Cross-section adjustment: sensitivity to uncertainties

It is well known that the correct procedure of cross-section adjustment calls for detailed analyses of all possible uncertainty sources. A detailed uncertainty analysis involves not only standard deviations, but also the correlations between data. Although conceptually correct, and thus yielding credible results, one should always keep in mind what approximation can be made without an appreciable loss of credibility. The sensitivity of the adjustment procedure to various degrees of sophistication in the input uncertainty representation is tested on five integral experiments measuring average ²³⁵U, ²³⁸U, and ²³⁹Pu fission cross sections in two geometrically simple standard neutron fields.