Natural radioactivity releases from lignite power plants in Greece

Radiological characteristics and investigation of the radioactive equilibrium in the ashes produced in lignite-fired power plants

“…Among the samplings conducted and the analyses presented so far, are those of representative lignite, fly-ash and bottomash samples from Units I and III of the Megalopolis-A Power Plant (Simopoulos and Angelopoulos, 1987). In the present work two sampling schedules were organised in the Unit-IV of Megalopolis-B Power Plant, during the period from 13/01 to 23/02 1997.…”

“…Details about the techniques used may be found in Simopoulos and Angelopoulos (1987). The 226 Ra radioactivity was determined both indirectly from its decay products in equilibrium and directly from the 186.25 keV photons, in the cases where the analysis of the multiplet photopeak at~186 keV was applicable (Petropoulos et al, 2002).…”

“…Furthermore, in both deposits, and especially in that of Megalopolis, the natural radioactivity of lignite is much higher than that of the surrounding soil (Simopoulos and Angelopoulos, 1987), due, presumably, to the leaching of radionuclides from uraniferous rocks in the vicinity. From this point of view this lignite has to be considered of high radiological importance.…”

Palaeoenvironment of Seam I in the Marathousa Lignite Mine, Megalopolis Basin (Southern Greece)

“…Another distinct feature of the Megalopolis lignite is the release of radiochemical constituents, which are emitted to the atmosphere during combustion as part of the fine fly-ash particles, while an important amount of these constituents remains in the bottom ash (Coles et al, 1978;Roeck et al, 1987;Simopoulos and Angelopoulos, 1987;Manolopoulou and Papastefanou, 1992;Rouni et al, 2001;Papaefthymiou et al, 2005Papaefthymiou et al, , 2007. Emission of radiochemical constituents from coal-fired power plants constitutes a severe environmental concern (Smith et al, 1979;Clarke and Sloss, 1992;Harrison and Jones, 1995).…”

Μοντέλα Διακίνησης Και Εναπόθεσης Στερεών Σωματιδίων Ιπτάμενης Τέφρας Στο Περιβάλλον Και Συνακόλουθες Ραδιολογικές Επιπτώσεις Στην Λεκάνη Της Μεγαλόπολης

“…΄Ετσι στο παρελθόν έχουν διεξαχθεί έρευνες τόσο από το ΕΠΤ-ΕΜΠ, όσο και από άλλους ερευνητές, ώστε να προσδιοριστεί η επίδραση της λειτουργίας των ΑΗΣ Μεγαλόπολης στο περιβάλλον της περιοχής. Το ΕΠΤ-ΕΜΠ έχει επανειληµµένα ασχοληθεί µε τον προσδιορισµό των συγκεντρώσεων των ϕυσικών ϱαδιενεργών ισοτόπων των σειρών του 238 U και 232 Th στην ιπτάµενη τέφρα των ΑΗΣ της περιοχής [97], [173].…”