During the past 30 years many fatigue tests and fatigue analysis improvements have been developed in France in order to improve Codified Fatigue Rules of RCC-M, RSE-M and RCC-MRx.

This paper will present comments and proposals for development of these rules associated to Gaps and Needs in order to finalize and justify the AFCEN Codes new rules.

Recently 3 new international R&D results confirm possible un-conservative fatigue material data:

- High cycle fatigue in air for stainless steel,

- Environmental effects on fatigue S-N curve for all materials, and in particular stainless steels,

- Fatigue Crack Growth law under PWR environment for stainless steel.

In front of these new results, AFCEN is working on a 1st set of rules based on existing knowledge:

- Air fatigue curve

- PWR Environmental effects

A periodic up-dating of AFCEN proposed rules will be done using French and International R&D programs with a particular attention on harmonization with other Code rules developed in USA, Japan and Germany, in particular.

This content is only available via PDF.
You do not currently have access to this content.