Radionuclide content of NORM by-products originating from the coal-fired power plant in Oroszlány (Hungary).

At the Thermal Power Plant in Oroszlány (Hungary), a huge amount of by-products have been produced since 1961. In this survey, coal and other by-products were examined (fly ash, bottom ash, fluidised bed bottom ash, gypsum and slurry-type ash). The natural isotopes were determined using an HPGe detector. It was found that the radionuclide content of coal was significantly lower ((226)Ra = 45.3±6.3, (232)Th = 26.3±5.7 and (40)K = 210±21 Bq kg(-1)) than that in the case of ashes other than the fluidised type. The average values of the bottom ash-deposited in the largest quantities-were three times higher than those for coal ((226)Ra = 144±18, (232)Th = 84.3±14 and (40)K = 260±25 Bq kg(-1)). In the case of fractionised bottom ash, the radionuclide content of <0.1 mm was 45 % higher than that of >1.6 mm and the massic radon exhalation of <0.1 mm was approximately four times higher than that above this range.

[1]  T. Kovács,et al.  Preliminary results of indoor radon survey in V4 countries. , 2014, Radiation protection dosimetry.

[2]  S. Uchida,et al.  Measurement of radon/thoron exhalation rates and gamma-ray dose rate in granite areas in Japan. , 2012, Radiation protection dosimetry.

[3]  S. Verhoeven,et al.  The use of portable equipment for the activity concentration index determination of building materials: method validation and survey of building materials on the Belgian market. , 2014, Journal of environmental radioactivity.

[4]  J. Kovács,et al.  Connection between radon emanation and some structural properties of coal-slag as building material , 2008 .

[5]  K. Kovler,et al.  Radon exhalation of cementitious materials made with coal fly ash: Part 1--scientific background and testing of the cement and fly ash emanation. , 2005, Journal of environmental radioactivity.

[6]  S. Mujahid,et al.  Determination of porosity of different materials by radon diffusion , 2005 .

[7]  Y. S. Mayya,et al.  Preliminary results from an indoor radon thoron survey in Hungary. , 2012, Radiation protection dosimetry.

[8]  C. Cosma,et al.  Soil and building material as main sources of indoor radon in Băiţa-Ştei radon prone area (Romania). , 2013, Journal of environmental radioactivity.

[9]  Z Kis,et al.  Radioactivity of natural and artificial building materials - a comparative study. , 2013, Journal of environmental radioactivity.

[10]  C. Nuccetelli.  In situ gamma spectroscopy in environmental research and monitoring. , 2008, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[11]  J. Bolívar,et al.  A short-time method to measure the radon potential of porous materials. , 2009, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[12]  T. Feigenspan,et al.  Radon permeability and radon exhalation of building materials. , 2001, The Science of the total environment.

[13]  R Doll,et al.  Radon in homes and risk of lung cancer: collaborative analysis of individual data from 13 European case-control studies , 2004, BMJ : British Medical Journal.