Application of Fast Fourier Transform for Accuracy Evaluation of Thermal-Hydraulic Code Calculations

Use of Fast Fourier Transform for Sensitivity Analysis

“…The objective of this study was to use fast Fourier transform (FFT) based approaches to determine the sensitivity of output parameters. In the reference [2], the FFT based approaches have been used for the accuracy quantification. The difference between the accuracy quantification and the sensitivity analysis is that in the accuracy quantification the experimental data are compared to the code calculated data, while in the sensitivity analysis the reference calculation signal is compared to the sensitivity run calculation signal.…”