Distribution of natural radioactivity and assessment of radioactive dose of Western Anatolian plutons, Turkey

Authors : Argyrios PAPADOPOULOS, Şafak ALTUNKAYNAK, Antonis KORONEOS, Alp ÜNAL, Ömer KAMACI

Pages : 434-455

View : 14 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The distribution of 226Ra, 232Th, and 40K in 70 granite samples obtained from 13 Western Anatolian plutons insert ignore into journalissuearticles values(Turkey); was measured by using γ-ray spectroscopy. The activities of the measured radionuclides varied up to 259 Bq kg-1 for 226Ra, up to 241 Bq kg?1 for 232Th, and up to 2518 Bq kg-1 for 40K, with mean values of 66 insert ignore into journalissuearticles values(±44);, 90 insert ignore into journalissuearticles values(±47);, and 1097 insert ignore into journalissuearticles values(±410); Bq kg-1, respectively, which are smaller than the mean values given for granites worldwide. The mean value of the increase on the external γ-radiation effective dose rate is 0.21 insert ignore into journalissuearticles values(±0.09); mSv year-1, varying by <1 mSv year-1. The mean value of the internal α-radiation was 0.15 insert ignore into journalissuearticles values(±0.10); mSv year-1, varying <0.5 mSv year-1. Most of the samples cause an increase to both the external and internal dose by <30%, which is smaller than the permitted limit. Therefore, there is no radiological risk from the usage of the samples studied as decorative and ornamental building materials.
Keywords : Building materials, Western Anatolia, granitic plutons, external internal exposure, uranium, thorium, radiation index