Logo image
Back
Vibrometric characterization of an intact and unloaded scaled model TN-32 dry storage cask for spent nuclear fuel
Conference proceeding   Peer reviewed

Vibrometric characterization of an intact and unloaded scaled model TN-32 dry storage cask for spent nuclear fuel

Kevin Yi-Wei Lin, Wayne Prather, Zhiqu Lu, Joel Mobley, Gautam Priyadarshan and Joseph Rhea Gladden
Proceedings of Meetings on Acoustics, Vol.31, 065004
Meeting of the Acoustical Society of America, 174th (New Orleans, Louisiana, USA, 12/04/2017–12/08/2017)
12/04/2017
DOI: https://doi.org/10.1121/2.0000754

Metrics

1 Record Views

Abstract

The assessment of the internal structural integrity of dry storage casks for used high burnup nuclear fuel assemblies is of critical importance before these are transported to permanent repositories. The size of the casks (5.2 m in height and 2.4 m in diameter), structural complexity and the inability to access the interior make this a challenging task. This project addresses these difficulties through a multi-modal approach involving nuclear, charged particle and acoustic methods. This paper reports on measurements of the vibrational spectra and mode shapes using a 6:1 scaled TN-32 model cask constructed in house. 2-D vibrometric scans were performed with a laser Doppler vibrometer to measure the vibrational mode shapes exhibited by the intact cask. Good agreement is observed between the experimentally measured mode shapes on both full-scale and scaled cask and those determined numerically using a detailed finite element model. Several modes identified will be important in assessing the internal characteristics from external measurements. Furthermore, compared to linear techniques, nonlinear responses acquired suggest higher sensitivity to changes in internal structure.

Details

Logo image