1.1.1. Introduction of approaches for PLiM

There are two conceptual approaches that can be applied concerning a utilities’ plan for continued operation. One is based on periodic safety review (PSR) [24], another on license renewal application (LRA) [25]. The USA practice and regulations follow LRA concept, while most of the European countries and Japan use PSR for obtaining permission for continued operation and to support eventual arguments for long term operation. In some Member States, these two different concepts and regulatory approaches have been adapted (e. g. Spain, Hungary, and the Republic of Korea, see table 1).