Reactivity coefficients simulation of the Iranian VVER-1000 nuclear reactor using WIMS and CITATION codes

SARCS cross section library generator: Part two: Fast and quasi transients evaluations

“…À Quasi transients: a) Reactivity coefficients: Coolant density, fuel temperature and boric acid reactivity coefficients during first cycle of BNPP are compared with BNPP reference data and previous study (Faghihi et al, 2007). Our results closely follow the reference data and show the improvement of BNPP depletion calculation compared to previous study (Faghihi et al, 2007). b) Power peaking factor: A maximum 9% difference between PARCS and Neutronics Album observed for the relative power of the FAs during first cycle (Fig.…”

“…The comparison of PARCS calculation with BNPP Neutronics Album and the study employed WIMSD4 and CITATION (Faghihi et al, 2007) shows that the present study has closer agreement with the BNPP Neutronics Album than the WIMSD4 study.…”

Pattern optimization of PWR reactor using hybrid parallel Artificial Bee Colony

“…In addition, the group constants of FAs are generated by WIMS-D5 which deals with one-dimensional transport equation (Winfrith, 1985). The cross-sections are then used as input file of CITATION to calculate power distribution of FAs in core and effective multiplication factor, in order to obtain fitness function (Faghihi et al, 2007). In this study, in order to narrow down the search space, we fixed the position of FAs in periphery and in the center of core; therefore we need to allocate the best positions for the remaining 20 FAs .…”

Study on secondary shutdown systems in Tehran research reactor

“…Additional control is provided by the inherent negative temperature coefficient of reactivity of the system (Alikhan, 1999;Faghihi et al, 2007). Reactors with negative temperature coefficients behave quite differently.…”