Permanganate Oxidation of Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT) Simulants Larger Scale Protocol Runs - Chemical Process Cell (CPC) Nominal and Foamover Conditions

Siegfried, Matthew; Ramsey, W.G.; Williams, Matthew

doi:10.2172/1701701

Cited by 7 publications

(12 citation statements)

References 2 publications

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“…Unless a foamover occurs, no antifoam is expected in the condensate based on this testing. A planned permanganate destruction process 21 is designed to destroy ≥68 mg/L glycolate in the Recycle Collection Tank (RCT) with a Permanganate to Glycolate molar ratio of ~5.7. The molar ratio of ~5.7 may be too low for the 6 mg/L glycolate concentration in these experiments.…”

Section: Downstream Impacts Discussionmentioning

confidence: 99%

Antifoam Development for Eliminating Flammability Hazards and Decreasing Cycle Time in the Defense Waste Processing Facility

Howe

Woodham

HUNTER

et al. 2021

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A special thanks to Alex Nikolov and Darsh Wasan of the Illinois Institute of Technology for their expertise in foam and antifoamers, in helping us to develop the research program, to evaluate the results and to identify candidates for testing, and especially for introducing us to Kalman Koczo of Momentive Performance Materials who supplied us with the Momentive™ Y-17112.A special thanks to Gita Golcar for her identification of most of the antifoam candidates that we tested, including Evonik Surfynol ® MD20.We had great support from Meagan Kinard, Katherine Miles, Austin Coleman, and Daniel Jones in helping us to set up, develop R&D directions, perform the experiments, and so much more in finishing these tasks.Thanks to Mark Fowley and Andy Foreman for designing and installing the portable table that the RC1 equipment is assembled onto.Thanks to Christopher Verst for calculating radiation dose approximations and operating the J.L Shepherd Model 484 Co-60 gamma irradiator.Thanks to Mason Clark of DWPF Engineering for his support in the planning and execution of this testing.We had great support from our interns, Jackie Do from the University of Georgia and Maggie Hansen from Clemson University. Jackie and Maggie did a great job in helping prepare the equipment, procedures, R&D directions, and iControl software for the antifoam experiments.

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Section: Downstream Impacts Discussionmentioning

confidence: 99%

Antifoam Development for Eliminating Flammability Hazards and Decreasing Cycle Time in the Defense Waste Processing Facility

Howe

Woodham

HUNTER

et al. 2021

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“…The simulant was prepared using reagent grade chemicals in distilled water and, in some cases, a SRAT sludge component was included. The SRAT sludge component (identified as SB9-NG) was made in Aiken County Technology Laboratory (ACTL) and information of its constituents can be found elsewhere [16]. The SRAT sludge product contributed 125 mg of glycolate per kg of solution with additional formate, oxalate and nitrate.…”

Section: Simulant For Testingmentioning

confidence: 99%

“…This value corresponded to the highest permanganate to glycolate molar ratio that would be expected to be used in DWPF. At the time of the writing of this report, the recommended molar ratio of permanganate to glycolate was determined to be 5.7 to 1, for low and nominal glycolate concentrations [16].…”

Section: Simulant For Testingmentioning

confidence: 99%

Impact of Permanganate Oxidation of Glycolate on Corrosion of the Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT), Transfer-line and Waste Tank Materials of Construction (MoC)

Fuentes

2020

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“…The SRS Defense Waste Processing Facility (DWPF) is currently planning to implement an ambient temperature alkaline permanganate process for the oxidation of glycolate and this proposed approach is based on a similar process (Zamecnik et al 2019;Siegfried et al 2019;Nash and Siegfried 2020).…”

Section: Line 5 -Chemical Destruction Of Organics Using Permanganatementioning

confidence: 99%

Evaluation of Technologies for Enhancing Grout for Immobilizing Hanford Supplemental Low-Activity Waste (SLAW)

Skeen

Langston

McCabe

et al. 2020

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An expert panel consisting of the document authors was assembled by Washington River Protection Solutions, LLC (WRPS) and tasked with (1) identifying technical and regulatory limitations to treating and disposing of grouted low-activity waste (LAW), and (2) with identifying and evaluating a wide range of technical solutions to these limitations. The analysis included technologies to allow inventory management and/or improve retention of iodine, technetium, and nitrate either in the waste packages, or within the Integrated Disposal Facility (IDF), and, technologies to ensure regulated organics are below Resource Conservation and Recovery Act of 1976 (RCRA) Land Disposal Restriction (LDR) levels.The expert panel completed their analysis in three distinct phases. In Phase I, the team reviewed the chemical and physical characteristics of the most recent projected supplemental LAW (SLAW) feed vector along with disposal site waste acceptance criteria and the fiscal year 2019 results from Pacific Northwest National Laboratory that identified the level of improvement that would be needed to meet onsite disposal requirements in the IDF (Asmussen et al. 2019a). The two regulatory constraints targeted for technology solutions by the expert panel were (1) current estimates based on performance assessment fate-andtransport modeling indicate that if the entire quantity of LAW currently designated for supplemental treatment were solidified as a cementitious material, nitrate, 99-Tc, and 129-I could exceed groundwater standards after DOE's time of compliance (1,000 years) but within 10,000 years after IDF closure and (2) LAW may contain RCRA LDR organics at levels that require removal to meet LDR concentration-based limits. It should also be noted that the first issue is only applicable to on-site disposal, not offsite at WCS and is based on calculations that assume either a low-performing grout is used, or high-performance grout does not maintain its performance (SRNL-RP-2018-00687). Asmussen et al. (2019a) estimated that the inventory of grouted SLAW could meet IDF groundwater requirements if the release rate of nitrate, 99-Tc, and 129-I were reduced by a factor of approximately 3.2, 10, and 32, respectively versus baseline formulation performance.In Phase II, an extensive list of technologies and engineering approaches was identified and subjected to an initial assessment by the group. Current knowledge associated with technology maturation needs and constraints to implementation at Hanford were recorded in 13 distinct categories. In the final phase of the process (Phase III), the expert panel selected 7 of the 13 categories for qualitative rating and a series of meetings were held between the expert panel to discuss and rate each technology in each category. All ratings were developed by consensus. After the qualitative rating was complete, a numerical scoring criterion for each category was applied and a composite score for the individual technologies was calculated. An uncertainty score was also developed for each technolo...

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Permanganate Oxidation of Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT) Simulants Larger Scale Protocol Runs - Chemical Process Cell (CPC) Nominal and Foamover Conditions

Cited by 7 publications

References 2 publications

Antifoam Development for Eliminating Flammability Hazards and Decreasing Cycle Time in the Defense Waste Processing Facility

Antifoam Development for Eliminating Flammability Hazards and Decreasing Cycle Time in the Defense Waste Processing Facility

Impact of Permanganate Oxidation of Glycolate on Corrosion of the Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT), Transfer-line and Waste Tank Materials of Construction (MoC)

Evaluation of Technologies for Enhancing Grout for Immobilizing Hanford Supplemental Low-Activity Waste (SLAW)

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