[1I01-04] Criticality Safety of Fuel Debris

[1I01] Criticality calculations of fuel debris in various conditions during falling down

*Anton Smirnov¹, Ekaterina Bogdanova¹, Georgy Tikhomirov¹, Hiroki Takezawa², Jun Nishimaya³, Toru Obara³ (1. MEPhI, 2. TCU, 3. Tokyo Tech)

Keywords:Fuel debris, Monte Carlo, Criticality analysis

Tokyo Tech, TCU and MEPhI work together to develop advanced criticality analysis method for securing safety in removal work of Fukushima Daiichi fuel debris. Criticality calculations of fuel debris in various conditions during falling down were performed by universities. The Russian Monte Carlo code MCU was used and improved to perform debris modeling. Positions of fuel debris particles falling in water are calculated by Particleworks.