Shaking table experiments on 3/10 reduced-scale CAP1400 spent fuel storage rack considering the effect of fluid-structure interaction

2020 ◽  
Vol 369 ◽  
pp. 110861
Author(s):  
Yijun Huang ◽  
Daogang Lu ◽  
Yu Liu ◽  
Shu Zheng
Keyword(s):  
Fluid Structure Interaction ◽  
Shaking Table ◽  
Spent Fuel ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Spent Fuel Storage ◽  
Fuel Storage ◽  
Reduced Scale

scholarly journals The Sliding and Overturning Analysis of Spent Fuel Storage Rack Based on Dynamic Analysis Model

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Yu Liu ◽  
Daogang Lu ◽  
Yuanpeng Wang ◽  
Hongda Liu
Keyword(s):  
Impact Force ◽  
Fluid Structure Interaction ◽  
Seismic Loading ◽  
Spent Fuel ◽  
Analysis Model ◽  
Fem Model ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Fuel Storage ◽  
Interaction Experiment

Spent fuel rack is the key equipment for the storage of spent fuel after refueling. In order to investigate the performance of the spent fuel rack under the earthquake, the phenomena including sliding, collision, and overturning of the spent fuel rack were studied. An FEM model of spent fuel rack is built to simulate the transient response under seismic loading regarding fluid-structure interaction by ANSYS. Based on D’Alambert’s principle, the equilibriums of force and momentum were established to obtain the critical sliding and overturning accelerations. Then 5 characteristic transient loadings which were designed based on the critical sliding and overturning accelerations were applied to the rack FEM model. Finally, the transient displacement and impact force response of rack with different gap sizes and the supporting leg friction coefficients were analyzed. The result proves the FEM model is applicable for seismic response of spent fuel rack. This paper can guide the design of the future’s fluid-structure interaction experiment for spent fuel rack.

Mitigation of Sliding Motion of a Cask-Canister by Fluid-Structure Interaction in an Annular Region

2011 ◽  
Author(s):  
Tomohiro Ito ◽  
Yoshihiro Fujiwara ◽  
Atsuhiko Shintani ◽  
Chihiro Nakagawa ◽  
Kazuhisa Furuta
Keyword(s):  
Equations Of Motion ◽  
Fluid Structure Interaction ◽  
Shaking Table ◽  
Annular Region ◽  
Test Model ◽  
Free Standing ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Sliding Motion ◽  
Standing Structure

The cask-canister system is a coaxial circular cylindrical structure in which several spent fuels are installed. This system is a free-standing structure thus, it is very important to reduce sliding motion for very large seismic excitations. In this study, we propose a mitigation method for sliding motion. Water is installed in an annular region between a cask and a canister. The equations of motion are derived taking fluid-structure interaction into consideration for nonlinear sliding motion analyses. Based on these equations, mitigation effects of sliding motions are studied analytically. Furthermore, a fundamental test model of a cask-canister system is fabricated and shaking table tests are conducted. From the analytical and test results, sliding motion mitigation effects are investigated.

Experimental Study on Free Standing Rack Loading Full Fuel Assembly

2012 ◽  
Author(s):  
Akihisa Iwasaki ◽  
Yoshitsugu Nekomoto ◽  
Hideyuki Morita ◽  
Katsuhiko Taniguchi ◽  
Daisaku Okuno ◽  
...  
Keyword(s):  
Fuel Assembly ◽  
Evaluation Method ◽  
Full Scale ◽  
Shaking Table ◽  
Spent Fuel ◽  
Free Standing ◽  
Spent Fuel Storage ◽  
Fuel Storage ◽  
Spent Fuel Pool ◽  
Full Loading

The spent fuel storage rack of a nuclear plant stores the spent fuel temporarily before it can be moved to a reprocessing facility. Therefore, the spent fuel storage rack must have a high tolerance against large seismic loads. So, the free standing rack is developed in Japan as other countries. The free standing rack structure incorporates the effect of the friction force on the spent fuel pool floor, and the fluid effect. Under earthquake condition, the free standing rack sliding and rocking motions are induced and the spent fuels rattle in the cells. In this paper, sliding and rocking motions of full-scale rack model having full loading fuel assembly subjected to the seismic excitation are studied. To develop an analysis evaluation method for rack motions, we carried out seismic test of a full-scale rack model using a shaking table, and obtained the fundamental data about the free standing rack.

Fluid Structure Interaction Analysis of Liquid Tanks by the Coupled SPH - FEM Method with Experimental Verification

2019 ◽  
Vol 391 ◽  
pp. 152-173 ◽  
Author(s):  
Marina Sunara Kusić ◽  
Jure Radnić ◽  
Nikola Grgić ◽  
Alen Harapin
Keyword(s):  
Numerical Model ◽  
Interaction Analysis ◽  
Plastic Material ◽  
Fluid Structure Interaction ◽  
Experimental Tests ◽  
Experimental Results ◽  
Shaking Table ◽  
Fluid Structure ◽  
Partition Scheme ◽  
Structure Interaction

The paper presents the comparison of the results between the numerical model developed for the simulation of the fluid-structure interaction problem and the experimental tests. The model is based on the so called “partition scheme” in which the equations governing the fluid’s pressures and the equations governing the displacement of the structure are solved separately, with two distinct solvers. The SPH (Smoothed Particle Hydrodynamics) method is used for the fluid and the standard FEM (Finite Element Method), based on shell elements, is used for the structure. Then, the two solvers are coupled to obtain the coupled behaviour of the fluid structure system. The elasto plastic material model for the structure includes some important nonlinear effects like yielding in compression and tension. Previously experimentally tested (on a shaking table) rectangular tanks with rigid and deformable walls were used for the verification of the developed numerical model. A good agreement between the numerical and the experimental results clearly shows that the developed model is suitable and gives accurate results for such problems. The numerical model results are validated with the experimental results and can be a useful tool for analyzing the behaviour of liquid tanks of larger dimensions.

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