[1I05-07] Subcriticality Evaluation Method

[1I07] Measurement of Subcriticality in Dollar Units using Time-Domain Decomposition Based Integral Method

Asahi Nonaka¹, *Tomohiro Endo¹, Sho Imai¹, Kenichi Watanabe¹, Akio Yamamoto¹, Masao Yamanaka², Cheol Ho Pyeon² (1. Nagoya University, 2. Institute for Integrated Radiation and Nuclear Science, Kyoto University)

Keywords:subcriticality, integral method, point kinetics equation, Kyoto University Critical Assembly, transient experiment, fuel assembly

Time-Domain Decomposition based Integral (TDDI) Method is developed to measure the subcriticality in dollar units from only the time variation in the neutron count. In this presentation, we report the experimental results of the TDDI method for the subcritical transient caused by unloading the fuel assemblies in the KUCA-A core.