On the major DYN3D developments for fast reactor design and transient analysis

Due to the French project ASTRID [1], the European CP-ESFR [2] project, and the MYRRHA/FASTEF project [3], the research work on fast reactors has got a new push in Europe. Additionally to this European projects a strong project is growing in Russia based on the lead cooled fast reactor design BREST [4]. Following this trend, the Institute of Resource Ecology at the Helmholtz-Zentrum Dresden-Rossendorf has decided to start several projects dedicated to fast reactor technology [5], among them the extension of the well validated LWR core simulator DYN3D.
The new developments, first validation results, and the next strategic steps for the adaption of the code for the improved simulation of fast reactor cores are presented.