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2 Publications

Analysis of buoyancy driven coolant mixing by using the code TRIO_U

Höhne, T.; Bieder, U.

A generic investigation of the influence of density differences between the primary loop inventory and the ECC water on the mixing in the downcomer was made at the ROCOM Mixing Test Facility at Forschungszentrum Rossendorf (FZR). For the validation of the Trio_U code an experiment with 5% constant flow rate in one loop (magnitude of natural circulation) and 10% density difference between ECC and loop inventory was taken. Trio_U is a CFD code developed by the CEA France, aimed to supply an efficient computational tool to simulate transient thermal-hydraulic single -phase turbulent flows encountered in the nuclear systems as well as in the industrial processes. For this study, a LES approach was used for mesh sizes between 1–2 million control volumes. The study showed, that density effects play an important role during natural convection with ECC injection in pressurized water reactors. Further-more it was important to point out, that Trio_U is able to cope the main flow and mixing phenomena.

Keywords: Boron Dilution; COOLANT MIXING; ROCOM Test FACILITY; Computational Fluid Dynamics; LES; Trio_U

  • Lecture (Conference)
    Annual Meeting on Nuclear Technology 25.-27.05.2004, 2004, Düsseldorf, Germany
  • Contribution to proceedings
    Annual Meeting on Nuclear Technology 25.-27.05.2004, 2004, Düsseldorf, Germany, CD-ROM

Permalink: https://www.hzdr.de/publications/Publ-5952
Publ.-Id: 5952