Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR
In a high-temperature gas-cooled reactor, the integrity of tristructural-isotropic-(TRISO-) coated fuel particles ensures the safety of the reactor, especially in case of an air-ingress accident. The oxidation of TRISO particles with the outer layers of silicon carbide (SiC) was performed at tempera...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2020/6568987 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850120209875075072 |
|---|---|
| author | Fangcheng Cao De Zhang Qingjie Chen Hao Li Hongqing Wang |
| author_facet | Fangcheng Cao De Zhang Qingjie Chen Hao Li Hongqing Wang |
| author_sort | Fangcheng Cao |
| collection | DOAJ |
| description | In a high-temperature gas-cooled reactor, the integrity of tristructural-isotropic-(TRISO-) coated fuel particles ensures the safety of the reactor, especially in case of an air-ingress accident. The oxidation of TRISO particles with the outer layers of silicon carbide (SiC) was performed at temperatures of 900°C–1400°C in air environment. Both the microstructure and phase composition of the SiC layers were studied. The results showed that the SiC layers had a good oxidation resistance below 1100°C. However, the amorphous silica on the SiC layers formed at 1200°C and gradually crystallized at 1400°C with the presence of microcracks. The reaction rates of the SiC layers were determined by measuring the silica thickness. It was proposed that the oxidation of the SiC layers followed the linear-parabolic law with the activation energy of 146 ± 5 kJ/mol. The rate-determining step of the oxidation was the diffusion of oxygen in silica. |
| format | Article |
| id | doaj-art-68c62aeeb7d14232a6a64305fe7bd500 |
| institution | OA Journals |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-68c62aeeb7d14232a6a64305fe7bd5002025-08-20T02:35:25ZengWileyJournal of Chemistry2090-90632090-90712020-01-01202010.1155/2020/65689876568987Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGRFangcheng Cao0De Zhang1Qingjie Chen2Hao Li3Hongqing Wang4School of Chemistry and Chemical Engineering, University of South China, Hengyang Hunan 421001, ChinaCooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang Hunan 421001, ChinaSchool of Chemistry and Chemical Engineering, University of South China, Hengyang Hunan 421001, ChinaSchool of Chemistry and Chemical Engineering, University of South China, Hengyang Hunan 421001, ChinaSchool of Chemistry and Chemical Engineering, University of South China, Hengyang Hunan 421001, ChinaIn a high-temperature gas-cooled reactor, the integrity of tristructural-isotropic-(TRISO-) coated fuel particles ensures the safety of the reactor, especially in case of an air-ingress accident. The oxidation of TRISO particles with the outer layers of silicon carbide (SiC) was performed at temperatures of 900°C–1400°C in air environment. Both the microstructure and phase composition of the SiC layers were studied. The results showed that the SiC layers had a good oxidation resistance below 1100°C. However, the amorphous silica on the SiC layers formed at 1200°C and gradually crystallized at 1400°C with the presence of microcracks. The reaction rates of the SiC layers were determined by measuring the silica thickness. It was proposed that the oxidation of the SiC layers followed the linear-parabolic law with the activation energy of 146 ± 5 kJ/mol. The rate-determining step of the oxidation was the diffusion of oxygen in silica.http://dx.doi.org/10.1155/2020/6568987 |
| spellingShingle | Fangcheng Cao De Zhang Qingjie Chen Hao Li Hongqing Wang Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR Journal of Chemistry |
| title | Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR |
| title_full | Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR |
| title_fullStr | Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR |
| title_full_unstemmed | Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR |
| title_short | Evaluation of Oxidation Performance of TRISO Fuel Particles for Postulated Air-Ingress Accident of HTGR |
| title_sort | evaluation of oxidation performance of triso fuel particles for postulated air ingress accident of htgr |
| url | http://dx.doi.org/10.1155/2020/6568987 |
| work_keys_str_mv | AT fangchengcao evaluationofoxidationperformanceoftrisofuelparticlesforpostulatedairingressaccidentofhtgr AT dezhang evaluationofoxidationperformanceoftrisofuelparticlesforpostulatedairingressaccidentofhtgr AT qingjiechen evaluationofoxidationperformanceoftrisofuelparticlesforpostulatedairingressaccidentofhtgr AT haoli evaluationofoxidationperformanceoftrisofuelparticlesforpostulatedairingressaccidentofhtgr AT hongqingwang evaluationofoxidationperformanceoftrisofuelparticlesforpostulatedairingressaccidentofhtgr |