Enhanced heat transfer and reduced pressure loss with U-pattern of helical wire spacer arrangement for liquid metal cooled-fast reactor fuel assembly

Jeong, Yeong Shin; Kim, Ji Yong; Bang, In Cheol

doi:10.1016/j.anucene.2019.106971

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…Furthermore, swirl generated from wire wrap spacers can promote the mixing of coolant, thus improving convective heat transfer between the coolant and the fuel rod. On the other hand, the wake behind wire may cause the reduction of the local flow, which can generate hot spots 66 . More importantly, manufacturing of large diameter wire and winding it into a fuel rod will face great challenges when the absolute gap between the fuel rods is too large, which may make the grid spacer scheme perhaps the only option at this time.…”

Section: Fa Design Of Lfrsmentioning

confidence: 99%

Review of fuel assembly design in lead‐based fast reactors and research progress in fuel assembly of China initiative accelerator driven system

Sheng

et al. 2021

Int J Energy Res

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Summary Lead‐based fast reactor is one of the most promising fourth‐generation nuclear energy systems. Fuel assembly design is a key technology for the research and development of lead‐based fast reactor. The current status of typical lead‐based reactors and fuel assembly design schemes in the world are reviewed in this paper, and also the key technical parameters and design features of fuel assembly are summarized, with the advantages and disadvantages discussed. A hexagonal fuel assembly that can achieve both “passive” and “active” axial positioning by the gravity of ballast unit and mechanical locking device proposed by the nuclear fuel assembly research group of China initiative Accelerator Driven System project at Institute of Modern Physics has been emphatically introduced. It is expected that this paper can provide certain supporting data and reference solutions for the further design and development of fuel assembly for lead‐based reactor.

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Section: Fa Design Of Lfrsmentioning

confidence: 99%

Review of fuel assembly design in lead‐based fast reactors and research progress in fuel assembly of China initiative accelerator driven system

Sheng

et al. 2021

Int J Energy Res

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“…The k-epsilon model and the k-omega model are RANS models, which can provide higher calculation efficiency, but less accuracy in some cases [ 25 ]. The SST model was reported to be able to provide high accuracy for a low-Reynolds flow [ 26 ]. The LES model could predict the fluid more accurately than RANS, but with a higher requirement for calculation resources [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Accelerator-Driven System Fuel Assembly during the Steam Generator Tube Rupture Accident

et al. 2021

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China is developing an ADS (Accelerator-Driven System) research device named the China initiative accelerator-driven system (CiADS). When performing a safety analysis of this new proposed design, the core behavior during the steam generator tube rupture (SGTR) accident has to be investigated. The purpose of our research in this paper is to investigate the impact from different heating conditions and inlet steam contents on steam bubble and coolant temperature distributions in ADS fuel assemblies during a postulated SGTR accident by performing necessary computational fluid dynamics (CFD) simulations. In this research, the open source CFD calculation software OpenFOAM, together with the two-phase VOF (Volume of Fluid) model were used to simulate the steam bubble behavior in heavy liquid metal flow. The model was validated with experimental results published in the open literature. Based on our simulation results, it can be noticed that steam bubbles will accumulate at the periphery region of fuel assemblies, and the maximum temperature in fuel assembly will not overwhelm its working limit during the postulated SGTR accident when the steam content at assembly inlet is less than 15%.

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“…Due to compact footprint and higher heat transfer performance, helical coiled-tube heat exchanger demand has been drastically increased in the last few decades. Coiled-tube heat exchangers play a key role in heat and mass transfer operations in industrial applications, such as food and chemical process, power generation, heat recovery and refrigeration system, and petroleum, electronics, and nuclear industries, etc. − The interesting feature of fluid flow in a helical coiled tube is that it can generate secondary flows by centrifugal forces without having any moving parts, which leads to enhancement of heat transfer coefficients. − In helical coiled tubes, the fluid in the core moves toward the outer wall and then returns to the core due to secondary flow; that generates additional convective current and enhances the heat transfer performance. ,,− …”

Section: Introductionmentioning

confidence: 99%

“…The heat transfer study in a TTHC heat exchanger is carried out considering both co-and counter-current flow configurations. In addition to flow configuration, two different geometrical cases of annular section were also considered: (1) with and (2) without baffles. The fluid flow and heat transfer study in the TTHC heat exchanger is carried out over a wide range of Dean numbers considering the laminar flow regime.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Fluid Flow Characteristics for Newtonian and Non-Newtonian Fluids in a Tube-in-Tube Helical Coil Heat Exchanger

Kushwaha

Kumawat

Nigam

et al. 2020

Ind. Eng. Chem. Res.

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In the present work, heat transfer and fluid flow characteristics for both Newtonian and non-Newtonian fluids in tube-in-tube helical coil (TTHC) heat exchangers have been investigated numerically. The various TTHC heat exchanger configurations studied are (1) parallel and (2) counter flow, with and without baffles. The power law index (n) and Dean number (N De ) are varied from 0.5 to 1.25 and 50 to 500, respectively. Further, two different models have been proposed to predict the friction factor (f) and Nusselt number (Nu) in TTHC. It is observed that f and Nu in the TTHC heat exchanger with baffles in the annulus is higher as compared to without baffles. Furthermore, at low Prandtl number the baffles have significant influence on heat transfer, while at high Prandtl number flow configuration has high significance.

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Enhanced heat transfer and reduced pressure loss with U-pattern of helical wire spacer arrangement for liquid metal cooled-fast reactor fuel assembly

Cited by 14 publications

References 21 publications

Review of fuel assembly design in lead‐based fast reactors and research progress in fuel assembly of China initiative accelerator driven system

Review of fuel assembly design in lead‐based fast reactors and research progress in fuel assembly of China initiative accelerator driven system

Analysis of the Accelerator-Driven System Fuel Assembly during the Steam Generator Tube Rupture Accident

Heat Transfer and Fluid Flow Characteristics for Newtonian and Non-Newtonian Fluids in a Tube-in-Tube Helical Coil Heat Exchanger

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