[2M01-05] Subcriticality Experiment and Evaluation 1

[2M01] Feynman-α Analysis for a Subcritical Reactor System Driven by an Unstable Spallation Neutron Source

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

Keywords:Neutron Correlation Analysis, Feynman-α, Spallation Neutron Source, Kyoto University Critical Assembly, Accelerator Driven Subcritical Reactor

We carried out that Feynman-α analysis for a subcritical system driven by accelerator in the Kyoto University Critical Assembly (KUCA), intended to confirm experimentally an enhancement of the correlation amplitude Y_inf and to observation of multiplicity by spallation neutron source. The proton beam intensity was unstable but we approximated this effect by straight and we can observe the Y_inf enhancement by spallation source.We calculated the number of neutrons emitted per the reaction of spallation from enhancement of Y_inf.This result indicated that the number of neutrons are scattered around 30~70, and we evaluated quantitatively multiplicity of spallation neutron source.