Evaluation of 5-cm Centrifugal Contactor Hydraulic and Mass Transfer Performance for Caustic-Side Solvent Extraction of Cesium

Jr, Joseph F Birdwell

doi:10.2172/814114

Cited by 20 publications

(26 citation statements)

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“…Poor stage efficiencies from poor mixing during initial BOBCalixC6 CSSX testing were mitigated by modifying the contactor by increasing the size of the opening in the bottom of the rotor to make the contactor partially pumping. This modification increases liquid holdup in the mixing zone that, in turn, increases both the residence time and mixing intensity 27 . A similar modification was applied during one phase of NG-CSSX mass transfer testing.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

“…The previous BOBCalixC6 CSSX work did not use Cs-137, but instead used ICP/atomic emission spectroscopy to determine cesium concentration 27 . The 'cold' chemical analysis has the distinct disadvantage of low resolution for Cs, resulting in potentially large error at low concentrations.…”

Section: Reagents Usedmentioning

confidence: 99%

“…Unlike the initial test described above, the flow rates and phase ratios utilized in this test were the same as had been used in previous mass transfer tests on the BOBCalixC6 CSSX solvent. This testing scheme was intended to allow for the direct comparison of results with the results of tests performed in 2001 27 . In addition, a partially pumping contactor rotor was used.…”

Section: Mass Transfer Test Procedure-second Testmentioning

confidence: 99%

“…As described in more detail in Chapter 3, under pristine solvent conditions the minimum suppressor concentration with which the solvent can function is 0.25 mM 27 . This indicates that the deviation of the D Cs values shown in the ESS testing is the result of more than one process, as the guanidine levels are still more than enough for the solvent to function, were it pristine.…”

Section: Gc Quantification For the Degradation Of The Dcitgnidine Supmentioning

confidence: 99%

See 3 more Smart Citations

Next Generation Solvent Development for Caustic-Side Solvent Extraction of Cesium

Duncan¹,

Delmau²,

Ensor³

et al. 2013

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Section: Reagents Usedmentioning

confidence: 99%

Section: Mass Transfer Test Procedure-second Testmentioning

confidence: 99%

Section: Gc Quantification For the Degradation Of The Dcitgnidine Supmentioning

confidence: 99%

See 2 more Smart Citations

Next Generation Solvent Development for Caustic-Side Solvent Extraction of Cesium

Duncan¹,

Delmau²,

Ensor³

et al. 2013

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“…The modifications applied in the solids partitioning test have been found to increase cesium transfer efficiencies to acceptable levels. 3 Solutions were supplied to the contactor by piston-type metering pumps (Fluid Metering Inc., Model QV-2). The pump heads were equipped with 300 series stainless steel sleeves and pistons.…”

Section: Equipmentmentioning

confidence: 99%

Partitioning of Tank Waste Sludge in a 5-cm Centrifugal Contactor Under Caustic-Side Solvent Extraction Conditions

Birdwell¹

2001

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Free surface flow in the mixing zone of an annular centrifugal contactor

et al. 2007

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in Wiley InterScience (www.interscience.wiley.com).The annular centrifugal contactor has been developed as the central piece of equipment for advanced liquid-liquid extraction processes for use in recycling spent nuclear fuel. While a sufficient base of experience exists to support successful operation of current contactor technology, a more complete understanding of the fluid flow within the contactor would enable further advancements in design and operation of future units. In particular, an important characteristic of the flow that is not well understood and which significantly complicates computational modeling of the contactor is the complex free surface flow in the annular mixing zone. This study presents the results of time-dependent, multiphase computational fluid dynamics (CFD) modeling using the volume-of-fluid (VOF) interface tracking method to characterize the mixing zone in a model centrifugal contactor. Laser doppler velocimetry (LDV) measurements of the actual flow velocities within the contactor were also performed. The experimental results were compared with simulations using various turbulence modeling schemes. The CFD model predictions using a coarse grid large eddy simulation (LES) method are in good agreement with the experimental measurements and observations. 2007 American Institute of Chemical Engineers AIChE J, 54: 74-85, 2008

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Evaluation of 5-cm Centrifugal Contactor Hydraulic and Mass Transfer Performance for Caustic-Side Solvent Extraction of Cesium

Cited by 20 publications

References 0 publications

Next Generation Solvent Development for Caustic-Side Solvent Extraction of Cesium

Next Generation Solvent Development for Caustic-Side Solvent Extraction of Cesium

Partitioning of Tank Waste Sludge in a 5-cm Centrifugal Contactor Under Caustic-Side Solvent Extraction Conditions

Free surface flow in the mixing zone of an annular centrifugal contactor

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