... exposed to a thermal environment of 260 ° C for 209 000 h . This temperature is below the range (minimum of 370 ° C ) where the effects of long-term thermal aging are typically considered relevant. Charpy impact, master curve transition temperature, upper-shelf fracture toughness, and tensile testing were...

... acquired master curve reference temperature data (ASTM E1921), it was discovered that there is a stress relief time effect on the transition temperature. The stress relief time effect can be seen in the drop weight T NDT data, but its effect is less clear in the 41 J (30ft-lb) Charpy impact data...

... establish the limits of material condition applicability of the Master Curve. Calculations based on limited data provide validation of the proposed model. The models' ability to predict shifts in transition temperature with irradiation and its application to RP vessel integrity assessment will also...