Ion Recognition Approach to Volume Reduction of Alkaline Tank Waste by Separation and Recycle of Sodium Hydroxide and Sodium Nitrate

Moyer, Bruce A. ; Marchand, Alan P. ; Bonnesen, Peter V. ; Bryan, Jeffrey C. ; Haverlock, Tamara J.

University of North Texas (United States)

关键词: Sludges;    Flowsheets;    Waste Retrieval;    Sodium Nitrates;    Sodium Hydroxides;   

DOI  :  10.2172/825066
RP-ID  :  DOE/ER/14936
RP-ID  :  FG07-98ER14936
RP-ID  :  825066

美国|英语

来源: UNT Digital Library

【 摘 要 】

This research was intended to provide the scientific foundation upon which the feasibility of liquid-liquid extraction chemistry for bulk reduction of the volume of high-activity tank waste can be evaluated. Primary focus has been on sodium hydroxide separation, with potential Hanford application. Value in sodium hydroxide separation can potentially be found in alternative flowsheets for treatment and disposal of low-activity salt waste. Additional value can be expected in recycle of sodium hydroxide for use in waste retrieval and sludge washing, whereupon additions of fresh sodium hydroxide to the waste can be avoided. Potential savings are large both because of the huge cost of vitrification of the low-activity waste stream and because volume reduction of high-activity wastes could obviate construction of costly new tanks. Toward these ends, the conceptual development begun in the original proposal was extended with the formulation of eight fundamental approaches that could be undertaken for extraction of sodium hydroxide.