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Title: Naturally Occurring Radionuclides of Ash Produced by Coal Combustion. The Case of the Kardia Mine in Northern Greece

Abstract

West Macedonia Lignite Center (WMLC), located in Northwest Greece, releases into the atmosphere about 21,400 tons/year of fly ash through the stacks of four coal fired plants. The lignite ash contains naturally occurring radionuclides, which are deposited on the WMLC basin. This work investigates the natural radioactivity of twenty six ash samples, laboratory produced from combustion of lignite, which was sampled perpendicularly to the benches of the Kardia mine. The concentrations of radionuclides {sup 40}K, {sup 235}U, {sup 238}U, {sup 226}Ra, {sup 228}Ra and {sup 232}Th, were measured spectroscopically and found round one order of magnitude as high as those of lignite. Subsequently the Radionuclide Partitioning Coefficients of radionuclides were calculated and it was found that they are higher for {sup 232}Th, {sup 228}Ra and {sup 40}K, because the latter have closer affinity with the inorganic matrix of lignite. During combustion up to one third of the naturally occurring radioisotopes escape from the solid phase into the flue gases. With comparison to relative global data, the investigated ash has been found to have relatively high radioactivity, but the emissions of the WMLC radionuclides contribute only 0.03% to the mean annual absorbed dose.

Authors:
; ; ; ;  [1]
  1. Technological Educational Institute (TEI) of West Macedonia, Department of Pollution Control Technologies, Koila, Kozani, 50100 (Greece)
Publication Date:
OSTI Identifier:
21152469
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1034; Journal Issue: 1; Conference: NRE-VIII: 8. International symposium on the natural radiation environment, Buzios, RJ (Brazil), 7-12 Oct 2007; Other Information: DOI: 10.1063/1.2991239; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COMPARATIVE EVALUATIONS; FLY ASH; FOSSIL-FUEL POWER PLANTS; GAMMA SPECTROSCOPY; GREECE; LIGNITE; NATURAL RADIOACTIVITY; POTASSIUM 40; RADIATION DOSES; RADIUM 226; RADIUM 228; THORIUM 232; URANIUM 235; URANIUM 238

Citation Formats

Fotakis, M., Tsikritzis, L., Tzimkas, N., Kolovos, N., and Tsikritzi, R.. Naturally Occurring Radionuclides of Ash Produced by Coal Combustion. The Case of the Kardia Mine in Northern Greece. United States: N. p., 2008. Web. doi:10.1063/1.2991239.
Fotakis, M., Tsikritzis, L., Tzimkas, N., Kolovos, N., & Tsikritzi, R.. Naturally Occurring Radionuclides of Ash Produced by Coal Combustion. The Case of the Kardia Mine in Northern Greece. United States. doi:10.1063/1.2991239.
Fotakis, M., Tsikritzis, L., Tzimkas, N., Kolovos, N., and Tsikritzi, R.. Thu . "Naturally Occurring Radionuclides of Ash Produced by Coal Combustion. The Case of the Kardia Mine in Northern Greece". United States. doi:10.1063/1.2991239.
@article{osti_21152469,
title = {Naturally Occurring Radionuclides of Ash Produced by Coal Combustion. The Case of the Kardia Mine in Northern Greece},
author = {Fotakis, M. and Tsikritzis, L. and Tzimkas, N. and Kolovos, N. and Tsikritzi, R.},
abstractNote = {West Macedonia Lignite Center (WMLC), located in Northwest Greece, releases into the atmosphere about 21,400 tons/year of fly ash through the stacks of four coal fired plants. The lignite ash contains naturally occurring radionuclides, which are deposited on the WMLC basin. This work investigates the natural radioactivity of twenty six ash samples, laboratory produced from combustion of lignite, which was sampled perpendicularly to the benches of the Kardia mine. The concentrations of radionuclides {sup 40}K, {sup 235}U, {sup 238}U, {sup 226}Ra, {sup 228}Ra and {sup 232}Th, were measured spectroscopically and found round one order of magnitude as high as those of lignite. Subsequently the Radionuclide Partitioning Coefficients of radionuclides were calculated and it was found that they are higher for {sup 232}Th, {sup 228}Ra and {sup 40}K, because the latter have closer affinity with the inorganic matrix of lignite. During combustion up to one third of the naturally occurring radioisotopes escape from the solid phase into the flue gases. With comparison to relative global data, the investigated ash has been found to have relatively high radioactivity, but the emissions of the WMLC radionuclides contribute only 0.03% to the mean annual absorbed dose.},
doi = {10.1063/1.2991239},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1034,
place = {United States},
year = {Thu Aug 07 00:00:00 EDT 2008},
month = {Thu Aug 07 00:00:00 EDT 2008}
}