Dec 27, 2018· The results reveal that the mean radioactivity (Bq kg-1) concentrations in feed coal samples are 66.5 ± 24.2, 41.7 ± 18.2, 62.5 ± 26.3, and 232.4 ± 227.2 for U-238, Ra-226, Th-232, and K-40, respectively, while in coal combustion residuals (CCRs), they are 206.3 ± 72.4, 140.5 ± 28.4, 201.7 ± 44.7, and 232.5 ± 43.8, respectively.
ABSTRACT This study aimed to assess the radioactivity levels and associated dose rates from the naturally occurring radionuclides 226Ra, 232Th and 40K in coal and coal ashes at Kiwira coal mine.
Jun 23, 2020· Activity conce. The natural radioactivity in coal fly ash and natural pozzolan Portland cement samples produced in Spain was measured by gamma spectrometry. Activity concentrations of 226Ra, 232Th and 40K ranged from 15.7 to 88.3 Bq kg−1, from 12.8 to 81.0 Bq kg−1 and from 37.0 to 678.0 Bq kg−1, respectively.
Aug 13, 2020· Habib MA, Basuki T, Miyashita S, Bekelesi W, Nakashima S, Techato K, Khan R, Majlis ABK, Phoungthong K (2019) Assessment of natural radioactivity in coals and coal combustion residues from a coal-based thermoelectric plant in Bangladesh: implications for radiological health hazards. Environ Monit Assess 191:27.
ASSESSMENT OF RADIOACTIVITY LEVELS IN COAL AND COAL ASH IN KIWIRA COAL MINE USING GAMMA-RAY SPECTROMETRY Ismael N Makundi1, Mungubariki M Nyaki1,2 and Najat K Mohammed1 1Department of Physics, University of Dar es Salaam, P.O. Box 35063, Dar es Salaam, Tanzania. 2Tanzania Atomic Energy Commision, P. O. Box 743, Arusha.
The natural radioactivity in coal fly ash and natural pozzolan Portland cement samples produced in Spain was measured by gamma spectrometry. Activity concentrations of
This study aimed to assess the radioactivity levels and associated dose rates from the naturally occurring radionuclides 226Ra, 232Th and 40K in coal and coal ashes at Kiwira coal mine. The radioactivity of 40 representative coal, fly ash samples were measured using gamma spectroscopy of the Tanzania Atomic Energy Commission (TAEC) in Arusha, Tanzania.
Nov 29, 2016· Assessment of the radiation exposure from coal burning is critically dependent on the concentration of radioactive elements in coal and in the fly ash that remains after combustion. Data for uranium and thorium content in coal is available from the U.S. Geological Survey (USGS), which maintains the largest database of infor-mation on the chemical composition of U.S. coal.
Apr 01, 2014· : Natural Radioactivity and Assessment of Associated Radiation Hazards in Soil and Water Samples Collected from in and around of the Barapukuria 2×125 MW Coal Fired Thermal Power Plant, Dinajpur, Bangladesh . radiation exposure of the world’s population[6]. Therefore, great interest has been expressed worldwide for the study of
RADIATION, RADIOACTIVITY ANDRISK ASSESSMENT What is Radiation? Radiation Radiation Doses in Millirem from Various Exposures (annual dose unless otherwise stated) 450,000. Acute dose, LD 50/60 (a lethal dose to 50% of a population Coal Ash 1 ton 2 million d/s ACME Fe rtilizer Super Phosphate 500. NY. Grand Central Station 480. Denver
Dec 27, 2018· To study the level of radioactivity concentrations from a coal-based power plant (Barapukuria, Bangladesh) and to estimate the associated radiological hazards, coal and associated combustion residuals from the power plant were analyzed by gamma-ray spectrometry with high-purity germanium (HPGe) detector. The results reveal that the mean radioactivity (Bq kg−1) concentrations in feed coal
Burning of the coal that occur around coal-fired power plants and also in many of the habitance during the winter season may affect human health as it contains natural radionuclides. In this study, the radioactivity of the different types of coal samples used in Turkey has been determined using a -ray spectrometer which consists of a NaI (Tl) detector connected MCA, and possible health effect
ASSESSMENT OF RADIOACTIVITY LEVELS IN COAL AND COAL ASH IN KIWIRA COAL MINE USING GAMMA-RAY SPECTROMETRY Ismael N Makundi1, Mungubariki M Nyaki1,2 and Najat K Mohammed1 1Department of Physics, University of Dar es Salaam, P.O. Box 35063, Dar es Salaam, Tanzania. 2Tanzania Atomic Energy Commision, P. O. Box 743, Arusha.
