MCNP5 Element Library Least Squares Method for On-line Coal Analysis
One of the current methods for the on-line analysis of the coal is the neutron inelastic scattering and thermal-capture analysis (NITA) for non-destructive in situ measurements of the elemental concentration of a bulk sample. A prototype apparatus (including detector, fast neutron source, bulk sample and shielding materials) was simulated by using MCNP5 (Monte Carlo N-Particle) software package. In the material card of MCNP5, the concentration of these elements of the synthetic coal sample was used by taking into consideration of the rates of the lignite coal reserve in Aegean Region of Turkey. The histograms of the relation between number of particles and energy of the gamma were converted to Gaussian distribution by using response functions of the BGO detector. With the separate simulation of MgO, Fe2O3, CaO, Al2O3, SiO2, Sand C, the element library spectrum was obtained in order to fit the spectrum of synthetic coal sample by using MLR (Multiple Linear Regression) method. By using the relation between the coal sample spectrum and the fitted coal spectrum by MLR, the element library least squares (LLs) method was applied to calculate the elemental contents for the relative coal sample.
C. S. Lim “Recent development in neutron-induced gamma activation for on line multi-elemental analysis in industry”, J. Radioanal. Nucl. Chem. 262 (2) 525-532 (2004)
C. S. Lim, B. D. Sowerby “ On-line bulk elemental analysis in the resource industries using neutron-gamma techniques.”, J. Radioanal. Nucl. Chem. 264 (1) 15-19 (2005).
Agostinelli S. et al “Geant4 a simulation toolkit” Nucl. Instrum. Methods Phys. Res. A (506) 250-303 (2003).
Allison J. et al "Geant4 developments and applications", IEEE Trans. Nucl. Sci. 53 (1) 270-278 (2006).
Breismeister J.F. “MCNP: a General Monte Carlo N-Particle Transport Code, Version 4B”, LA-12625-M. Los Alamos National Lab., New Mexico (1997).
Fasso A., Ferrari A., Ranft J. and Sala P. R. FLUKA: a Multi-Particle Transport Code, CERN 2005-10, INFN/TC_05/11, SLAC-R-773 (2005).
Curtis A. Palmer, Ertem Tuncalı, Kristen O. Dennen,Timothy C. Coburn, Robert B. Finkelman, “Characterization of Turkish coals: a nationwide perspective”, Int. J. Coal Geol. 60 85–115 (2004).
H. Vincke, E. Gschwendtner, C.W. Fabjan, T. Otto, “Response of a BGO detector to photon and neutron sources: simulations and measurements”, Nucl. Instrum. Methods Phys. Res. Sect. A (484) 102–110 (2002).
J. K. Shultis, R. E. Faw “An MNCP Primer ” Dept. of Mechanical and Nuclear Engineering Kansas State University Manhattan, (2011).
W. HuiDong, L. JingBin, L. YuPing, Y. Dong, M. KeYan, Y. Kang, L. YuMin, C. DaoWen, “An experiment-library least-squares method on on-line coal element contents analysis”, Sci. China Inf. Sci, Vol.55 No.11: 2062–2069, (2012).