API-580 Risk Mitigation and Control Measures 3

Question 1

In API-580 RBI, what is the primary criterion used to establish the inspection interval for a given piece of equipment?

Accepted Answer

The date risk is calculated to reach the defined risk tolerance threshold

Answer

The equipment manufacturer's recommended service interval

Answer

A fixed interval mandated by jurisdictional inspection codes

Answer

The interval at which the last inspection was performed

Question 2

Which of the following is NOT considered a risk mitigation measure within an API-580 RBI program?

Accepted Answer

Increasing the risk tolerance threshold to avoid inspection

Answer

Installing cathodic protection on buried piping

Answer

Adding online corrosion monitoring probes

Answer

Applying internal linings to reduce corrosion rates

Question 3

How does the installation of a berm or containment dike around a storage tank affect its COF in an RBI assessment?

Accepted Answer

It reduces the consequence of failure by limiting the spread of released fluid

Answer

It reduces the probability of failure by preventing overfill

Answer

It increases risk by adding complexity to the emergency response

Answer

It has no effect unless the berm is designed to API-650 specifications

Question 4

According to API-580, what is the appropriate next step after implementing a risk mitigation measure?

Accepted Answer

Re-evaluate the risk to confirm it now falls within acceptable limits

Answer

Archive the original RBI assessment and start a completely new study

Answer

Remove the equipment from the RBI scope since it is now mitigated

Answer

Notify the regulator that the risk has been eliminated

Question 5

What is the significance of the 'risk target date' in an API-580 RBI mitigation plan?

Accepted Answer

The future date when risk is projected to reach the acceptable risk threshold if no action is taken

Answer

The date by which all RBI assessments must be reviewed by management

Answer

The deadline for completing the initial RBI study for the facility

Answer

The date on which the equipment was first commissioned into service

Question 6

In API-580, how does reducing the operating temperature below the brittle fracture transition temperature affect the RBI risk profile for a carbon steel vessel?

Accepted Answer

It increases the probability of brittle fracture, raising overall risk

Answer

It eliminates all active damage mechanisms in the vessel

Answer

It reduces the consequence of failure by minimizing inventory

Answer

It has no effect because brittle fracture is not addressed by API-580

Question 7

Which of the following actions represents an 'active' risk mitigation measure as opposed to a 'passive' one in API-580 RBI?

Accepted Answer

Operating corrosion inhibitor injection pumps with continuous monitoring

Answer

Upgrading vessel material to a more corrosion-resistant alloy

Answer

Installing thicker insulation to protect against external corrosion

Answer

Increasing the design corrosion allowance during the next vessel replacement