RBI 581 Probability of Failure calculation (EXTERNAL CHLORIDE SCC)

• You will be directed to the RBI 581 Detail Page for the specific Equipment. Here, you will see the Component, along with the Inspection History and Specs section.

• Below in the Degradation Mechanism section click New D.M.

• Select the “Chloride SCC External” DM that you added earlier to the CL.

• Click Save.

• The RBI 581 calculation tabs will appear. Stay on the Probability of Failure (PoF) tab. Note: One of the first calculations we need for the RBI 581 assessment is the PoF calculation. This calculation varies depending on the type of DM and, in some cases, the Equipment Group or Component Type. In our case, we selected a DM that uses the same calculation across all Equipment Groups and Component Types.

• Fill in all the yellow required input fields.

• Click the Calculate button. Note: The button will only be enabled once all required parameters are filled in; otherwise, a warning will appear, and the button will remain disabled. Additionally, if any data is modified after a calculation has already been completed, a warning will be shown, and the Calculate button will be re-enabled.

• After the calculation the result will show in the right section of the screen.

• Click Calculation steps to review the calculation.

• Next fill in the Consequence of Failure (CoF) form.

• When the RBI 581 assessment is Final Approved the Dynamic Form for the PoF becomes read-only.

Info

The PoF calculation makes use of a Dynamic Form of type "Probability of Failure". The Dynamic Forms used in RBI 581 are Global forms, meaning users cannot edit them unless they have CSA rights. There should be one Dynamic Form per condition, typically based on a DM, though some PoF calculations may vary by Equipment Group or Component Type. The condition used in the Dynamic Form can be viewed in the wizard. In the example of CHLORIDE SCC EXTERNAL it shows that the dynamic form will only apply if the Degradation Mechanism is "CHLORIDE SCC EXTERNAL."