The probability of a major LOCA in a PWR plant followed by f

The probability of a major LOCA in a PWR plant, followed by failure of the ECCS, melting of the core, failure of containment spray and heat removal systems, and consequent failure of containment due to overpressure is estimated to be 5 times 10^-6 per year. The release of radioactivity accompanying this accident would lead to approximately 62 acute fatalities. What is the risk from this accident?

Solution

Risk = Probability (or Frequency) X Consequences

        = 5X10^-6 X 62

        = 0.00031 fatalities per year (Ans)