ITER Tokamak building is designed with seismic isolation pads lo protect the Tokamak components from seismic events. Two main cryolines, designated as ciyolines between buildings (Mg & CP), runs from interconnection box in cryoplant building to the Tokamak building. The lines outside Tokamak building are supported by seismically non-isolated supports. The cryoline design at the interface between seismically isolated and nonisolated support systems needs to be studied to fulfill the functional requirements. One of the options for interface, universal expansion joint has been modeled in CATIA with actual thickness of each ply and inter-ply distance, analyzed in ANSYS using contact definition, as a part of the preliminary study. The bellows have been checked by design calculation as per EJMA standard for the specified movements. The paper will present approach for conceptual design of interface, problem definition & boundary conditions, methodology for analysis and preliminary results of stress pattern for expansion joints.
ITER, Tokamak, Cryoline, Seismic, Multi-ply bellows, CATIA, ANSYS
