Karlsruher Institut für Technologie



Multi-physics Methodologies for Light Water Reactors within the NURESIM

Montag, 14. November 2011, 14:00-15:30
KIT Campus Nord, INR, Bau 521, 2. OG, Raum 302
Abstract High accuracy simulations for Nuclear Power Plants (NPP) has become more practical with rapid grow of computing systems and developed computational roots. The precise prediction of the power distribution, heat transport and flow behavior in the core of nuclear reactors is of great importance to improve the economics and assess the safety features of any reactor design. A thorough knowledge of basic issues, such as core thermal hydraulics, neutronics and its interactions are necessary to ensure safety at reasonable cost. To achieve these objectives, numerical simulation tools are being developed and continuously improved in the nuclear sector. In Europe, a NUclear REactor SIMulation Platform (NURESIM) is under development in the frame of collaborative projects like NURESIM and NURISP (a partnership between 14 European countries and 22 organizations). This platform facilitates a more accurate simulation of the physical phenomena by coupling the most advanced core physics, single and two phase flow thermal-hydraulics and fuel mechanics codes following a multi-scale and multi-physics approach. In the meantime, different reactor dynamic solvers (CRONOS2, DYN3D, COBAYA3D) are coupled with the sub-channel code FLICA4 at a nodal level. Since COBAY3D is the only code that can solve the improved neutron diffusion equation at nodal and cell level using the domain decomposition method for both square and hexagonal fuel assemblies, it was decided to coupled it with the in house KIT subchannel code SUBCHANFLOW within the SALOME platform. To do so, first of all, SUBCHANFLOW has to be fully integrated in SALOME. The integration of SUBCHANFLOW in the SALOME platform and its coupling with COBAYA3D for nodal steady state simulations are described. Moreover representative results demonstrating that SUBCHANFLOW can be run within SALOME coupled with COBAYA3D are given.
Manuel Calleja

Karlsruher Institut für Technologie, KIT
Institut für Neutronenphysik und Reaktortechnik, INR
Institut für Neutronenphysik und Reaktortechnik
Karlsruher Institut für Technologie (KIT) - Campus Nord
Hermann-von-Helmholtz-Platz 1
76344 Eggenstein-Leopoldshafen
E-Mail:ingeborg schwartzXld6∂kit edu