[2J06-09] Criticality Safety

[2J06] Criticality control technique development for Fukushima Daiichi fuel debris

(50)Sub-criticality Measurement in a KUCA Decoupled Core Simulating Large-Scale Fuel Debris

*Shinya Kano^1,2, Satoshi Wada^1,2, Tsuyoshi Misawa³, Kitamura Yasunori³ (1. IRID, 2. Toshiba ESS, 3. Kyoto Univ.)

Keywords:Fukushima-Daiichi NPP Accident, Fuel debris, Nuclear criticality safety, Sub-criticality measurement, Feynman-α method

The sub-criticality measurement in a KUCA decoupled core simulating large-scale fuel debris was performed. It is confirmed that Feynman-α method can be applicable for detecting approach to “local” criticality of large-scale fuel debris.