The Technical Meeting on the Effects of Hydrogen Supersaturation and Defect Stabilization in Nuclear Fusion Reactor Materials is a subtask related to conclusions drawn from the 5th International Workshop on Models and Data for Plasma-Material Interaction in Fusion Devices (MoD-PMI 2021). The Scientific Secretary is Kalle HEINOLA.

The meeting discussed and reviewed current understanding on the physical processes related to effects and formation of:

• hydrogen (H/D/T) supersaturated layers in fusion reactor wall materials at sub-threshold displacement energies and the effect of surface roughness to the supersaturated layer formation; and
• vacancy-type defect stabilization by hydrogen (H/D/T) in fusion reactor materials under neutron and heavy ion bombardment at energies above displacement threshold;

and made conclusions and recommendations on:

• the significance of these effects to material behaviour under fusion conditions
• data needs for filling the knowledge gaps, e.g. define defects for systematic DFT/MD calculations
• future activities with multi-scale calculations.

Organizing Committee

• Yves Ferro (Aix-Marseille Université, France)
• Kalle Heinola (International Atomic Energy Agency)
• Etienne Hodille (Commissariat à l’énergie atomique et aux énergies alternatives (CEA) Cadarache, France)
• Julien Denis (Aix-Marseille Université, France)
• Yosvany Silva Solís (Aix-Marseille Université, France)

More information for meeting participants is available at the IAEA's Indico web page (login required).