1.8. Section 2 of this Safety Guide discusses the overall process of demonstrating the safety of a radioactive waste disposal facility. Section 3 summarizes the main safety principles and safety requirements to be met in the preparation of the safety case. The overall goal of the subsequent sections is to provide guidance on how to meet these requirements. Section 4 elaborates on the concept of the safety case. The components of the safety case and its role in the development, operation and closure of a disposal facility are described. Possibilities for building confidence in the safety case are also discussed. Section 5 addresses methodology for the assessment of radiological impact after closure, which forms the core element of the safety case described in Section 4. Various steps in this process are outlined and discussed in detail. In particular, guidance and recommendations are provided on the management of uncertainties within the radiological impact assessment, as well as on the use of the outcomes of assessments for comparison with assessment criteria. Section 6 discusses specific issues that arise in the preparation of a safety case. Section 7 addresses documentation of the safety case, and indicates possible uses of the safety case in the development of the disposal facility. Section 8 provides guidance and recommendations on the regulatory review of the safety case.