Innovative technologies and unit operations available for potential in situ and ex situ treatment of waste and residuals for Hanford single-shell tanks

In July 1990, the Third Party Technical Workshop -- Hanford Site Single-Shell Tank Waste and Residuals'' was held in Spokane, Washington. The objective of the workshop was to identify, discuss, and rate innovative technologies that have not been seriously explored for treatment of single-shell tank waste and residuals. Ten nationally-recognized waste management experts were asked to attend the workshop and to bring their ideas on how to treat this unique waste stream either in situ'' (treat in place) or ex situ'' (remove and treat). The long-term objective of this initiative was to assist the US Department of Energy-Richland Operations Office and Westinghouse Hanford Company in partially fulfilling a milestone to identify an appropriate means of disposing of waste, tanks, contaminated piping and soils by January 1999. A total of 11 ex situ and 11 in situ applied technologies with potential applicability to single-shell tank waste and residuals were identified and discussed in the workshop. An additional 12 nonapplied, innovative (brainstormed) technologies were also identified.