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Index
Nuclear Engineering and Technology for the 21st Century – Monograph Series
Acknowledgement
Series Editor's Preface
Table of Contents
Abstract
1. Introduction
2. Safety analysis of NPP, the role of risk assessment, and measuring risk importance
3. Deterministic principles of safety importance and need for consideration of risk
4. Risk importance measures in NPP risk assessment
4.1 Background on importance measures in risk assessment
4.2 Importance measures broadly used in PRAs for NPPs
4.3 Examples of use of risk importance measures in risk-informed applications
4.4 Risk importance measures: focus of discussion in this monograph
5. Risk importance of component represented by a single basic event not involved in a CCF Group
5.1 Introductory considerations
5.2 Theoretical relation between RAW and RRW
5.3 FC for a single basic event
5.4 RAW for a single basic event
5.5 RRW for a single basic event
5.6 Reliability importance for a single basic event
6. Risk importance of a component represented by multiple basic events, none involved in a CCF Group (FT module)
6.1 Introduction
6.2 FC, RAW, RRW and reliability importance for component-level FT module
6.3 Example: importance measures for a FT module for failure of a standby pump
7. Risk importance of component represented by multiple different FT modules or basic events in different accident scenarios, none involved in a CCF Group
7.1 Introduction
7.2 FC
7.3 RAW
7.4 RRW and reliability importance
7.5 Example: standby pump with two different operating failure rates
8. Risk importance of component represented by a single basic event (failure mode) involved in a CCF Group
8.1 Introduction
8.2 Failure with CCF potential
8.3 Unavailability with no impact on CCF
9. Risk importance of component represented by multiple basic events (failure modes) involved in CCF Groups
9.1 Introduction
9.2 Failure with CCF potential
9.3 Unavailability with no impact on CCF
9.4 Particular CCF event
10. Demonstrative examples of the component-level importance measure
11. Limitations of risk importance measures
12. Summary
13. References
About the authors
Appendix A. Example from practice–calculation of risk importance measures by a PRA computer code
Appendix B. Demonstrating examples based on a simplified PRA model
B.1 Description of simplified PRA model used for demonstration
B.2 Examples concerning theoretical relation between RAW and RRW and importance measures for single basic event (Examples B1 through B4)
Index
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