Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors
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. Mesocarbon microbeads (MCMB) densified matrix graphite A3-3 (MDG) was prepared by a...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573320309116 |
| _version_ | 1818459452195471360 |
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| author | Haoran Wang Liujun Xu Yajuan Zhong Xiaoyun Li Hui Tang Feng Zhang Xu Yang Jun Lin Zhiyong Zhu Yan You Junqiang Lu Libing Zhu |
| author_facet | Haoran Wang Liujun Xu Yajuan Zhong Xiaoyun Li Hui Tang Feng Zhang Xu Yang Jun Lin Zhiyong Zhu Yan You Junqiang Lu Libing Zhu |
| author_sort | Haoran Wang |
| collection | DOAJ |
| description | 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. Mesocarbon microbeads (MCMB) densified matrix graphite 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. |
| first_indexed | 2024-12-14T23:14:34Z |
| format | Article |
| id | doaj.art-fd0fdcba49c84fb29109c0fd99da99ea |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-14T23:14:34Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-fd0fdcba49c84fb29109c0fd99da99ea2022-12-21T22:44:08ZengElsevierNuclear Engineering and Technology1738-57332021-05-0153515691579Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactorsHaoran Wang0Liujun Xu1Yajuan Zhong2Xiaoyun Li3Hui Tang4Feng Zhang5Xu Yang6Jun Lin7Zhiyong Zhu8Yan You9Junqiang Lu10Libing Zhu11Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, ChinaDepartment of Radiation Oncology, Zhongshan Hospital, Fudan University, Shanghai, 200032, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Wuwei Institute of New Energy, Wuwei, 733000, China; Corresponding author. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Wuwei Institute of New Energy, Wuwei, 733000, China; Corresponding author. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, ChinaShanghai Nuclear Engineering Research & Design Institute Co., Ltd., Shanghai, ChinaShanghai Nuclear Engineering Research & Design Institute Co., Ltd., Shanghai, ChinaShanghai Nuclear Engineering Research & Design Institute Co., Ltd., Shanghai, ChinaThis 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. Mesocarbon microbeads (MCMB) densified matrix graphite 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.http://www.sciencedirect.com/science/article/pii/S1738573320309116Molten salt reactorFuel elementMatrix graphiteMesocarbon microbead (MCMB)FLiBe infiltration |
| spellingShingle | Haoran Wang Liujun Xu Yajuan Zhong Xiaoyun Li Hui Tang Feng Zhang Xu Yang Jun Lin Zhiyong Zhu Yan You Junqiang Lu Libing Zhu Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors Nuclear Engineering and Technology Molten salt reactor Fuel element Matrix graphite Mesocarbon microbead (MCMB) FLiBe infiltration |
| title | Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors |
| title_full | Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors |
| title_fullStr | Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors |
| title_full_unstemmed | Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors |
| title_short | Mesocarbon microbead densified matrix graphite A3-3 for fuel elements in molten salt reactors |
| title_sort | mesocarbon microbead densified matrix graphite a3 3 for fuel elements in molten salt reactors |
| topic | Molten salt reactor Fuel element Matrix graphite Mesocarbon microbead (MCMB) FLiBe infiltration |
| url | http://www.sciencedirect.com/science/article/pii/S1738573320309116 |
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