Experimental study on gas-injection enhanced circulation performed with the CIRCE facility

G. Benamati, C. Foletti, N. Forgione, F. Oriolo, G. Scaddozzo, M. Tarantino

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This paper describes the results of an experimental campaign concerning the possibility of achieving a steady state circulation by gas-injection in a pool containing lead-bismuth eutectic (LBE) as working fluid. The activity was aimed at gaining information about the basic mechanisms of the gas injection enhanced circulation intended as a pumping system for a liquid metal cooled reactor. In particular, the paper is focused on the experimental work performed in the CIRCE large-scale facility, installed at the ENEA Brasimone Centre for studying the fluid-dynamic and operating behaviour of ADS reactor plants cooled by LBE. The gas enhanced circulation tests were carried out for different LBE temperatures (from 200 to 320 °C), under isothermal conditions and with a wide range of argon injected flow rates (from 0.5 to 7.0 Nl/s). The gas is injected from the bottom of the riser, by means of an appropriate nozzle, and the liquid metal flow rate is measured by a Venturi-Nozzle flow meter installed in the single phase part of the test section. The obtained results allowed formulating a characteristic curve of the system and evaluating the void fraction distribution along the riser path by means differential pressure measurements, which play an important role to generating the driving force for the circulation. © 2006 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)768 - 777
Number of pages10
JournalNuclear Engineering and Design
Issue number7
Publication statusPublished - Apr 2007
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

Cite this

Benamati, G., Foletti, C., Forgione, N., Oriolo, F., Scaddozzo, G., & Tarantino, M. (2007). Experimental study on gas-injection enhanced circulation performed with the CIRCE facility. Nuclear Engineering and Design, 237(7), 768 - 777. https://doi.org/10.1016/j.nucengdes.2006.09.005