Defense Waste Processing Facility Simulant Chemical Processing Cell Studies for Sludge Batch 9

“…In addition, there is no reason to evaluate the operating window with respect to hydrogen formation for the nitric-glycolic acid flowsheet as the hydrogen generation will be much lower than for comparable processing for the nitric-formic acid flowsheet. 2,12 An extensive report on hydrogen generation in nitricglycolic acid flowsheet runs was completed to predict the maximum hydrogen generation rate that DWPF might experience based on SRNL testing. 13 The predicted composition of Tank 40 before and after the addition from H Canyon Tank 16.4 for Scenario 4 is summarized in Table 2-3, Table 2-4, and Table 2-5.…”

Section: Tank 40 Compositional Estimatesmentioning

confidence: 99%

Impacts of the Addition of Sodium Reactor Experiment (SRE) and DR-3 Fuel from H-Canyon to Tank 40 on Acid Stoichiometry and Hydrogen Production

Lambert

2020

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H-Canyon plans to discard Sodium Reactor Experiment (SRE) material that is currently stored in Tanks 16.3 and 16.4. Savannah River Remediation (SRR) determined that a portion of the SRE material can be added to Sludge Batch 9 (SB9) in Tank 40 and the remainder will be added to Sludge Batch 10 (SB10) that is currently being prepared in Tank 51. A processing flowsheet for both the nitric-formic acid flowsheet and the nitric-glycolic acid flowsheet were previously developed for SB9 sludge-only and coupled operation with the Actinide Removal Process-Modular Caustic Side Solvent Extraction Unit (ARP-MCU) and the Salt Waste Processing Facility (SWPF). Due to the compositional change in Tank 40 after the addition of SRE material, it is necessary to determine the influence on the acid stoichiometry operating window and hydrogen production for SB9 processing.

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“… Hydrogen generation  Nitrogen oxide generation  Anion conversions  Hg recovery/removal Data from SB7, SB7b, SB8, and SB9 simulant 3,6 and real-waste 7,8 testing have been reviewed and reanalyzed to identify any effects of ruthenium source selection on processing under the nitric-formic flowsheet. Due to processing complications during testing and a lack of existing data, only SB8 and SB9 testing data was employed when considering offgas generation.…”

Section: List Of Figuresmentioning

confidence: 99%

Recommendation of ruthenium source for sludge batch flowsheet studies

Woodham¹

2017

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Included herein is a preliminary analysis of previously-generated data from sludge batches 7a, 7b, 8, and 9 sludge simulant and real-waste testing, performed to recommend a form of ruthenium for future sludge batch simulant testing under the nitric-formic flowsheet. Focus is given to reactions present in the Sludge Receipt and Adjustment Tank cycle, given that this cycle historically produces the most changes in chemical composition during Chemical Process Cell processing. Data is presented and analyzed for several runs performed under the nitric-formic flowsheet, with consideration given to effects on the production of hydrogen gas, nitrous oxide gas, consumption of formate, conversion of nitrite to nitrate, and the removal and recovery of mercury during processing. Additionally, a brief discussion is given to the effect of ruthenium source selection under the nitric-glycolic flowsheet. An analysis of data generated from scaled demonstration testing, sludge batch 9 qualification testing, and antifoam degradation testing under the nitric-glycolic flowsheet is presented. Experimental parameters of interest under the nitric-glycolic flowsheet include N 2 O production, glycolate destruction, conversion of glycolate to formate and oxalate, and the conversion of nitrite to nitrate. To date, the number of real-waste experiments that have been performed under the nitric-glycolic flowsheet is insufficient to provide a complete understanding of the effects of ruthenium source selection in simulant experiments with regard to fidelity to real-waste testing. Therefore, a determination of comparability between the two ruthenium sources as employed under the nitric-glycolic flowsheet is made based on available data in order to inform ruthenium source selection for future testing under the nitric-glycolic flowsheet.

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Defense Waste Processing Facility Simulant Chemical Processing Cell Studies for Sludge Batch 9

Cited by 7 publications

References 5 publications

Sludge Washing and Demonstration of the DWPF Nitric/Formic Flowsheet in the SRNL Shielded Cells for Sludge Batch 9 Qualification

Sludge Washing and Demonstration of the DWPF Nitric/Formic Flowsheet in the SRNL Shielded Cells for Sludge Batch 9 Qualification

Impacts of the Addition of Sodium Reactor Experiment (SRE) and DR-3 Fuel from H-Canyon to Tank 40 on Acid Stoichiometry and Hydrogen Production

Recommendation of ruthenium source for sludge batch flowsheet studies

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