| Popis: |
The sensitivity of LMFBR design parameters to nuclear data uncertainties is investigated. Based on a review of the available cross section literature, the uncertainties in the cross sections of 240Pu, 241Pu, and 242Pu, as well as 239Pu and 238U, are evaluated. The effects of these cross section uncertainties upon reactor parameters are assessed by making uniform cross section adjustments within the range of uncertainties. The sensitivity calculations consider two methods of maintaining the system at critical: (1) by adjusting the core enrichment, and (2) by adjusting the amount of control in the core. The results of these sensitivity calculations are compared with target accuracies for calculation of reactor parameters. These sensitivities are further used to estimate the nuclear data uncertainties which would be allowable to meet the target accuracies. |
