Slurry Pump Mixing Effectiveness in Tank 50h

Lee, S; Dimenna, R Richard

doi:10.2172/927604

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…The model calculated fluid velocities in the plane of the telescoping transfer pump at 300 and 500 seconds after the start of the calculation. 17 The model showed (see Figure 3) that at 300 seconds, there was a strong vertical flow on the wall farthest away from the pump (as much as 0.23 ft/s). Therefore, strong vertical flow patterns would be expected everywhere in the tank as the pump rotates and the jets impact the wall.…”

Section: Figure 2 Tank 50h Tank Topmentioning

confidence: 99%

“…The modeling showed a minimum fluid velocity of 0.012 ft/s in the plane of the telescoping transfer pump (in Figures 22 and 23 of reference 17). 17 Since the fluid velocities are greater than or equal to 0.012 ft/s, droplets smaller than 20 micron will follow the liquid and be dispersed throughout the tank (with no cooling coils). The CFD calculations placed the slurry pump in riser B2.…”

Section: Blending Isopar L ®mentioning

confidence: 99%

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Assessment of the Ability of Standard Slurry Pumps to Mix Miscible and Immiscible Liquids in Tank 50h

Poirier

2011

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Section: Figure 2 Tank 50h Tank Topmentioning

confidence: 99%

Section: Blending Isopar L ®mentioning

confidence: 99%

Assessment of the Ability of Standard Slurry Pumps to Mix Miscible and Immiscible Liquids in Tank 50h

Poirier

2011

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“…To determine the pump requirements to mix solids with liquids in Tank 50H, the author reviewed the pilot-scale blending work performed for the Small Column Ion Exchange Process (SCIX) 11 , SRNL computational fluid dynamics (CFD) modeling 15 , Tank 50H operating experience, and the technical literature, and applied the results to Tank 50H to determine the number, size, and operating parameters of pumps needed to mix the solids with the liquid in Tank 50H. Table 1 shows specific dimensional and performance aspects of the various mixer pumps deployed in the SRS Tank Farm.…”

Section: Approachmentioning

confidence: 99%

“…15 The model included the center column, the pump columns, and the pump housing, but it did not include the cooling coils. The pump(s) rotated at 1/5 rpm.…”

Section: Cfd Analysismentioning

confidence: 99%

Assessment of the Ability of Standard Slurry Pumps to Mix Solids With Liquids in Tank 50h

Poirier

2011

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The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

Gauglitz¹,

Wells²,

Bamberger³

et al. 2010

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Executive SummaryRadioactive waste that is currently stored in large underground tanks at the Hanford Site will be staged in selected double-shell tanks (DSTs) and then transferred to the Waste Treatment and Immobilization Plant (WTP). Before being transferred, the waste will be mixed, sampled, and characterized to determine if the waste composition meets the waste feed specifications. Washington River Protection Solutions (WRPS) is conducting a Tank Mixing and Sampling Demonstration Program to determine the mixing effectiveness of the current baseline mixing system that uses two jet mixer pumps to mobilize and mix waste in DSTs and to determine the adequacy of the planned sampling method. The overall purpose of the demonstration program is to mitigate the technical risk associated with the mixing and sampling systems meeting the feed certification requirements for transferring waste to the WTP.A critical aspect of meeting the feed certification requirements is ensuring that the collected samples will adequately represent the contents of the tank and that all batches of transferred waste are sufficiently uniform so that they all are equivalent to the characterized samples. However, the tank waste contains slurries of solid particles that settle and may become progressively more concentrated towards the bottom of the tank. Obtaining a perfectly uniform distribution of waste in the DSTs with a mixing system may not be possible. To determine how close this ideal can be approached, the expected performance of the DST mixing and sampling systems must be quantified. There have been a number of laboratory studies and full-scale tank farm studies that evaluated mixing behavior; these studies are discussed later in this report. However, these studies do not provide adequate quantitative information to evaluate the performance of the planned sampling and the batch uniformity. Accordingly, WRPS' demonstration program is focusing specifically on quantifying the uniformity of samples and batch transferred material to reduce the technical risk associated with these systems.The first phase of the demonstration program is to conduct scaled tests that appropriately match fullscale behavior and to evaluate sampling methodologies and the uniformity of batch transfers. The initial scaled testing will use non-cohesive particles where the particles do not have cohesive interactions that would cause the particles to stick together. The purpose of this report is to analyze existing data and evaluate whether scaled mixing tests with cohesive simulants are needed to meet the overall objectives of the small-scale mixing demonstration program. This evaluation will focus on estimating the role of cohesive particle interactions on various physical phenomena that occur in parts of the mixing process. A specific focus of the evaluation will be on the uniformity of suspended solids in the mixed region.The evaluation shows that cohesive particle interaction will have multiple effects through a number of different mechanisms. Some of the effects ...

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Slurry Pump Mixing Effectiveness in Tank 50h

Cited by 3 publications

References 5 publications

Assessment of the Ability of Standard Slurry Pumps to Mix Miscible and Immiscible Liquids in Tank 50h

Assessment of the Ability of Standard Slurry Pumps to Mix Miscible and Immiscible Liquids in Tank 50h

Assessment of the Ability of Standard Slurry Pumps to Mix Solids With Liquids in Tank 50h

The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

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