Preliminary assessment of candidate immobilization technologies for retrieved single-shell tank wastes
This report describes the initial work that has been performed to select technologies for immobilization of wastes that may be retrieved from Hanford single-shell tanks (SSTs). Two classes of waste will require immobilization. One is the combined high-level waste/transuranic (HLW/TRU) fraction, the other the low-level waste (LLW) fraction. A number of potential immobilization technologies are identified for each class of waste. Immobilization technologies were initially selected based on a number of considerations, including (1) the waste loading that could likely be achieved within the constraint of producing acceptable waste forms, (2) process flexibility (primarily compatibility with anticipated waste variability), (3) process complexity, and (4) state of development. Immobilization technologies selected for further development include the following: for HLW/TRU waste -- borosilicate glass, lead-iron phosphate glass, glass-calcine composites, glass-ceramics, and cement based forms; for non-denitrated LLW -- grout, laxtex-modified concrete, and polyethylene; and for denitrated LLW -- silicate glass, phosphate glass, and clay calcination or tailored ceramic in various matrices.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5866165
- Report Number(s):
- PNL-7918; ON: DE92007511
- Country of Publication:
- United States
- Language:
- English
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ALPHA-BEARING WASTES
RADIOACTIVE WASTE MANAGEMENT
HIGH-LEVEL RADIOACTIVE WASTES
LOW-LEVEL RADIOACTIVE WASTES
CALCINATION
CEMENTS
GLASS
HANFORD RESERVATION
RADIOACTIVE WASTE PROCESSING
STORAGE FACILITIES
TANKS
VITRIFICATION
WASTE FORMS
BUILDING MATERIALS
CHEMICAL REACTIONS
CONTAINERS
DECOMPOSITION
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MATERIALS
NATIONAL ORGANIZATIONS
PROCESSING
PYROLYSIS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
THERMOCHEMICAL PROCESSES
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
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