Attachment systems for demo in-vessel components: Blanket, manifold and hot ring shield

New conceptual studies for the first commercial nuclear fusion reactor (DEMO) deal with the design of the in-vessel components and their integration into the reactor. The main in-vessel components are the breeding blankets, the helium supply unit, namely the manifold, and the hot ring shield (HRS). All of these components have to withstand different thermal and pressure loads, and loads during normal as well as off-normal operation, e.g. disruptions. The development of the different attachment systems for these in-vessel components is a major engineering challenge, requiring reliability under harsh environmental and loading conditions. In this report, requirements and possible solutions for the attachments between vacuum vessel (VV) and hot ring shield, between hot ring shield and MMS and between the manifold and blankets will be presented.