Nuclear Technology & Radiation Protection Journal


NT & RP Journal	NATURAL RADIOACTIVITY LEVEL IN MATERIALS USED FOR MEDIEVAL VAULTING IN THE TERRITORY OF THE CENTRAL BALKAN REGION
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Vol. XXXI, No. 2, Pp. 111-195 June 2016 UDC 621.039+614.876:504.06 ISSN 1451-3994 Back to Contents	Pages: 184-189 Authors: Igor S. Bjelić, Dragana J. Todorović, Jelena D. Krneta-Nikolić, Djordje R. Lazarević, and Koviljka Dj. Stanković Abstract This work presents the results of an investigation undertaken to determine the level of natural radioactivity in the traditional building materials used for medieval indoor vaulted constructions in the territory of the central Balkan region. Indoor radiation exposure varies appreciably if it comes from the earth building materials, hence the presence of natural radioisotopes of ²²⁶Ra, ²³²Th, and ⁴⁰K in masonry vaulted constructions was analyzed using gamma ray spectrometry. In addition, the internal health hazard index, the absorbed dose rates and the effective annual doses were calculated. The results were then compared both with the reported data from the previous studies concerning the territory of the Balkan Peninsula, as well as with the worldwide values for the materials of historic buildings. The results obtained from the materials examined in this paper all showed the radioactivity levels below the maximum permitted values. Key words: natural radioactivity, building material, medieval vault, Balkan, gamma ray spectrometry FULL PAPER IN PDF FORMAT (855 KB)
Vinča Institute of Nuclear Sciences :: Designed by milas :: July 2007 Operated by acapanic :: Last updated on July, 2016

Pages: 184-189

Authors: Igor S. Bjelić, Dragana J. Todorović, Jelena D. Krneta-Nikolić, Djordje R. Lazarević, and Koviljka Dj. Stanković

Abstract
This work presents the results of an investigation undertaken to determine the level of natural radioactivity in the traditional building materials used for medieval indoor vaulted constructions in the territory of the central Balkan region. Indoor radiation exposure varies appreciably if it comes from the earth building materials, hence the presence of natural radioisotopes of ²²⁶Ra, ²³²Th, and ⁴⁰K in masonry vaulted constructions was analyzed using gamma ray spectrometry. In addition, the internal health hazard index, the absorbed dose rates and the effective annual doses were calculated. The results were then compared both with the reported data from the previous studies concerning the territory of the Balkan Peninsula, as well as with the worldwide values for the materials of historic buildings. The results obtained from the materials examined in this paper all showed the radioactivity levels below the maximum permitted values.

Key words: natural radioactivity, building material, medieval vault, Balkan, gamma ray spectrometry

FULL PAPER IN PDF FORMAT (855 KB)