Design and Analysis Of Double Wall Vacuum Vessel Of SST-2

Abstract

The design of Vacuum Vessel includes different phases like Preliminary Design of Complete Fusion Reactor, Conceptual Design of Vacuum Vessel and Engineering Design of Vacuum Vessel followed by Design by Analysis approach applied to Vacuum Vessel against different individual and combined loading condition. The Designed Methodology for all the phases mentioned above has been defined and applied to design Double Wall Vacuum Vessel of Steady-state Superconducting Tokamak-2(SST-2). The First phase of Design is the Preliminary Design of complete Fusion Reactor. The bulk thickness of Vacuum Vessel can be determined from Neutronics Calculation where radial build up of Fusion Reactor is required as input. So, Preliminary Design of all the Plasma Parameters and Toroidal Field Coil, Central Solenoid etc is to be carried out in order to get the radial build at inboard side of Fusion Reactor. The Second phase includes Conceptual Design which includes designing of the shell configuration, In-wall shielding configuration, cooling arrangement in Vacuum Vessel. In Engineering Design stage, shell thickness of the Vacuum Vessel is determined against the design pressure using Analytical and Numerical method (FEA). In case of double wall structures, ribs are provided to reinforce the structure. Major Dimensions like Height, Width, Major Radius can be obtained from Toroidal Field coil based on geometrical constraints. The Same engineering Design Methodology has been applied to SST-2 Vacuum Vessel. Design By Analysis (DBA) is proposed for Vacuum Vessel. The Designed Vessel from the previous step is to be analyzed against different individual and combined loading condition. Eddy current analysis of ITER vacuum vessel (A Case Study) and SST-2 Vacuum Vessel has been performed. Structural and Thermal analyses considering different Structural and Thermal Loads was carried out. Thus, the Design of Vacuum Vessel involves many groups(Design Dept, Vessel Dept, Magnet Dept, Neutronics Dept, Reactor Physics Dept) working concurrently and collaboratively.