A benchmark of some codes developed for the neutronic analysis of molten-salt reactors is presented. The results of the calculations are compared to the experimental data reported for the Molten Salt Reactor Experiment performed at Oak Ridge National Laboratory in the 60's. Both static and time-dependent situations are considered. The phenomena connected to the motion of the multiplying material are investigated. The results presented show a good agreement among the codes and with the available experimental data, thus proving the adequateness of the computational tools for the simulation of molten-salt systems.