Seal Performance of Metal Cask Under Drop Accident

Although there have been many tests and analyses reported for the evaluation of drop tests of metal casks, no quantitative measurement has ever been made for any instantaneous leakage through metal gaskets during the drop tests due to loosening of the bolts in the containments and lateral sliding of the lids. In this study, leak tests were performed using a full-scale cask without impact limiters simulating drop accidents in a storage facility, with the aim of measuring and evaluating any instantaneous leakage at the impact. Instantaneous leak rates were quantitatively measured at the drop tests. The amount of leakage was insignificant. The relationship between the maximum sliding displacement of the lid and the leak rate was obtained.