Flow and heat transfer characteristics in plate-type fuel channels after formation of blisters on fuel elements

Li, Linfeng; Fang, Di; Zhang, Dalin; Chen, Yongzheng; Tian, Wenxi; Su, G.H.; Qiu, Suizheng

doi:10.1016/j.anucene.2019.06.030

Cited by 34 publications

(3 citation statements)

References 18 publications

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“…The boundary conditions are shown in Table 1. In present work, the solid region (pellet and cladding) and the gas cavity formed by fission gas are not considered, and the boundary conditions of solid wall are set according to literature (Li et al, 2019). The velocity inlet was used in this work, the water with high subcooling enters the channel and the volume fraction of the vapor is 0, the velocity of the liquid was 1.5 m/s.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…The increased gas pressure would cause blistering deformation of the cladding. Li et al (Li et al, 2019) studied the heat transfer characteristics in single and parallel channels after formation of blisters, the result show that high temperature areas and large temperature gradients will appear, the distribution of heat flux on the surface is not uniform. Under the influence of the blister, vapor will gather at some stagnation areas, which would result in local high void fraction.…”

Section: Introductionmentioning

confidence: 99%

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Study on Flow Boiling Characteristics in Rectangle Channel After Formation of Blisters

et al. 2021

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Plate-type fuel elements is one of the first fuel structure choice for the novel integrated PWR, however, blisters will appear on the cladding induced by irradiation and fission. In this work CFD method was used to investigate the subcooled boiling characteristic of the water in rectangle channel with round and pillow blisters, the modified RPI model was also proposed, we can draw conclusions as follows: In the channel with round blister, as the blisters will increase the local flow resistance and more fluid will flow through center of the channel. Boiling occurred only in the area near the edges, nearly no vapor appeared at the center of the channel. The boiling region in channel with pillow shape blisters is wider and concentrated between two pillow blisters and downstream of the non-blisters side. The dry out area are both in the downstream region of blisters for the two types of channels.

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Section: Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Flow Boiling Characteristics in Rectangle Channel After Formation of Blisters

et al. 2021

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“…For the plate type fuel reactor, under certain accident conditions such as debris flowing into reactor and fuel blistering, the flow channel blockage will happen, causing temperature to increase sharply inside the fuel plate and leading to large temperature gradient along the plate, which may induce structure rupture of plates and cause severe consequences [18]. e fuel assembly operation features under the blockage conditions are analyzed with the coupling code in this section.…”

Section: Blockage Condition Analysismentioning

confidence: 99%

Thermal Hydraulic and Neutronics Coupling Analysis for Plate Type Fuel in Nuclear Reactor Core

Wang

et al. 2020

Science and Technology of Nuclear Installations

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The thermal hydraulic and neutronics coupling analysis is an important part of the high-fidelity simulation for nuclear reactor core. In this paper, a thermal hydraulic and neutronics coupling method was proposed for the plate type fuel reactor core based on the Fluent and Monte Carlo code. The coupling interface module was developed using the User Defined Function (UDF) in Fluent. The three-dimensional thermal hydraulic model and reactor core physics model were established using Fluent and Monte Carlo code for a typical plate type fuel assembly, respectively. Then, the thermal hydraulic and neutronics coupling analysis was performed using the developed coupling code. The simulation results with coupling and noncoupling analysis methods were compared to demonstrate the feasibility of coupling code, and it shows that the accuracy of the proposed coupling method is higher than that of the traditional method. Finally, the fuel assembly blockage accident was studied based on the coupling code. Under the inlet 30% blocked conditions, the maximum coolant temperature would increase around 20°C, while the maximum fuel temperature rises about 30°C. The developed coupling method provides an effective way for the plate type fuel reactor core high-fidelity analysis.

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Time-resolved PIV measurement of coherent structures downstream of step blockage in a narrow rectangular channel

Liu

Yao

et al. 2023

Annals of Nuclear Energy

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Flow and heat transfer characteristics in plate-type fuel channels after formation of blisters on fuel elements

Cited by 34 publications

References 18 publications

Study on Flow Boiling Characteristics in Rectangle Channel After Formation of Blisters

Study on Flow Boiling Characteristics in Rectangle Channel After Formation of Blisters

Thermal Hydraulic and Neutronics Coupling Analysis for Plate Type Fuel in Nuclear Reactor Core

Time-resolved PIV measurement of coherent structures downstream of step blockage in a narrow rectangular channel

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