After logging into RSICC, search for . You will be required to:

| Component | Minimum Recommendation | |-----------|------------------------| | | Linux (RHEL 7+, Ubuntu 18.04+) – Windows via WSL or Virtual Machine | | CPU | x86_64, 4+ cores (more = better for parallel runs) | | RAM | 8 GB (16–64 GB recommended for large geometries) | | Storage | 10 GB (includes cross-section libraries) | | Compiler | GNU Fortran (gfortran) 9+ or Intel Fortran (ifati) | | MPI | OpenMPI or MPICH for parallel runs |

Once you have the official files, follow these steps (Linux example):

| Code | Language | Best For | Download | |------|----------|----------|----------| | | Python/C++ | Reactor physics, continuous-energy Monte Carlo | openmc.org | | Geant4 | C++ | High-energy physics, medical physics | geant4.cern.ch | | Serpent 2 | Fortran (free for research) | Burnup, V&V – requires academic registration | serpent.vtt.fi | | FLUKA | Fortran/CERN | Particle therapy, shielding | fluka.cern |

The Radiation Safety Information Computational Center (RSICC) at Oak Ridge National Laboratory is the primary distributor for all non-LANL employees.