Abstract Summary
• The coupled THM response of a generic HLW disposal facility under high temperature has been analysed focusing on thermal pressurization and thermal fracturing. The simulations use an advanced elastoplastic constitutive model with damage to represent the mechanical behaviour of the host rock. • Numerical simulations have been carried out for generic disposal configurations. The host rock is assumed to be the Callovo-Oxfordian claystone. • Near field damage is caused by both the excavation of galleries and the effect of thermal pressurization. The development of shear bands is limited during the initial excavation and waiting stages, but they increase
