Continuous-flow leaching studies of crushed and cored SYNROC

Conference · Mon Aug 31 04:00:00 EDT 1981

OSTI ID:5925396

Coles, D G; Bazan, F

Both crushed (150 to 300 ..mu..m) and cored (1.8 mm diameter) samples of SYNROC have been leached with the single-pass continuous-flow leaching equipment. Crushed samples of Cs-hollandite were also leached in a similar experiment. Temperatures used were 25/sup 0/C and 75/sup 0/C and leachates were 0.03 N NaHCO/sub 3/ and distilled water. Leaching rates from SYNROC C were ranked Cs > Sr greater than or equal to Ca > Ba > Zr. A comparison of leaching rates is made between crushed SYNROC, cored SYNROC, and PNL 76-68 glass beads. This comparison depends on how the surface areas are determined for each sample. Based on geometric surface areas for SYNROC cores and glass beads, Cs leach rates from SYNROC compare well with both Na and Np leached from the glass. The other elements leached from SYNROC are lower than Na and Np leached from glass. They also vary for each element while glass shows nearly the same leach rate for both Na and Np.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5925396
• Report Number(s): UCRL-84679-Rev.1; CONF-810962-1; ON: DE82000344
• Country of Publication: United States
• Language: English

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ACTINIDES
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