Thermo-Mechanical Justification of the FA3 RPV Cover and Bottom Domes Under Normal and Upset, Emergency and Faulted Loading Situations

This paper describes in a synthetic manner the work performed for the thermo-mechanical justification of the FA3 cover and bottom domes. Details on the postulated defects definition, thermo-hydraulics loading determination, thermo-mechanical model definition and margin evaluation are provided.

As a conclusion it is shown that despite the presence of the Carbon macro-segregation, the mechanical justification of both domes could be achieved with significant margins.