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    Assessment of different hazard indices around coal-fired power plants in Turkey
    (Springer, 2021) Esen, Ayse Nur; Haciyakupoglu, Sevilay; Erenturk, Sema Akyil
    This paper presents the radiological and heavy metal risk assessment to evaluate the impact of coal-fired power plants on humans and the environment in Turkey. Radiological evaluation was performed in terrestrial and freshwater ecosystems. For the freshwater reference organisms, total dose rates for insect larvae, mollusc bivalve, and gastropod, and zooplankton show radiological risk. Non-carcinogenic and carcinogenic risks, contamination factor, ecological risk, and geoaccumulation index for heavy metal risk assessment are the aspects of interest. Long-term exposure of children to heavy metals in coal may cause non-carcinogenic harmful effects.
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    Comparison of relative INAA and k0-INAA using proficiency test materials at ITU TRIGA Mark II research reactor
    (Springer, 2018) Esen, Ayse Nur; Haciyakupoglu, Sevilay; Erenturk, Sema
    Proficiency testing is an important way of evaluating the analytical method used in the laboratory. In recent years, neutron activation analysis studies performed in ITU TRIGA Mark II reactor comprised five proficiency tests organized by Wageningen evaluating programs for analytical laboratories. In this study, the results obtained by relative INAA and k (0)-INAA method for 16 elements in soil and plant samples are presented. Since both methods have some advantages compared to each other, the possible approach for the laboratory should be to combine relative INAA and k (0)-INAA results.
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    Experimental parameters optimization of instrumental neutron activation analysis in order to determine selected elements in some industrial soils in Turkey
    (Pergamon-Elsevier Science Ltd, 2014) Haciyakupoglu, Sevilay; Esen, Ayse Nur; Erenturk, Sema
    The purpose of this study is optimization of the experimental parameters for analysis of soil matrix by instrumental neutron activation analysis and quantitative determination of barium, cerium, lanthanum, rubidium, scandium and thorium in soil samples collected from industrialized urban areas near Istanbul. Samples were irradiated in TRIGA MARK II Research Reactor of Istanbul Technical University. Two types of reference materials were used to check the accuracy of the applied method. The achieved results were found to be in compliance with certified values of the reference materials. The calculated En numbers for mentioned elements were found to be less than 1. The presented data of element concentrations in soil samples will help to trace the pollution as an impact of urbanization and industrialization, as well as providing database for future studies. (C) 2014 Elsevier Ltd. All rights reserved.
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    Feasibility study of k 0-INAA at the ITU TRIGA Mark II research reactor, Turkey
    (Springer, 2016) Esen, Ayse Nur; Haciyakupoglu, Sevilay; Erenturk, Sema; Kubesova, Marie; Kucera, Jan
    This work is focused on testing the implementation of k (0)-INAA using Kayzero for Windows and k0-IAEA software packages at the ITU TRIGA Mark II research reactor. The neutron spectrum parameters were determined using the bare triple-monitor method with Au and Zr monitors. The k (0)-INAA performance was tested by analysis of NIST SRMs 2711 Montana Soil and 1547 Peach Leaves. The performance assessment based on the E (n) criterion showed that the concentrations of a number of elements in both NIST SRMs determined by both software packages are in agreement with NIST values.
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    Implementation of k0-INAA standardisation at ITU TRIGA Mark II research reactor, Turkey based on k0-IAEA software
    (Pergamon-Elsevier Science Ltd, 2016) Esen, Ayse Nur; Haciyakupoglu, Sevilay
    The purpose of this study is to test the applicability of k(0)-INAA method at the Istanbul Technical University TRIGA Mark II research reactor. The neutron spectrum parameters such as epithermal neutron flux distribution parameter (a), thermal to epithermal neutron flux ratio (f) and thermal neutron flux (phi th) were determined at the central irradiation channel of the ITU TRIGA Mark II research reactor using bare triple-monitor method. HPGe detector calibrations and calculations were carried out by k(0)-IAEA software. The alpha, f and phi th values were calculated to be -0.009, 15.4 and 7.92.10(12) cm(-2) s(-1), respectively. NIST SRM 1633b coal fly ash and intercomparison samples consisting of clay and sandy soil samples were used to evaluate the validity of the method. For selected elements, the statistical evaluation of the analysis results was carried out by z-score test. A good agreement between certified/reported and experimental values was obtained. (C) 2015 Elsevier Ltd. All rights reserved.
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    Instrumental neutron activation analysis of plant tissues and soils for biomonitoring in urban areas in Istanbul
    (Springer, 2016) Esen, Ayse Nur; Kubesova, Marie; Haciyakupoglu, Sevilay; Kucera, Jan
    The aim of this study was to determine the elemental concentrations of plant tissues and soils collected in Istanbul to evaluate the possible use of selected tree species, Carpinus betulus L., Quercus petraea (Mattuschka) Liebl., Tilia argentea Desf. ex DC., as biomonitors. The concentrations of 26 elements were determined by k (0-)INAA using Kayzero for Windows software. Generally, the element concentrations in samples from urban areas were found to be higher than those of control area. Tilia argentea Desf. ex DC. may be an effective biomonitor for As, Br, Ca, Cl, Cr, Fe, Hf, K, Sb, Sc, Sr, and Th.
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    An Overview of Energy Technologies for a Sustainable Future
    (Springer Int Publishing Ag, 2015) Esen, Ayse Nur; Duzgit, Zehra; Toy, A. Ozgur; Gunay, M. Erdem
    Population and the economic growth are highly correlated with the energy demand. The world population was multiplied by a factor of 1.59 (reaching above 7 billion) from 1980 to 2013, while the total energy consumption of the world was multiplied by 1.84 (getting beyond 155,000 TWh) in the same time interval. Furthermore, the demand for energy is expected to increase even more with an average annual rate of 1.2 % in the near future. However, for the last 30 years, about 85-90 % of the energy demand is supplied by petroleum, natural gas, and coal, even though they are harmful for the environment and estimated to be depleted soon. Hence, building energy policies to satisfy the needs of increasing population and growing economy in a sustainable, reliable, and secure fashion has become quite important. This may involve optimizing the energy supplies, minimizing the environmental costs, promoting the utilization of clean and renewable energy resources and diversifying the type of energy sources. Thus, not only the conventional energy generation technologies must be developed more, but also environmentally friendly alternative energy sources (such as wind, solar, geothermal, hydro, and bio) must become more widespread to sustain the energy needs for the future. However, this requires a significant amount of research on energy technologies and an effective management of the energy sources.