Importance of Nuclear Data Uncertainties in Criticality Calculations
1 Department of Nuclear Engineering, Universidad Politécnica de Madrid, Spain
2 Instituto de Fusión Nuclear, Universidad Politécnica de Madrid, Spain
The aim of this paper is to study the importance of nuclear data uncertainties in the prediction of the uncertainties in keff for LWR (Light Water Reactor) unit-cells. The first part of this work is focused on the comparison of different sensitivity/uncertainty propagation methodologies based on TSUNAMI and MCNP codes; this study is undertaken for a fresh-fuel at different operational conditions. The second part of this work studies the burnup effect where the indirect contribution due to the uncertainty of the isotopic evolution is also analyzed.
© Owned by the authors, published by EDP Sciences, 2012