"What-if?" calculations to illustrate fault-movement effects on a HLW repository

Miyahara, Kaname  ; Inagaki, Manabu; Kawamura, Makoto; Ebina, Takanori*

This paper illustrated how to conduct "what if?" calculations in a transparent manner based on a developed formal procedure in order to treat perturbations of disruptive fault movement on a HLW disposal system. Calculation cases are defined due to stepwise combination of loss of key safety functions as what if? assumptions. The calculation results show effectiveness and robustness of the multibarrier system, even considering the most extreme combination of what if assumptions.