Status of the ASME Guidance Document on Computational Modeling for Explicit Dynamics

Modern explicit dynamics finite element computer codes used for the design and evaluation of spent fuel transportation packages and storage casks are sufficiently sophisticated and robust that they are able to produce accurate results for complex impact events (i.e., energylimitedevents) that include spent fuel cask drops and aircraft impact. However, based on the authors' experience, there is considerable variability among users when implementing these computer codes. Compounding this is the fact that there is no clear guidance explaining the computational modeling requirements necessary to achieve accurate results.To address this issue ASME and the NRC formed the Special Working Group (SWG) on Computational Modeling for Explicit Dynamics in 2008 for the sole purpose of developing a guidance document on computational modeling for explicit dynamics, which can be used to guide users in the construction of quality (accurate) finite element models. Members of theSWG include many internationally recognized experts in the use, implementation and benchmarking of explicit dynamics codes.