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Report No.

Analysis of MOZART critical experiment using the IRPhEP handbook data

Chiba, Go

Using the experimental data in the IRPhEP handbook, an experimental analysis of the MOZART experiment is carried out with JENDL-4.0. The C/E values for K$$_{rm eff}$$ are 0.9981 and 1.0006 for MZA and MZB. In reaction rate ratios at the core center, C values agree with E values within 1.0% for F25/F49 and C28/F49, and within 4.0% for F28/F25, F40/F49 and F41/F49. In sodium void reactivity worths, C values are about 10% larger than experimental values for the non-leakage-dominated data. For the leakage-dominated data, absolute differences normalized by the leakage component are less than 10%. In material worths, C values are about 5% larger than E values for plutonium. C values agree with E values within 10% differences for uranium and SS. In control rod worths, C values are 2% to 5% larger than E values. In reaction rate distributions, C values agree well with E values in core regions. Underestimation is observed systematically in C values of threshold reactions in blanket regions.



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