Assessment of Computational Fluid Dynamics (CFD) Codes for Nuclear Reactor Safety Problems

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Following recommendations made at an “Exploratory Meeting of Experts to Define an Action Plan on the Application of Computational Fluid Dynamics (CFD) Codes to Nuclear Reactor Safety (NRS) Problems”, held in Aix-en-Provence, France on 15-16 May 2002, a Committee on the Safety of Nuclear Installations (CSNI) action plan was drawn up which resulted in the creation of three writing groups, with mandates to perform the following tasks:

  1. provide a set of guidelines for the application of CFD to NRS problems;
  2. evaluate the existing CFD assessment bases, and identify gaps that need to be filled in order to adequately validate CFD codes for application to NRS problems;
  3. summarise the extensions needed to CFD codes for application to two-phase NRS problems.

Work began in 2003. In the case of Writing Group 2 (WG2), a preliminary report was submitted to the Working Group on Accident Management and Analysis (WGAMA) in September 2004 which scoped the work needed to be carried out to fulfil the mandate, and made recommendations on how to achieve the objective. A similar procedure was followed by the other groups, and in January 2005 all three groups were reformed to carry out their respective tasks. The present document reports the work undertaken within WG2 as a result of this initiative.