Assessment of Nuclear Data Files Via Benchmark Calculations: A Report on the NEACRP/IAEA International Comparison Calculation of a Large LMFBR

摘要

The results of an international comparison calculation of a large (1250 MWe) LMFBR benchmark model are presented and discussed. Eight reactor configurations were calculated. Parameters included with the comparison were: eigenvalue, k/sub infinity/, neutron balance data, breeding reaction rate ratios, reactivity worths, central control rod worth, regional sodium void reactivity, core Doppler and effective delayed neutron fraction. Ten countries participated in the comparison, and fourteen solutions were contributed. The discussion focuses on the variation in parameter values, the degree of consistency among the various parameters and solutions, and the identification of unexpected results. The results are displayed and discussed both by individual participant and by groupings of participants (e.g., results from adjusted data sets versus non-adjusted data sets). Unexpected large variations among results were observed for radial reaction rate and worth distributions and for the central control rod worth. (ERA citation 03:057002)