Leakage of cryogenic fluid can bring diverse consequences within confined environment like FLNG. In particular, leakage from pressurized refrigerant system is expected to form cryogenic pool, which could initiate brittle fracture of the structure as well as violent evaporation of flammable gas. The authors put the series of different leakage scenarios under light and quantitatively analyzed the potential consequences in an attempt to provide overall pictures of this hazard yet to have been made clear so far. Further, use of brittle fracture arresting steel – a new strain of carbon steel produced through special TMCP technology – was explored on its potential to mitigate the risk.

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