Measurement of Natural Radioactivity and Radon Exhalation Rate in Coal Ash Samples from a Thermal Power Plant
Open Access
- 1 January 2016
- journal article
- research article
- Published by Scientific Research Publishing, Inc. in World Journal of Nuclear Science and Technology
- Vol. 06 (03), 153-160
- https://doi.org/10.4236/wjnst.2016.63017
Abstract
Coal is the main energy source for electricity generation in the world. In Morocco, 37% of electricity generation comes from combustion coal in thermal power plants. This combustion process generates large amounts of fly and bottom ashes. In recent years, these ashes became a great topic of interest because of their different uses and especially in construction materials. In this work, we assess radiation risks due to natural radioactivity in samples of fly and bottom ashes collected from JLEC (Jorf Lasfar Energy Company) thermal power plant, and different analyses are performed through two nuclear techniques such as gamma spectrometry and alpha dosimetry based on the use of LR115 films detectors. Our analysis shows that 226Ra activities and 232Th in both ash samples are well above the permissible activity. The values of the external risk index (Hex) and internal one (Hin) for these ashes are below unity, with the exception of 1.28 in fly ash for Hin. The obtained values for the equivalent radium Raeq and annual effective doses Ė in fly and bottom ashes are 324 Bq/kg and 210 Bq/kg, and 0.18 mSv/y and 0.11 mSv/y, respectively. The surface radon exhalation rates for the samples of fly and bottom ashes are 276 mBq⋅m-2⋅h-1 and 381 mBq⋅m-2⋅h-1, respectively. Based on these results, we have shown that fly ash and bottom one from thermal power plant JLEC didn’t have, in any case, a health risk to the public so it can be effectively used in various construction activities.Keywords
This publication has 14 references indexed in Scilit:
- Analysis of natural radionuclides in coal, slag and ash in coal-fired power plants in SerbiaJournal of Mining and Metallurgy, Section B: Metallurgy, 2011
- Escaping radioactivity from coal-fired power plants (CPPs) due to coal burning and the associated hazards: a reviewJournal of Environmental Radioactivity, 2010
- Behaviour of natural radionuclides in coal combustionRadioprotection, 2009
- Radiological Characterization around the Afsin-Elbistan Coal-Fired Power Plant in TurkeyEnergy & Fuels, 2007
- Radiological characteristics and investigation of the radioactive equilibrium in the ashes produced in lignite-fired power plantsJournal of Environmental Radioactivity, 2004
- Study of uranium, radium and radon exhalation rate in soil samples from some areas of Kangra district, Himachal Pradesh, India using solid-state nuclear track detectorsRadiation Measurements, 2003
- Application of a “closed-can” technique for measuring radon exhalation from mine samples of Punjab, PakistanJournal of Environmental Radioactivity, 2000
- Study of airborne radon levels inside buildingsInternational Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1989
- Natural Radioactivity of Australian Building Materials, Industrial Wastes and By-productsHealth Physics, 1985
- A study of radon emitted from building materials using plastic α-track detectorsPhysics in Medicine & Biology, 1980