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Radiometric measurement of lignite coal and its by-products and assessment of the usability of fly ash as raw materials in Turkey   
Yazarlar
Prof. Dr. Şeref TURHAN
Kastamonu Üniversitesi, Türkiye
Elif Gören
Ahmed M Khalifa Garad
Aydan Altıkulaç
Muğla Sıtkı Koçman Üniversitesi, Türkiye
Prof. Dr. Aslı KURNAZ
Kastamonu Üniversitesi, Türkiye
Doç. Dr. Celalettin DURAN
Kastamonu Üniversitesi, Türkiye
Prof. Dr. Aybaba HANÇERLİOĞULLARI
Kastamonu Üniversitesi, Türkiye
Volkan Altunal
Çukurova Üniversitesi, Türkiye
Veysi Güçkan
Adnan Özdemir
Özet
Lignite coal (LC) is a key energy source for electricity generation in Turkey. During lignite burning, huge amounts of fly ash (FA), bottom ash and slag are produced as by-products which contain radionuclides in the natural radioactive series of uranium and thorium, and radioactive potassium. These radionuclides may lead to radiological exposure of workers and the public and cause environmental problems. Therefore, finding diverse uses for the by-products in the construction sector and earthwork applications has considerable economic and environmental importance. In this study, the activity concentrations of 226Ra, 232Th and 40K in and radon emanating power (EP) and radon mass exhalation rate (EXRM) from LC, slag and FA obtained from the Kangal lignite-burning power plant with a power of 457 MWe were measured using gamma-ray spectroscopy. The major chemical components (SiO2, Al2O3, Fe2O3, CaO and MgO) of fly ash samples were analysed using an energy dispersive X-ray fluorescence spectrometer. The annual effective doses received by workers and members of the public were estimated using different scenarios specified in Radiation protection 122. The average activity concentrations of 226Ra, 232Th and 40K in LC, slag and FA samples were 187±21, 16±1 and 99±9 Bq kg-1, 620±18, 41±2 and 330±13 Bq kg-1, and 937±30, 38±2 and 272±17 Bq kg-1, respectively. The average values of EP and EXRM of the lignite, slag and FA samples were 8 %, 7 % and 10 %, and 0.1, 0.3 and 0.7 Bq kg-1 h-1, respectively. The highest average of the total annual effective dose is estimated at 153 μSv for members of the public and 74 μSv for workers, lower than the recommended annual limit of 1000 μSv.
Anahtar Kelimeler
annual effective dose | Coal | fly ash | major oxides | radioactivity | radon emanating power | radon mass exhalation rate | slag
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı RADIOCHIMICA ACTA
Dergi ISSN 0033-8230
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 07-2018
Cilt No 106
Sayı 7
Sayfalar 611 / 621
Doi Numarası 10.1515/ract-2017-2863
Makale Linki http://www.degruyter.com/view/j/ract.2018.106.issue-7/ract-2017-2863/ract-2017-2863.xml