[2J01-05] Subcritical Experiment and Analysis

[2J03] Reactor Noise Analysis for a Subcritical Reactor System Driven by a Spallation Neutron Source in KUCA

(1)Rossi-α and Feynman-α analysis considering delayed-neutron contribution

*Kunihiro Nakajima¹, Kazuki Takahashi¹, Atsushi Sakon², Sin-ya Hohara², Kengo Hashimoto², Masao Yamanaka³, Tadafumi Sano³, Cheolho Pyeon³ (1. Graduate School of Science and Engineering, Kindai University, 2. Atomic Energy Research Institude, Kindai University, 3. Institute for Integrated Radiation and Nuclear Science, Kyoto University)

Keywords:Reactor Noise Analysis, Feynman-α, Rossi-α, Prompt Neutron Decay Constant, Spallation Neutron Source, Accelerator Driven System

We carried out that Feynman-α and Rossi-α analysis for a subcritical system driven by a spallation neutron source in the Kyoto University Critical Assembly (KUCA). We analyzed to adding uncorrelated term by delayed neutron to the fitting formula that considering the uncorrelated by the pulse neutron source. Uncorrelated component by delayed neutron was observed and prompt neutron decay constant was obtained by considering delayed-neutron contribution even under driven by a spallation neutron source.