Realization of Category Requirements

Abstract

Safety goals, quantitative health objectives, subsidiary numerical objectives, and tolerable risks are dealt with in Chapter 1. Risk-informed categorizations of safety systems, SSCs and human actions are described in Chapter 2 from the point of view of safety significance in satisfying tolerable or acceptable risk levels. This chapter considers how the requirements demanded for each category can actually be satisfied by uncertainty management, compliance with standards and regulations, dependent failure management, safety margins, human-factors review, early detection and treatment, defense-in-depth, and performance evaluation.