TY - JOUR
T1 - Irradiation-induced mixing of Na and K in graphite in molten salt reactor
T2 - An estimation based on ion beam irradiation
AU - Lei, Qiantao
AU - He, Zhoutong
AU - Qi, Wei
AU - Tang, Hui
AU - Zeng, Jianrong
AU - Deng, Qi
AU - Zhang, Can
AU - Guo, Na
AU - Zhang, Hailei
AU - Zhang, Yajing
AU - Shen, Hao
AU - Zhou, Xingtai
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - The massive molten salt-graphite interface produced by liquid infiltration or vapor penetration in a molten salt reactor suggests the importance of irradiation-induced mixing and diffusion. We employed He+ ion beam irradiation to simulate neutron irradiation-induced mixing of Na and K in graphite. The depth distributions of both Na and K were measured by RBS (Rutherford backscattering spectrometry) and XPS (X-ray photoelectron spectroscopy) depth profiling. Both the mixing rate and the diffusion rates of the Na and K mark layers in the graphite induced by the ion beam irradiation were calculated. The results indicate that the diffusion rates of Na and K in the graphite reflector and/or moderator were several hundred nanometers per dpa irradiation dose. This could induce a change in the properties and cohesion of graphite.
AB - The massive molten salt-graphite interface produced by liquid infiltration or vapor penetration in a molten salt reactor suggests the importance of irradiation-induced mixing and diffusion. We employed He+ ion beam irradiation to simulate neutron irradiation-induced mixing of Na and K in graphite. The depth distributions of both Na and K were measured by RBS (Rutherford backscattering spectrometry) and XPS (X-ray photoelectron spectroscopy) depth profiling. Both the mixing rate and the diffusion rates of the Na and K mark layers in the graphite induced by the ion beam irradiation were calculated. The results indicate that the diffusion rates of Na and K in the graphite reflector and/or moderator were several hundred nanometers per dpa irradiation dose. This could induce a change in the properties and cohesion of graphite.
KW - Ion beam irradiation
KW - Ion-irradiation-induced mixing
KW - Irradiation enhanced diffusion
KW - Nuclear graphite
KW - RBS
KW - XPS
UR - https://www.scopus.com/pages/publications/85053717119
U2 - 10.1016/j.nimb.2018.08.018
DO - 10.1016/j.nimb.2018.08.018
M3 - Article
AN - SCOPUS:85053717119
SN - 0168-583X
VL - 450
SP - 100
EP - 107
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
ER -