FRACTURE RESISTANCE OF CAST FERRITIC C-MN STEEL FOR CONTAINER OF SPENT NUCLEAR FUEL

摘要

Fracture resistance of cast ferritic steel predetermined for containers of spent nuclear fuel has been evaluated based on sets of different fracture mechanical test specimens and assessment procedures. Standard fracture toughness values were determined from 1T SENB specimens and compared with data from pre-cracked CVN specimens (P-CVN). The other parameters that have been in focus of interests were: the effect of metallurgical technology (two melts followed), specimen location (midthickness vs. surface locations) in thick walled plate, the effect of loading rate (here followed on CVN and P-CVN specimens), statistical effects etc.