Evaluation of radionuclide contamination of soil, coal ash and zeolitic materials from figueira thermoelectric power plant
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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Neutron activation analysis and gamma-ray spectrometry were used to determine
238U, 226Ra, 228Ra, 210Pb, 232Th and 40K contents in feed pulverized coal, bottom
ash, fly ash from cyclone and baghouse filters, zeolites synthesized from the ashes and
two different soil samples. All the samples used in the study were collected at Figueira
thermoelectric power plant, located in the city of Figueira, Parana State, where coal
presents a significant amount of uranium concentration. The natural radionuclide
concentrations in pulverized coal were 4216 Bq kg1 for 238U, 180 Bq kg1 for 226Ra,
27 Bq kg1 for 228Ra, 28 Bq kg1 for 232Th and 192 Bq kg1 for 40K. The ashes
fraction presented concentrations ranging from 683.5 to 1479 Bq kg1 for 238U, from
484 to 1086 Bq kg1 for 226Ra, from 291 to 1891 Bq kg1 for 210Pb, from 67 to 111
Bq kg1 for 228Ra, from 80 to 87 Bq kg1 for 232Th and from 489 to 718 Bq kg1
for 40K. Similar ranges were observed for zeolites. The activity concentration of 238U
was higher than worldwide average concentration for all samples. The concentration
of the uranium series found in the ashes were lower than the values observed in
similar studies carried out 10 years ago and under the limit adopted by the Brazilian
guideline (CNEN-NN-4.01). Nevertheless, the concentrations in this specific area are
higher than in other coal mine and thermoelectric power plants in and out of Brazil,
so it is advisable to evaluate the environmental impact of the installation.
Como referenciar
MIRANDA, C.S.; FUNGARO, D.A.; SILVA, P.S.C.; CAMPELLO, F.A.; IZIDORO, J.C. Evaluation of radionuclide contamination of soil, coal ash and zeolitic materials from figueira thermoelectric power plant. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 20-20. Disponível em: http://repositorio.ipen.br/handle/123456789/28713. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.