Results 11 to 20 of about 233,779 (288)

Refinement of Finite Element Method Analysis Model of Pressurized Water Reactor Nuclear Fuel Spacer Grid Based on Experimental Data

Energies
A Finite Element Method (FEM) analysis of the nuclear fuel spacer grid was conducted to assess the strength of components for the safety of nuclear power plants.
Minhee Kim, Ihn Namgung
doaj   +2 more sources

An Investigation of the Stiffness Characteristics of a PWR Nuclear Fuel Spacer Grid by a 3D Shell Model

Energies
The structural integrity of fuel assemblies hinges significantly on the effectiveness of spacer grids. In this paper, we introduce a novel approach to assess the structural robustness of the mid-spacer grid (SG) of the PLUS7 fuel assembly (FA) using 3D ...
Minhee Kim, Ihn Namgung
doaj   +2 more sources

Large eddy simulation of a turbulent flow in a 5 x 5 rod bundle with a mixing vane spacer grid [PDF]

Frontiers in Energy Research
In fuel assemblies of pressurized water reactors (PWRs), mixing-vane spacer grids are extensively employed to array fuel rods and enhance inter- and intra-subchannel mixing.
Chuan Lu, Zhaohui Du
doaj   +2 more sources

Experimental study of local coolant hydrodynamics in TVS-Kvadrat PWR reactor fuel assembly using mixing spacer grids with different types of deflectors

Nuclear Energy and Technology, 2015
Results of experimental studies of local hydrodynamic characteristics of coolant flow in fuel assemblies of RWR reactors using different types of mixing spacer grids are presented. Specific features and regularities of coolant flow in fuel pin bundles of
S.M. Dmitriev, S.S. Borodin, A.V. Varentsov, M.A. Legchanov, V.D. Sorokin, A.E. Khrobostov   +5 more
doaj   +2 more sources

CFD simulation of flow and heat transfer characteristics in a 5×5 fuel rod bundles with spacer grids of advanced PWR

Nuclear Engineering and Technology, 2020
High fidelity nuclear reactor fuel assembly simulation using CFD method is an effective way for the structure design and optimization. The validated models and user practice guidelines play critical roles in achieving reliable results in CFD simulations.
Yingjie Wang, Mingjun Wang, Haoran Ju, Minfu Zhao, Dalin Zhang, Wenxi Tian, Tiancai Liu, Suizheng Qiu, G.H. Su   +8 more
doaj   +2 more sources

Prediction of critical heat flux in a rod bundle channel with spacer grids based on the Eulerian two-fluid model [PDF]

Frontiers in Energy Research
The critical heat flux (CHF) is a vital parameter influencing the safety and efficiency of reactor cores. In this study, the Eulerian two-fluid model coupled with the extended wall boiling model in STAR-CCM+ was employed to simulate the departure from ...
Li Kejia, Zheng Xiong, Meng Shuqi, Jin Desheng, Mao Yulong, Hu Yisong, Zhou Youxin, Chen Jun   +7 more
doaj   +2 more sources

Modal properties of the flexural vibrating package of rods linked by spacer grids [PDF]

Applied and Computational Mechanics, 2011
The paper deals with the modelling and modal analysis of the large package of identical parallel rods linked by transverse springs (spacer grids) placed on several level spacings.
Zeman V., Hlaváč Z.
doaj   +2 more sources

5X5 Rod Bundle Flow Field Measurements Downstream a PWR Spacer Grid

Brazilian Journal of Radiation Sciences, 2020
The spacer grids are structures present in nuclear fuel assembly of Pressurized Water Reactors (PWR). They play an important structural role and also assist in heat removal through the assembly by promoting increased turbulence of the flow. Understanding
Higor Fabiano Pereira de Castro, Vitor Vasconcelos Araújo Silva, Andre Augusto Campagnole dos Santos, Maria Auxiliadora Fortini Veloso   +3 more
doaj   +1 more source

Analysis of Computer Modelling Results on Fuel Rods Strength and Condition at Reduced or Absent Cooling Caused by Accident

Energy Engineering and Control Systems, 2021
The paper describes the phenomenology of fuel rod behaviour in severe accident. As an example, an experiment is described resulting in severe damage of 19 fuel rod assembly of VVER type; it was carried out in the CORA facility in 1993 (Research Centre ...
Stepan Lys
doaj   +1 more source

Modeling and Simulation Analysis on Mixing Characteristics of Two-Phase Flow Around Spacer Grid

Frontiers in Energy Research, 2022
The spacer grid has a significant impact on the thermal-hydraulic characteristics of the rod bundle channel, which directly determines the possibility of a boiling crisis.
Y. Xiao, T. C. Duan, Quan-Yao Ren, Xiao-Yu Zheng, Meiyin Zheng, Rui He   +5 more
doaj   +1 more source