Fisika SCWR thorium power density SRAC Thermal-hydraulics ethanolamine Aplikasi Fisika Core design reactor Fisika Material GCFR Gromacs HTGR LU Decomposition Lennard-Jones Matlab PWR Point reactor kinetics Runge Kutta Decomposition TiO2 anatase and MATLAB brookite core design ethanol hidrogen lysozyme molecular dynamics nanotitania neutron reaction rate nuclear accident photocatalyst reactor core design rutile sol gel