Study on melt stratification and migration in debris bed using the moving particle semi-implicit method

Li, Gen; Wen, Panpan; Feng, Haobo; Zhang, Jun; Yan, Junjie

doi:10.1016/j.nucengdes.2019.110459

Cited by 27 publications

(3 citation statements)

References 27 publications

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“…The MPS method has been applied in nuclear engineering with fantastic achievement (7). Many phenomena were studied by using the MPS method, such as the stratification process (8-10), relocation process (11,12), euctactic case (13,14), ablation vessel (15), and solidification (16,17).…”

Section: Introductionmentioning

confidence: 99%

The Simulation of the Stratification Process of Some Liquid Salts by Using the Moving Particle Semi-Implicit Method

Yulianto

Mustari

Baliana

2022

J. Phys.: Conf. Ser.

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The use of liquid fuel is one of the developments in nuclear technology. Molten Salt Reactor leads the new technology in nuclear engineering in using liquid fuel. One of the interesting phenomena about using liquid fuel is how the inter-liquid fuel interacts, especially its stratification behavior. In this study, some components of the liquid salts, i.e. LiF-BeF2 (flibe), LiF-NaF-KF (flinak), and NaF-ZrF4 (nafzirf), paired with the Al liquid, were investigated to understand the stratification behavior of these liquids by simulation in the framework of the Moving Particle Semi-Implicit (MPS). The obtained results show the typical results of stratification with different physical properties. On the other hand, these results are good enough in explaining the interaction inter-liquid. In this study, it is obtained that the difference in density of the colliding liquid has a significant effect on the stratification process. The different result was obtained when explaining the temperature. The temperature of the colliding liquids does not have a significant effect on both the stratification process and the velocity profiles. These results are very important to conduct the next study about liquid salts.

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Section: Introductionmentioning

confidence: 99%

The Simulation of the Stratification Process of Some Liquid Salts by Using the Moving Particle Semi-Implicit Method

Yulianto

Mustari

Baliana

2022

J. Phys.: Conf. Ser.

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“…In such cases, it is difficult to calculate very large viscosity equivalent to solid state. In fact, the implicit calculations were adopted for high-viscous calculation in the previous studies [5,6,[9][10][11][12][13][14][15][16]20], and recently, Monaghan [7] proposed pair by pair implicit calculation algorithm which can avoid solving large matrix equations.…”

Section: Introductionmentioning

confidence: 99%

A physically consistent particle method for high-viscous free-surface flow calculation

Kondo

Fujiwara²,

Masaie³

et al. 2021

Comp. Part. Mech.

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Particle methods for high-viscous free-surface flows are of great use to capture flow behaviors which are intermediate between solid and liquid. In general, it is important for numerical methods to satisfy the fundamental laws of physics such as the conservation laws of mass and momentum and the thermodynamic laws. Especially, the angular momentum conservation is necessary to calculate rotational motion of high-viscous objects. However, most of the particle methods do not satisfy the physical laws in their spatially discretized system. The angular momentum conservation law is broken mostly because of the viscosity models, which may result in physically strange behavior when high-viscous free-surface flow is calculated. In this study, a physically consistent particle method for high-viscous free-surface flows is developed. The present method was verified, and its performance was shown with calculating flow in a rotating circular pipe, high-viscous Taylor–Couette flow, and offset collision of a high-viscous object.

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“…A method called a Moving Particle Semi-implicit (MPS) was developed for analyses of the interaction between incompressible media such as water and metal which are extensively used for industrial application [5,6]. During its development, it was used for interaction analyses between materials in nuclear field [7][8][9][10][11][12][13][14][15]. Regarding the eutectic reaction the MPS was developed to study the eutectic reaction between metals, i.e.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Molten Uranium With Electrical Penetrating Tube of a Boiling Water Reactor During Severe Accident

Wulandari

Sutanto

Mustari

2020

gnd

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INTERACTION OF MOLTEN URANIUM WITH ELECTRICAL PENETRATING TUBE OF A BOILING WATER REACTOR DURING SEVERE ACCIDENT. Fukushima accident was the first severe accident of a BWR type which the core was melted leading to RPV failure at the bottom head. Regarding its complex structures of the bottom head, the scheme of failure is different from that of previous reactor severe accidents that ever happened (i.e. TMI-2 and Chernobyl accidents). There is a lot of penetration tubes through the bottom head leading to a complex interaction between corium and the structures. Eutectic reaction is possible to happen due to high temperature leading to a rapid failure of the RPV. Therefore, it is important to understand the phenomenon of interaction between corium and the structures. In this study, an interaction between molten uranium and structure of electrical tube, one of the penetration tubes, was analyzed by using MPS-LER method. Fluid dynamics of the MPS-LER simulation was validated by experiments of fluid flow by using water and oil.Calculation results of the fluid flow showed a good agreement with that of experiments.The MPS-LER was applied to calculate the penetration rate of molten uranium which flowed through the wall of the electrical tube at the bottom head of a BWR. The penetration rate was high due to eutectic reaction. The rate achieved 555.56 µm/s. Conservatively, it took less than 1 minute of time for the molten uranium to melt the tube wall with a thickness of 1.232 cm.

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Study on melt stratification and migration in debris bed using the moving particle semi-implicit method

Cited by 27 publications

References 27 publications

The Simulation of the Stratification Process of Some Liquid Salts by Using the Moving Particle Semi-Implicit Method

The Simulation of the Stratification Process of Some Liquid Salts by Using the Moving Particle Semi-Implicit Method

A physically consistent particle method for high-viscous free-surface flow calculation

Interaction of Molten Uranium With Electrical Penetrating Tube of a Boiling Water Reactor During Severe Accident

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