Geochemical analysis of leachates from cement/low-level radioactive waste/soil systems
Laboratory experiments were conducted as part of the Special Waste Form Lysimeters/endash/Arid Program. These experiments were conducted to investigate the performance of solidified low-level nuclear waste in a typical arid, near-surface disposal site, and to evaluate the ability of laboratory tests to predict leaching in actual field conditions. Batch leaching, soil adsorption column, and soil/waste form column experiments were conducted using Portland III cement waste forms containing boiling-water reactor evaporator concentrate and ion-exchange resin waste. In order to understand the reaction chemistry of the cement waste form/soil/ground-water system, the compositions of the leachates from the laboratory experiments were studied with the aid of the MINTEQ ion speciation/solubility and mass transfer computer code. The purpose of this report is to describe the changes in leachate composition that occur during the course of the experiments, to discuss the geochemical modeling results, and to explore the factors controlling the major element chemistry of these leachates. 18 refs., 84 figs., 14 tabs.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 7056564
- Report Number(s):
- PNL-6544; ON: DE89001581
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
LEACHATES
CHEMICAL COMPOSITION
LOW-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
SOLID WASTES
LEACHING
FLOW RATE
FORECASTING
GROUND WATER
GROUTING
ION EXCHANGE MATERIALS
LYSIMETERS
M CODES
MATHEMATICAL MODELS
PORTLAND CEMENT
RADIOACTIVE WASTE MANAGEMENT
SOILS
VARIATIONS
BUILDING MATERIALS
CEMENTS
COMPUTER CODES
DISPERSIONS
DISSOLUTION
HYDROGEN COMPOUNDS
MANAGEMENT
MATERIALS
MEASURING INSTRUMENTS
MIXTURES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
SOLUTIONS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER
052002* - Nuclear Fuels- Waste Disposal & Storage
053000 - Nuclear Fuels- Environmental Aspects