Abstract
Radiation damage in structural materials for fast reactors is caused by the action of many different mechanisms, depending on the irradiation conditions, the composition and state of the material, and external factors. This damage affects considerably the physicomechanical and operating characteristics of the material and, thus, the economy of fast reactors. Experimental data and theoretical models of radiation damage make it possible to predict the basic factors which limit the efficiency of the structural material for high burnup values and also single out the basic problems in improving the core elements and materials. This applies in the first place to problems of accommodation of structural material swelling and problems of securing sufficiently high mechanical characteristics for large fluence values. Experimental data on swelling and long-term mechanical characteristics have a rather large scatter. It is necessary to understand the causes of this scatter in order to eliminate indeterminacies in design calculations and determine the conditions ensuring the greatest resistance of materials to radiation damage.
Published Version
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