Browsing by Author "Varinlioğlu, A."

Now showing 1 - 3 of 3

Evaluation of the radiological safety aspects of utilization of Turkish coal combustion fly ash in concrete production
(Fuel 89 (2010) 2528–2535, 2010-01-16) Turhan, Şeref; Arıkan, İ.H.; Yücel, B.; Varinlioğlu, A.; Köse, A.
The aim of this study is to evaluate radiological safety aspects of the utilization of fly ash in concrete manufacturing in the construction industry. The specific activities of 226Ra, 232Th and 40K in one hundred 55 concrete mixture samples incorporating 10, 20 and 30 wt.% of fly ash collected from the 11 coal-fired thermal power plants were measured by means of gamma-ray spectrometry with HPGe detector. The results of the measurement were used to evaluate the radiological safety aspects of utilization of the fly ash as cement replacement in concrete by assessing the radium equivalent activity, the gamma index, the absorbed gamma dose rate and the corresponding annual effective dose due to the external exposure in indoor. The results of evaluation show that all concrete mixture samples are within the recommended safety limits except for concrete mixture samples incorporating 30 wt.% fly ash of Kangal coal-fired thermal power plant.
RADIOACTIVITY MEASUREMENT OF PRIMORDIAL RADIONUCLIDES IN AND DOSE EVALUATION FROM MARBLE AND GLAZED TILES USED AS COVERING BUILDING MATERIALS IN TURKEY
(Radiation Protection Dosimetry (2012), Vol. 151, No. 3, pp. 546–555, 2012) Turhan, Şeref; Varinlioğlu, A.
Measurements of the natural radioactivity arising from primordial radionuclides (226Ra, 232Th and 40K) in marble and glazed tile samples used covering building materials in Turkey were carried out by gamma-ray spectrometer with a high purity germanium detector. The mean activity concentrations of the 226Ra, 232Th and 40K in marble and glazed tile samples were found as 8.2, 5.5 and 58.1 Bq kg21 and 81.2, 65.4 and 450.1 Bq kg21, respectively. The radiation doses received by occupants of buildings in which the sample marble and glazed tiles might be used are estimated using measured activity concentrations of constituent primordial radionuclides and dose conversion factors evaluated by the European Commission from models of tile use. Results obtained are presented for each radionuclide, analysed and compared with relevant national and international legislation, guidance and report, and with the results obtained from other studies. Results show that the use of such decorative building materials in the construction of domestic homes or workplaces in Turkey is unlikely to lead to any significant radiation exposure to the occupants
RADIOACTIVITY MEASUREMENT OF PRIMORDIAL RADIONUCLIDES IN AND DOSE EVALUATION FROM MARBLE AND GLAZED TILES USED AS COVERING BUILDING MATERIALS IN TURKEY
(Radiation Protection Dosimetry (2012), Vol. 151, No. 3, pp. 546–555, 2012-03-05) Turhan, Şeref; Varinlioğlu, A.
Measurements of the natural radioactivity arising from primordial radionuclides (226Ra, 232Th and 40K) in marble and glazed tile samples used covering building materials in Turkey were carried out by gamma-ray spectrometer with a high purity germanium detector. The mean activity concentrations of the 226Ra, 232Th and 40K in marble and glazed tile samples were found as 8.2, 5.5 and 58.1 Bq kg21 and 81.2, 65.4 and 450.1 Bq kg21, respectively. The radiation doses received by occupants of buildings in which the sample marble and glazed tiles might be used are estimated using measured activity concentrations of constituent primordial radionuclides and dose conversion factors evaluated by the European Commission from models of tile use. Results obtained are presented for each radionuclide, analysed and compared with relevant national and international legislation, guidance and report, and with the results obtained from other studies. Results show that the use of such decorative building materials in the construction of domestic homes or workplaces in Turkey is unlikely to lead to any significant radiation exposure to the occupants.