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Science and Technology of Nuclear Installations
Volume 2009, Article ID 759878, 13 pages
Project Report

GASFLOW Validation with Panda Tests from the OECD SETH Benchmark Covering Steam/Air and Steam/Helium/Air Mixtures

1Forschungszentrum Karlsruhe, Institut für Kern- und Energietechnik, 76021 Karlsruhe, Germany
2Division of Thermal-Hydraulics and Safety Research, Korean Atomic Energy Research Institute, Yseong, Daejeon 305-353, South Korea

Received 19 November 2008; Revised 2 March 2009; Accepted 22 April 2009

Academic Editor: Walter Ambrosini

Copyright © 2009 Peter Royl et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The CFD code GASFLOW solves the time-dependent compressible Navier-Stokes Equations with multiple gas species. GASFLOW was developed for nonnuclear and nuclear applications. The major nuclear applications of GASFLOW are 3D analyses of steam/hydrogen distributions in complex PWR containment buildings to simulate scenarios of beyond design basis accidents. Validation of GASFLOW has been a continuously ongoing process together with the development of this code. This contribution reports the results from the open posttest GASFLOW calculations that have been performed for new experiments from the OECD SETH Benchmark. Discussed are the steam distribution tests 9 and 9bis, 21 and 21bis involving comparable sequences with and without steam condensation and the last SETH test 25 with steam/helium release and condensation. The latter one involves lighter gas mixture sources like they can result in real accidents. The helium is taken as simulant for hydrogen.