Intergranular stresses, generated during cyclic loading of AISI type 316H stainless steel can significantly alter the steady-state creep lifetime of this material. However, the relationship between generation of these intergranular stresses and macroscopic deformation rate is not well understood. First part of the proposed experiment will look at how these intergranular stresses are generated and how they evolve during repeated cycling. Second and final part of the experiment will quantify the macroscopic deformation at various point of the loading cycle with different intergranular stresses by introducing creep dwells. This will establish the link between generation of micro stresses and macroscopic deformation. The experimental data will be compared and interpreted using elastic plastic self-consistent modelling, EBSD and laboratory tests. Results from successful completion of this experiment will contribute to the on-going development of life time assessment techniques of materials used in nuclear power plants.