Risk Importance Measures in the Design and Operation of Nuclear Power Plants
4. Risk Importance Measures in NPP Risk Assessment
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It can be said that the idea for risk importance measures originates from the concept of traditional sensitivity analysis, which might not necessarily be related to the risk (reliability) studies. One type of sensitivity analysis is to change one of the parameters and see how much effect it makes on the result. A systematic approach would be to calculate the fractional change in result for a fractional change in a variable or parameter.