Applications of Code HELIOS at Research Center Rossendorf and some Remarks to Formal Innovations of the Code

This contribution shows some applications of code HELIOS at Research Center Rossendorf. These are: A cell assembly models of the European Pressurized Water Reactor (EPR), including burnup calculations, with HELIOS Version 1.6, and applications of a typical pressurized water reactors of the type KONVOI with HELIOS Version 1.6 & 1.7 and comparisons with the lattice transport and burnup code CASMO 4. The second part gives remarks what can be done better in future codes.