Analysis of flow distribution a PWR fuel rod bundle model containng A 90% blockage

Ang, M.L.; Aytekin, Ayşe; Fox, A.H.

doi:10.1016/0029-5493(87)90271-8

Cited by 7 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The velocity profiles encountered are similar to analogous studies of [7], however, with the use of CFD, flow properties could be better observed as pointed by [3]- [5].…”

Section: Discussionsupporting

confidence: 74%

“…Nevertheless, the briefly simulation with 5x5 fuel rods could indicate mass flow pass around the ballooned region, creating a stagnation zone, indication an overheated region [21], [3], [8] and [22].…”

Section: Discussionmentioning

confidence: 99%

“…For the second paper, [4] verified the influence of a 62% coplanar radial blockage, with a blockage length smaller than used in [3]. The results showed an average increasing of 25% in velocity when compared to the average velocity in non-blocked channels.…”

Section: Introductionmentioning

confidence: 92%

“…Thus, an experimental fluid-dynamic study, divided into three papers was accomplished to evaluate the influence of partially blocked channels for a 7x7 fuel assembly. For the first paper, [3] used a 4x4 blocked region with a quarter of total length as blocked length. Characterizing a large break loss of coolant accident (LBLOCA), the study showed large drops in velocity inside some blocked regions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A CFD analysis of blockage length on a partially blocked fuel rod

et al. 2019

View full text Add to dashboard Cite

After a loss of coolant accident (LOCA), fuel rods may balloon. The swelling can partially block the flow channel, affecting the coolability during reflood phase. In order to analyze the influence of blockage length, using a radial blockage of 90%, varying just the blockage length, many steady state numerical simulations has been done using Ansys-CFX code to verify thermal-hydraulic properties according to different forced cooled conditions. Temperature peaks are observed on cladding, followed by a temperature drop. A 5x5 fuel assembly, with 9 centered ballooned fuel rod, flow redistribution inside channels can also be captured, indicating an overheating zone. Therefore, this study conclude, for the same boundary conditions, the longer the blockage length originated after LOCA events, the higher are the clad temperatures, indicating the possibility of overheat during transient conditions on reflood.

show abstract

“…The velocity profiles encountered are similar to analogous studies of [7], however, with the use of CFD, flow properties could be better observed as pointed by [3]- [5].…”

Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%