[3K10-13] Critical Experiment Facility

[3K13] Modification of STACY for study of criticality characteristics of fuel debris

(11)Design of experimental core with concrete rods

*Shouhei Araki¹, Satoshi Gunji¹, Arakaki Yu¹, Tomoki Yoshikawa¹, Kazuhiko Izawa¹, Kenya Suyama¹ (1. Japan Atomic Energy Agency)

Keywords:Fukushima Dai-ichi NPP, modified STACY, Critical Experiment, Fuel Debris, concrete

In order to study the criticality characteristics of fuel debris, experiments with concrete rods are designed in the modified STACY. We produced some concrete rods, which consist of an Al alloy cladding tube and concrete pellets, by way of trial, and obtained properties such as compositions and density of them. In this study, reactivity worth was estimated based on the concrete rod properties.