The book has been developed in conjunction with NERS 462, a course offered every year to seniors and graduate students in the University of Michigan NERS program. The first half of the book covers the principles of risk analysis, the techniques used to develop and update a reliability data base, the reliability of multi-component systems, Markov methods used to analyze the unavailability of systems with repairs, fault trees and event trees used in probabilistic risk assessments (PRAs), and failure modes of systems. All of this material is general enough that it could be used in non-nuclear applications, although there is an emphasis placed on the analysis of nuclear systems. The second half of the book covers the safety analysis of nuclear energy systems, an analysis of major accidents and incidents that occurred in commercial nuclear plants, applications of PRA techniques to the safety analysis of nuclear power plants (focusing on a major PRA study for five nuclear power plants), practical PRA examples, and emerging techniques in the structure of dynamic event trees and fault trees that can provide a more realistic representation of complex sequences of events. The book concludes with a discussion on passive safety features of advanced nuclear energy systems under development and approaches taken for risk-informed regulations for nuclear plants. An authoritative guide to enhancing the safety, reliability, and availability of nuclear energy systems The catastrophic events of March 2011 in Japan serve to remind the next generation of nuclear professionals that a nuclear accident anywhere is a nuclear accident everywhere. This timely resource provides a necessary introduction to risk and reliability assessment as well as an overview of nuclear power plant safety analysis, augmented by real-world examples drawn from design and operating experience. Developed in conjunction with Nuclear Engineering and Radiological Sciences (NERS) 462, a course offered every year to seniors and graduate students in the University of Michigan NERS program, this book is needed more than ever, as nuclear power is once again becoming a viable option for new electrical generation facilities. The first half of the book covers the principles of risk and reliability analysis, the techniques used to develop and update a reliability database, the reliability of multi-component systems, and Markov methods used to analyze the unavailability of a system with repairs. The second half covers applications of the methods for probabilistic risk assessment of complex engineered systems, together with deterministic safety analysis of nuclear power plants. Also featured are: Fault trees and event trees used in probabilistic risk assessments Failure modes of systems A review of major accidents and incidents in commercial nuclear plants over the past three decades Passive safety features of advanced nuclear systems that are under development Advanced topics such as dynamic event tree analysis and binary decision diagrams for fault tree evaluation Approaches taken for risk-informed regulations for nuclear plants More than sixty solved examples and more than 140 exercises Presenting synergistic coverage of both probabilistic and deterministic risk assessment techniques for nuclear systems, this text is invaluable for advanced undergraduate students in nuclear engineering, first-year graduate students, and practicing engineers in the area of risk and reliability assessment, particularly those in the nuclear industry.