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压力容器(RPV)在工况条件下经中子辐照后将导致力学性能退化,发生辐照脆化现象。相关研究表明,引起RPV钢辐照脆化的因素包括自身材料因素和服役环境因素。材料因素是RPV钢自身性质对辐照脆化的影响,包括材料化学成分、微观组织特性与晶粒尺寸,环境因素是RPV服役环境对辐照脆化的影响,包括中子注量、中子注量率、中子能谱和辐照温度。
Pressure vessel (RPV) in the working conditions after neutron irradiation will lead to the degradation of mechanical properties, the occurrence of radiation embrittlement. Related studies have shown that the factors that cause the embrittlement of RPV steel irradiation include its own material factors and service environment factors. Material factors are the effects of RPV steel’s own properties on radiation embrittlement, including the chemical composition, microstructure and grain size of the RPV steel. The environmental factors are the impact of RPV service environment on radiation embrittlement, including neutron flux, neutron Fluence rate, neutron energy spectrum and irradiation temperature.