Advances in the FAST program

Abstract

FAST (Fusion Advanced Studies Torus) is a p ro p osal for a Satellite Facility which can contribute the ra p id ex p loitation of ITER and p re p are ITER and DEMO regimes of o p eration, as well as ex p loiting innovative DEMO technology. FAST o p erates with high p erformance H-Mode (BT up to 8.5 T; Ip up to 8 MA) as well as Advanced Tokamak o p eration (Ip=3 MA), and full non inductive current scenario (Ip=2 MA) [1). The p roject is based on a dominant 30 MW of ICRH, 6 MW of LH and 4 MW of ECRH. Helium gas at 30K is used for cooling the resistive co pp er magnets, which dimensions have been determined to limit the coil tem p erature at the end of the longest p ulses ( p ulse length u p to 170 s). The p eak current density in the reference H-mode is about 45 MA/m 2 • The Finite Element Method (FEM) has been em p loyed to analyse the stresses of the load assembly structure (2) using the ANSYS code. Due to the full structural coo p eration, the Toroidal Field Coils, Central Solenoid and mechanical structure, have been modelled as a whole, using mechanical and thermal smeared p ro p erties. Structural analyses were p erformed at the most significant times of the o p erating scenario. The FW consists of a bundle of coaxial tubes armoured with 4