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Potential cladding and structural materials for the different GenIV systems are presented in Table 1.

There is a strong link between the materials integrity and nuclear safety for all nuclear reactors. The operation conditions in new generation reactors will be more demanding and thus knowledge about materials behaviour and integrity under operation are critical. To evaluate and choose proper materials to be used for GenIV reactors, it is important to know the boundary limits for use of the materials under the specific operating conditions. Safety analysis is based on technological assessment where the materials integrity has a decisive role.

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