41312 2017 eng lecture 0 -- -- -- In Germany, the concept of dry interim storage in dual purpose metal casks before disposal is being pursued for spent nuclear fuel (SNF) and high level waste (HLW) management. The main safety relevant components are the thick-walled dual purpose metal casks. These casks consist e.g. of a monolithic cask body with integrated neutron shielding components (polymers, e.g. polyethylene) and a monitored double lid barrier system equipped with metal and elastomer seals. The metal seals of this bolted closure system guarantee the required leak-tightness whereas the elastomer seals allow for leakage rate measurement of the metal seals. This presentation provides an overview of BAM proactive R&D projects related to the long-term behavior and degradation effects of metal seals, elastomer seals and polyethylene used as neutron shielding material. Particular attention is paid to the approach and first results of the third-party-founded research project LaMEP with the aim of further closure of existing knowledge gaps of safety relevant aging effects of such cask components. Symposium Verlängerte Zwischenlagerung Garching (Munich), Germany 22.06.2017 23.06.2017 0 Dietmar Wolff eng uncontrolled Metal seals eng uncontrolled Elastomer seals eng uncontrolled Neutron shielding material eng uncontrolled Aging Angewandte Physik Datei im Netzwerk der BAM verfügbar ("Closed Access") Präsentation