Modification of STACY for study of criticality characteristics of fuel debris, 10; Criticality analysis of experimental core using debris structural material rods and investigation of acceptable core configuration

Yoshikawa, Tomoki ; Araki, Shohei   ; Arakaki, Yu; Izawa, Kazuhiko ; Gunji, Satoshi  ; Suyama, Kenya

In order to clarify the criticality characteristics of fuel debris, we plan experiments in the Static Experiment Critical Facility (STACY) by using concrete and steel simulating the structural materials of the core of the Fukushima Daiichi Nuclear Power Plant. In order to carry out the experiments, it is necessary to obtain a construction permit for the core with the debris structural material simulant mentioned above. In this presentation, we present the analysis results and the feasible core configuration for obtaining the certification from the regulatory body.