Heat Transfer Analysis for Fixed CST and Rf Columns

Lee, Si Young

doi:10.2172/918146

Cited by 7 publications

(13 citation statements)

References 10 publications

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“…The customer requested that calculations be conducted in such a manner as to ensure conservative and bounding results for the maximum temperatures achievable using the current baseline design. This effort expands on the work performed and documented previously [2][3][4].…”

Section: Introductionmentioning

confidence: 64%

“…In this situation, the natural convection flow regime for the air-cooled design should be estimated based on the non-dimensional Grashof number (Gr L ), which is the parameter describing the ratio of buoyancy to viscous forces for a vertically-oriented cylinder with height L. The Grashof number performs much the same function for natural convection flow as the Reynolds (Re) number does for forced convection. Under normal conditions one may expect that the laminar-to-turbulent transition will take place between A typical natural convective heat transfer coefficient (h w ) of 1.5 W/m 2 K was used as an external wall boundary condition from previous work [2,10,11]. The value of the heat transfer coefficient can be justified on the following basis.…”

Section: Srnl-sti-2010-00570mentioning

confidence: 99%

“…Following the previous methodology [2][3][4], the current thermal modeling evaluations assumed the maximum bounding cesium loading considered possible based on current knowledge regarding CST media and assumed project controls with regard to feed qualification. Since this cesium loading was considerably higher than the nominal loading conditions in SRS waste, fractionally-decreased thermal loading cases were also evaluated.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Modeling Analysis of CST Media in the Small Column Ion Exchange Project

Lee¹

2010

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Section: Introductionmentioning

confidence: 64%

Section: Srnl-sti-2010-00570mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Modeling Analysis of CST Media in the Small Column Ion Exchange Project

Lee¹

2010

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“…• A typical natural convective heat transfer coefficient (h w ) of 1.5 W/m 2 K was used as an external wall boundary condition based on previous analysis [3]. Table 1.…”

Section: Solution Approach and Modeling Assumptionsmentioning

confidence: 99%

“…Previous analysis led to the consideration of this design simplification for RF, since the baseline column design with center cooling was developed assuming that CST media would be used for cesium removal which has a higher volumetric heat load [3]. Temperature distributions and maximum temperatures across the column during SCIX process operations and upset conditions were conducted with a focus on SCIX implementation at Hanford [2].…”

Section: Introductionmentioning

confidence: 99%

Thermal Modeling of Ion Exchange Columns With Spherical Rf Resin

Lee¹,

King²

2009

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Thermal analysis for ion-exchange column system

Lee

King

2013

Nuclear Engineering and Design

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-Models have been developed to simulate the thermal characteristics of crystalline silicotitanate ion exchange media fully loaded with radioactive cesium either in a column configuration or distributed within a waste storage tank. This work was conducted to support the design and operation of a waste treatment process focused on treating dissolved, high-sodium salt waste solutions for the removal of specific radionuclides. The ion exchange column will be installed inside a high level waste storage tank at the Savannah River Site. After cesium loading, the ion exchange media may be transferred to the waste tank floor for interim storage. Models were used to predict temperature profiles in these areas of the system where the cesium-loaded media is expected to lead to localized regions of elevated temperature due to radiolytic decay. Normal operating conditions and accident scenarios (including loss of solution flow, inadvertent drainage, and loss of active cooling) were evaluated for the ion exchange column using bounding conditions to establish the design safety basis. The modeling results demonstrate that the baseline design using one central and four outer cooling tubes provides a highly efficient cooling mechanism for reducing the maximum column temperature. In-tank modeling results revealed that an idealized hemispherical mound shape leads to the highest tank floor temperatures. In contrast, even large volumes of CST distributed in a flat layer with a cylindrical shape do not result in significant floor heating.

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Heat Transfer Analysis for Fixed CST and Rf Columns

Cited by 7 publications

References 10 publications

Thermal Modeling Analysis of CST Media in the Small Column Ion Exchange Project

Thermal Modeling Analysis of CST Media in the Small Column Ion Exchange Project

Thermal Modeling of Ion Exchange Columns With Spherical Rf Resin

Thermal analysis for ion-exchange column system

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