Recent Software Updates
Version:5.1.0
Last Release:Dec 19, 2025
The MACCS consequence analysis code simulates the release of radioactive material from a severe accident at nuclear power plant or other nuclear facility to the surrounding environment.
Version:4.4.1
Last Release:May 19, 2025
SecPop is an optional utility code that uses U.S. Census data to generate a MACCS site file that contains spatially varying regional data of a U.S. location.
Version:4.0.0
Last Release:Sep 28, 2022
MelMACCS is an optional utility code that provides an interface between MELCOR and MACCS.





