Characterization, Washing, Leaching, and Filtration of AZ-102 Sludge

Brooks, KP; Bredt, PR; Cooley, SK; Golcar, G.R.; Jagoda, LK; Rappe, KG; Urie, MW

doi:10.2172/760429

Cited by 20 publications

(25 citation statements)

References 2 publications

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“…The leach solution and second wash were based on the assumption that the solids in the Envelope A waste were Envelope D solids. The compositions of leach and 2 nd wash solutions from a PNNL study 9 on actual waste were used to generate the leach and 2 nd wash simulants.…”

Section: Hlw Sbs Recycle Simulantsmentioning

confidence: 99%

Waste Treatment Plant LAW Evaporation: Antifoam Performance

Baich¹

2004

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Section: Hlw Sbs Recycle Simulantsmentioning

confidence: 99%

Waste Treatment Plant LAW Evaporation: Antifoam Performance

Baich¹

2004

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“…As a result, the transient behavior seen after each backpulse plays a significant role in determining the overall efficiency of the filtration system. The majority of previous work with Hanford HLW was performed at relatively low solids concentrations (Brooks et al 1999, Brooks et al 2000a, Brooks et al 2000b, Poirier et al 2003. However, the intent of that previous work was simply to provide an estimate of the filter flux from samples of HLW to validate the use of this technology for solid/liquid separations.…”

Section: Pnnl Efforts To Model Flux Time Dependencementioning

confidence: 99%

A Brief Review of Filtration Studies for Waste Treatment at the Hanford Site

Daniel¹,

Schonewill²,

Shimskey³

et al. 2010

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SummaryThis document completes the requirements of Milestone 1-2, PNNL Draft Literature Review, discussed in the scope of work outlined in the EM-31 Support Project task plan WP-2.3.6-2010-1. The focus of task WP-2.3.6 is to improve the U.S. Department of Energy's (DOE's) understanding of filtration operations for high-level waste (HLW) to enhance filtration and cleaning efficiencies, thereby increasing process throughput and reducing the sodium demand (through acid neutralization). Developing the processes for fulfilling the cleaning/backpulsing requirements will result in more efficient operations for both the Hanford Tank Waste Treatment and Immobilization Plant (WTP) and the Savannah River Site (SRS), thereby increasing throughput by limiting cleaning cycles.The purpose of this document is to summarize Pacific Northwest National Laboratory's (PNNL's) literature review of historical filtration testing at the laboratory and of testing found in peer-reviewed journals. Eventually, the contents of this document will be merged with a literature review by SRS to produce a summary report for DOE of the results of previous filtration testing at the laboratories and the types of testing that still need to be completed to address the questions about improved filtration performance at WTP and SRS. To this end, this report presents 1) a review of the current state of crossflow filtration knowledge available in the peer-reviewed literature, 2) a detailed review of PNNLrelated filtration studies specific to the Hanford site, and 3) an overview of current waste filtration models developed by PNNL and suggested avenues for future model development.This extensive review provides a starting point to help achieve the ultimate goal of the current project, which is to identify technologies such as modifications to the process (e.g., reconfiguration of the filter geometry or changes to operational techniques) or the use of physical property modifiers that increase the sustainability of the filter process. Overall, two avenues of future model development are recommended: 1) determination of long-term filtration dynamics of actual waste and waste simulant slurries and 2) evaluation of the impact of solution chemistry on the rate of filtration and filter fouling. A better understanding of these long-term fouling dynamics and solution chemistry effects will help in developing better predictive models and improved process optimization.v

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“…The C-104 tank sludge sample was processed through the following unit operations to simulate the RPP-WTP project flowsheet: 1) washing; 2) leaching (leaching was done external to the CUF unit); and 3) filtration in the cell unit filter (CUF) system which was operated in HLRF hot cell "A" (Brooks et al, 2000a). The AZ-102 tank sludge sample was processed through the same unit operations in the CUF system (Brooks et al, 2000b).…”

