Radioactivity of building materials in Mahallat, Iran – an area exposed to a high level of natural background radiation – attenuation of external radiation doses

A. Shahrokhi; M. Adelikhah; S. Chalupnik; E. Kocsis; E. Toth-Bodrogi; T. Kovács

doi:10.3989/mc.2020.03820

Autores/as

A. Shahrokhi Institute of Radiochemistry and Radioecology, University of Pannonia https://orcid.org/0000-0003-1272-4869
M. Adelikhah Institute of Radiochemistry and Radioecology, University of Pannonia https://orcid.org/0000-0003-3339-9524
S. Chalupnik Silesian Centre for Environmental Radioactivity, Central Mining Institute https://orcid.org/0000-0002-2792-4954
E. Kocsis Institute of Radiochemistry and Radioecology, University of Pannonia https://orcid.org/0000-0002-8532-4009
E. Toth-Bodrogi Institute of Radiochemistry and Radioecology, University of Pannonia https://orcid.org/0000-0002-4135-7925
T. Kovács Institute of Radiochemistry and Radioecology, University of Pannonia https://orcid.org/0000-0003-2606-0397

DOI:

https://doi.org/10.3989/mc.2020.03820

Palabras clave:

Material de construcción, HNBRA, Evaluación de la radiación, Tasa de dosis, Efecto pantalla

Resumen

En este trabajo se ha medido la actividad de materiales NORM en veintitrés muestras de materiales de construcción que se emplean ampliamente en una zona expuesta a niveles elevados de radiación de fondo natural (Mahallat, Irán). El objetivo ha sido determinar el índice de radiactividad y cambios en el nivel de radiación gamma en el interior. Las concentraciones medidas de ²³²Th, ²²⁶Ra, ⁴⁰K fueron respectivamente (Bq/kg) de 18 ± 3–44 ± 10 (27 ± 6), 22 ± 5–53 ± 14 (34 ± 6), 82 ± 18–428 ± 79 (276 ± 58). Se han estimado unas dosis gamma a la población entre 48 ± 9–111 ± 26 nGy/h a excepción de la exhalación de radón de los materiales de construcción. Dado que la tasa kerma en aire en la ciudad varía entre 0.8–4 μGy/h, se calculó el coeficiente de atenuación para los edificios en los materiales mencionados. Además, las dosis de radiación gamma anual para los habitantes se calcularon teniendo en cuenta el tiempo en interiores y exteriores.

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