This workshop was intended to provide a forum for numerical analysts and experimentalists to exchange information in the field of nuclear reactor safety (NRS) related activities relevant to computational fluid dynamics (CFD) validation:
The last decade has seen an increasing use of three-dimensional CFD codes to predict steady-state and transient flows in nuclear reactors. The reason for the increased use of multi-dimensional CFD methods is that a number of important phenomena such as pressurised thermal shocks, boron mixing, and thermal stratification cannot be predicted by traditional one-dimensional system codes with the required accuracy and spatial resolution.
CFD codes contain empirical models for simulating turbulence, heat transfer, multi-phase flows, and chemical reactions. Such models must be validated before they can be used with sufficient confidence in NRS applications. The necessary validation is performed by comparing model results against trustworthy data. However, in order to obtain a reliable model assessment, CFD simulations for validation purposes must satisfy strict quality criteria. For instance, numerical errors caused by too coarse numerical grids should be separated from shortcomings of the physical models to avoid wrong conclusions about model performance.
These requirements have prompted an NEA initiative to form a writing group of experts with the specific task of assessing the maturity of CFD codes for NRS applications, and to establish a data base and best practice guidelines for their validation. This workshop addressed these activities.
Brian L. Smith, Paul Scherrer Institute, Switzerland, General Chair
John H. Mahaffy, Pennsylvania State University, USA, Co-Chair (Single-Phase)
Dominique Bestion, Commissariat à l'Energie Atomique, France, Co-Chair (Multi-Phase)
Martina Scheuerer , Gesellschaft für Anlagen-und. Reaktorsicherheit, Germany, Local Organizer
Suk-Ho Lee, International Atomic Energy Agency, Austria, Secretariat
Han-Chul Kim, OECD Nuclear Energy Agency, France, Secretariat
Ulrich Bieder, Commissariat à l’Energie Atomique, France
Philippe Dietrich, Institut de Radioprotection et de Sûreté Nucléaire, France
Franck Dubois, Institut de Radioprotection et de Sûreté Nucléaire, France
Estelle Graffard, Institut de Radioprotection et de Sûreté Nucléaire, France
Mats Henriksson, Vattenfall Utveckling AB, Sweden
Thomas Höhne, Forschungszentrum Rossendorf, Germany
Moonkyu Hwang, Korea Atomic Energy Research Institute, Korea
Ed Komen, Nuclear Research and Consultancy Group, Netherlands
Fabio Moretti, University of Pisa, Italy
Tadashi Morii, Japan Nuclear Energy Safety Organization, Japan
Petr Mühlbauer, Nuclear Research Institute, Czech Republic
Tadashi Watanabe, Japan Atomic Energy Research Institute, Japan
Ghani Zigh, United States Nuclear Regulatory Commission, USA
Last updated: 18 September 2006