Transient Three-Dimensional Stability Analysis of Supercritical Water Reactor Rod Bundle Subchannels by a Computatonal Fluid Dynamics Code

M. Sharabi, W. Ambrosini, Shuisheng He, Pei-Xue Jiang, Chen-Ru Zhao

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17 Citations (Scopus)


The paper describes the application of computational fluid dynamics (CFD) in simulating density wave oscillations in triangular and square pitch rod bundles. The FLUENT code is used for this purpose, addressing typical conditions proposed for supercritical water reactor (SCWR) conceptual design. ThRELAP5 code and an in-house 1D linear stability code are also adopted to compare the results for instability thresholds obtained by different techniques. Transient analyses are performed both by the CFD code and RELAP5, with increasing heating rates and constant pressure drop across the channel, up to the occurrence of unstable behavior. The obtained results confirm that the density wave mechanism is similar in rod bundle and in axisymmetric configurations.

Original languageEnglish
Article number022903
Number of pages6
JournalJournal of Engineering for Gas Turbines and Power
Issue number2
Publication statusPublished - Mar 2009


  • chemical reactors
  • computational fluid dynamics
  • power system transient stability
  • behavior
  • flow

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