High Level Waste System Impacts from Acid Dissolution of Sludge

KETUSKY, EDWARD

Savannah River Site (S.C.)

关键词: Corrosion;    Sludges;    Sensitivity;    Flowsheets;    Testing;   

DOI  :  10.2172/890068
RP-ID  :  CBU-PIT-2005-00260R1
RP-ID  :  DE-AC09-96SR18500
RP-ID  :  890068

美国|英语

来源: UNT Digital Library

【 摘 要 】

This research evaluates the ability of OLI{copyright} equilibrium based software to forecast Savannah River Site High Level Waste system impacts from oxalic acid dissolution of Tank 1-15 sludge heels. Without further laboratory and field testing, only the use of oxalic acid can be considered plausible to support sludge heel dissolution on multiple tanks. Using OLI{copyright} and available test results, a dissolution model is constructed and validated. Material and energy balances, coupled with the model, identify potential safety concerns. Overpressurization and overheating are shown to be unlikely. Corrosion induced hydrogen could, however, overwhelm the tank ventilation. While pH adjustment can restore the minimal hydrogen generation, resultant precipitates will notably increase the sludge volume. OLI{copyright} is used to develop a flowsheet such that additional sludge vitrification canisters and other negative system impacts are minimized. Sensitivity analyses are used to assess the processability impacts from variations in the sludge/quantities of acids.