Method for determination of effect of preliminary thermo-mechanical loading (PTL) of metal materials of bodies of nuclear power reactors

摘要

Method for determination of effect of preliminary thermo-mechanical loading (PTL) of metal materials of bodies of nuclear power reactors that operate under pressure on increase of resistance of those to fragile destruction includes investigation of series of samples of metal material of body of nuclear reactor after metal material obtains given dose of neutron radiation that correspond to duration and modes of operation of body of nuclear power reactor before annealing and series of samples that correspond to duration and modes of operation of body of nuclear power reactor after annealing by given technological modes. For each series of samples one plots diagrams of viscosity in coordinates- ТК for materials under investigation in range of operation temperatures 293К - 598К with determination of maximal values of characteristics of viscosity of destructionof materials under investigation used at calculation of evaluation of effect of PTL on increase of resistance of steels and metals of bodies of nuclear power reactors against fragile destruction through determination of evaluation of critical value of coefficient of intensity of tensionafter PTL.