The original goal of PRA includes which of the following?

• A. To improve fuel efficiency
• B. To estimate the cost of safety upgrades
• C. To analyze and understand severe accident behavior, and then identify and fix the plant vulnerabilities
• D. To maximize production capacity

Answer: (C)

Probabilistic Risk Assessment is about understanding how severe accidents could unfold in a nuclear plant and identifying where the plant is most vulnerable. The central goal is to analyze and understand severe accident behavior and then pinpoint and fix those vulnerabilities to reduce risk. This focus on modeling accident paths and strengthening weaknesses is what sets PRA apart from aims like improving fuel efficiency or maximizing production; those are performance objectives, not the primary purpose of PRA. While considering the cost of safety upgrades can come into play during decision-making, it isn’t the fundamental purpose of PRA itself.