Sensitivity Coefficients for Leakage and Nonleakage Components of Sodium Void Worth

Sensitivity coefficients for leakage and non-leakage components of sodium void worth in a fast critical assembly are calculated based on generalized perturbation theory. Dependence of the sensitivity coefficients on void patterns is small, although total sensitivity coefficients change remarkably, depending on void patterns. Thus once sensitivity coefficients for the two components are obtained for a reference void pattern, sensitivity coefficients for arbitrary void patterns in the same zone can be accurately predicted.