Developing and Presenting a Safety Case

Events and processes varying widely in their rates, timing, likelihood of occurrence and impact affect the evolution of a repository and its environment. The identification of relevant events and processes is generally regarded as tasks for the implementer, although regulators may specify certain, sometimes site- or concept-specific events and processes that should, as a minimum, be considered for inclusion in a safety case, based on their own understanding and possibly as a result of dialogue with implementers (Appendix 4, observations from responses to Question 6.2a).