Abstract
This paper presents an experimental investigation of effects of angular misalignment on flow-induced vibration of two simulated 43-element CANDU fuel bundles in an out-reactor fresh water loop. A total of 11 different alignment configurations are examined for a range of mass flow rates from 8.56kg/s to 27.36kg/s. The dynamic response of the simulated bundles is acquired using the MEMS-based accelerometers, non-contact type displacement sensor and a data acquisition system. The experimental data show that the bundle lateral vibration is sensitive to the bundle angular misalignment; there exist few misalignment configurations which exhibit significantly large bundle lateral vibration. This is an indication that the flow in the bundle-to-bundle interface region plays an important role in flow-induced vibration of CANDU fuel bundles.
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