Section: Hlw Glass Melter Feed Componentsmentioning

confidence: 99%

“…Sr/TRU precipitate and Cs and Tc ion exchange eluants, generated from LAW supernatant pretreatment unit operations were added. Both sludge samples were processed through the following unit operations to simulate the RPP-WTP project flowsheet: 1) initial characterization; 2) washing; 3) leaching; and 4) filtration in a crossflow filtration system (Brooks et al, 2000a) (Brooks et al, 2000b). Additional washing/leaching and solubility versus temperature studies were completed on a small subsample of C-104 tank sludge that was not vitrified (Lumetta et al, 2000).…”

mentioning

confidence: 99%

Vitrification and Product Testing of C-104 and AZ-102 Pretreated Sludge Mixed with Flowsheet Quantities of Secondary Wastes

Smith¹,

Bates²,

Goles³

et al. 2001

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SummaryThe U.S. Department of Energy (DOE) Office of River Protection (ORP) has acquired Hanford tank waste treatment services at a demonstration scale. The River Protection Project Waste Treatment Plant (RPP-WTP) team is responsible for producing an immobilized (vitrified) high-level waste (IHLW) waste form. Pacific Northwest National Laboratory, hereafter referred to as PNNL, has been contracted to produce and test a vitrified IHLW waste form from two Envelope D high-level waste (HLW) samples previously supplied to the RPP-WTP project by DOE.The primary objective for vitrifying the HLW samples is to generate glass products for subsequent product testing. The scope of the Vitrification and Product Testing has been divided into eight work elements: 1) Glass Fabrication, 2) Chemical Composition, 3) Radiochemical Composition, 4) Crystalline and Non-crystalline Phase Determination, 5) Release Rate (PCT), 6) Toxicity Characteristic Leaching Procedure (TCLP), 7) Total volatile organic and semi-volatile organic analyses (VOA and SVOA), and 8) WAPS, regulatory, and de-listing testing. The work presented in this report is from only the following 5 work elements: 1) Glass Fabrication, 2) Chemical Composition, 3) Radiochemical Composition, 4) Crystalline and Non-crystalline Phase Determination, and 5) Release Rate (PCT). These work elements will help demonstrate the RPP-WTP projects ability to satisfy the product requirements concerning, chemical and radionuclide reporting, waste loading, identification and quantification of crystalline and non-crystalline phases, and waste form leachability. Results from work elements 6 through 8, i.e. VOA, SVOA, dioxins, furans, PCBs, and total cyanide and sulfide analyses are reported in a separate document (Goheen et al., WTP-RPT-010).Two pretreated tank sludge samples, high-level wastes (241-C-104 and 241-AZ-102) hereafter referred to as C-104 and AZ-102 along with a HLW process simulant (know as the HLW Process Blank) were prepared as melter feeds for vitrification. Due to scheduling constraints and small initial sample size of the pretreated tank 241-AZ-102 sludge, this sample was divided into two samples that were vitrified separately (i.e. AZ-102, Melt 1 and AZ-102, Melt 2). The analyzed compositions of the pretreated C-104 and AZ-102 sludge wastes were used by Catholic University of America's (CUA) Vitreous State Laboratory (VSL) to determine the target glass composition.The two tank sludge samples, were processed through pretreatment chemical washing and leaching processes, and the pretreated sludges were converted to high-level waste (HLW) glass after flowsheet quantities of secondary wastes, i.e. Sr/TRU precipitate and Cs and Tc ion exchange eluants, generated from LAW supernatant pretreatment unit operations were added. Both sludge samples were processed through the following unit operations to simulate the RPP-WTP project flowsheet: 1) initial characterization; 2) washing; 3) leaching; and 4) filtration in a crossflow filtration system (Brooks et al., 2000a) (Brooks et al.,...

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Characterization, Washing, Leaching, and Filtration of AZ-102 Sludge

Cited by 20 publications

References 2 publications

Waste Treatment Plant LAW Evaporation: Antifoam Performance

Waste Treatment Plant LAW Evaporation: Antifoam Performance

A Brief Review of Filtration Studies for Waste Treatment at the Hanford Site

Vitrification and Product Testing of C-104 and AZ-102 Pretreated Sludge Mixed with Flowsheet Quantities of Secondary Wastes

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