Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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SEPARATION OF CsCl FROM LiCl-CsCl MOLTEN SALT BY COLD FINGER MELT CRYSTALLIZATION

  • Versey, Joshua R. (Department of Chemical and Materials Engineering and Nuclear Engineering Program University of Idaho Center for Advanced Energy Studies) ;
  • Phongikaroon, Supathorn (Department of Mechanical and Nuclear Engineering Virginia Commonwealth University) ;
  • Simpson, Michael F. (Department of Metallurgical Engineering University of Utah)
  • Received : 2013.09.24
  • Accepted : 2014.02.12
  • Published : 2014.06.25
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Abstract

This study provides a fundamental understanding of a cold finger melt crystallization technique by exploring the heat and mass transfer processes of cold finger separation. A series of experiments were performed using a simplified LiCl-CsCl system by varying initial CsCl concentrations (1, 3, 5, and 7.5 wt%), cold finger cooling rates (7.4, 9.8, 12.3, and 14.9 L/min), and separation times (5, 10, 15, and 30 min). Results showed a potential recycling rate of 0.36 g/min with a purity of 0.33 wt% CsCl in LiCl. A CsCl concentrated drip formation was found to decrease crystal purity especially for smaller crystal formations. Dimensionless heat and mass transfer correlations showed that separation production is primarily influenced by convective transfer controlled by cooling gas flow rate, where correlations are more accurate for slower cooling gas flow rates.

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