CFD Analysis of a Decay Tank and a Siphon Breaker for an Innovative Integrated Passive Safety System for a Research Reactor

Lee, Kwon-Yeong; Yoon, Hyun-Gi; Park, Dong Kyou

doi:10.1155/2017/3106278

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…If we apply the same methodology used above to analyze the temperature field, that falls in the range [360.20,528.10] (in Kelvin), we get the intervals [1,3] and [1,40] calculated using the crosscorrelation, followed by thresholding of the differentiation. The best segment is [1,40], computed by solving expression (8). Then, we seek the optimum gamma to compute SPDMD dynamic modes using a list of 20𝛾 values logarithmically spaced from 10 to 600.…”

Section: Resultsmentioning

confidence: 99%

“…More recently the occurrence of the natural circulation in nuclear research reactors has been described in the literature by studies focusing mainly: the prevention of a severe accident [8], the effect of an unprotected reactivity insertion on the dynamic response of Materials Testing Reactor -MTR research reactors under natural circulation regime [9], the investigation of flow reversal from downward forced to upward natural circulation [10], the stability of the natural circulation and its suppression due to the presence of oscillations [11], [12].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic mode decomposition of numerical data in natural circulation

Faccini

2021

Braz. J. Rad. Sci.

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Dynamic mode decomposition (DMD) has been used for experimental and numerical data analysis in fluid dynamics. Despite of its advantages, the application of the DMD methodology to investigate the natural circulation in nuclear reactors are very scarce in literature. In this paper it is applied the traditional DMD and its variation, the sparsity-promoting dynamic mode decomposition (SPDMD), for analysis of temperature and velocity fields data, generated by computational simulation of an experimental setup in reduced scale, similar to a heat removal system by natural circulation of a pool-type research reactor. Firstly the numerical data is partitioned, using a space-time correlation approach, in order to identify fundamental sequences to compute the dynamic modes. Next, the DMD and SPDMD methodologies are applied over each subsequence to obtain the dynamic modes of the temperature and velocity fields. Finally the flow fields are reconstructed and compared with the original numerical data. The conclusion is that the SPDMD performs better than DMD to represent both the temperature and velocity data.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic mode decomposition of numerical data in natural circulation

Faccini

2021

Braz. J. Rad. Sci.

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“…In the forced convection, the primary cooling system is designed to have a downward flow through the core channel for normal operation [1,5,6].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design On N16 Decay Chamber For Modified TRIGA-2000 With Plate-Type Fuel

Dibyo¹,

Pinem

Wardhani³

2018

Jurnal Pengembangan Energi Nuklir

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Conceptual Design On N16 Decay Chamber For Modified TRIGA-2000 With Plate-Type Fuel. the TRIGA-2000 is a research reactor in bandung that will be modified using plate-type fuel. The reactor core cooling system is changed from the natural convection cooling mode to the forced convection mode. The purpose of the study is to assess the conceptual design for the decay chamber of N16 nuclide in the primary cooling system of the reactor. In this design, the hold-up system decays the nuclide of N16 resulted from neutron activation product. In the period of 50 seconds, the activity of N16 (T1/2= 7.13 seconds) decays 7 time from half life to low level. The cube shape of decay chamber is provided a plate with 4 hollows and facility to flush the cavitation bubbles. The decay chamber, which is submerged into the bulk shielding as located outside of the reactor pool. The conceptual design uses the Fluent software compared with the analytical estimation for flow velocity in the decay chamber. The result shows a good agreement range with the analytical estimations. The uniform flow profile can be obtained at the velocity of about 0.4 m/s. Water flow life time of 50 seconds in the decay chamber with the capacity of 3.5 m3 is able to decay the N16 nuclide to low level. This decay chamber is expected to contribute in completing the design of reactor primary coolant system using the forced convection mode.

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CFD Analysis of a Decay Tank and a Siphon Breaker for an Innovative Integrated Passive Safety System for a Research Reactor

Cited by 2 publications

References 6 publications

Dynamic mode decomposition of numerical data in natural circulation

Dynamic mode decomposition of numerical data in natural circulation

Conceptual Design On N16 Decay Chamber For Modified TRIGA-2000 With Plate-Type Fuel

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