Evaluation and uncertainty analysis of the Kritz-2 critical benchmark experiments - 161

In order to validate new nuclear cross-section evaluations and computational methods, a large number of benchmarks experiments were performed in the past. OECD/NEA launched several projects aiming to collect, preserve and disseminate the benchmark data in a user-friendly format. Reactor physics benchmarks are covered by the IRPhE project. This paper presents the preparation of the IRPhE compilation for the KRITZ-2 critical experiments, consisting of altogether six configurations, both UO2 and MOX, measured at 2 different temperatures at STUDSVIK. These configurations were selected for the purpose of the OECD/NEA Uncertainty Analyses in Modeling (UAM) benchmark activities. Uncertainties due to input data uncertainties, modeling errors, and numerical approximations were studied, with particular emphasis on the uncertainties in the nuclear cross section data. SUSD3D sensitivity-uncertainty code with the SCALE-6.0 and JENDL-3.3 covariance data were used in this study. The consistency among the C/E values and the overall computational uncertainties is discussed. (authors)