Presentation Information
[2D19]Comparison study of differences among analysis methods for reactor noise characteristics under various detection efficiency conditions
*Kenichiro Suga1, Shoichi Ikeda1, Kunihiro Nakajima1, Atsushi Sakon1, Yoshiyuki Takahashi2, Sin-ya Hohara1, Kengo Hashimoto1 (1. Kindai Univ., 2. Kyoto Univ.)
Keywords:
KUCA,critical,Feynman-α,Rossi-α,correlation function,prompt-neutron decay constant,detection efficiency
In KUCA, BF3 counters were installed at positions within the graphite reflector located at distances of approximately 24, 40, 61, and 83 cm from the core edge of a solid-moderated core. Neutron detection time series data were acquired under critical conditions and analyzed using the Feynman-α, autocorrelation function, and Rossi-α Type-I methods. The detector-position dependence of the detection efficiency obtained from each analysis agrees within statistical errors. The statistical errors of the prompt neutron decay constant derived from the autocorrelation function and Rossi-α Type-I analyses are approximately inversely proportional to the detection efficiency. However, this inverse relationship does not hold for the Feynman-α analysis, which results in larger statistical errors.