Tensile Properties of Irradiated Nuclear Grade Pressure Vessel Plate and Welds for the Fourth HSST (Heavy Section Steel Technology) Irradiation Series.

摘要

A series of experiments were conducted to determine the effect of neutron irradiation on the fracture toughness of nuclear pressure vessel materials. One plate (HSST plate 02) and four welds of A 533 grade B class 1 steel were examined. The welds were made by current (about 1979) practice. As part of this study, tensile properties were measured after irradiation to 2 x 10 to the 23rd power neutrons/sq m at 288C. The strength of all four welds increased with irradiation. Yield strength was about 10% more sensitive to irradiation than was ultimate strength. Tensile ductility was not affected significantly by irradiation.