Guidelines for enabling conditions and conditional modifiers in layer of protection analysis (LOPA)
- Hoboken, New Jersey : Wiley, 
- Physical description
- 1 online resource (xxvii, 105 pages) : illustrated.
- Includes bibliographical references and index.
- List of Tables ix List of Figures xi Abbreviations and Acronyms xiii Glossary xv Acknowledgements xxiii Preface xxv 1 Context 1 1.1 LOPA Overview 1 1.2 Pertinent LOPA Variations 10 1.3 When to Use Enabling Conditions and Conditional Modifiers13 1.4 Risk Criteria Endpoints 16 2 LOPA Enabling Conditions 23 2.1 Definition and Defining Characteristics 23 2.2 Interrelationship with Initiating Event 23 2.3 Time-At-Risk Enabling Conditions 23 2.4 Campaign Enabling Conditions 30 2.5 Other Possible Enabling Conditions 34 2.6 Documenting and Validating Enabling Conditions 34 3 LOPA Conditional Modifiers 37 3.1 Definition and Defining Characteristics 37 3.2 Probability of a Hazardous Atmosphere 42 3.3 Probability of Ignition or Initiation 44 3.4 Probability of Explosion 49 3.5 Probability of Personnel Presence 55 3.6 Probability of Injury or Fatality 60 3.7 Probability of Equipment Damage or Other Financial Impact65 3.8 Documenting, Managing and Validating Conditional Modifiers69 4 Application to Other Methods 71 4.1 Quantitative Risk Analysis 71 4.2 Use of Enabling Conditions and Conditional Modifiers withScenario Identification Methods 75 4.3 Barrier Analysis and Diagrams 79 Appendices 81 A Simultaneous Failures and Double Jeopardy 83 B Peak Risk Concepts 91 C Example Rule Set for LOPA Enabling Conditions 95 Example Rule Set for LOPA Enabling Conditions 95 References 99 Index 103.
- (source: Nielsen Book Data)
- Publisher's Summary
- The initial Layer of protection analysis (LOPA) book published in2001 set the rules and approaches for using LOPA as an intermediatemethod between purely qualitative hazards evaluation/analysis andmore quantitative analysis methods. Basic LOPA provides anorder-of-magnitude risk estimate of risk with fairly reproducibleresults. LOPA results are considered critical in determining safetyintegrity level for design of safety instrumented systems. This guideline clarifies key concepts and reinforces thelimitations and the requirements of LOPA. The main scope of theguideline is to provide examples of CMs and ECs and to provideconcrete guidance on the protocols that must be followed to usethese concepts. The book presents a brief overview of Layer ofProtection Analysis (LOPA) and its variations, and summarizesterminology used for evaluating scenarios in the context of atypical incident sequence. It defines and illustrates the mostcommon types of ECs and CMs and shows how they interrelate to riskcriteria as well as their application to other methods.
(source: Nielsen Book Data)
- Publication date
- Center for Chemical Process Safety, New York, NY.
- Available in another form
- Print version: Guidelines for enabling conditions and conditional modifiers in layers of protection analysis (LOPA) Hoboken, New Jersey : John Wiley and Sons, Inc.,  9781118777930 (DLC) 2013020445