Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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COMBINED ANALYTICAL AND EXPERIMENTAL INVESTIGATIONS FOR LWR CONTAINMENT PHENOMENA

  • Allelein, Hans-Josef (Institute of Reactor Safety and Reactor Technology LRST, RWTH Aachen University) ;
  • Reinecke, Ernst-Arndt (Institute of Energy and Climate Research IEK-6 Forschungszentrum Julich GmbH) ;
  • Belt, Alexander (Institute of Reactor Safety and Reactor Technology LRST, RWTH Aachen University) ;
  • Broxtermann, Philipp (Institute of Reactor Safety and Reactor Technology LRST, RWTH Aachen University) ;
  • Kelm, Stephan (Institute of Energy and Climate Research IEK-6 Forschungszentrum Julich GmbH)
  • Received : 2012.03.21
  • Published : 2012.04.25
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Abstract

Main focus of the combined nuclear research activities at Aachen University (RWTH) and the Research Center J$\ddot{u}$lich (J$\ddot{U}$LICH) is the experimental and analytical investigation of containment phenomena and processes. We are deeply convinced that reliable simulations for operation, design basis and beyond-design basis accidents of nuclear power plants need the application of so-called lumped-parameter (LP) based codes as well as computational fluid dynamics (CFD) codes in an indispensable manner. The LP code being used at our institutions is the GRS code COCOSYS and the CFD tool is ANSYS CFX mostly used in German nuclear research. Both codes are applied for safety analyses especially of beyond design accidents. Focal point of the work is containment thermal-hydraulics, but source term relevant investigations for aerosol and iodine behavior are performed as well. To increase the capability of COCOSYS and CFX detailed models for specific features, e.g. recombiner behavior including chimney effect, building condenser, and wall condensation are developed and validated against facilities at different scales. The close connection between analytical and experimental activities is notable and identifying feature of the RWTH/J$\ddot{U}$LICH activities.

Keywords

References

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