Measurement of natural radioactivity and radon exhalation rate in fly ash samples from a thermal power plant and estimation of radiation doses

Gupta, Mamta; Mahur, Ajay Kumar; Varshney, Rati; Sonkawade, R. G.; Verma, K.D.; Prasad, R.

doi:10.1016/j.radmeas.2012.03.015

Cited by 51 publications

(37 citation statements)

References 6 publications

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“…Additionally, many studies have analyzed the radiation hazards of industrial solid wastes. Mamta Gupta et al [10] reported that the radium equivalent activity of the FA from a thermal power plant in India was 353.9 Bq/kg, which is close to the maximum upper limit of 370 Bq/kg. L. Taoufiq et al [28] characterized the radioactivity of FA from a thermal power plant in Morocco, and found that the radium equivalent activity was 241-298 Bq/kg, which is lower than 370 Bq/kg.…”

Section: Introductionmentioning

confidence: 63%

Radioactivity of Five Typical General Industrial Solid Wastes and its Influence in Solid Waste Recycling

Zhang

Cheng

et al. 2019

Minerals

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The level of radionuclides is an important index for the preparation of building materials from industrial solid waste. In order to investigate the radiological hazard of five kinds of typical general industrial solid wastes in Guizhou, China, including fly ash (FA), red mud (RM), phosphorus slag (PS), phosphogypsum (PG), and electrolytic manganese residue (EMR), the radiation intensity and associated radiological impact were studied. The results show that concentrations of 238U, 235U, 232Th, 226Ra, 210Pb, and 40K for different samples vary widely. The concentration of 238U was both positively correlated with 235U and 226Ra, and the uranium contents in the measured samples were all of natural origin. The radiation levels of PG, EMR, EMR-Na (EMR activated by NaOH), and EMR-Ca (EMR activated by Ca(OH)2) were all lower than the Chinese and the world’s recommended highest levels for materials allowed to be directly used as building materials. The values of the internal and external illumination index (IRa and Iγ, respectively) for FA and RM were higher (IRa > 1.0 and Iγ > 1.3 for FA, IRa > 2.0 and Iγ > 2.0 for RM). The radium equivalent activity (Raeq), indoor and outdoor absorbed dose (Din and Dout, respectively), and corresponding annual effective dose rate (Ein and Eout) of RM, PS, and FA were higher than the recommended limit values (i.e., 370 Bq/kg, 84 nGy/h, 59 nGy/h, 0.4 mSv/y, and 0.07 mSv/y, respectively), resulting from the higher relative contribution of 226Ra and 232Th. The portion of RM, FA, and PS in building materials should be less than 75.44%, 29.72%, and 66.01%, respectively. This study provides quantitative analysis for the safe utilization of FA, RM, PS, PG, and EMR in Guizhou building materials.

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Section: Introductionmentioning

confidence: 63%

Radioactivity of Five Typical General Industrial Solid Wastes and its Influence in Solid Waste Recycling

Zhang

Cheng

et al. 2019

Minerals

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“…Such approach was proposed in accordance with Requirements for natural radioactivity in mineral resources during Geological Prospecting and Exploration [9][10][11][12]. Overall profile lines length was about 8000 m. Consequently, for four selected research sites 31 separated profile lines were set and drawn out, specifically, there were 7 profile lines in Beregovo, 7 profile lines in Sliač, 9 profile lines in Turčianske Teplice, and 8 profile lines in Rajecke Teplice.…”

Section: Determination Of the Exposure Rate Of Gamma Radiationmentioning

confidence: 99%

Research of the Radioactive and Physico-Chemical Characterisitcs of Thermal Ground Waters in the Slovak Republic and Transcarpathian Region, Ukraine

