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AMMON N. WILLIAMS,MICHAEL PACK,SUPATHORN PHONGIKAROON 한국원자력학회 2015 Nuclear Engineering and Technology Vol.47 No.7
Separation of cesium chloride (CsCl) and strontium chloride (SrCl2) from the lithiumchloride-potassium chloride (LiCl-KCl) salt was studied using a melt crystallization processsimilar to the reverse vertical Bridgeman growth technique. A ternary SrCl2-LiCl-KCl saltwas explored at similar growth rates (1.8e5 mm/h) and compared with CsCl ternary resultsto identify similarities. Quaternary experiments were also conducted and compared withthe ternary cases to identify trends and possible limitations to the separations process. Inthe ternary case, as much as 68% of the total salt could be recycled per batch process. In thequaternary experiments, separation of Cs and Sr was nearly identical at the slower rates;however, as the growth rate increased, SrCl2 separated more easily than CsCl. The quaternaryresults show less separation and rate dependence than in both ternary cases. As anestimated result, only 51% of the total salt could be recycled per batch. Furthermore, twomodels have been explored to further understand the growth process and separation. Acomparison of the experimental and modeling results reveals that the nonmixed model fitsreasonably well with the ternary and quaternary data sets. A dimensional analysis wasperformed and a correlation was identified to semipredict the segregation coefficient.
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