In-situ stabilization of radioactively contaminated low-level solid wastes buried in shallow trenches: an assessment
The potential effectiveness of materials for in-situ encapsulation of low-level, radioactively contaminated solid waste buried in shallow trenches is enumerated. Cement, clay materials, and miscellaneous sorbents, aqueous and nonaqueous gelling fluids and their combinations are available to solidify contaminated free water in trenches, to fill open voids, and to minimize radionuclide mobility. The success of the grouting technique will depend on the availability of reliable geohydrologic data and laboratory development of a mix with enhanced sorption capacity for dominant radionuclides present in the trenches. A cement-bentonite-based grout mix with low consistency for pumping, several hours controlled rate of hardening, negligible bleeding, and more than 170 kPa (25 psi) compressive strength are a few of the suggested parameters in laboratory mix development. Cost estimates of a cement-bentonite-based grout mix indicate that effective and durable encapsulation can be accomplished at a reasonable cost (about $113 per cubic meter). However, extensive implementation of the method suggests the need for a field demonstration of the method. 53 references.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5088751
- Report Number(s):
- ORNL/TM-7130; TRN: 80-016611
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BENTONITE
SORPTIVE PROPERTIES
CEMENTS
ENCAPSULATION
TECHNOLOGY ASSESSMENT
LOW-LEVEL RADIOACTIVE WASTES
STABILITY
RADIOACTIVE WASTE PROCESSING
COST
GELS
GROUTING
IN-SITU PROCESSING
UNDERGROUND DISPOSAL
BUILDING MATERIALS
COLLOIDS
DISPERSIONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MANAGEMENT
MATERIALS
MINERALS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SURFACE PROPERTIES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
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