Monju core physics test analysis with various nuclear data libraries

Mori, Tetsuya ; Sato, Wakaei; Uematsu, Mari; Hazama, Taira ; Suzuki, Takayuki 

The previous Monju core physics test is analyzed using a JAEA's neutronics calculation system with various nuclear data libraries, JENDL-3.2, JENDL-3.3, JENDL/AC-2008, JEFF-3.1, and ENDF/B-VII. Analyzed the core characteristics are fixed absorber reactivity worth, fuel sub-assembly reactivity worth, coolant reactivity worth, burn-up coefficient, and reaction rate. It is found that the C/E (calculation over measurement) values are within experimental errors for the fixed absorber reactivity worth and the fuel sub-assembly reactivity worth. But that for the burn-up reactivity coefficient is around the experimental error and shows a tendency of overestimation. Further investigation is ongoing to improve the accuracy of the system. Obtained knowledge and experience will be reflected in the next physics test analyzes.