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., energy-limited events) that include spent fuel cask drops and aircraft impact. However, based on NRC experience, there is considerable variability among users when implementing these computer codes. 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, which can be used to guide users in the construction of quality (accurate) finite element models. Members of the SWG include many internationally recognized experts in the use, implementation and benchmarking of explicit dynamics codes. The draft guidance document has been reviewed by several ASME Committees and experts from Structural Integrity Associates and Rolls Royce. The guidance document will be published in 2020 as an ASME Nuclear Bulletin.