An experimental study on the effect of liquid properties on the counter-current flow limitation (CCFL) during gas/liquid counter-current two-phase flow in a 1/30 scaled-down of Pressurized Water Reactor (PWR) hot leg geometry

Astyanto, Achilleus Hermawan; Indarto, Indarto; Kirkland, Karen Vierow; Deendarlianto,

doi:10.1016/j.nucengdes.2022.112052

Cited by 3 publications

(4 citation statements)

References 42 publications

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“…initiates flooding followed by churn. Therefore, a rather sharp decrease of δ/D is further reported to correspond to the transition from a stratified to flooding regime [16].…”

Section: Methodsmentioning

confidence: 90%

A Brief on Optical-based Investigation towards The Interfacial Behaviors during High Viscous Liquid / Gas Countercurrent Two-Phase Flow in a Complex Conduit Representing 1/30 Down-Scaled of PWR Hot Leg Geometry

Astyanto

Indarto

Deendarlianto

2023

Int.J.Appl.Sci.Smart Technol.

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The present work briefly investigates liquid/gas countercurrent two-phase flow phenomena which can be specifically found in a mitigation during an accidental scenario in the operation of a nuclear reactor. A comprehensive knowledge on the corresponding phenomena is obviously important to avoid the failure on the cooling mechanism. Here, a pair of fluid containing high viscous liquid/gas flows through a complex conduit representing 1/30 scaled-down of PWR hot leg’s typical geometry. Furthermore, the flow structures were visually observed, while the film thicknesses are extracted by an image processing algorithm through the corresponding optical-tabulated data. The obtained results reveal that a rather sharp decrease in liquid film corresponds to the flow regime transition.

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“…initiates flooding followed by churn. Therefore, a rather sharp decrease of δ/D is further reported to correspond to the transition from a stratified to flooding regime [16].…”

Section: Methodsmentioning

confidence: 90%

A Brief on Optical-based Investigation towards The Interfacial Behaviors during High Viscous Liquid / Gas Countercurrent Two-Phase Flow in a Complex Conduit Representing 1/30 Down-Scaled of PWR Hot Leg Geometry

Astyanto

Indarto

Deendarlianto

2023

Int.J.Appl.Sci.Smart Technol.

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“…The experiments were carried out during a research framework to investigate the characteristics of counter-current flow in a small-scale facility representing a down-scaled model of German-Konvoi PWR primary circuit [9][10][11][12]13,14]. The experiment apparatus, which is schematically depicted in Figure 1, has been particularly developed in the Laboratory of Fluid Mechanics and Heat Transfers of Universitas Gadjah Mada, Indonesia.…”

Section: Methodsmentioning

confidence: 99%

“…The experiment apparatus, which is schematically depicted in Figure 1, has been particularly developed in the Laboratory of Fluid Mechanics and Heat Transfers of Universitas Gadjah Mada, Indonesia. Details of construction of the facility, comprising the fluid supply and lighting systems, and also experimental procedures including the measurement techniques are described by previous reports [9][10][11][12]13]. Therefore, in the present reports only the test section is briefly explained in the following.…”

Section: Methodsmentioning

confidence: 99%

“…During numerous studies of factors influencing the CCFL characteristics, effects of channel geometry have been widely reported as the dominant variable to be investigated, whereas effects of physical properties of working fluids have also been proposed, but in a rather small portion [12]. However, the operation of the real nuclear power plants involves dynamic characteristics in the fluid physical properties since it is relatively accompanied by both heat and mass transfers during the flow.…”

Section: Introductionmentioning

confidence: 99%

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An experimental investigation on CCFL characteristics during gas/low surface tension liquid counter-current two-phase flow in a small-scaling PWR hot leg typical geometry

Astyanto,

Saleh,

Indarto

et al. 2024

E3S Web Conf.

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A sharp increase in world energy demands which further results in another large progress in the development of nuclear energy establishes comprehensive developments on corresponding mitigation studies. Therefore, as a scenario of accident called LOCA is fundamentally considered, the related phenomena, i.e., the counter-current flow followed by flooding in the primary circuit of PWR, is of a great importance. The present work investigates characteristics of the flooding during a pair of gas/low surface tension liquid counter-current two-phase flow in a complex conduit representing a down-scaled of PWR hot leg typical geometry. Visual observations were obviously carried out to observe the flow phenomenology, while flow parameters were frequently varied. A typical result reveals that the gas flow rate to initiate the flooding decreases with the increase of liquid flow rate. Moreover, exhibiting locations of the onset called locus, a front flooding tends to occur during relatively low liquid flow rates while the higher liquid flow rates exhibit another flooding namely rear flooding. Accordingly, the present investigation provides a package of valuable information on a particular understanding towards the flooding characteristics to overcome the efforts on promoting safety managements on the operation of nuclear power plants..

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Development of Ccfl Prediction Model for Pwr Reactor Pressurizer Surge Line Based on Multi-Step Lstm Model

CUI,

Chen,

XIAO

et al. 2024

Preprint

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An experimental study on the effect of liquid properties on the counter-current flow limitation (CCFL) during gas/liquid counter-current two-phase flow in a 1/30 scaled-down of Pressurized Water Reactor (PWR) hot leg geometry

Cited by 3 publications

References 42 publications

A Brief on Optical-based Investigation towards The Interfacial Behaviors during High Viscous Liquid / Gas Countercurrent Two-Phase Flow in a Complex Conduit Representing 1/30 Down-Scaled of PWR Hot Leg Geometry

A Brief on Optical-based Investigation towards The Interfacial Behaviors during High Viscous Liquid / Gas Countercurrent Two-Phase Flow in a Complex Conduit Representing 1/30 Down-Scaled of PWR Hot Leg Geometry

An experimental investigation on CCFL characteristics during gas/low surface tension liquid counter-current two-phase flow in a small-scaling PWR hot leg typical geometry

Development of Ccfl Prediction Model for Pwr Reactor Pressurizer Surge Line Based on Multi-Step Lstm Model

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