title: Radiological and instrumental neutron activation analysis determined characteristics of size-fractionated fly ash.
abstract: The concentration of trace elements and radionuclides in fly ash particles of different size can exhibit significant variation, due to the various processes taking place during combustion inside a coal-fired power plant. An investigation of this effect has been performed by analyzing samples of fly ash originating in two different coal-fired power plants, after separation into size fractions by sieving. The samples were analyzed by gamma-ray spectrometry, including low-energy techniques, radon exhalation measurement and instrumental neutron activation analysis for the determination of Al, As, Ga, K, La, Na, Mn, Mg, Sr, Sc, and V. Variations are observed in the results of various samples analyzed, while the activity balances calculated from the results of individual size fractions are consistent with those of the raw ash samples. Correlations among the radionuclides examined are also observed, while individual nuclide behavior varies between the two types of fly ash examined.
authors.affiliation: Nuclear Engineering Department, School of Mechanical Engineering, National Technical University of Athens, Athens, Greece.
authors.forename: T K
authors.initials: TK
authors.lastname: Peppas
authors.forename: K L
authors.initials: KL
authors.lastname: Karfopoulos
authors.forename: D J
authors.initials: DJ
authors.lastname: Karangelos
authors.forename: P K
authors.initials: PK
authors.lastname: Rouni
authors.forename: M J
authors.initials: MJ
authors.lastname: Anagnostakis
authors.forename: S E
authors.initials: SE
authors.lastname: Simopoulos
mesh_terms: D002244:Carbon / Q000032:analysis*; D003031:Coal; D060729:Coal Ash; D008670:Metals / Q000032:analysis*; D009501:Neutron Activation Analysis / Q000379:methods*; D052638:Particulate Matter / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis
chemical_list: D003031:Coal; D060729:Coal Ash; D008670:Metals; D052638:Particulate Matter; D011868:Radioisotopes; D002244:Carbon