The present volume of Atomic and Plasma-Material Interaction Data for Fusion presents the results of a coordinated research
project (CRP) on plasma-wall interaction with irradiated tungsten and tungsten alloys in fusion devices. The chemical element
tungsten is widely foreseen as a plasma-facing material in a fusion reactor, where it is subject to an intense neutron radiation
flux. This publication provides details of a 5-year project devoted to better understanding the properties of tungsten in
this environment through experimental study and theoretical modelling. Of particular practical concern is the viability of
the metal as a structural material after irradiation damage, and its increased propensity to absorb the tritium fuel used
in a fusion reaction.