Introduction to Risk Based Inspection课件.pptVIP

Introduction to Risk Based Inspection Definitions Risk allows people to view potential hazards that simultaneously accounts for both the likelihood and consequences of an event. Risk Based Inspection (RBI) is a systematic tool that helps users make informed business decisions regarding inspection and maintenance spending. RBI Capabilities RBI has the capability to do the following: Evaluate current inspection plans to determine priorities for inspections Evaluate future plans for decision making Evaluate changes to basic operations as they affect equipment integrity Identify critical contributors to risk that may otherwise be overlooked Establish economic optimum levels of inspection as weighed against risk reduction Incorporate “Acceptable Risk” levels Measuring Risk Risk is a combination of likelihood and consequence. One way to illustrate risk is to display the likelihood and consequence factors on an X-Y plot. Likelihood and Consequence X-Y Plot Iso Risk Lines Semi-Quantitative Risk Matrix High Risk Medium Risk 5 4 3 2 1 LIKELIHOOD CATEGORY A B C D E CONSEQUENCE CATEGORY Low Risk Medium Risk Med . High Risk High Risk Medium-High Risk RBI Analysis Comparison API 581 RBI Levels of Analysis The API RBI procedure has three levels of analysis: Level I - screening tool that quickly highlights the high-risk equipment that users may wish to assess in greater detail. Level II - a step closer to being a quantitative analysis than Level I, and it is a scaled down approach of Level III. Provides most of the benefit of Level III analysis, but it requires less input than Level III. Level III - quantitative approach to RBI providing the most detailed analysis of the three levels. Why do we Need RBI? Most inspection codes/standards based on LOF, not COF Reduce risk of high consequence failures Improve the cost effectiveness of inspection and maintenance resources Provide a basis for shifting resources from lower to higher risk equipment Measure and understand the risks as