Validation of deformation and vibration measurement techniques for nuclear fuel pins. De Pauw, B., Vanlanduit, S., Berghmans, F., Van Tichelen, K., & Geernaert, T. ICEM15: 15th international conference on experimental mechanics, 46(9 LB - DePauw20133647):UNSP 2828, http://www.sciencedirect.com/science/article/pii/S026322411300300X, 2012.
Validation of deformation and vibration measurement techniques for nuclear fuel pins [link]Paper  abstract   bibtex   
The Belgian Nuclear Research Centre SCK.CEN plans to construct a new reactor type (named MYRRHA). This reactor will be able to sustain nuclear fission reactions driven by a proton accelerator and a liquid eutectic mixture of lead and bismuth as spallation source and as coolant. The flow of the coolant will produce vibrations in the reactor core containing the fuel assembly that consists of a matrix of fuel pins. Information about these vibrations is critical to determine the lifetime of the fuel and of the reactor core. In this paper we report on the performance evaluation of different vibration sensors considered for measuring the flow induced vibrations on a fuel pin mockup. The sensors include a scanning laser Doppler vibrometer (SDLV), grid method (GRID), fibre Bragg grating sensors (FBGs), resistive strain gages and two types of accelerometers. We first show that the SDLV outperforms the other sensor types. However this system requires optical access to the fuel pin, which will be impossible in practice as the lead-bismuth mixture is not transparent. The MEMS-type accelerometer and fibre Bragg gratings become the sensors of choice when considering the need to measure low amplitude and low frequency vibrations. Considering the limited space available in the fuel assembly we finally show that the fibre Bragg grating is the sensor of choice with a high quality factor up to 99.5%.
@article{DePauw2012,
abstract = {The Belgian Nuclear Research Centre SCK.CEN plans to construct a new reactor type (named MYRRHA). This reactor will be able to sustain nuclear fission reactions driven by a proton accelerator and a liquid eutectic mixture of lead and bismuth as spallation source and as coolant. The flow of the coolant will produce vibrations in the reactor core containing the fuel assembly that consists of a matrix of fuel pins. Information about these vibrations is critical to determine the lifetime of the fuel and of the reactor core. In this paper we report on the performance evaluation of different vibration sensors considered for measuring the flow induced vibrations on a fuel pin mockup. The sensors include a scanning laser Doppler vibrometer (SDLV), grid method (GRID), fibre Bragg grating sensors (FBGs), resistive strain gages and two types of accelerometers. We first show that the SDLV outperforms the other sensor types. However this system requires optical access to the fuel pin, which will be impossible in practice as the lead-bismuth mixture is not transparent. The MEMS-type accelerometer and fibre Bragg gratings become the sensors of choice when considering the need to measure low amplitude and low frequency vibrations. Considering the limited space available in the fuel assembly we finally show that the fibre Bragg grating is the sensor of choice with a high quality factor up to 99.5{\%}.},
address = {http://www.sciencedirect.com/science/article/pii/S026322411300300X},
author = {{De Pauw}, B. and Vanlanduit, S. and Berghmans, F. and {Van Tichelen}, K. and Geernaert, T.},
issn = {0263-2241},
journal = {ICEM15: 15th international conference on experimental mechanics},
keywords = {Published},
mendeley-tags = {Published},
number = {9 LB  - DePauw20133647},
pages = {UNSP 2828},
title = {{Validation of deformation and vibration measurement techniques for nuclear fuel pins}},
url = {http://dx.doi.org/10.1016/j.measurement.2013.07.003},
volume = {46},
year = {2012}
}

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