Mathematics and Computations, Supercomputing in Nuclear Applications and Monte Carlo International Conference, M and C+Sna+Mc 2015, Date: 19 April 2015 through 23 April 2015, Sponsors: Department of Energy (DOE) National Nuclear Security Administration (NNSA);et al.;Institute of Nuclear Energy Safety Technology, CAS-FDS Team;Oak Ridge National Laboratory (ORNL) Radiation Safety Information Computational Center (RSICC);Organization for Economic Cooperation and Development (OECD) Nuclear Energy Agency (NEA);Varian Medical Systems