Durability of SRP waste glass: Effect of ground water pH

Technical Report · Wed Nov 19 04:00:00 EST 1980

OSTI ID:6262983

Wicks, G G

Effects of leachant pH on the rate of glass dissolution were measured. Waste glass powders were leached at room temperature and 90/sup 0/C in a CO/sub 2/-free nitrogen atmosphere. Following are results from this study: Glass corrosion at room temperature is very slow between pH values of 5 and 9. Above pH 9 and below pH 5 glass corrosion increases rapidly. At 90/sup 0/C, the glass corrosion rate generally increases and the parabolic pH curve narrowed with new critical pH values of about 6 and 8.5. Most repository ground waters now being considered by DOE fall within these regions of minimized leachability. Silica dissolution is perhaps the best measure of long-term glass corrosion. The pH data suggest that a nondestructive means of predicting glass corrosion behavior while in storage is to monitor the pH of ground waters near glass filled canisters.

• Research Organization: Savannah River Lab., Aiken, SC (USA). Technical Div.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6262983
• Report Number(s): DPST-80-675; ON: DE88000762
• Country of Publication: United States
• Language: English

Related Subjects

052000* -- Nuclear Fuels-- Waste Management
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALKALI METALS
BOROSILICATE GLASS
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
DISSOLUTION
ELEMENTS
GLASS
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
LEACHING
MANAGEMENT
MATERIALS
METALS
MINERALS
NATIONAL ORGANIZATIONS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
SAVANNAH RIVER PLANT
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE DISPOSAL
WASTE FORMS
WASTE MANAGEMENT
WASTES
WATER