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Accelerated Leach Test(s) Program. Annual report

Technical Report ·
DOI:https://doi.org/10.2172/5557445· OSTI ID:5557445
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This report summarizes the work performed for the Accelerated Leach Test(s) Program at Brookhaven National Laboratory in Fiscal Year 1985 under the sponsorship of the US Department of Energy's Low-Level Waste Management Program (LLWMP). Programmatic activities were concentrated in three areas, as listed and described in the following paragraphs. (1) A literature survey of reported leaching mechanisms, available mathematical models and factors that affect leaching of LLW forms has been compiled. Mechanisms which have been identified include diffusion, dissolution, ion exchange, corrosion and surface effects. Available mathematical models are based on diffusion as the predominant mechanism. Although numerous factors that affect leaching have been identified, they have been conveniently categorized as factors related to the entire leaching system, to the leachant or to the waste form. A report has been published on the results of this literature survey. (2) A computerized data base of LLW leaching data and mathematical models is being developed. The data are being used for model evaluation by curve fitting and statistical analysis according to standard procedures of statistical quality control. (3) Long-term tests on portland cement, bitumen and vinyl ester-styrene (VES) polymer waste forms are underway which are designed to identify and evaluate factors that accelerate leaching without changing the mechanisms. Results on the effect of temperature on leachability indicate that the leach rates of cement and VES waste forms increase with increasing temperature, whereas, the leach rate of bitumen is little affected.
Research Organization:
Brookhaven National Lab., Upton, NY (USA)
DOE Contract Number:
AC02-76CH00016
OSTI ID:
5557445
Report Number(s):
BNL-51955; ON: DE86012035
Country of Publication:
United States
Language:
English

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Related Subjects

052002 -- Nuclear Fuels-- Waste Disposal & Storage
053000* -- Nuclear Fuels-- Environmental Aspects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ALKYLATED AROMATICS
AROMATICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
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CESIUM 137
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DISSOLUTION
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HOURS LIVING RADIOISOTOPES
HYDROCARBONS
INFORMATION
INFORMATION SYSTEMS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEACHING
LOW-LEVEL RADIOACTIVE WASTES
MATERIALS
MONOMERS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PORTLAND CEMENT
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
RESEARCH PROGRAMS
SEPARATION PROCESSES
STRONTIUM 85
STRONTIUM ISOTOPES
STYRENE
TAR
VINYL MONOMERS
WASTE FORMS
WASTES
YEARS LIVING RADIOISOTOPES