No abstract

No abstract

No abstract

A methodology is presented for evaluating the structural integrity of metallic nuclear waste disposal containers (waste packages) subject to impact events. The LS-DYNA finite element analysis (FEA) computer code and massively parallel processing (MPP) is used for nonlinear, dynamic-plastic, large-distortion impact simulations. The acceptance criterion is based on minimum-strength, bilinear, stress-strain curves and the ASME Boiler and Pressure Vessel Code primary stress intensity limits. The evaluation uses component stress classifications based on force-moment response trends from a series of reduced-modulus elastic analyses. FEA examples are provided for a waste package that is supported on an emplacement pallet (pallet) and dropped from the transfer vehicle.

A methodology is presented for estimating the ultimate structural capability (fragility) of metallic nuclear waste disposal containers (waste packages) subject to impact events. The LS-DYNA finite element analysis (FEA) computer code and massively parallel processing (MPP) is used for nonlinear, dynamic-plastic, large-distortion impact simulations. The fragility estimate for risk assessments uses strain energy concepts, a ductile-rupture damage criterion and tri-linear stress-strain curves adjusted for material cold-forming triaxiality and weldment toughness scatter. FEA examples are provided for waste package impacts on ground support structures.