NDLI: Ultrasonic method for nuclear fuel rods pressure and gas composition released measurement

Content Provider	IEEE Xplore Digital Library
Author	Rosenkrantz, E. Ferrandis, J.Y. Lévèque, G. Baron, D. Thevenin, P.
Copyright Year	2009
Description	Author affiliation: South Electronic Institute, a research laboratory of the Montpellier II University and the French National Research Center, 34095, France (Rosenkrantz, E.; Ferrandis, J.Y.; Lévèque, G.) \|\| Electrité de France R&D, Les Renardières, Route de Sens, 77818 MORET sur LOING Cedex (France) (Baron, D.; Thevenin, P.)
Abstract	The objective of this work was to develop a non-destructive acoustic method giving an easy access to two important pieces of information in the irradiated fuel rods: the pressure and the composition of the internal gas mixture in the upper plenum of a standard LWR fuel rod. A first attempt started in 1993 made possible the development of a focused sensor, able to inject acoustic power from a piezoelectric transducer, through the fuel rod cladding and excite the internal gas mixture. This step was achieved in 1999 and covered by a first patent [1]. However, the initial problem was not totally solved because of the presence of the upper spring in the LWR fuel rod. This spring mainly induced a large decrease in the acoustic amplitude response and this solution was not applicable. The method has been revised recently for several aspects: the design of the sensor to optimize the acousmtic power injection through the cladding rod, and the entire experimental protocol, including the signal processing in the time and frequency spaces. A single λ/2 layer (instead of the standard solution in λ/4) of low impedance material (compared to the transducer and tube wall impedance) as water, was found to be a better matching layer.
Starting Page	1
Ending Page	5
File Size	326497
Page Count	5
File Format	PDF
ISBN	9781424452071
DOI	10.1109/ANIMMA.2009.5503773
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-07
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic devices Nuclear fuels Ultrasonic variables measurement Acoustic sensors Acoustic measurements Nuclear fuel Pressure measurement Impedance Standards development Springs Nuclear measurements Gas detectors
Content Type	Text
Resource Type	Article

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