Chapter 2: Introduction to Nuclear Safety

Enhancement of safety of currently operating NPPs in the framework of Periodic Safety Reviews

Para 1.3 of SSR-2/1 (Rev. 1) states that “it might not be practicable to apply all the requirements of this Safety Requirements publication to nuclear power plants that are already in operation or under construction. In addition, it might not be feasible to modify designs that have already been approved by regulatory bodies. For the safety analysis of such designs, it is expected that a comparison will be made with the current standards, for example as part of the periodic safety review for the plant, to determine whether the safe operation of the plant could be further enhanced by means of reasonably practicable safety improvements“.