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Report No.

Monju core physics test analysis with JAEA's calculation system

Takano, Kazuya ; Sugino, Kazuteru; Mori, Tetsuya ; Kishimoto, Yasufumi*; Usami, Shin 

Monju core physics test analysis was performed using JAEA's neutronics calculation system with various nuclear data libraries (JENDL-3.2, JENDL-3.3, JEFF-3.1, ENDF/B-VII) for the purpose to validate the JAEA's neutronics calculation system, which utilizes JENDL-3.3. Subsequent sensitivity analysis was carried out to clarify the cause of differences in calculation results among nuclear data libraries. It is found that the calculation results obtained by JENDL-3.3 and JAEA's neutronics analysis system showed good agreement with the measured values and its accuracy is identical or better than JEFF-3.1, ENDF/B-VII in most core characteristics. Thus, the validity of JAEA's neutronics analysis system with JENDL-3.3 was confirmed. From the sensitivity analysis, it was identified that Monju can be quite valuable for the verification of the cross sections of such high-order Pu isotopes as $$^{240}$$Pu and $$^{241}$$Pu and also for the validity of temperature dependency of the self-shielding using its property as a power reactor.



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