High Temperature Gas Cooled Reactor Steam Generator Research on Stress-Rupture Test of High Temperature Materials and Welded Joints

Abstract

The outlet design temperature of the steam generator of high temperature gas-cooled reactor is 570°C, and the design temperature of the high temperature components have reached or exceeded the creep temperature of the material. In the creep temperature range, the allowable stress of the material mainly depends on its high temperature stress-rupture strength. Therefore, it is necessary to High-temperature stress-rupture test studies are carried out on materials and welded joints to verify whether their stress-rupture strength can meet the design requirements. High-temperature stress-rupture tests were carried out on 9 kinds of high-temperature materials and 5 kinds of welded joints by designing the non-standard specimen for heat exchange tubes, reasonably setting test stress points, parallel samples and sampling positions.14 double logarithmic curves of stress-rupture time were drawn, and the long-term high-temperature stress-rupture strength of high-temperature materials and welded joints was extrapolated, Providing important data support for the safety evaluation and life evaluation to the steam generator of high temperature gas-cooled reactor.