TY - JOUR
T1 - Experimental analyses of βeff/Λ in accelerator-driven system at Kyoto University Critical Assembly
AU - Yamanaka, Masao
AU - Pyeon, Cheol Ho
AU - Endo, Tomohiro
AU - Watanabe, Kenichi
AU - Chiba, Go
AU - van Rooijen, Willem Frederik Geert
N1 - Publisher Copyright:
© 2019, © 2019 Atomic Energy Society of Japan. All rights reserved.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - The capability of βeff /Λ obtained by λ-mode and ω-mode calculations is examined for target subcriticality in the accelerator-driven system through a comparison with that obtained in the pulsed-neutron source (PNS) experiments at the Kyoto University Critical Assembly. Directly measured results of βeff /Λ, α and ρ$ in the PNS experiments are validated by varying the experimental conditions: the external neutron source, detector position, detector type and subcriticality ranging between 500 and 7500 pcm. The numerical analyses of βeff /Λ are conducted by using MCNP6.1 together with ENDF/B-VII.1 for λ-mode calculations and PARTISN (SCALE6.2.2 with ENDF-VII.1 for the effective cross sections) for both the λ-mode and the ω-mode calculations. The comparison between calculated and measured βeff /Λ with varying subcriticality shows good agreement between the experiments and the ω-mode calculations, although a difference is observed between the experiments and the λ-mode calculations.
AB - The capability of βeff /Λ obtained by λ-mode and ω-mode calculations is examined for target subcriticality in the accelerator-driven system through a comparison with that obtained in the pulsed-neutron source (PNS) experiments at the Kyoto University Critical Assembly. Directly measured results of βeff /Λ, α and ρ$ in the PNS experiments are validated by varying the experimental conditions: the external neutron source, detector position, detector type and subcriticality ranging between 500 and 7500 pcm. The numerical analyses of βeff /Λ are conducted by using MCNP6.1 together with ENDF/B-VII.1 for λ-mode calculations and PARTISN (SCALE6.2.2 with ENDF-VII.1 for the effective cross sections) for both the λ-mode and the ω-mode calculations. The comparison between calculated and measured βeff /Λ with varying subcriticality shows good agreement between the experiments and the ω-mode calculations, although a difference is observed between the experiments and the λ-mode calculations.
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U2 - 10.1080/00223131.2019.1666057
DO - 10.1080/00223131.2019.1666057
M3 - Article
AN - SCOPUS:85074030633
VL - 57
SP - 205
EP - 215
JO - Journal of Nuclear Science and Technology
JF - Journal of Nuclear Science and Technology
SN - 0022-3131
IS - 2
ER -