FIRST STEPS TO COUPLED HYDRAULIC AND MECHANICAL CALCULATIONS WITHIN A PARAMETER STUDY TO DEFINE POSSIBLE CORE DESIGNS FOR THE CONVERSION OF FRM IIKaltrina Shehu, Cezary Bojanowski, Aurelien Bergeron, Winfried Petry and Christian ReiterEPJ Web Conf., 247 (2021) 08011DOI: https://doi.org/10.1051/epjconf/202124708011