Concept Design of Divertor Remote Handling System for the FAST Machine

The paper presents a concept design of a Remote Handling (RH) system oriented to maintenance operations on the divertor second cassette in FAST, a satellite of ITER tokamak in the view of DEMO. Starting from ITER configuration, a suitably scaled system, composed by a Cassette Multifunctional Mover (CMM) connected to a Second Cassette End-Effector (SCEE), can represent a very efficient solution for FAST machine. The presence of a further system able to open the divertor port, used for RH aims, and remove the first cassette, already aligned with the radial direction of the port, is presumed. Although an ITER-like system maintains essentially shape and proportions of its reference configuration, an appropriate arrangement with FAST environment is needed, taking into account new requirements due to different dimensions, weights and geometries. Nevertheless, according to the main objective of any satellite tokamak, such an approach benefits the study of enhancements to ITER RH system and the exploration of alternative solutions as the exploitation of electric motors for FAST operations, instead of ITER's hydraulic actuators, due to the considerably lower weight of divertor cassette.