Winfrith Magnox site ceased its operation in 1990 . More than 1 000 drums of waste originated from the Steam Generating Heavy Water Reactor at drums were placed in the Treated Radwaste Store (TRS) awaiting transfer to the Harwell Intermediate- Level Waste facility... Realisation of scenario or design studies, site preparation, visualization of premises that are difficult to access, remote visit and inspection of installations or even training, nuclear operators, throughout the life cycle of their installation, are moving towards increased use of twins and digital tools to improve their level of control and optimize their interventions.