Natural radionuclide content in building materials and gamma dose rate in dwellings in Cuba

Flores, O. Brígido; Estrada, Adelmo Montalván; Suárez, Ramón Rosa; Zerquera, J. Tomás; Pérez, Agustín

doi:10.1016/j.jenvrad.2008.08.001

Cited by 77 publications

(17 citation statements)

References 15 publications

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“…These results are relatively higher than the levels in previously investigated locally produced materials, particularly 238 U [21,22]. However, the activity concentrations of 238 U, 232 Th, and 40 K Bq/kg of ceramic samples in the present study are comparable, with slight variations with other studies in some countries [21,[23][24][25][26][27], as indicated in Table 2. Figure 1 shows a box-plot of 238 U, 232 Th, and 40 K activity concentrations, where the minimum, maximum, and means are presented.…”

Section: Radioactivity Contents In Ceramic Samplessupporting

confidence: 55%

Comparative Study of Natural Radioactivity and Radiological Hazard Parameters of Various Imported Tiles Used for Decoration in Sudan

Siddeeg

Suliman²,

Rebah

et al. 2018

Symmetry

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Various commercially imported ceramic materials used in the building of Sudanese dwellings were examined in order to determine their natural radioactivity and radiological hazard parameters. In this context, twenty-five different consignments were sampled and analyzed using (3 × 3 ) sodium iodide gamma spectrometry system NaI(Tl). The identified average activity concentrations of 238 U, 232 Th, and 40 K were 183 ± 70, 51 ± 44, and 238 ± 77 Bq/kg dry-weights, respectively. A positive correlation between 238 U and 232 Th in the investigated samples was identified from the observed significant correlation (R 2 = 0.8). Interestingly, a low Th/U ratio (~0.3) was recorded, which could be related to the systematic loss of thorium during the fabrication process. The measured activity concentrations for these radionuclides were comparable with the reported data obtained from similar materials used in other countries showing similarity in ceramic materials used in buildings. Five different radiation indices, such as the average radium equivalent (Ra eq ), the absorbed dose rate (D), the annual effective dose equivalent (AEDE), the external hazard index (H ex ), and the radioactivity level index (l γ ), which indicate hazardous radiation, were estimated from these measurements. The obtained results revealed average values of 274 ± 106 Bq/kg, 125 ± 48 nGy/h, 1.23 ± 0.48 mSv/y, 0.74 ± 0.29, and 0.94 ± 0.37, for Ra eq , D, AEDE, H ex , and l γ , respectively. The mean values of Ra eq and H ex were in good agreement with the international limits, while the means of D and l γ were higher than the universal values. Calculated AEDE in about 60% of the samples exceeded the universal limit of 1 mSv/y for the public exposure (maximum value of 2.16 mSv/y). The investigated parameters were in the same range for the majority of imported samples; however, they were slightly higher than the locally produced ceramic, highlighting the importance of monitoring imported materials for their radioactivity contents.

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Section: Radioactivity Contents In Ceramic Samplessupporting

confidence: 55%

Comparative Study of Natural Radioactivity and Radiological Hazard Parameters of Various Imported Tiles Used for Decoration in Sudan

Siddeeg

Suliman²,

Rebah

et al. 2018

Symmetry

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“…The obtained results were then compared with international standard values defined by the European Commission [ 4 ], and values recommended by the United Nations Committee on the Effects of Ionizing Radiation [ 1 , 24 ]. The results were also compared with results of studies performed by other authors from various countries all over the world [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Natural Radioactivity in Cements Used as Building Materials in Poland

Lewicka

Piotrowska

Łukaszek-Chmielewska

et al. 2022

IJERPH

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It has been analyzed in this article the radioactivity concentrations of 226Ra, 232Th, 40K and radiological hazard parameters in different types of cements commonly used in Poland and available on the Polish market. The radiological hazard parameters are, in particular, absorbed gamma dose rate, annual effective dose, radium equivalent activity, the external hazard index, and the gamma and alpha indices. The radionuclide activities of the most important radionuclides 226Ra, 232Th, 40K have been determined by gamma-ray spectrometry with the use of two kinds of spectrometers of different operational parameters. One performed also measurements on 30-day and 45-day aged samples as to verify if there is a statistically significant difference in radioactivity concentration for shorter and longer aging time. The radioactivity concentrations in the cement samples ranged from 21.7–75.7 Bq·kg−1 for 226Ra, 12.3–47.3 Bq·kg−1 for 232Th to 123–430 Bq·kg−1 for 40K. The radiological parameters in cement samples were calculated as follows: mean radium equivalent activity Raeq = 127 Bq·kg−1, mean absorbed gamma dose rate D = 115 nGy·h−1, mean annual effective dose E = 570 µSv·y−1, external hazard index Hex = 0.32, internal hazard index Hin = 0.51, mean activity concentration index Iγ = 0.47 and mean alpha index Iα = 0.28. The results were compared with the reported data from other countries and the international standard values given by European Commission (EC) and United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR 2000). Finally, thorough statistical analysis has been performed.

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“…The compar i son re sult showed that the Ra eq ob tained in the pres ent study is lower than that from most of Chi nese cit ies ex cept Baoji [9]. Com pared with those from other coun tries, the re sult is lower than that from Al geria [45], Aden, Ye men [38], Bangladeshi [46], and Bitlis, Tur key [35], but higher than that from Isparta, Tur key [33], Egypt [18,21], Punjab Prov ince, Pa kistan [27], Cuba [47], and Tamilnadu, In dia [41]. The di ver sity of ra dium equiv a lent ac tiv ity in red-clay bricks may be re lated to the geo log i cal lo ca tions and geo chem i cal prop er ties of those ma te ri als.…”

Section: Ra Dio Log I Cal Haz Ard As Sess Ment Re Sultsmentioning

confidence: 85%

Natural radioactivity and radiological hazard of red-clay brick produced in Shangluo, China

Zhuang

Xinwei

2020

NUCL TECH RAD PROT

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The radiological hazard of building materials originating from clay, rock and other mineral wastes has attracted more attention because they contain natural radionuclides (226Ra, 232Th, and 40K). The activity concentration of radionuclides in red-clay brick samples obtained from three different brickyards in Shangluo, China waHs measured. Various indexes, including radium equivalent activities, Raeq, external hazard index, Hex, internal hazard index, Hin, indoor air absorbed dose rate, D, and annual effective dose, AED, of the aforementioned radionuclides in the bricks were used to assess the radiation hazard for people. The average activity concentrations of 226Ra, 232Th, and 40K were respectively 34.5 ? 1.9, 62.5 ? 2.1, and 713.7 ? 19.8 Bqkg?1 for the studied red-clay bricks. The Raeq values of the red-clay brick samples varied from 167.0 to 184.7 Bqkg?1, which are lower than the limit of 370 Bqkg?1. Moreover, the activity concentrations of natural radionuclides in unfired brick, clay and coal were also determined and the results were compared with that in the red-clay brick samples. This study shows that the red-clay bricks produced in Shangluo, China can be used safely in construction industries.

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Natural radionuclide content in building materials and gamma dose rate in dwellings in Cuba

Cited by 77 publications

References 15 publications

Comparative Study of Natural Radioactivity and Radiological Hazard Parameters of Various Imported Tiles Used for Decoration in Sudan

Comparative Study of Natural Radioactivity and Radiological Hazard Parameters of Various Imported Tiles Used for Decoration in Sudan

Assessment of Natural Radioactivity in Cements Used as Building Materials in Poland

Natural radioactivity and radiological hazard of red-clay brick produced in Shangluo, China

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