Core Follow Calculation for Hanbit Unit 1 in Cycles 1 through 7 using DeCART2D/MASTER

The core follow calculation of Hanbit Unit 1 has been performed by using DeCART2D/MASTER codes system. The calculation results are compared with measurement data for the physical parameters such as CBC, ITC and reaction rates of incore detectors. As a result, the statistical parameters for estimating the calculation uncertainties are obtained for several important physical parameters such as CBC, ITC and relative neutron flux densities at various positions. It turns out that the maximum differences emerge as 55 ppm for CBC at ARO condition and -0.87 ppm/℃ for ITC, 466.1 pcm for HFP reactivity. In case of detector response, the standard deviation of the samples is calculated by 0.015, which is drawn from the observed samples at various cycles and burnup steps.