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Uncertainty quantification of lead and bismuth sample reactivity worth at Kyoto University Critical Assembly

KUCAにおける鉛及びビスマスサンプル反応度価値の不確実性の定量化

Pyeon, C. H.*; 山中 正朗*; 福島 昌宏   

Pyeon, C. H.*; Yamanaka, Masao*; Fukushima, Masahiro

KUCAで測定された鉛(Pb)及びビスマス(Bi)サンプル反応度価値における不確実性について、SCALE6.2/TSARコードを用いて解析し、アルミニウム(Al)を参照サンプルとしてBiサンプルへの置換により測定されたBiサンプル反応度価値において、$$^{27}$$Al及び$$^{209}$$Bi散乱断面積の影響を数値的に明らかにした。

Uncertainty quantification of lead (Pb) and bismuth (Bi) sample reactivity worth is numerically determined using the SCALE6.2 code system and experimental results obtained from the solid-moderated and solid-reflected core at the Kyoto University Critical Assembly (KUCA) to demonstrate the sensitivity coefficients of aluminum (Al) and Bi scattering reactions. From the results of the numerical analyses, the impact of $$^{27}$$Al and $$^{209}$$Bi scattering cross sections obtained using SCALE6.2/TSAR is disclosed on the Bi sample reactivity worth using Al reference and Bi test samples, although the uncertainty itself is small in the Bi sample reactivity worth.

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パーセンタイル:68.53

分野:Nuclear Science & Technology

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