Most canisters for spent fuel dry storage in the US are fabricated from austenitic stainless steel. When exposed to chloride containing atmosphere in marine environment welded canister can be susceptible to chloride-induced stress corrosion cracking that can affect confinement function as a result of crack initiation and propagation through canister wall thickness.In assessment key factors affecting CISCC are identified in terms of environments (temperature relative humidity and chloride concentration) stresses and material conditions. A methodology to estimate the time for crack initiation and crack penetration depth as a function of time is proposed and technical gaps are discussed. An evaluation of operation experience for the outer diameter SCC of stainless steel piping at power plants are also performed for comparison