Abstract. Radioactivity of 226 Ra, 232 Th, and 40 K were measured in a total of 92 samples, including eight commonly used types of building materials that were obtained from local manufacturers and suppliers in Beijing. Concentrations were determined using high-purity germanium gamma-ray spectrometry. The 226 Ra, 232 Th, and 40 K activity concentrations in all samples varied from 10.1 to
This study aimed to assess the radioactivity levels and associated dose rates from the naturally occurring radionuclides 226Ra, 232Th and 40K in coal and coal ashes at Kiwira coal mine. The radioactivity of 40 representative coal, fly ash samples were measured using gamma spectroscopy of the Tanzania Atomic Energy Commission (TAEC) in Arusha, Tanzania.
Assessment of natural radioactivity in coals and coal combustion residues from a coal-based thermoelectric plant in Bangladesh: implications for radiological health hazards. Environmental Monitoring and Assessment 2019, 191 (1) DOI: 10.1007/s10661-018-7160-y.
Assessment of natural radioactivity in the marine environment in Croatia G. Marovic, Z. Frame and J. Sencar location exposed to any kind of pollution including the radioactivity emitted from the coal fired power plant situated about 5 km from the seaside. The coal used for the regular plant operation originates from a
Coal and Fly Ash Assessment of the radiation exposure from coal burn-ing is critically dependent on the concentration of radio-active elements in coal and in the fly ash that remains after combustion. Data for uranium and thorium content in coal is available from the U.S. Geological Survey
dose assessment of natural radioactivity in fly ash and environmental materials from morupule a coal-fired power station in botswana . by . john mudiwa, 10435641 . bsc biomedical engineering, 2003 . a thesis submitted to the department of medical physics, university of ghana, graduate school of nuclear and allied sciences
Coal can be mined in either open pits or underground mines, and produces a significant amount of waste rock, and drainage water that can present with elevated levels of radioactivity. Underground coal mines are subject to increased radon levels, while elevated levels of radium and K-40 can be found in mining waste rocks and soil.
The natural radioactivity due to (238)U and (232)Th was found to be negligible. While the activity concentrations of (226)Ra ranged from 3205 to 12,320 Bq kg(-1) with an average value of 9284 Bq kg(-1), (210)Pb ranged from 5960 to 13,930 Bq kg(-1) with an average value of 11,513 Bq kg(-1).
Apr 01, 2002· Read "Assessment of radioactive contaminants in by-products from Yatagan (Mugla, Turkey) coal-fired power plant, Environmental Geology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Environmental radioactivity assessment was carried out around coal mine at okaba. This was done using a digital radiation meter (INSPETOR 06250 MODEL) which is optimise to measure alpha, beta and gamma radiation. On the basis of measurement of environmental radioactivity around coalmine at okaba, result obtained in exposure rate (mR/hr) after
Mar 04, 2013· The activity concentrations of naturally occurring radionuclides Ra-226, Th-232 and K-40, were measured by using a gamma ray spectrometry for coal, soil and water samples collected from the Barapukuria coal mine in Dinajpur district of Bangladesh. The average activity concentrations of Ra-226, Th-232 and K-40 in coal samples were found to be 6.21±3.68, 10.69±7.5 and 185.76±138.86