Structural-phase state and creep of mixed nitride fuel

10th International School-Conference on Materials for Extreme Environment: Development, Production and Application

Konovalov, I.I.^1 ; Tarasov, B.A.^1 ; Glagovsky, E.M.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe Highway 31, Moscow

115409, Russia^1

关键词: Carbon content;    Intergranular slips;    Linear dependence;    Mixed nitrides;    Operating parameters;    Structural-phase state;    Thermal component;    Thermal creep;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/130/1/012030/pdf
DOI  :  10.1088/1757-899X/130/1/012030

来源: IOP

【 摘 要 】

By the analysis of thermal creep data in conjunction with structural-phase state the most likely mechanisms of UN creep are considered. An equation relating the thermal and radiation creep of nitride fuel with such important parameters as plutonium content, porosity, grain size, the content of impurities of transition metals and oxygen, the carbon content has been suggested. At stationary operating parameters in reactor the creep of nitride fuel with technical purity is defined by the thermal component at mechanism of intergranular slip and by the radiation component, which plays a significant role at temperatures below 1100°C. Both types of creep in a first approximation have a linear dependence on the stress.