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	RBI Assessment

Consequence Properties

The Consequences Properties tab allows you to make the required inputs to evaluate the consequences of failure in terms of flammability, toxicity and financial loss. These properties apply regardless of the selected damage factors and damage factor properties.

Note: For Tank650 equipment, if a COURSE or TANKBOTTOM component is not pressurized (i.e., the operating pressure is 101325 Pa) then the analysis is simplified and has fewer consequence properties.

RBI performs an API RBI RP Level 1 consequence analysis to calculate the risk based upon releases for common risk-causing fluids. Flammable and non-flammable consequence areas are calculated for each hole release rate based upon a given hole size within the component, and these are all combined based on the relative frequency of failure for each hole size. (See the Fluid List.)

Flow Rates/Flammability

The Flow Rates/Flammability properties define the general properties of the process fluid and the storage/process area. Note the following:

• Use the Representative Process Fluid drop-down list to select the fluid that the component most often handles.

• In the Atmospheric Temperature field enter a value that must be >= -100 and <= 100 Celsius or the equivalent in other units.

• In the Component Mass(i.e., the amount of material stored in the component) and Inventory Mass(i.e., the amount of material included in the component and that can flow into the component from other connected components) fields, enter values greater than 0.

Toxicity

The Toxicity properties are used to determine the physical damage from loss of containment or rupture that may occur to the surrounding equipment, components, personnel and environment. The impact areas may occur from pool fires, flash fires, fireballs, jet fires and/or vapor cloud explosions. Note the following:

• In the Toxicity Mitigation Reduction (%) field, enter a value greater than or equal to 0 that specifies the percentage by which the toxic effects are lessened due to mitigation systems.

• In the remaining fields, enter the specific mass fractions(i.e., the fraction of the process fluid that is composed of that compound) as decimal values that must be >= 0.0 and <= 1.0.

Financial

The Financial properties are used to determine the monetary cost of failure. These calculations take into consideration or calculate the hole costs, material costs, plant downtime, cost of the equipment, the cost on the surrounding area and the personal injury costs.

Fluid List

The following table shows the risk-causing fluids that can be considered in the analysis.

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