A Risk-Informed Approach to the Development of Severe Accident Requirements

Abstract

This paper describes the application of a risk-informed approach to the development of severe accident requirements. The aim is to ensure prevention of accident progression and mitigation of the consequences of severe plant conditions so that the risk to the public that originates from accidents outside the design basis is also addressed, and to demonstrate that power plant operation does not pose any significant additional risk in comparison with other risks to which the public is normally exposed. Some illustrative examples of relevant requirements under consideration are also provided.