Helium loop for the HCPB Test Blanket Module

The primary loop for the Helium Cooled Pebble Bed Test Blanket Module (HCPB-TBM) has been investigated with regard to layout definition, selection and dimensioning of components including piping and mechanical integration of the circuit into the different sections of ITER. The accommodation of the main components of the helium loop into the Torus Coolant Water System (TCWS) vault turned out as the most challenging point. Additionally operational states have been defined and the dynamic circuit behaviour has been investigated during transitions between operational states and accident situations with the RELAP5- code.