STRUCTURAL-ANALYSIS OF THE ITER VACUUM VESSEL FROM DISRUPTION LOADINGWITH HALO ASYMMETRY

Static structural analyses of the ITER vacuum vessel were performed wi th toroidally asymmetric disruption loads. Asymmetric halo current con ditions were assumed to modify symmetric disruption loads which result ed in net lateral loading on the vacuum vessel torus. Structural analy ses with the asymmetric loading indicated significantly higher vessel stress and blanket support forces than with symmetric disruption loads . A recent change in the vessel support design which provided toroidal constraints at each mid port was found to be effective in reducing to rus lateral movement and vessel stress.