[2G14-18] Criticality Control Technique Development 1

[2G14] Study on container capacity limitations of remove fuel debris in defueling Fukushima Daiichi nuclear power station

(1)Effect of floor materials on the criticality of fuel debris leaked from a container during defueling work

*Kei Yoshioka¹, Naoyuki Takaki¹, Hiroki Takezawa¹, Toru Morikawa¹, Isamu Sato¹ (1. Tokyo City University)

Keywords:Fukushima Daiichi Nuclear Power Station, Nuclear reactor physics, fuel debris, Criticality safety, container capacity limitations

回収作業中に燃料デブリが回収容器から落下し、原子炉圧力容器及び格納容器底部の床面に円錐状に堆積した場合を想定し、落下したデブリの臨界性が床面から受ける影響を床面の材質ごとに定量的に評価した。