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NUMERICAL SIMULATION OF THERMAL FLUID DYNAMICS IN THE PBMR CORE

Volumen 7, Ausgabe 1, 2016, pp. 67-76
DOI: 10.1615/SpecialTopicsRevPorousMedia.v7.i1.60
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ABSTRAKT

The Pebble Bed Modular Reactor (PBMR) is a type of pebble bed reactor developed by the South African company PBMR (Pty) Ltd. The PBMR is a gas-cooled, graphite-moderated nuclear reactor. Thermal-fluid phenomena in the PBMR core at various porosities (0.35, 0.4, and 0.45) and inlet velocities (2.5, 3.5, and 4.5 m/s) are numerically investigated by developing a two-dimensional computational fluid dynamics model. The k−ε model was used to predict the turbulence and the semi-implicit method for pressure-linked equations algorithm was used to handle the velocity−pressure coupling. The results show that when the inlet velocity is increased from 2.5 to 4.5 m/s, the pressure drop and the heat transfer coefficient increase, but the coolant temperature decreases. Also, it was found that when the porosity is increased from 0.35 to 0.45, the pressure drop decreases but the heat transfer coefficient increases.

REFERENZIERT VON
  1. Latifi Masoumeh Sadat, du Toit C. G., A Numerical Study to Investigate the Effect of Inlet Reynolds Number on the Thermal–Fluid Phenomena in the Supercritical Carbon Dioxide-Cooled Pebble Bed Reactor, Arabian Journal for Science and Engineering, 44, 2, 2019. Crossref

  2. Latifi M.S., Numerical modeling of thermal-fluid behavior of the S-CO2 cooled pebble bed reactor, Alexandria Engineering Journal, 57, 4, 2018. Crossref

  3. Latifi M. S., Colangelo G., Starace G., A CFD study on the effect of size of fuel sphere on PBR core, Experimental and Computational Multiphase Flow, 2, 2, 2020. Crossref

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