The influence of temperature features on the fuel burn-up fraction.
The results of numerical study of the influence of the coolant and fuel temperature features of on the efficiency of the nuclear fuel use are presented. An equation which describes the results of numerical calculation and allows to perform a preliminary estimation for the water-cooled and water-moderated reactors is obtained. It is shown that the reduction of temperature of coolant and nuclear fuel leads to the increase of the reactor lifetime and fuel burn-up fraction. <i>Keywords</i>: nuclear fuel, efficiency, nuclear reactor, WWER.