I have a nuclear reactor design I would like to model. I would like to show the individual atoms and how they interact with each other in the reactor (specifically, I would like to model decay modes, interactions with photons). I was wondering if there was any software which would help me model this in 3D.
This reactor design is one of my own, so I know all about what happens inside of the reactor. I have used Geant4 and similar software before, but I would just like a simple graphical interface in which I could model nuclear systems.