[en] The principal objectives of the study included the following: (1) To make significant strides in the provision of improved bases or criteria for decision-making involving risk to the public health and safety (where a risk involves the combination of a hazard and the probability of that hazard); (2) to make significant progress in the structuring and development of improved, and possibly alternative, general methodologies for the assessment of risk and risk-benefit for technological systems; (3) to develop improvements in the techniques for the quantitative assessment of risk and benefit; (4) to apply methods of risk and risk-benefit assessment to specific applications in nuclear power (and possibly other technological systems) in order to test methodologies, to uncover needed improvements and gaps in technique and to provide a partial, selective, independent assessment of the levels of risk arising from nuclear power. Thirty-seven reports were issued previously under their individual titles, and are listed in Appendix B. Executive summaries of the reports are presented in Appendix C