Browsing by Author "Kulahci, Fatih"

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Citation Count: 10
Monte Carlo simulations and forecasting of Radium-226, Thorium-232, and Potassium-40 radioactivity concentrations
(Springer, 2020) Kulahci, Fatih; Akozcan, Serpil; Gunay, Osman
This study depicts the radioactivity time series levels of Ra-226, Th-232, and K-40 prospectively by Monte Carlo simulations (MCSs). Three ARIMA stationary stochastic processes are used with measurement records statistical parameter conservation. The MCSs by means of the ARIMA stochastic processes, the statistical characteristics of the radionuclide data are determined and the future simulation forecasts are made for different periods (time between two measurements, i.e. 1 week). Future concentrations of radionuclides with MCS are estimated for the first time. The results obtained on the transport, control and management of radionuclides can also reach similar gains for other different materials.
Citation Count: 7
Radiological risk from activity concentrations of natural radionuclides: Cumulative Hazard Index
(Springer, 2021) Akozcan, Serpil; Kulahci, Fatih; Gunay, Osman; Ozden, Selin
The Cumulative Hazard Index method has been proposed for the first time to determine the low and high-risk levels of radionuclides. The significant radiological parameters and risk analyses for Ra-226, Th-232 and K-40 pollution levels control in the soil are determined through the probability distribution functions. The activity concentration of Ra-226, Th-232 and K-40 in samples were found to vary from of 16 +/- 0.6 to 62 +/- 3.2 Bq kg(-1) with an average 30 +/- 1.1 Bq kg(-1), 24 +/- 0.9 to 63 +/- 1.3 Bq kg(-1) with an average 37 +/- 1.0 Bq kg(-1) and 316 +/- 5.8 to 878 +/- 6.9 Bq kg(-1) with an average 525 +/- 6.2 Bq kg(-1), respectively.