Mechanical and Physical Properties of Irradiated Type 348 Stainless Steel

摘要

A type 348 stainless steel in-pile tube irradiated to a fluence of 3 x 10 exp 22 n/cm exp 2 , E > 1 MeV (57 dpa), was destructively examined. The service had resulted in a maximum total creep of 1.8% at the high fluence. The metal temperature ranged between 623 and 652 exp 0 K, hence the thermal creep portion of the total was negligible. Total creep was greater than had been anticipated from creep data for austenitic stainless steels irradiated in other reactors. The objectives of the destructive examination were to determine the service-induced changes of mechanical and physical properties, and to assess the possibility of adverse effects of both these changes and the greater total creep on the prospective service life of other tubes. (ERA citation 05:020907)