Improved methodology for postulated fuel handling accident

Abstract: This report presents a suggestion of an improved method for evaluation of a fuel handling accidents. Using a 3D FE-model and ANSYS LS-DYNA EXT the structural analysis is carried out. Importing geometry from SpaceClaim and simplifying it creates the geometry used in this analysis. By modifying the weight of the parts to resemble the real world product and coupling it with Ramberg-Osgood used as the material model the computational model will be similar to the real assemblies. Four different load cases are suggested to be examined. Together they analyse the effect of tilt angle and distribution of energy across multiple assemblies. The results show that higher strain might occur in the top of the impacted assembly than previously thought. It also shows tendencies for the falling assembly to glance of the impacted assembly and continue until it affects another assembly. Several improvements on this model can be done. The implementation of birth and death and combining the split assemblies into one singe calculation.