Estimation of radiation hazard indices from sedimentary rocks in Upper Egypt

Abbady, A.

doi:10.1016/j.apradiso.2003.09.012

Cited by 48 publications

(28 citation statements)

References 7 publications

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“…Fig. 1 The results obtained in this study are also in agreement with data reported for rocks from similar geological settings (Abbady, 2004;Ahmed et al, 2006). Uranium and thorium often share a common mineralogy, and this was tested through the evaluation of the mutual relationship between the isotopes included in their decay chains and analysed in the present study; the relationship with potassium through the 40 K isotope was also investigated.…”

Section: Resultssupporting

confidence: 83%

Radiological data on building stones from a Spanish region: Castilla y León

Pereira

Neves

et al. 2013

Nat. Hazards Earth Syst. Sci.

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Abstract. As construction and building material, natural stone has a great potential to promote the commercial activities of certain European regions. Such is the case of Castilla y León in Spain, where many different rocks, ranging from sedimentary to metamorphic and igneous, are commercialized for building purposes. However, to be able to compete in a market subject to an economic crisis, highly exacerbated in the construction sector, and to compete with the lower prices offered by emerging countries, the issue would be to make the Spanish offer more attractive. Here we propose a complete characterization of rocks regarding their radiological properties, which are related to their mineralogy and geochemistry. Rocks emit natural radioactivity, and the presence of Rn and its decay products in dwellings has become an important issue in North America and Europe owing to its relationship with the carcinogenic effects of this gas. Although most of the studied rocks comply with the I parameter proposed in the European Norm 112 for Radiological Protection (accepted value I ≤ 1; average for sedimentary rock: I = 0.22, SD 0.14; average for metamorphic rocks: I = 0.70, SD 0.48; average for igneous rock: I = 0.86, SD 0.22), the inclusion of a proper radiological characterization in the list of characteristics would guarantee quality and safety in their use in comparison with products lacking this information. Some natural stones have been demonized for the potential exhalation of natural radioactivity, and the different parameters used should be addressed in a more systematic way.

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Section: Resultssupporting

confidence: 83%

Radiological data on building stones from a Spanish region: Castilla y León

Pereira

Neves

et al. 2013

Nat. Hazards Earth Syst. Sci.

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“…1). Provided that clastic sediments contain considerably higher U concentrations than chemical sediments (UNSCEAR, 1993), along with the fact that radionuclide concentrations increase with increasing clay content (Abbady, 2004), it is suggested that the flysch formation outcropping at the eastern margins of the basin, is the most probable U source. Of course, supplementary radiological analyses in the rocks along the basin margin are needed in order to trace the exact U source in the Seam-I lignite.…”

Section: Palaeoenvironmental Reconstructionmentioning

confidence: 99%

Palaeoenvironment of Seam I in the Marathousa Lignite Mine, Megalopolis Basin (Southern Greece)

Siavalas

Linou

Chatziapostolou

et al. 2009

International Journal of Coal Geology

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“…The Ra equivalent is a weighed sum of activities of 226 Ra, 232 Th, and 40 K based on the assumption that 370 Bq kg -1 Ra, 259 Bq kg -1 Th, and 4810 Bq kg -1 K produce the same c-ray dose rates. To determine the Ra eq , the estimated equation by Abbady (2003) (Eq. 4) was used:…”

Section: Ra-equivalent Activitymentioning

confidence: 99%

Evaluation of Naturally Occurring Radioactive Materials (NORMs) in Inorganic and Organic Oilfield Scales from the Middle East

Bassioni

Abdulla

Morsy

et al. 2011

Arch Environ Contam Toxicol

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The distribution of natural nuclide gamma-ray activities and their respective annual effective dose rates, produced by potassium-40 (⁴⁰K), uranium-238 (²³⁸U), thorium-232 (²³²Th), and radium-226 (²²⁶Ra), were determined for 14 oilfield scale samples from the Middle East. Accumulated radioactive materials concentrate in tubing and surface equipment, and workers at equipment-cleaning facilities and naturally occurring radioactive materials (NORMs) disposal facilities are the population most at risk for exposure to NORM radiation. Gamma-spectra analysis indicated that photo-gamma lines represent the parents of 10 radioactive nuclides: ²³⁴Th, plutonium-239, actinium-228, ²²⁶Ra, lead-212 (²¹²Pb), ²¹⁴Pb, thallium-238 (²⁰⁸Tl), bismuth-212 (²¹²Bi), ²¹⁴Bi, and ⁴⁰K. These nuclides represent the daughters of the natural radioactive series ²³⁸U and ²³²Th with ⁴⁰K as well. The mean activity concentration of ²³⁸U, ²³²Th, and ⁴⁰K were found to be 25.8 ± 11.6, 18.3 ± 8.1, and 4487.2 ± 2.5% Bq kg⁻¹ (average values for 14 samples), respectively. The annual effective dose rates and the absorbed doses in air, both indoor and outdoor, for the samples were obtained as well. The results can be used to assess the respective hazard on workers in the field and represent a basis for revisiting current engineering practices.

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Estimation of radiation hazard indices from sedimentary rocks in Upper Egypt

Cited by 48 publications

References 7 publications

Radiological data on building stones from a Spanish region: Castilla y León

Radiological data on building stones from a Spanish region: Castilla y León

Palaeoenvironment of Seam I in the Marathousa Lignite Mine, Megalopolis Basin (Southern Greece)

Evaluation of Naturally Occurring Radioactive Materials (NORMs) in Inorganic and Organic Oilfield Scales from the Middle East

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