Other potential damage
Design of pressurized enclosures

The risk of creep is considered to be excluded if the limitations on the working temperature of materials given in Appendix Zl of the RCC-M, which gives the mechanical properties that can be used for dimensioning, are respected. For higher-temperature applications, as encountered in fast-neutron reactors, the RCC-MR includes provisions for taking account of creep, relaxation and fatigue-creep interaction, which are outside the scope of the present dossier.

Other effects can affect the structure's overall or local behavior.

• In terms of overall behavior, the damage modes likely to affect the targeted safety margins may result from wear, generalized corrosion, erosion-cavitation or corrosion-erosion mechanisms.

  Wear phenomena can occur at the level of parts in contact, in the presence of relative movements. Wear is limited to areas such as pencil casings...