Explicit Transient Dynamic Finite Element Analyses Supporting the Certification of ENSA’s ENUN 24P Spent Nuclear Fuel Transportation Package

Equipos Nucleares, S.A. (ENSA) has contracted with Sandia National Laboratories (SNL) to design the impact limiters for the ENUN 24P pressurized water reactor (PWR) spent nuclear fuel transportation package. A new analysis methodology, based on a previously developed methodology utilized in the certification of the ENSA ENUN 32P package, was employed to assess the performance of the impact limiters for the ENUN 24P package. Benchmarking of the revised methodology was completed utilizing data from the 1/3 scale ENUN 32P drop tests performed at SNL in 2010. Using the new methodology, a total of 83 analyses were performed in support of the certification of the ENUN 24P package, demonstrating its compliance with applicable regulations.