Core neutronics code development and application

The authors have completed a coupled Nuclear Data, Neutronics/Depletion Code System (DANDE) for neutronics calculations, and this system is now being used by the Los Alamos National Laboratory reactor design group in their reactor design calculations. A general layout of the code system is shown. The authors approach has been to link existing, proven codes through the use of a local controller (CTL) and to transfer files via a standard interface system