The paper reports about an experimental investigation on natural circulation and air-injection enhanced circulation performed adopting different fluids. The work is aimed at providing information on the basic mechanisms proposed in the design of future reactors relying on such circulation mechanisms for core cooling. Though the final objective of the research is the study of heavy metal cooling, the work is here limited to non-metallic fluids. The working fluid adopted in past analyses was water. Further experimental campaigns were recently performed using the Novec™ HFE-7100 fluid, providing additional information on basic phenomena and the related scaling laws. The new fluid has a greater density and a greater thermal expansion coefficient with respect to water. Air was adopted for gas injection. Both natural circulation and gas-injection enhanced circulation are addressed in this work, drawing quantitative conclusions about the observed parametric trends. A systematic comparison is performed with the results obtained in previous experimental activities using water.
- Nuclear Engineering Division
Experimental Study on Natural Circulation and Air-Injection Enhanced Circulation With Different Fluids
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Ambrosini, W, Forgione, N, Oriolo, F, Semeraro, E, & Tarantino, M. "Experimental Study on Natural Circulation and Air-Injection Enhanced Circulation With Different Fluids." Proceedings of the 16th International Conference on Nuclear Engineering. Volume 4: Structural Integrity; Next Generation Systems; Safety and Security; Low Level Waste Management and Decommissioning; Near Term Deployment: Plant Designs, Licensing, Construction, Workforce and Public Acceptance. Orlando, Florida, USA. May 11–15, 2008. pp. 421-427. ASME. https://doi.org/10.1115/ICONE16-48707
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