Numerical analysis of the ROCOM boron dilution benchmark experiment using the CUPID code

Cho, Yun Je; Yoon, Han Young

doi:10.1016/j.nucengdes.2018.11.005

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…The standard k-ε turbulence model was used. It performs very well for the boron dilution phenomenon [9]. The flow was considered as incompressible.…”

Section: Main Fluid Dynamics Modelmentioning

confidence: 99%

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Computational simulation of a test facility in reduced scale for analysis of boron dispersion in a pressurizer of an integral compact and modular reactor

Mazaira¹,

Garcı́a²,

Lira

et al. 2021

Braz. J. Rad. Sci.

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In an iPWR (integral pressurized water reactor), the pressurizer is located at the top of the reactor vessel; this configuration requires the investigation of the mechanisms adopted for the homogenization of boron. In previous work, three representative experiments were conducted in an experimental installation made of stainless steel with a volumetric scale equal to 1:200, representing one-fourth of the pressurizer of an iPWR. The test facility layout was mounted so that the test section was fed with water or saline solutions with different concentrations, representing scenarios of boration or deboration. To determine the concentration at the inlet and outlet of the test section, samples have been collected every 10 min during the experiments representing some scenarios. The main goal in this work was to investigate how well mixing during boron dilution transients in the pressurizer of a small modular reactor can be modelled accurately by CFD (Computational Fluid Dynamics) codes. Two CFD codes were used, the commercial ANSYS CFX and the open source CFD code OpenFOAM. The use of open source software such as OpenFOAM offers a way to CFD gain acceptance in the licensing. The results of the comparison of simulations with an experiment at the test section were presented and showed a very good agreement. It was verified that deviations are less than 4%, both codes can be used to accurately represent this phenomenon. In order to improve future experiments, the dispersion of the solution inside the test section is studied with the aim to propose positions for sensors. A first simple configuration is proposed, but some further simulations will be done to find an optimum configuration.

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“…The standard k-ε turbulence model was used. It performs very well for the boron dilution phenomenon [9]. The flow was considered as incompressible.…”

Section: Main Fluid Dynamics Modelmentioning

confidence: 99%

“…The boron concentration is modeled by the concentration field of a tracer solution. In this case, using sodium chloride (NaCl) as the tracer element [9]. Three experiments were conducted to evaluate the potential of the test facility to determine the concentration of the injected tracer element at the inlet/outlet of the test section.…”

mentioning

confidence: 99%

Computational simulation of a test facility in reduced scale for analysis of boron dispersion in a pressurizer of an integral compact and modular reactor

Mazaira¹,

Garcı́a²,

Lira

et al. 2021

Braz. J. Rad. Sci.

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show abstract

“…Cho and Yoon used a k − ε model to simulate turbulence in a reactor pressure vessel and calculate it in conjunction with the force concentration equation to obtain the concentration distribution of boron. 34 By comparing with the experiment, the combined model could effectively predict the change in the concentration of boron in the reactor vessel. In summary, the combination of standard k − ε models and concentration equations has been widely used in many fields, such as contaminant diffusion, nuclide dispersion simulation, and room ventilation.…”

Section: Introductionmentioning

confidence: 99%

“…From this model, the optimal ventilation scheme for the room was calculated. Cho and Yoon used a k−ε model to simulate turbulence in a reactor pressure vessel and calculate it in conjunction with the force concentration equation to obtain the concentration distribution of boron 34 . By comparing with the experiment, the combined model could effectively predict the change in the concentration of boron in the reactor vessel.…”

Section: Introductionmentioning

confidence: 99%

Analysis of infrared extinction performance of the smoke screen in the field

et al. 2022

Opt. Eng.

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. The prediction of infrared extinction performance is one of the indispensable factors for the research of smoke screen. So far, it is still short of an accurate numerical simulation for the infrared extinction performance after releasing smoke screen. We present a method for calculating the infrared extinction performance of smoke screen. The standard k − ε turbulence model and the concentration equation of smoke screen are combined to carry out numerical simulation research on the sedimentation and diffusion process of smoke screen in the field. The shape and mass concentration distribution of smoke screen are studied under different wind speeds and ground roughness. Lambert–Beer’s law is combined to calculate the infrared extinction area of the smoke screen under different conditions, and the influence law on the smoke screen extinction performance is analyzed under different conditions. The validity of the numerical simulation results is verified by the field test. It is a useful method for guiding the design of field experiments. This work is widely used in the evaluation of extinction performance and provided more information for use by decision makers.

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Study of boron diffusion models and dilution accidents in nuclear reactor: A comprehensive review

Zhang

et al. 2020

Annals of Nuclear Energy

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Numerical analysis of the ROCOM boron dilution benchmark experiment using the CUPID code

Cited by 14 publications

References 18 publications

Computational simulation of a test facility in reduced scale for analysis of boron dispersion in a pressurizer of an integral compact and modular reactor

Computational simulation of a test facility in reduced scale for analysis of boron dispersion in a pressurizer of an integral compact and modular reactor

Analysis of infrared extinction performance of the smoke screen in the field

Study of boron diffusion models and dilution accidents in nuclear reactor: A comprehensive review

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