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Report No.

R&D to improve accuracy of nuclear prediction for HTGR, 3; Rossi-$$alpha$$ analysis for HTTR simulated core in KUCA

Nakajima, Kunihiro*; Sakon, Atsushi*; Takahashi, Kazuki*; Hohara, Shinya*; Hashimoto, Kengo*; Fukaya, Yuji   ; Sano, Tadafumi*

Time series data of neutron detector was obtained under Am-Be steady neutron source driven condition and neutron source from fuel in the graphite core system configured on B rack of the Kyoto University Critical Assembly (KUCA), and the reactor noise analysis with Rossi-$$alpha$$ method was performed. As a result, neutron correlation component could not be observed under Am-Be neutron source driven condition, but a significant correlation component was observed under fuel neutron source driven condition, and prompt neutron decay constant could be determined.



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