Fifth Technical Meeting on Divertor Concepts

Revised Divertor Design for the new European 'DEMO LAR' reactor.

28 Oct 2025, 14:05

20m

Press Room (M-Building) (IAEA Headquarters)

Oral Divertor Engineering and Materials Divertors for Next-Generation Devices

Speaker

Dr Giuseppe Mazzone (ENEA Nuclear Department, via E. Fermi 45, 00044 Frascati, Italy)

Description

The release of the new European DEMO LAR baseline affects the divertor design mainly in terms of input loads (e.g. heat flux) and poloidal profile. Two solutions are investigated, named “long leg”and “short leg” respectively. The long leg is defined and assumed as baseline, while the short leg is under further SOLPS analyses for complete investigations.
For both options, the grazing angle on vertical targets is maintained at 2° and the peak heat flux has been reduction during reattachment events nearly halved compared to the G1 baseline design option. This reduction ensures better manageability of the divertor under both nominal and off-normal conditions. The proposed 2D profiles should be supported by comprehensive plasma-wall interaction studies.
For these two solutions, the 3D models have been developed for a set of neutronic, thermohydraulic, electromagnetic and structural analyses for design optimization.