Glass-surface area to solution-volume ratio and its implications to accelerated leach testing

Technical Report · Fri Oct 01 04:00:00 EDT 1982

OSTI ID:6672133

Pederson, L R; Buckwalter, C Q; McVay, G L; Riddle, B L

The value of glass surface area to solution volume ratio (SA/V) can strongly influence the leaching rate of PNL 76-68 glass. The leaching rate is largely governed by silicon solubility constraints. Silicic acid in solution reduced the elemental release of all glass components. No components are leached to depths greater than that of silicon. The presence of the reaction layer had no measurable effect on the rate of leaching. Accelerated leach testing is possible since PNL 76-68 glass leaching is solubility-controlled (except at very low SA/V values). A series of glasses leached with SA/V x time = constant will yield identical elemental release.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6672133
• Report Number(s): PNL-SA-10841; CONF-821107-25; ON: DE83002692
• Country of Publication: United States
• Language: English

Related Subjects

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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BOROSILICATE GLASS
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
GLASS
INFORMATION
LEACHING
MATERIALS
NUMERICAL DATA
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEMIMETALS
SEPARATION PROCESSES
SILICON
SURFACE AREA
SURFACE PROPERTIES
TESTING
TIME DEPENDENCE
WASTES