FLUKA

FLUKA (FLUktuierende KAskade) is a fully integrated Monte Carlo simulation package for the interaction and transport of particles and nuclei in matter. FLUKA has many applications in particle physics, high energy experimental physics and engineering, shielding, detector and telescope design, cosmic ray studies, dosimetry, medical physics, radiobiology. A recent line of development concerns hadron therapy.

It is the standard tool used in radiation protection studies in the CERN particle accelerator laboratory. FLUKA software code is used by Epcard, which is a software program for simulating radiation exposure on airline flights.

Comparison with other codes
MCNPX is slower than FLUKA.

Geant4 is slower than FLUKA.