Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

3 Publications

Counter-current flow limitation experiments in a model of the hot leg of a pressurised water reactor

Vallee, C.; Deendarlianto; Lucas, D.; Beyer, M.; Pietruske, H.; Carl, H.


The counter-current flow limitation was investigated experimentally in a flat model of the hot leg of a pressurised water reactor. Counter-current flow limitation, or the onset of flooding, was found by analysing the water levels measured in the separators. A confrontation with high-speed observation images indicates that the initiation of flooding coincides with the reversal of the flow in the horizontal part of the hot leg due to high air velocities.

Furthermore, the CCFL data was compared with empirical correlations for analogue geometries available in the literature. This comparison shows that the Wallis-parameter can be applied to rectangular cross-sections by using the channel height as length, instead of the diameter. The obtained flooding curve is similar to those reported by other investigators, but its slope and the gaseous Wallis parameter for zero penetration are lower. This is attributed to the geometry of the hot leg model.

Keywords: hot leg; pressurised water reactor; PWR; two-phase flow; counter-current flow; counter-current flow limitation; CCFL

  • Contribution to proceedings
    Jahrestagung Kerntechnik 2008, 27.-29.05.2008, Hamburg, Deutschland
    Jahrestagung Kerntechnik 2008 - Fachsitzungen / Topical Sessions, Berlin: INFORUM Verlags- und Verwaltungsgesellschaft
  • Lecture (Conference)
    Jahrestagung Kerntechnik 2008, 27.-29.05.2008, Hamburg, Deutschland
  • atw - International Journal for Nuclear Power 53(2008)8/9, 546-549