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Application of FFTBM with signal mirroring to improve accuracy assessment of MELCOR code
, Article Nuclear Engineering and Design ; Volume 308 , 2016 , Pages 238-251 ; 00295493 (ISSN) ; Ghofrani, M. B ; D'Auria, F ; Sharif University of Technology
Elsevier Ltd
2016
Abstract
This paper deals with the application of Fast Fourier Transform Base Method (FFTBM) with signal mirroring (FFTBM-SM) to assess accuracy of MELCOR code. This provides deeper insights into how the accuracy of MELCOR code in predictions of thermal-hydraulic parameters varies during transients. The case studied was modeling of Station Black-Out (SBO) accident in PSB-VVER integral test facility by MELCOR code. The accuracy of this thermal-hydraulic modeling was previously quantified using original FFTBM in a few number of time-intervals, based on phenomenological windows of SBO accident. Accuracy indices calculated by original FFTBM in a series of time-intervals unreasonably fluctuate when the...