Application of the FFT method to evaluate the accuracy of SBLOCA data base

The Fast Fourier Transform Based Method (FFTBM) was developed at University of Pisa to achieve a quantitative evaluation of the accuracy of thermal-hydraulic system code calculations. International cooperation was established to transfer the method with various Institutions all over the world. In the case documented in this report one scientists from CNEN (Nuclear Energy Commission) in Brazil visited University of Pisa for several months within the framework of an IAEA (International Atomic Energy Agency) activity to implement and to apply the method. The present document has been issued by UNIPI and describes the application of the method to Small Break Loss of Coolant Accident Database available at University of Pisa.