Year
2019
File Attachment
a1374_1.pdf1.38 MB
Abstract
In accident scenarios of transport packages or hypothetical crashes of storage containers in a repository, the materials resistance against dynamic failure of the involved components is a deciding factor for package and container integrity during the handling, transport and storage for each type of radioactive material. For example, different dynamic impact tests on containers and components like lid sealing systems and specimens like ductile cast iron and shock-absorbing materials are carried out at BAM. In order to perform dynamic impact tests with packages and parts of it BAM operates two free-fall drop test facilities with maximum capacities of 200 t and 55 t, respectively and a test bench for guided drop tests. This latter drop test machine enables a clearly specified component loading by a precisely positioned test object or drop weight and has been used recently for numerous investigations. The article gives an overview of the wide range of experimental testing methods carried out within guided impact and bending tests. Examples of methodological challenges are presented, especially such experimental analysis of dynamic impact conditions. In addition to known applied methods of dynamic, non-contact displacement measurements like high-speed 3-D surface deformation a recently patented 2-D tracking method is presented. By means of in-situ determination of fracture parameters with relevance to the materials stress intensity factor, the method has been successfully applied for a typical specimen geometry. Also shown are the possibility of detecting in-situ He-leakage rates on laterally impact loaded lid sealing systems as well as a method of acceleration sensor-temperature control under test conditions in the low temperature range and some other gadgets during impact testing.