Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering
Accident tolerant fuel can improve the safety of nuclear reactor core and strengthen the ability of nuclear reactor to withstand serious accidents. Coated particle dispersed fuel has become a hot research topic in accident tolerant fuel in recent years, due to its high thermal conductivity and good...
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| Format: | Article |
| Language: | English |
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Editorial Board of Atomic Energy Science and Technology
2023-09-01
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| Series: | Yuanzineng kexue jishu |
| Subjects: | |
| Online Access: | https://www.aest.org.cn/CN/10.7538/yzk.2023.youxian.0210 |
| _version_ | 1797676981549006848 |
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| author | LIU Wei;SHAO Zongyi;LIU Wentao;MENG Ying;FENG Shuaishuai;CAI Zhenfang |
| author_facet | LIU Wei;SHAO Zongyi;LIU Wentao;MENG Ying;FENG Shuaishuai;CAI Zhenfang |
| author_sort | LIU Wei;SHAO Zongyi;LIU Wentao;MENG Ying;FENG Shuaishuai;CAI Zhenfang |
| collection | DOAJ |
| description | Accident tolerant fuel can improve the safety of nuclear reactor core and strengthen the ability of nuclear reactor to withstand serious accidents. Coated particle dispersed fuel has become a hot research topic in accident tolerant fuel in recent years, due to its high thermal conductivity and good radiation resistance stability. Coated particle dispersed fuel consists of threedimensional isotropic coated particles as the fuel phase and silicon carbide as the matrix phase, adopting the fuel form of coated particle dispersed in the silicon carbide matrix. However, due to the low selfdiffusion rate of SiC, it is difficult to achieve high densification by solid phase sintering, which is only controlled by diffusion. The existing sintering process mainly involves adding sintering aids or generating liquid glass phase to assist in the sintering of SiC powder. Spark plasma sintering (SPS) process can activate powder particles and promote sintering, and has been widely used in nuclear ceramic sintering in recent years. This article used SPS to prepare coated particle dispersed fuel pellets, and studied the influence of sintering process parameters on the density of the coated particle dispersed fuel pellets, such as the amount of sintering additive addition, maximum sintering temperature, maximum sintering pressure, and holding time. It is found that the best process parameters for SPS sintering of coated particle dispersed fuel pellet is 7% of sintering additive addition, holding 15 minutes at 1 850 ℃ and 45 MPa. Under such process parameter, the relative density of pellet can reach 98.5% of theoretical density. In addition, the sintering mechanism of coated particle dispersed fuel was studied and it is found that the sintering of coated particle dispersed fuel can be divided into five stages. Phase detection, metallographic detection and microstructure characterization analysis of the coated particle dispersed fuel pellets were carried out. The XRD examination results indicate that after sintering, the coated particle dispersed fuel pellet is pure β phase, which indicate that SPS rapid sintering can better control the phase transition. The metallographic examination results indicate that there is no obvious contact between TRISO particles in the coated particle dispersed fuel pellet obtained under the optimal process conditions. The SEM examination results show that the overall integrity of TRISO particles is good, indicating that the structure of TRISO particles dose not break during the sintering process. In the thermal shock test, there are no penetrating micro-cracks on the surface of the fuel pellet after a thermal shock, which maintain good integrity. |
| first_indexed | 2024-03-11T22:38:19Z |
| format | Article |
| id | doaj.art-d363acc210534cc8ba4c6f2ab6b91e3d |
| institution | Directory Open Access Journal |
| issn | 1000-6931 |
| language | English |
| last_indexed | 2024-03-11T22:38:19Z |
| publishDate | 2023-09-01 |
| publisher | Editorial Board of Atomic Energy Science and Technology |
| record_format | Article |
| series | Yuanzineng kexue jishu |
| spelling | doaj.art-d363acc210534cc8ba4c6f2ab6b91e3d2023-09-22T11:57:38ZengEditorial Board of Atomic Energy Science and TechnologyYuanzineng kexue jishu1000-69312023-09-0157918101816Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma SinteringLIU Wei;SHAO Zongyi;LIU Wentao;MENG Ying;FENG Shuaishuai;CAI Zhenfang0CNNC Key Laboratory of Fabrication Technology of Reactor Irradiation Special Elements, Baotou 014035, China; China North Nuclear Fuel Co., Ltd., Baotou 014035, ChinaAccident tolerant fuel can improve the safety of nuclear reactor core and strengthen the ability of nuclear reactor to withstand serious accidents. Coated particle dispersed fuel has become a hot research topic in accident tolerant fuel in recent years, due to its high thermal conductivity and good radiation resistance stability. Coated particle dispersed fuel consists of threedimensional isotropic coated particles as the fuel phase and silicon carbide as the matrix phase, adopting the fuel form of coated particle dispersed in the silicon carbide matrix. However, due to the low selfdiffusion rate of SiC, it is difficult to achieve high densification by solid phase sintering, which is only controlled by diffusion. The existing sintering process mainly involves adding sintering aids or generating liquid glass phase to assist in the sintering of SiC powder. Spark plasma sintering (SPS) process can activate powder particles and promote sintering, and has been widely used in nuclear ceramic sintering in recent years. This article used SPS to prepare coated particle dispersed fuel pellets, and studied the influence of sintering process parameters on the density of the coated particle dispersed fuel pellets, such as the amount of sintering additive addition, maximum sintering temperature, maximum sintering pressure, and holding time. It is found that the best process parameters for SPS sintering of coated particle dispersed fuel pellet is 7% of sintering additive addition, holding 15 minutes at 1 850 ℃ and 45 MPa. Under such process parameter, the relative density of pellet can reach 98.5% of theoretical density. In addition, the sintering mechanism of coated particle dispersed fuel was studied and it is found that the sintering of coated particle dispersed fuel can be divided into five stages. Phase detection, metallographic detection and microstructure characterization analysis of the coated particle dispersed fuel pellets were carried out. The XRD examination results indicate that after sintering, the coated particle dispersed fuel pellet is pure β phase, which indicate that SPS rapid sintering can better control the phase transition. The metallographic examination results indicate that there is no obvious contact between TRISO particles in the coated particle dispersed fuel pellet obtained under the optimal process conditions. The SEM examination results show that the overall integrity of TRISO particles is good, indicating that the structure of TRISO particles dose not break during the sintering process. In the thermal shock test, there are no penetrating micro-cracks on the surface of the fuel pellet after a thermal shock, which maintain good integrity.https://www.aest.org.cn/CN/10.7538/yzk.2023.youxian.0210accident tolerant fuelcoated particle dispersed fuelspark plasma sintering |
| spellingShingle | LIU Wei;SHAO Zongyi;LIU Wentao;MENG Ying;FENG Shuaishuai;CAI Zhenfang Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering Yuanzineng kexue jishu accident tolerant fuel coated particle dispersed fuel spark plasma sintering |
| title | Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering |
| title_full | Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering |
| title_fullStr | Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering |
| title_full_unstemmed | Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering |
| title_short | Study on Performance of Coated Particle Dispersed Fuel Pellet Prepared by Spark Plasma Sintering |
| title_sort | study on performance of coated particle dispersed fuel pellet prepared by spark plasma sintering |
| topic | accident tolerant fuel coated particle dispersed fuel spark plasma sintering |
| url | https://www.aest.org.cn/CN/10.7538/yzk.2023.youxian.0210 |
| work_keys_str_mv | AT liuweishaozongyiliuwentaomengyingfengshuaishuaicaizhenfang studyonperformanceofcoatedparticledispersedfuelpelletpreparedbysparkplasmasintering |