Radioactivity of coal and ashes from Figueira coal power plant in Brazil

被引：0

作者：

M. Flues

I. M. C. Camargo

P. S. C. Silva

B. P. Mazzilli

机构：

[1] Centro de Química e Meio Ambiente,

[2] Instituto de Pesquisas Energéticas e Nucleares,undefined

[3] Centro de Química e Meio Ambiente,undefined

[4] Instituto de Pesquisas Energéticas e Nucleares,undefined

[5] Centro de Metrologia das Radiaç?es,undefined

[6] Instituto de Pesquisas Energéticas e Nucleares,undefined

[7] Centro de Metrologia das Radiaç?es,undefined

[8] Instituto de Pesquisas Energéticas e Nucleares,undefined

来源：

Journal of Radioanalytical and Nuclear Chemistry | 2006年 / 270卷

关键词：

Uranium; 210Pb; Enrichment Factor; Natural Radionuclide; Coal Power Plant;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Figueira coal-fired power plant (CFPP) is among the Brazilian CFPP which presents higher uranium concentration. Gamma-ray spectrometry was used to determine 238U, 226Ra, 210Pb, 232 Th and 40K contents in pulverized coal, furnace bottom ash and fly ash samples. The natural radionuclide concentrations in pulverized coal ranged from 813 to 2609 Bq . kg-1 for U series and from 22 to 40 Bq . kg-1 for 232 Th. The fly ash fraction gave concentrations ranging from 1442 to 14641 Bq . kg-1, for uranium series. The same enrichment factor was observed for 238U, 226Ra and 232 Th. Only 210Pb and stable Pb presented a high enrichment factor for the last stage filter fly ash. The concentration of the uranium series found in the ashes is close to the limit adopted by the Brazilian guideline (CNEN-NN-4.01).22 Therefore, it is advisable to evaluate the environmental impact of the installation.

引用

页码：597 / 602

页数：5

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