Spent Fuel Storage Pool (SFP) Probabilistic Safety Assessment/Analyses (PSA) is one of the remarkable areas after the Fukushima Dai-ichi accident. Hitachi-GE developed a SFP PSA model for UK ABWR (United Kingdom Advanced Boiling Water Reactor) GDA (Generic Design Assessment) which considered the following characteristics.

? Adverse effects from reactor accident progression

? Structural integrity in case of cask drop onto SFP

? Hydrogen management in the Level 2 PSA modeling

? Seismic

? Internal Fire and Internal Flooding