The benchmark problems consist of UO2 fuel and MOX fuel problems, each of which has a pin cell configuration (Fig.1), a PWR assembly configuration (Fig.2) and a BWR assembly configuration (Fig.3). In the pin cell configuration, the basic nuclear parameters such as an infinite multiplication factor, temperature and void reactivities and various isotopic concentrations as functions of burnup are required to be evaluated. The isotopes to be evaluated were selected from the viewpoint of the back-end requirement as well as the reactivity point of view. In the assembly configurations, the important characteristics that can be investigated only in an assembly calculation, a power peaking factor and the effect of burnable poison (Gadolinia) on the reactivity coefficients or burnup change in an infinite multiplication factor, are required to be evaluated.
benchmark problem suite is here.Though we don't know the true solutions of the problems, the inter-comparison between the results by various analysis codes and nuclear data sets can provide the information about the deviation of the results and may give us some suggestions to the improvement of the calculation methods or nuclear data.
