Effects of proton irradiation on Chinese domestic RPV steels by variable energy positron annihilation spectroscopy

16th International Conference on Positron Annihilation

Jiang, J.^1 ; Wu, Y.C.^1 ; Wang, S.J.^1 ; Liu, X.B.^2 ; Wang, R.S.^2

School of Physics and Technology, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan 430072, China^1

Center of Plant Life Management, Suzhou Nuclear Power Research Institute, Suzhou 215004, China^2

关键词: Dose-dependent;    Positron energy;    Reactor Pressure Vessel;    RPV steels;    Variable-energy positron annihilation spectroscopies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012037/pdf
DOI  :  10.1088/1742-6596/443/1/012037

来源: IOP

【 摘 要 】

The effects of proton irradiation on Chinese domestic reactor pressure vessel (RPV) A508-3 steels have been investigated by variable energy positron annihilation spectroscopy. The samples were irradiated using 110 keV protons at doses ranging from 0.2 to 2.0 ×1017cm-2at room temperature. Defect profiles were analyzed by measuring the S parameter as a function of incident positron energy from 0.25 to 26keV, corresponding to mean depths of up to ∼940nm. It is interesting to note that the S-parameter increases rapidly with increasing dose, which implies that matrix damage has a direct relation to dose-dependent effects in microstructural evolution.