MCNP, a well validated Monte Carlo code

The Monte Carlo code MCNP (general Monte Carlo N-particle transport code) is one of the best known and used Monte Carlo codes. It can be obtained from the NEA. This code can transport photons, electrons and neutrons. In the following, we will only consider neutron transport. The statistical sampling process is based on the selection of random numbers, analogous to throwing dice in the Monte Carlo gambling casino.