In this paper, dynamic tests of a fuel assembly subjected to an axial flow are presented. Tests are performed for various flow conditions, at several displacement amplitudes. The first four modes of the fuel assembly are excited, two confinements are tested. A parameters identification method based on a proper orthogonal decomposition (POD) analysis is proposed. Mass, damping, and stiffness parameters are presented for different displacement amplitudes and flow rates. An added mass effect in still water is observed, and the damping increases linearly with the flow rate. A nonlinear behavior of the fuel assembly is observed. An added stiffness effect increasing with the flow rate is observed, and the mass seems to depend on the flow rate. The by-pass seems to be responsible for these observations.
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e-mail: guillaume.ricciardi@cea.fr
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December 2014
Research-Article
Mass, Stiffness, and Damping Identification for a Pressurized Water Reactors Fuel Assembly by a Proper Orthogonal Decomposition Method
G. Ricciardi,
e-mail: guillaume.ricciardi@cea.fr
G. Ricciardi
1
CEA Cadarache DEN/DTN/STRI/LHC
,Saint Paul-Lez-Durance Cedex 13108
, France
e-mail: guillaume.ricciardi@cea.fr
1Corresponding author.
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E. Boccaccio
E. Boccaccio
CEA Cadarache DEN/DTN/STRI/LHC
,Saint Paul-Lez-Durance Cedex 13108
, France
Search for other works by this author on:
G. Ricciardi
CEA Cadarache DEN/DTN/STRI/LHC
,Saint Paul-Lez-Durance Cedex 13108
, France
e-mail: guillaume.ricciardi@cea.fr
E. Boccaccio
CEA Cadarache DEN/DTN/STRI/LHC
,Saint Paul-Lez-Durance Cedex 13108
, France
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received July 4, 2013; final manuscript received September 9, 2014; published online October 14, 2014. Assoc. Editor: Chong-Shien Tsai.
J. Pressure Vessel Technol. Dec 2014, 136(6): 061303 (9 pages)
Published Online: October 14, 2014
Article history
Received:
July 4, 2013
Revision Received:
September 9, 2014
Citation
Ricciardi, G., and Boccaccio, E. (October 14, 2014). "Mass, Stiffness, and Damping Identification for a Pressurized Water Reactors Fuel Assembly by a Proper Orthogonal Decomposition Method." ASME. J. Pressure Vessel Technol. December 2014; 136(6): 061303. https://doi.org/10.1115/1.4028559
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