Damage region formation in ferritic steels induced by light water reactor neutron spectrum

A new theoretical model for damage region formation is proposed. The model is based on numerical solution of the Boltzmann transport equation for knocked-on atoms. A key point of this model is the selfconsistent determination of subcascade overlapping energy E_over (the threshold energy for distinguished damage region formation). Damage region density and size distributions in ferritic steels (Fe–0.2 wt% Cu and Fe–0.2 wt% Cu–0.3 wt% Si) under neutron irradiation in light water reactor spectrum were calculated.