SEISMIC RESPONSE ANALYSIS OF A FREESTANDING MODEL OFSPENT FUEL STORAGE CASK

摘要

The seismic response analyses of a freestanding spent fuel storage cask are performed for an artificial timehistory acceleration generated on the basis of the US NRC RG1.60 response acceleration spectrum. This paperfocuses on the structural stability regarding seismic loads to check the overturning possibility of a storage cask andthe slip displacement on the concrete installation bed. A simple structural analysis model for the storage cask isdeveloped to perform the parametric effect analyses regarding the seismic responses. Two parameters consideredin the analyses are the magnitude of the seismic load and the interface friction between the cask's bottom surfaceand the upper surface of the concrete installation bed. The analyses results show that the seismic responses of thestorage cask are influenced by a combination of the two parameters and the storage cask also has a large marginalintegrity for the maximum overturning angle and the slip distance for the design and beyond design seismic loads.