Disclosure of the oscillations in kinetics of the reactor pressure vessel steel damage at fast neutron intensity decreasing

7th International Conference Radiation-thermal Effects and Processes in Inorganic Materials

材料科学;物理学

Krasikov, E.^1 ; Nikolaenko, V.^1

National Research Centre, Kurchatov Institute, Kurchatov Sq. 1, Moscow

123182, Russia^1

关键词: Irradiation conditions;    Neutron intensities;    Precise definition;    Radiation embrittlement;    Radiation stability;    Reactor Pressure Vessel;    Reactor pressure vessel steels;    Self-organization process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/168/1/012004/pdf
DOI  :  10.1088/1757-899X/168/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Fast neutron intensity influence on reactor materials radiation damage is a critically important question in the problem of the correct use of the accelerated irradiation tests data for substantiation of the materials workability in real irradiation conditions that is low neutron intensity. Investigations of the fast neutron intensity (flux) influence on radiation damage and experimental data scattering reveal the existence of non-monotonous sections in kinetics of the reactor pressure vessels (RPV) steel damage. Discovery of the oscillations as indicator of the self-organization processes presence give reasons for new ways searching on reactor pressure vessel (RPV) steel radiation stability increasing and attempt of the self-restoring metal elaboration. Revealing of the wavelike process in the form of non monotonous parts of the kinetics of radiation embrittlement testifies that periodic transformation of the structure take place. This fact actualizes the problem of more precise definition of the RPV materials radiation embrittlement mechanisms and gives reasons for search of the ways to manage the radiation stability (nanostructuring and so on to stimulate the radiation defects annihilation), development of the means for creating of more stableness self recovering smart materials.