Seismic response and failure analyses of a mixed-oxide fuel fabrication plant

The structural integrity and possible failure modes of mixed-oxide fuel fabrication plants (MOFFP) subjected to different ground-motion intensities ranging from 0.1- to 1.0-g peak accelerations was studied. To perform this study, calculation models of safety-related systems to be used in the analysis were developed. Both elastic and inelastic dynamic response analyses for both horizontal and vertical ground motion were performed. Conclusions drawn regarding the structural integrity for the model MOFFP are as follows: (1) no structural damage at ground motions <0.4 g; (2) severe structural damage at 0.4 to 0.5 g; (3) complete building collapse at >0.5 g; and (4) building collapse before equipment failure. (U.S.)