Thermal hydraulic characteristics of spiral cross rod bundles in a lead–bismuth-cooled fast reactor

2021 ◽  
pp. 108850
Author(s):  
Yue Zeng ◽  
Pingjian Ming ◽  
Fengchen Li ◽  
Hongna Zhang
Keyword(s):  
Fast Reactor ◽  
Hydraulic Characteristics ◽  
Rod Bundles

Turbulent Flow Through Spacer Grids in Rod Bundles

1998 ◽  
Vol 120 (4) ◽  
pp. 786-791 ◽  
Author(s):  
Sun Kyu Yang ◽  
Moon Ki Chung
Keyword(s):  
Turbulent Flow ◽  
Laser Doppler Velocimetry ◽  
Hydraulic Characteristics ◽  
Rod Bundles ◽  
Spacer Grid ◽  
Spacer Grids ◽  
Rod Bundle ◽  
Turbulence Decay ◽  
Skewness Factor ◽  
Flow Through

The effects of the spacer grids with mixing vanes in rod bundles on the turbulent structure were investigated experimentally. The detailed hydraulic characteristics in subchannels of a 5 × 5 rod bundle with mixing spacer grids were measured upstream and downstream of the spacer grid by using a one component LDV (Laser Doppler Velocimetry). Axial velocity and turbulent intensity, skewness factor, and flatness factor were measured. The turbulence decay behind spacer grids was obtained from measured data. The trend of turbulence decay behaves in a similar way as turbulent flow through mesh grids or screens. Pressure drop measurements were also performed to evaluate the loss coefficient for the spacer grid and the friction factor for a rod bundle.

CFD Investigating the Effects of Different Mixing Vane Designs on the Localized Thermal-Hydraulic Characteristics in the Rod Bundles With Grid Spacer

2011 ◽  
Author(s):  
C. C. Liu ◽  
Y. M. Ferng ◽  
C. K. Shih ◽  
B. S. Pei
Keyword(s):  
Heat Transfer ◽  
Weld Nugget ◽  
Hydraulic Characteristics ◽  
Cfd Model ◽  
Rod Bundles ◽  
Processing Power ◽  
Flow Mixing ◽  
Hydraulic Design ◽  
Nusselt Number Distribution ◽  
Swirl Vane

A safe and reliable operation of a reactor system relies on the accurate thermal-hydraulic design in the rod bundles. With the dramatic progress in the computer processing power, computational fluid dynamics (CFD) methodology can be applied in investigating these thermal-hydraulic characteristics in details. The flow mixing devices on a grid spacer are generally designed to enhance the turbulence and heat transfer in the sub-channels. Therefore, the majority of this paper is to investigate the effects of different mixing vane configurations on flow pattern and heat transfer in the downstream of the mixing vanes in the rod bundles through CFD methodology. This CFD model is first assessed by the previous experiment of Holloway et al. In this study, six different designs of split-vane pairs are simulated, including (a) the split-vane 1 pairs (b) the split-vane 1 pairs without weld-nugget (c) the split-vane 2 pairs without weld-nugget (d) the Hybrid vane (e) the Swirl vane and (f) the SSVF vane. The thermal-hydraulic characteristics within the rod bundles with the split-vane pairs can be reasonably captured by the present CFD model, which includes the swirling secondary flow, turbulent mixing increase, and heat transfer enhancement, etc. Based on the comparison of Nusselt number distribution downstream the grid, the design of split-vane 1 pairs can enhance the heat transfer capability than other vane designs.

Modeling of Thermal Hydraulic Characteristics for a LBE-Cooled Fast Reactor Helical Coiled Type Steam Generator

2021 ◽  
Author(s):  
Xueyou DING ◽  
Qinglong Wen ◽  
Zhiqiang Chen ◽  
Shenhui Ruan ◽  
Cheng Cheng
Keyword(s):  
Steam Generator ◽  
Fast Reactor ◽  
Hydraulic Characteristics

Hydraulic characteristics of wire-wrapped rod bundles

1980 ◽  
Vol 62 (1-3) ◽  
pp. 271-293 ◽  
Author(s):  
A.A. Bishop ◽  
N. Todreas
Keyword(s):  
Hydraulic Characteristics ◽  
Rod Bundles

scholarly journals Experimental researches of thermal hydraulic characteristics in the model of sodium-air heat exchanger for fast reactor emergency cooling system

2014 ◽  
Vol 2014 (1) ◽  
pp. 149-159
Author(s):  
Aleksandr Pavlovich Sorokin ◽  
Evgeny Fyodorovich Ivanov ◽  
Galina Pavlovna Bogoslovskaya ◽  
Yurij Danilovich Levchenko ◽  
Vitalij Vladimirovich Privezentsev ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Fast Reactor ◽  
Cooling System ◽  
Hydraulic Characteristics ◽  
Experimental Researches

Current Status of the Development of the Fast Reactor Fuel Cycle in India

2009 ◽  
pp. 120-126
Author(s):  
K.V. Govindan Kutty ◽  
P.R. Vasudeva Rao ◽  
Baldev Raj
Keyword(s):  
Fast Reactor ◽  
Fuel Cycle ◽  
Reactor Fuel ◽  
Current Status ◽  
Fast Reactor Fuel
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