below the reference level (300 Bq/m3) recommended by the Spanish legislation in the Basics Document of Health Standards (section HS6) of the Technical Building Code and the European Union directive (2013/59/EURATOM). Assuming an indoor occupancy time of about 1620 h per year, the annual dose contribution due to indoor radon exposure ranged from 0.07 to 1.18 mSv/year. Comparing such result against previous values reported in the literature on the island of Tenerife, we conclude that during the pandemic situation the indoor radon concentration (median valued) was reduced from 130.9 (2007) to 73.5 (2021) Bq/m3. Finally, continuous indoor radon concentration measurements were obtained to study short-time fluctuations (intra-day changes) under different ventilation conditions.

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“…Therefore, the different origin of such caves and the chemical composition of the soils and the bedrock may change the presence of natural radionuclides such as Uranium ( 238 U) and 226 Ra, and hence the radon emissions. Even in the same volcanic territory, depending on the geological evolution of the lavas, it is possible to find large differences in the concentration of these radionuclides (López‐Pérez et al., 2021 ), and hence in the radon emissions rate.…”

Section: Introductionmentioning

confidence: 99%

Radon Dynamics and Effective Dose Estimation in a Touristic Volcanic Cave: La Cueva del Viento, Tenerife (Canary Islands, Spain)

et al. 2023

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La Cueva del Viento is a volcanic lava tube located in Tenerife Island (Canary Islands, Spain). Its touristic section, 180 m long, receives more than 28,200 visitants each year. According to the European and Spanish legislation, a radon monitoring program is required to minimize the radon exposition of workers, tourists, and cavers. In this work, we studied the radon concentration dynamics in the touristic section of the cave for ca. 1 year, using both passive and active radon detectors. Pluviometry and external air temperature played an important role in the seasonal and daily variations of indoor radon concentrations. Daily fluctuations during the dry season were analyzed using time series (Box‐Jenkins methodology) and frequency analysis (Fourier and Wavelet transforms) methods. The experimental radon time‐series was well‐fitted using a seasonal autoregressive integrated moving average model: Seasonal Auto‐Regressive Integrated Moving Average (2,0,1) (2,1,0) 24 , and its value, in a short‐time window (ca. 1 week) was conveniently forecasted. Finally, this work revealed that the annual effective doses received, during the observation period (1 year), by the touristic guides and visitors was ca. 2 mSv/yr and 4 μSv/hr, respectively. We concluded that the touristic exploitation of La Cueva del Viento is safe for both tourists and guides. However, based on our results, La Cueva del Viento had to be classified as a “Monitoring zone” and a regular monitoring program should be implemented.

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Natural and artificial gamma-emitting radionuclides in volcanic soils of the Western Canary Islands

Cited by 10 publications

References 55 publications

Natural and Artificial Radioactivity Concentrations and Health Risks due to Radionuclides in the Soil of Nevşehir (Cappadocia)

Natural and Artificial Radioactivity Concentrations and Health Risks due to Radionuclides in the Soil of Nevşehir (Cappadocia)

Determination of the indoor radon concentration in schools of Tenerife (Canary Islands): a comparative study

Radon Dynamics and Effective Dose Estimation in a Touristic Volcanic Cave: La Cueva del Viento, Tenerife (Canary Islands, Spain)

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