Bystrevska¹,

Pidlisnyuk²,

Aschenbrenner³

2015

ChChT

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Abstract. The thermal ground waters used for spa complexes in Zilinsky and Banskobystricky regions in the Slovak Republic and in Beregovo, Transcarpathian region, Western Ukraine, were analyzed for gammaradiation level, content of selected radioactive elements and physico-chemical characteristics. Comparative analysis of the thermal ground waters showed that waters in Beregovo had the highest radiation level in terms of gamma spectrum, which was about two times higher than the limit; in contrast, radiation levels of research sites in the Slovak Republic were within Slovakian standard limits. The concentrations of radioactive elements Ra 226 and U in the thermal ground waters in Beregovo, Ukraine and in Turčianske Teplice, the Slovak Republic were within the limit.Researched thermal ground waters in the Slovak Republic and Ukraine had similarities in geomorphological characteristics and tectonic background. However, physico-chemical characteristics of waters were diverse: while SO 4 2-and HPO 4 2-concentrations were close for all research tests, waters in Beregovo showed highest levels of concentrations of Ca 2+ , Na + , Fe 2+ , NH 4 + , and Cl -ions concentrations. Recommendations on improvement of the environmental situation at the research sites and further use with respect to sustainability were developed.

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“…Besides high content of main components (carbon, hydrogen, oxygen, nitrogen), coal also contains trace elements, including the naturally occurring radionuclides such as 238 U, 226 Ra, 210 Pb, 232 Th, and 40 K [18]. In addition, for the high compositions of clay minerals and excellent physicochemical properties, the bottom ash and fly ash are used as construction materials (cement, concrete, brick, and lightweight aggregate) [19,20]; thus the concentration characterization of natural radionuclides and their potential radiological hazards in fly (bottom) ash should be taken into careful consideration. In addition, for the high compositions of clay minerals and excellent physicochemical properties, the bottom ash and fly ash are used as construction materials (cement, concrete, brick, and lightweight aggregate) [19,20]; thus the concentration characterization of natural radionuclides and their potential radiological hazards in fly (bottom) ash should be taken into careful consideration.…”

Section: Introductionmentioning

confidence: 99%

“…During combustion, these natural radionuclides are enriched in fly ash and bottom ash, with the enrichment factors (EFs) up to more than one order of magnitude [14]. In addition, for the high compositions of clay minerals and excellent physicochemical properties, the bottom ash and fly ash are used as construction materials (cement, concrete, brick, and lightweight aggregate) [19,20]; thus the concentration characterization of natural radionuclides and their potential radiological hazards in fly (bottom) ash should be taken into careful consideration.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the radiological characterization in a coal‐fired power plant, China

You

et al. 2015

Env Prog and Sustain Energy

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The transformation and environmental characteristics of natural radionuclides in a coal‐fired power plant were investigated. The coal, bottom ash, fly ash, and soil samples were collected. The activity concentrations of natural radionuclides (226Ra, 232Th, and 40K) were determined by a high‐purity germanium gamma ray spectrometer. The radiological hazard factors include radium equivalent activity, external hazard index, air absorbed dose rates, and annual effective dose that were used to evaluate the potential environmental and health risk. The results show that these natural radionuclides are enriched in bottom ash and fly ash during coal combustion. The activity concentrations of these radionuclides at the southeast and northwest soil samples are generally higher than those of the southwest and northeast. 226Ra is mainly enriched at the distance of 200 m, while 232Th is primarily higher in the power plant. Based on the radiological risk assessment, the environmental effect of natural radionuclides caused by coal‐fired power plant is considered to be negligible because the radium equivalent activity and external hazard index values of the measured samples are below the acceptance limitations of 370 Bq kg−1 and 1. The bottom ash and fly ash could be used as construction materials under high management and regularization. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1080–1084, 2015

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Measurement of natural radioactivity and radon exhalation rate in fly ash samples from a thermal power plant and estimation of radiation doses

Cited by 51 publications

References 6 publications

Radioactivity of Five Typical General Industrial Solid Wastes and its Influence in Solid Waste Recycling

Radioactivity of Five Typical General Industrial Solid Wastes and its Influence in Solid Waste Recycling

Research of the Radioactive and Physico-Chemical Characterisitcs of Thermal Ground Waters in the Slovak Republic and Transcarpathian Region, Ukraine

Evaluation of the radiological characterization in a coal‐fired power plant, China

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