Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors
| Autor: | Yajuan Zhong, Xiaoyun Li, Yan You, Jun Lin, Lu Junqiang, Zhu Libing, Liujun Xu, Zhiyong Zhu, Feng Zhang, Hui Tang, Yang Xu, Haoran Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Molten salt reactor Scanning electron microscope 020209 energy Mesocarbon microbead (MCMB) TK9001-9401 FLiBe infiltration 02 engineering and technology 030218 nuclear medicine & medical imaging Matrix (chemical analysis) Secondary ion mass spectrometry 03 medical and health sciences 0302 clinical medicine Nuclear Energy and Engineering Chemical engineering Thermal 0202 electrical engineering electronic engineering information engineering Fuel element Particle Nuclear engineering. Atomic power Graphite Particle size Molten salt Matrix graphite |
| Zdroj: | Nuclear Engineering and Technology, Vol 53, Iss 5, Pp 1569-1579 (2021) |
| ISSN: | 1738-5733 |
| Popis: | This study aims to provide microstructural characterization for the matrix graphite which molten salt reactors (MSRs) use, and improve resistance to molten salt infiltration of the matrix graphite for fuel elements. M esocarbon microbeads (MCMB) d ensified matrix g raphite A3-3 ( MDG ) was prepared by a quasi-isostatic pressure process. After densification by MCMBs with average particle sizes of 2, 10, and 16 μm, the pore diameter of A3-3 decreased from 924 nm to 484 nm, 532 nm, and 778 nm, respectively. Through scanning electron microscopy, the cross-section energy spectrum and time-of-flight secondary ion mass spectrometry, resistance levels of the matrix graphite to molten salt infiltration were analyzed. The results demonstrate that adding a certain proportion of MCMB powders can improve the anti-infiltration ability of A3-3. Meanwhile, the closer the particle size of MCMB is to the pore diameter of A3-3, the smaller the average pore diameter of MDG and the greater the densification. As a matrix graphite of fuel elements in MSR was involved, the thermal and mechanical properties of matrix graphite MDG were also studied. When densified by the MCMB matrix graphite, MDGs can meet the molten salt anti-infiltration requirements for MSR operation. |
| Databáze: | OpenAIRE |
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