[2G14-18] Criticality Control Technique Development 1

[2G15] Study on container capacity limitations of removed fuel debris in defueling Fukushima Daiichi nuclear power station

(2)Criticality effect of deposition angle of fuel debris leaked from a container during defueling work

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

Keywords:Fukushima Daiichi Nuclear Power Station, Nuclear reactor physics, Fuel debris, Container capacity limitations, Criticality safety

回収作業中に燃料デブリが回収容器から落下して、すでにデブリが蓄積している原子炉圧力容器(RPV)下部等へ円錐状に堆積した場合を想定し、円錐の堆積角度と臨界性の関係を定量的に評価した。