Actual Waste Demonstration of the Nitric-Glycolic Flowsheet for Sludge Batch 9 Qualification

Technical Report · Thu Sep 01 00:00:00 EDT 2016

DOI:https://doi.org/10.2172/1323879· OSTI ID:1323879

Pareizs, J. M. ^[1]; Martino, C. J. ^[1]; Reboul, S. H. ^[1]; Coleman, C. J. ^[1]; Edwards, T. B. ^[1]; Johnson, F. C. ^[1]

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1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

For each sludge batch that is processed in the Defense Waste Processing Facility (DWPF), the Savannah River National Laboratory (SRNL) performs qualification testing to demonstrate that the sludge batch is processable. Testing performed by the Savannah River National Laboratory has shown glycolic acid to be effective in replacing the function of formic acid in the DWPF chemical process. The nitric-glycolic flowsheet reduces mercury, significantly lowers the catalytic generation of hydrogen and ammonia which could allow purge reduction in the Sludge Receipt and Adjustment Tank (SRAT), stabilizes the pH and chemistry in the SRAT and the Slurry Mix Evaporator (SME), allows for effective rheology adjustment, and is favorable with respect to melter flammability. In order to implement the new flowsheet, SRAT and SME cycles, designated SC-18, were performed using a Sludge Batch (SB) 9 slurry blended from SB8 Tank 40H and Tank 51H samples. The SRAT cycle involved adding nitric and glycolic acids to the sludge, refluxing to steam strip mercury, and dewatering to a targeted solids concentration. Data collected during the SRAT cycle included offgas analyses, process temperatures, heat transfer, and pH measurements. The SME cycle demonstrated the addition of glass frit and the replication of six canister decontamination additions. The demonstration concluded with dewatering to a targeted solids concentration. Data collected during the SME cycle included offgas analyses, process temperatures, heat transfer, and pH measurements. Slurry and condensate samples were collected for subsequent analysis

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
• Sponsoring Organization: USDOE Office of Environmental Management (EM)
• DOE Contract Number: AC09-08SR22470
• OSTI ID: 1323879
• Report Number(s): SRNL-STI-2016-00327; TRN: US1601910
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
GLYCOLIC ACID
FLOWSHEETS
TANKS
SLURRIES
SAVANNAH RIVER PLANT
NITRIC ACID
SLUDGES
MERCURY
CONCENTRATION RATIO
HEAT TRANSFER
WATER REMOVAL
AMMONIA
PH VALUE
WASTE PROCESSING
HYDROGEN
GASEOUS WASTES
ABUNDANCE
CHEMICAL ANALYSIS
FLAMMABILITY
FEASIBILITY STUDIES
CHEMICAL REACTIONS
CONDENSATES
RHEOLOGY
DWPF
sludge
qualification
sludge batch 9
tank farm