title: ²²⁶Ra, ²³²Th and ⁴⁰K radionuclides enhancement rate and dose assessment for residues of lignite-fired thermal power plants in Turkey.
abstract: A total of 77 coal, slag and fly ash samples collected from six thermal power plants were measured by gamma-ray spectrometry. The average (226)Ra activity concentrations in coal, slag and fly ash were measured as 199.8±16.7, 380.3±21.8 and 431.5±29.0 Bq kg(-1), respectively. The average (232)Th activity concentrations in coal, slag and fly ash were measured as 32.0±2.4, 74.0±9.0 and 87.3±9.8 Bq kg(-1), respectively. The average (40)K activity concentrations in coal, slag and fly ash were found to be 152.8±12.1, 401.3±25.0 and 439.0±30.2 Bq kg(-1), respectively. The radium equivalent activities of samples varied from 147.6±8.5 to 1077.4±53.3 Bq kg(-1). The gamma and alpha index of one thermal power plant's fly ash were calculated to be 3.5 and 5 times higher than that of the reference values. The gamma absorbed dose rates were found to be higher than that of the average Earth's crust. The annual effective dose of residues measured in four thermal power plants were calculated higher than that of the permitted dose rate for public, i.e. 1 mSv y(-1).
authors.affiliation: Sarayköy Nuclear Research and Training Center, Istanbul Road 30 km, 06983 Saray, Ankara, Turkey. aydin.parmaksiz@taek.gov.tr
authors.forename: A
authors.initials: A
authors.lastname: Parmaksiz
authors.forename: P
authors.initials: P
authors.lastname: Arikan
authors.forename: M
authors.initials: M
authors.lastname: Vural
authors.forename: E
authors.initials: E
authors.lastname: Yeltepe
authors.forename: I
authors.initials: I
authors.lastname: Tükenmez
mesh_terms: D060729:Coal Ash / Q000737:chemistry*; D004781:Environmental Exposure / Q000032:analysis*; D005720:Gamma Rays; D006801:Humans; D052638:Particulate Matter / Q000737:chemistry*; D011197:Potassium Radioisotopes / Q000032:analysis; D011210:Power Plants; D011829:Radiation Dosage; D011834:Radiation Monitoring; D011883:Radium / Q000032:analysis; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013910:Thorium / Q000032:analysis; D014421:Turkey
chemical_list: D060729:Coal Ash; D052638:Particulate Matter; D011197:Potassium Radioisotopes; D012990:Soil Pollutants, Radioactive; D013910:Thorium; D011883:Radium