Results 201 to 210 of about 754,336 (235)
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Effect of spacer grids on CHF in nuclear rod bundles
Nuclear Engineering and Design, 2013Abstract In nuclear reactor fuel assemblies, spacer grids are used in the rod bundles to provide mechanical support to the rods and to reduce flow-induced vibration. These are known to play a role in the local heat transfer as well as in the onset of the critical heat flux (CHF) condition.
S. Jayanti, K. Rajesh Reddy
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Reduced-resolution RANS approach to grid spacer fuel assemblies
Nuclear Engineering and Design, 2020Abstract One of the main issues in the context of the safety assessment of liquid metal-cooled reactors is flow blockages in fuel sub-assemblies. CFD modelling may be used to predict the temperature and velocity fields inside a fuel assembly under blocked and unblocked conditions.
Akshat Mathur +2 more
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Effect of a Dimple Location in a Spacer Grid on the Impact Strength
Volume 4: Structural Integrity; Next Generation Systems; Safety and Security; Low Level Waste Management and Decommissioning; Near Term Deployment: Plant Designs, Licensing, Construction, Workforce and Public Acceptance, 2008A spacer grid is one of the most important structural components in a PWR fuel assembly. The spacer grid, which supports nuclear fuel rods laterally and vertically with a friction grip, is an interconnected array of slotted grid straps welded at the intersections to form an egg-crate structure.
Kee-Nam Song, Soo-Bum Lee
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The Research on Scale of Cluster Fuel Assembly Spacer Grids
18th International Conference on Nuclear Engineering: Volume 2, 2010The existence of boundary walls will impact flow and heat transfer to some extent. The boundary walls decrease the lateral velocities and change the flow direction to form some eddies, so the flow instability increases. Besides, they stop the mass transfer between the inner areas and outside.
Jie Chen, Bingde Chen, Hong Zhang
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Application of the Improved Spacer Grid Model in Subchannel Analysis Code
Nuclear Technology, 2018AbstractIn most subchannel analysis codes, spacer grids are simulated using an effective loss coefficient that can account only for the spacer grid’s mean axial effect on the pressure drop. Since the mixing vane spacer grid (MVG) in a rod bundle has great influence on local flow fields, neglecting the effect of mixing vanes will degrade fidelity and ...
Siying Dong +3 more
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POST CHF EFFECTS OF SPACER GRIDS AND
Multiphase Science and Technology, 1993L. E. Hochreiter +4 more
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METHODOLOGY OF SPACER GRIDS RESISTANCE CALCULATION
Proceeding of Advances in Heat Transfer Engineering, 2023openaire +1 more source
Critical thermal load in bunches with spacer grids
Soviet Atomic Energy, 1965A. S. Kon'kov, Yu. D. Barulin
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Transient Critical Heat Flux and Spacer Grid Studies
Nuclear Technology, 1974L. A. Zielke, R. H. Wilson
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