[en] This report evaluates eventual impacts of the date problem in computer-based systems, referred to as year 2000 or Y2K problem, on the safety of radioactive waste management. It addresses the various types of waste, their processing, storage and disposal, decommissioning activities and sealed sources in terms of the approach to the Y2K problem, eventual remediation or contingencies and regulatory considerations. It assesses also typical processes involved in radioactive waste management for their potential of being affected by the Y2K problem. It addresses also eventual impacts on records and data as well as instruments and measurements