[1I01-06] Fuel Debris Characterization

[1I05] Improvement of the STACY critical assembly to measure critical characteristics of fuel debris

(2)Computations for reactivity measurements of pseudo fuel debris

*Satoshi Gunji¹, Shouhei Araki¹, Kenya Suyama¹, Kazuhiko Izawa¹ (1. JAEA)

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

JAEA has been planning to Measure of critical characteristics of pseudo fuel debris using the STACY critical assembly. For this purpose, we calculated the reactivities that of several insertion materials for two insertion methods into the experimental core configurations.