Extension of the ACE file perturbation tool in FRENDY; Implementation of the perturbation method for the elastic scattering angle distribution based on the maximum entropy method

Maruyama, Shuhei   

The Japanese nuclear data processing code FRENDY implements the ACE file perturbation tool based on the random sampling method, which can be used to quantify nuclear data-induced uncertainties. However, it has not been able to evaluate the uncertainty due to the scattering angle distribution, which is not ignored in the uncertainty quantification of fast reactor core analysis and shielding analysis. Recently, a method to quantify the uncertainty based on the maximum entropy method has been proposed by the authors. In this report, a perturbation function for the uncertainty of the elastic scattering angular distribution based on this proposed method has been added to the FRENDY/ACE file perturbation tool.