unnecessarily inflate the calculated risk values. Risk Assessment Personnel. This person(s) should have a thorough understanding of risk analysis by education, training, and/or experience. He/she should have received detailed training on the RBI methodology and on the procedures being used for the RBI assessment. Boundary limits are identified to determine what is vital to include in the assessment. Managing Risk by Reducing Uncertainty Through Inspection RBI process should be the linkage of risks with appropriate inspection, process control or other risk mitigation activities to manage the risks. The primary work products of the RBI assessment and management approach are plans that address ways to manage risks on an equipment level. An ISO-risk line represents a constant risk level Achieving Lowest Life Cycle Costs with RBI. RBI should enhance the prediction of failures caused by damage mechanisms. Risk reduction is only part of risk management. Risk-based inspection is a tool to provide an analysis of the risks of loss of containment of equipment. Risk of fire numerical. Removal of dead-legs, provide mitigation of POF. Risk avoidance Group components that have the same material of construction and are exposed to the same internal and external environment. Safety consequences could be expressed based on the severity of an injury (e.g. fatality, serious injury, medical treatment, first aid) or expressed as a category linked to the injury severity (e.g. A through E). A key element in determining the magnitude of the consequence is the volume of fluid released. The equipment inspector or inspection specialist is generally responsible for gathering data on the condition and history of equipment in the study. Risk Analyst is responsible for assembling all of the data and carrying out the RBI analysis Failure Mode small hole. Quality of input data is equally important no matter what approach to RBI is selected. The purpose of establishing operational boundaries is to identify key process parameters that may impact deterioration. The primary product of an RBI effort should be an inspection plan for each equipment item evaluated. The level of the unmitigated risk should be used to evaluate the urgency for performing the inspection. An RBI assessment made on new equipment or a new project, while in the design stage, may yield important information on potential risks. A qualitative analysis using broad ranges requires a higher level of judgment, skill and understanding from the user than a more quantitative approach. Record of the team members involved should be captured, as well as the skill set that they bring to the team for RBI purposes. This will be helpful in understanding the basis for the risk assessment when the analysis is repeated or updated. Nature and extent of damage mechanism, is often unpredictable. The RBI process is focused on maintaining the mechanical integrity of pressure equipment items. Probability of failure of specific consequence is depending on. 1) Magnitude of event 2) consequence of failure. The main production consequences for RBI are financial. The data quality has a direct relation to the relative accuracy of the RBI analysis.
32. Risk is the combination of occurrence of event and its consequence. 33. The results of inspections, changes in process conditions and implementation of maintenance practices can all have significant effects on risks, and therefore the inspection plan and can trigger the need to perform a reassessment. 34. Reassessment of risk is performed except rerating. 35. The risk remaining after risk mitigation is called residual risk. 36. The risk prior to mitigation activities is unmitigated risk. 37. A QRA deals with total risk, not just risk associated with equipment damage. 38. Continuum of approaches