Accuracy of interpolation methods for resonance self-shielding factors.
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概要
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Accuracies of various interpolation methods used for the "table look-up" method of resonance shielding factors are studied. The cubic spline interpolation is shown to produce the most excellent and stable accuracies with short computing time.<BR>The effects of the differences in the effective cross sections given by the various interpolation methods on nuclear characteristics of fast reactors are calculated by using the JAERI-Fast Set Version II. The maximum deviations of the effects are summarized as follows : 0.2% for the effective multiplication factor, 1.5% for the control rod reactivity worth, 6% for Doppler effect, 2.5% for the reaction rate distribution in the blanket region and negligible small for the sodium void effect, respectively, in typical fast reactor.
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