skip to main content

Title: 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.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
5866165
Report Number(s):
PNL-7918
ON: DE92007511
DOE Contract Number:
AC06-76RL01830
Resource Type:
Technical Report
Research Org:
Pacific Northwest Lab., Richland, WA (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 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; MANAGEMENT; MATERIALS; NATIONAL ORGANIZATIONS; PROCESSING; PYROLYSIS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; THERMOCHEMICAL PROCESSES; US DOE; US ERDA; US ORGANIZATIONS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES 052001* -- Nuclear Fuels-- Waste Processing; 052002 -- Nuclear Fuels-- Waste Disposal & Storage