Abstract
Lead-bismuth eutectic (LBE) serves as one of the efficient coolants in Generation IV nuclear reactors. Considering LBE degradation, the aims of the present work are to propose a fatigue life prediction model at material-level and to obtain a component-level fatigue assessment. The LBE degradation factors of temperatures, strain ranges and strain rates are incorporated into the proposed life prediction model. Afterwards, fatigue life design curves are correspondingly put forward. Furthermore, recommended fatigue life assessment procedures are established for engineering applications. Finally, a continuous process in “deformation-cracking-repassivation” of oxide films is discussed to reveal oxidation-sensitive LBE degradation mechanism.
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