Integration of DYN3D inside the NURESIM Platform

The NURISP project (Nuclear Reactor Integrated Simulation Project) is focused on the further development of the European NUclear REactor SIMulation (NURESIM) platform for advanced numerical reactor design and safety analysis tools. NURESIM is based on an open source platform – called SALOME – that offers flexible and powerful capabilities for pre- and post processing as well as for coupling of multi-physics and multi-scale solutions. The developments within the NURISP project are concentrated in the areas of reactors physics, thermal hydraulics, multi-physics, and sensitivity and uncertainty methodologies. The aim is to develop experimentally validated advanced simulation tools including capabilities for uncertainty and sensitivity quantification. A unique feature of NURESIM is the flexibility in selecting the solvers for the area of interest and the interpolation and mapping schemes according to the problem under consideration. The Sub Project 3 (SP3) of NURISP is focused on the development of multi-physics methodologies at different scales and covering different physical fields (neutronics, thermal hydraulics and pin mechanics). One of the objectives of SP3 is the development of multi-physics methodologies beyond the state-of-the-art for improved prediction of local safety margins and design at pin-by-pin scale. The Karlsruhe Institute of Technology (KIT) and the Research Center Dresden-Rossendorf (FZD) are involved in the integration of the reactor dynamics code DYN3D into the SALOME platform for coupling with a thermal hydraulic sub-channel code (FLICA4) at fuel assembly and pin level. In this paper, the main capabilities of the SALOME platform, the steps for the integration process of DYN3D as well as selected preliminary results obtained for the DYN3D/FLICA4 coupling are presented and discussed. Finally the next steps for the validation of the coupling scheme at fuel assembly and pin basis are given.