Continuous-flow leaching studies of crushed and cored SYNROC

Journal Article · Mon Feb 01 04:00:00 EST 1982 · Nucl. Technol.; (United States)

OSTI ID:6993420

Coles, D G; Bazan, F

Both crushed (150- to 300- ..mu..m) and cored (1,8- mm-diam) samples of SYNROC have been leached with single-pass continuous-flow leaching equipment. Crushed samples of cesium-hollandite were also leached in a similar experiment. Temperatures used were 25/sup 0/ and 75/sup 0/C and leachates were 0.03 N NaHCO/sub 3/ and distilled water. Leaching rates from SYNROC-C were ranked cesium > strontium greater than or equal to calcium > barium > zirconium. A comparison of leaching rates is made between crushed SYNROC, cored SYNROC, and Pacific Northwest Laboratory 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, cesium leach rates from SYNROC compare well with both sodium and neptunium leached from the glass. The other elements leached from SYNROC are lower than sodium and neptunium leached from glass. They also vary for each element, while glass shows nearly the same leach rate for both sodium and neptunium.

• Research Organization: University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 6993420
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 56:2; ISSN NUTYB
• Country of Publication: United States
• Language: English

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12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACID CARBONATES
ACTINIDES
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM
CESIUM
CHALCOGENIDES
COMMINUTION
COMPARATIVE EVALUATIONS
CRUSHING
DISPERSIONS
DISSOLUTION
DRILL CORES
ELEMENTS
GLASS
HIGH-LEVEL RADIOACTIVE WASTES
HOLLANDITE
LEACHATES
LEACHING
MANAGEMENT
MATERIALS
MEDIUM TEMPERATURE
METALS
MINERALS
MIXTURES
NEPTUNIUM
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
ROCKS
SEPARATION PROCESSES
SIZE
SODIUM
SODIUM COMPOUNDS
SOLUTIONS
STRONTIUM
SURFACE AREA
SURFACE PROPERTIES
SYNROC PROCESS
SYNTHETIC MATERIALS
SYNTHETIC ROCKS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSURANIUM ELEMENTS
WASTE FORMS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
ZIRCONIUM