Results from a one-year leach test: long-term use of MCC-1. [Three leachants-pure water; silicic acid/sodium bicarbonate solution; K, Mg, and Na chloride brine]
Technical Report
·
OSTI ID:5258031
This paper presents results from the long-term use of the MCC-1P Static Leach Test Method which has already been used for short-term testing and for comparing waste forms. Data were obtained on the leaching behavior of PNL 76-68 glass over a 1-year period. The results of this test led to the following conclusions. The MCC-1P Static Leach Test Method has been demonstrated to be useful for studies up to 1 year at temperatures up to 90/sup 0/C. Accurate measurements of leachant volume at the start and the end of the test are important. PNL 76-68 glass appears to continue to alter, albeit at a significantly reduced rate, even though the solution concentrations of many elements are saturated or supersaturated with respect to alteration phases. The original surface of the glass was still present after 1 year, evidence that the gel layer will slowly get thicker but dissolution will not occur, or will occur at extremely slow rates. At 40/sup 0/C, more than 1 year is required to reach saturation of some important elements. Even at 90/sup 0/C, testing beyond 1 year is needed to define alteration rates and details of the leaching mechanisms.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5258031
- Report Number(s):
- PNL-SA-10036; CONF-820636-5; ON: DE82018774
- Country of Publication:
- United States
- Language:
- English
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Mon Aug 01 00:00:00 EDT 1983
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Fri Dec 31 23:00:00 EST 1982
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Related Subjects
052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360604 -- Materials-- Corrosion
Erosion
& Degradation
ACID CARBONATES
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METALS
BRINES
CESIUM
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
GLASS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
LEACHING
MANAGEMENT
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE WASTE PROCESSING
SEMIMETALS
SEPARATION PROCESSES
SILICIC ACID
SILICON
SODIUM COMPOUNDS
SOLIDIFICATION
STRONTIUM
TIME DEPENDENCE
VITRIFICATION
WASTE MANAGEMENT
WASTE PROCESSING
WATER
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360604 -- Materials-- Corrosion
Erosion
& Degradation
ACID CARBONATES
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METALS
BRINES
CESIUM
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
GLASS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
LEACHING
MANAGEMENT
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE WASTE PROCESSING
SEMIMETALS
SEPARATION PROCESSES
SILICIC ACID
SILICON
SODIUM COMPOUNDS
SOLIDIFICATION
STRONTIUM
TIME DEPENDENCE
VITRIFICATION
WASTE MANAGEMENT
WASTE PROCESSING
WATER