Molten uranium eutectic interaction on iron-alloy by MPS method

Mustari, Asril Pramutadi Andi; Oka, Yoshiaki

doi:10.1016/j.nucengdes.2014.07.028

Cited by 29 publications

(14 citation statements)

References 9 publications

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“…A model of eutectic reaction was included into the MPS called as MPS with liquefaction of eutectic reaction (MPS-LER). Experiments of TREAT and Pb-Sn interaction were used for validation of the MPS-LER [9][10][11][12]. Calculation of the eutectic reaction includes two steps.…”

Section: Methodology Mps-ler Methodsmentioning

confidence: 99%

“…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%

“…Regarding the eutectic reaction the MPS was developed to study the eutectic reaction between metals, i.e. ironalloy, Pb-Sn [9][10][11].The developed MPS code is called as MPS method with Liquefaction of Eutectic Reaction (MPS-LER). It was validated with TREAT experiments and the simulation showed a good agreement with experimental results [12].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodology Mps-ler Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…This formulation is referred as the standard flux method in this paper. There are however some circumstances where Equation (41) does not guarantee the conservation of the total thermal energy because of the surface vector not being symmetric for a pair of particles i and j, ie, ⟨S(x)⟩ ij ≠ −⟨S(x)⟩ ji . For the conservation of the total thermal energy, the surface vector between particles i and j must satisfy ⟨S(x)⟩ ij = −⟨S(x)⟩ ji .…”

Section: Conserving Lsmps Methods For Thermal Problemsmentioning

confidence: 99%

“…Therefore, the accurate interpolation is no longer possible even if the least‐square formulation is applied. Although particle methods have been successfully applied for thermal problems such as the heat conduction and natural convection, the thermocapilary flow, the semisolid forging, the plasma arc welding, the laser welding, the direct laser interference patterning, the molten core‐concrete interaction for a nuclear reactor, the melt freezing for a nuclear reactor, the eutectic interaction of molten uranium, and the stratification and solidification/melting for a nuclear reactor, that is not the case for the least‐square formulations, which were not used in the analyses listed above. There are some works in which the thermal problems are simulated by using the first‐order particle methods.…”

Section: Introductionmentioning

confidence: 99%

Modification of the LSMPS method for the conservation of the thermal energy in laser irradiation processes

Tanaka

Cardoso

Bahai

2018

Numerical Meth Engineering

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Summary In this work, new least‐square moving particle semi‐implicit (LSMPS) formulations for the modeling of the heat conduction in laser irradiation processes for both thick blocks and thin plates are developed. These new LSMPS formulations guarantee the conservation of the total thermal energy during the heat exchange between particles. The conservation of the thermal energy in the LSMPS method was implemented together with multiresolution techniques for the discretization of the domain with particles of different sizes so that a better characterization of the thermal gradients in the vicinity of the laser beam can be obtained. The simulation of laser irradiation processes for thin plates is still very challenging for particle methods with spherical particles and this is essentially because it is difficult to accommodate a minimum number of particles along the thickness direction without increasing considerably the resolution or the number of particles in the entire plate. In order to overcome this difficulty, a new multiresolution method based on particles with ellipsoidal shapes was also developed for a more efficient modeling of the laser irradiation in thin plates. By conducting the heat conduction simulations, in which the standard LSMPS method can provide accurate temperature distribution and by comparing the results with an analytical solution, it was confirmed that the proposed method is as accurate as the standard LSMPS method. Moreover, the heat conduction with an external heat source, in which the total thermal energy is not conserved by using the standard LSMPS method, was successfully simulated by using the proposed method. The simulations of laser irradiations were also conducted, and the validity of the proposed method has been confirmed by comparing numerical results with experimental data.

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Moving particle semi-implicit simulation on the molten Wood’s metal downward relocation process

et al. 2021

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Molten uranium eutectic interaction on iron-alloy by MPS method

Cited by 29 publications

References 9 publications

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

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

Modification of the LSMPS method for the conservation of the thermal energy in laser irradiation processes

Moving particle semi-implicit simulation on the molten Wood’s metal downward relocation process

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