Mesocarbon microbead based graphite for spherical fuel element to inhibit the infiltration of liquid fluoride salt in molten salt reactor
Zhong, YJ; Zhang, JP; Lin, J; Xu, LJ; Zhang, F; Xu, HX; Chen, Y; Jiang, HT; Li, ZW; Zhu, ZY; Guo, QG
2017
发表期刊JOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
卷号490期号:-页码:34-40
文章类型期刊论文
摘要Mesocarbon microbeads (MCMB) and quasi-isostatic pressing method were used to prepare MCMB based graphite (MG) for spherical fuel element to inhibit the infiltration of liquid fluoride salt in molten salt reactor (MSR). Characteristics of mercury infiltration and molten salt infiltration in MG were investigated and compared with A3-3 (graphite for spherical fuel element in high temperature gas cooled reactor) to identify the infiltration behaviors. The results indicated that MG had a low porosity about 14%, and an average pore diameter of 96 nm. Fluoride salt occupation of A3-3 (average pore diameter was 760 nm) was 10 wt% under 6.5 atm, whereas salt gain did not infiltrate in MG even up to 6.5 atm. It demonstrated that MG could inhibit the infiltration of liquid fluoride salt effectively. Coefficient of thermal expansion (LIE) of MG lies in 6.01 x 10(-6) K-1 (alpha(parallel to)) and 6.15 x 10(-6) K-1 (alpha(perpendicular to)) at the temperature range of 25-700 degrees C. The anisotropy factor of MG calculated by CTE maintained below 1.02, which could meet the requirement of the spherical fuel element (below 1.30). The constant isotropic property of MG is beneficial for the integrity and safety of the graphite used in the spherical fuel element for a MSR. (C) 2017 Elsevier B.V. All rights reserved.
关键词Isotropic Graphite
DOI10.1016/j.jnucmat.2017.04.003
关键词[WOS]ISOTROPIC GRAPHITE
收录类别SCI
语种英语
WOS记录号WOS:000403132300004
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28731
专题中科院上海应用物理研究所2011-2018年
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Zhong, YJ,Zhang, JP,Lin, J,et al. Mesocarbon microbead based graphite for spherical fuel element to inhibit the infiltration of liquid fluoride salt in molten salt reactor[J]. JOURNAL OF NUCLEAR MATERIALS,2017,490(-):34-40.
APA Zhong, YJ.,Zhang, JP.,Lin, J.,Xu, LJ.,Zhang, F.,...&Guo, QG.(2017).Mesocarbon microbead based graphite for spherical fuel element to inhibit the infiltration of liquid fluoride salt in molten salt reactor.JOURNAL OF NUCLEAR MATERIALS,490(-),34-40.
MLA Zhong, YJ,et al."Mesocarbon microbead based graphite for spherical fuel element to inhibit the infiltration of liquid fluoride salt in molten salt reactor".JOURNAL OF NUCLEAR MATERIALS 490.-(2017):34-40.
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