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A revision of the ENEA equation for predicting radiation damage of A533 and A508 steels is presented. Constant Chemistry Analysis (CCA), as in the previous work, has been adopted to reduce experimental data but a larger collection of data has been used. Damage is quantified through the increase in transition temperature,ΔT, which takes the form:ΔT = CF.fn, where CF (chemistry factor) and n are copper and nickel content dependent and f is the fluence. Steels considered in the analysis are A533 and A508 irradiated in test reactors with a Cu content ranging between 0.02 and 0.24% and Ni content ranging between 0.4 and 1.6%. The irradiation temperature was around 290°C, and the fluence varied from 1 to 9.1019 n/cm2. The main conclusion of the present analysis is that saturation, for the considered steels, does not take place at high fluence.
neutron irradiation, transition temperature, copper, nickel, fluence