Numerical assessment of pyrochemical process performance for PEACER system

Bae, Jong Myon; Nam, Hyun-Yeol; Yi, Kyung Woo; Park, Byung Gi; Hwang, Il Soon

doi:10.1016/j.nucengdes.2010.02.005

Cited by 14 publications

(8 citation statements)

References 3 publications

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“…Comparatively, this model accounts for more details in the processing, such as flows condition, surface area change, and solubility limits of solutes. There are also other models supported by commercial software, such as ANSYS and COMSOL [115,116,117]. In addition to electrorefining, molten salt clean-up processing is another area needed to be studied since there are still some actinides, rare earth, and active fission products left in removed molten salt.…”

Section: Electrolysis Modelmentioning

confidence: 99%

Rare Earth Electrochemical Property Measurements and Phase Diagram Development in a Complex Molten Salt Mixture for Molten Salt Recycle

Zhang

Guo

2018

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Section: Electrolysis Modelmentioning

confidence: 99%

Rare Earth Electrochemical Property Measurements and Phase Diagram Development in a Complex Molten Salt Mixture for Molten Salt Recycle

Zhang

Guo

2018

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“…For electrochemical facilities, a few models of the electrorefiner are being developed that would generate time series of PM residuals [15][16][17][18][19]. The intent is to detect off-normal conditions that could indicate misdirection of Pu.…”

Section: Model-based Predictionsmentioning

confidence: 99%

“…PM data can also include very frequent high-dimensional spectral data from gamma detectors [20][21][22], or low-dimensional flow and/or in-tank volume data from flow meters or in-tank dip tubes. In some cases, PM data can be relatively high quality, such as in-line mass or volume flow measurements, and some current research is aimed at high-quality in-line SNM accountability measurements for electrochemical facilities [14][15][16][17][18][19] and aqueous facilities [7,8,20,21].…”

Section: A11 Nmamentioning

confidence: 99%

“…Traditional NMA at large reprocessing facilities closes the material balance (MB) approximately every 10 to 30 days around an entire material balance area, which typically consists of multiple process stages. Figure 1 is a picture of SNM flows at a generic electrochemical reprocessing facility [13][14][15][16][17][18][19], which is anticipated to have large SNM throughput but much less processing equipment than a similar-throughput aqueous reprocessing facility [7][8][9]. Both PM and NMA measurements are available at aqueous and electrochemical reprocessing facilities.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Statistical Testing for Nuclear Material Accounting Data and/or Process Monitoring Data in Nuclear Safeguards

et al. 2015

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Abstract:The aim of nuclear safeguards is to ensure that special nuclear material is used for peaceful purposes. Historically, nuclear material accounting (NMA) has provided the quantitative basis for monitoring for nuclear material loss or diversion, and process monitoring (PM) data is collected by the operator to monitor the process. PM data typically support NMA in various ways, often by providing a basis to estimate some of the in-process nuclear material inventory. We develop options for combining PM residuals and NMA residuals (residual = measurement − prediction), using a hybrid of period-driven and data-driven hypothesis testing. The modified statistical tests can be used on time series of NMA residuals (the NMA residual is the familiar material balance), or on a combination of PM and NMA residuals. The PM residuals can be generated on a fixed time schedule or as events occur.

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“…In contrast, Bae et al coupled 3D hydrodynamic results with 1D electrochemical kinetic simulation, but the diffusion boundary layer thickness was only calculated with the limited data points of concentration distributions. 21 Recently, several researchers have developed 3D computational models that fully couple electrochemistry and hydrodynamics; however, these models require extensive computational resources and suffer from fully-coupled multispecies calculations. 9,[22][23][24][25][26] Therefore, this paper combines a 3D hydrodynamic model with a 2D multi-species electrochemical model to mitigate the computational costs and address the convergence problem in a fully coupled 3D model.…”

mentioning

confidence: 99%

Multi-Species Hydrodynamic Electrochemical Modeling with Liquid Metal and Rotating Cylinder Electrodes in Molten Salt

Kang

Park

Choi

2018

J. Electrochem. Soc.

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The accurate prediction of a hydrodynamic electrochemical system with radioactive materials can reduce the economic costs and radiological risk of repeated experiments. Such a prediction requires the computationally rich coupling of hydrodynamic phenomena and electrochemical reactions at a multi-dimensional domain, especially for multiple species in heterogeneous phases. This study develops a finite element method model to simulate the transport phenomena and electrochemical reactions of U, Pu, and Nd simultaneously in a molten salt metallurgical electrorefining system. The results are validated against lab-scale experimental data conducted in high temperature LiCl-KCl molten salt. The experiment conducted in the Argonne National Laboratory has a unique electrochemical cell with a combination of liquid metal and rotating solid cylinder electrodes. The model successfully simulates the time-dependent multi-species behaviors of the system such as dissolution rates from the liquid metal anode and deposit composition on the rotating cylinder electrode. In particular, it successfully predicts the transition time of depositing element at the cathode from U to Pu, which is very important information for product quality and process monitoring. In addition, it can catch the change of thermodynamic behaviors of Pu by forming intermetallic compounds with liquid Cd metal.

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Numerical assessment of pyrochemical process performance for PEACER system

Cited by 14 publications

References 3 publications

Rare Earth Electrochemical Property Measurements and Phase Diagram Development in a Complex Molten Salt Mixture for Molten Salt Recycle

Rare Earth Electrochemical Property Measurements and Phase Diagram Development in a Complex Molten Salt Mixture for Molten Salt Recycle

Hybrid Statistical Testing for Nuclear Material Accounting Data and/or Process Monitoring Data in Nuclear Safeguards

Multi-Species Hydrodynamic Electrochemical Modeling with Liquid Metal and Rotating Cylinder Electrodes in Molten Salt

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