Transient thermal and stress response of a helium-cooled tungsten plate-type divertor

A number of different helium-cooled divertor design concepts have been proposed for MFE fusion power plant application. The larger-scale helium-cooled Tungsten-alloy plate-type divertor configuration (typically 20 cm (tor.) × 100 cm (pol.) × 6 cm (rad.)) provides an advantage of reduction in number of assembly units in a power plant and the associated reduction in complexity and possibly costs. Transient thermal and thermomechanical responses of the divertor plate during the plant startup and shutdown operations have been analyzed with a coupled transient thermo-fluid and thermal-stress approach. Results are presented in this paper.