Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization
The downward discharge of the molten fuel to the lower structure of the fuel assembly could increase of the pressure drop and degrade of coolability of the assembly. To analyze the phenomena, experiments for the generation of the debris bed were conducted as LOF-DT series. Based on the debris bed in...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-01-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573321004149 |
| _version_ | 1798014933368045568 |
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| author | Min Ho Lee Dong Wook Jerng In Cheol Bang |
| author_facet | Min Ho Lee Dong Wook Jerng In Cheol Bang |
| author_sort | Min Ho Lee |
| collection | DOAJ |
| description | The downward discharge of the molten fuel to the lower structure of the fuel assembly could increase of the pressure drop and degrade of coolability of the assembly. To analyze the phenomena, experiments for the generation of the debris bed were conducted as LOF-DT series. Based on the debris bed in the LOF-DT, pressure drop experiment was conducted with intact and blocked component. Parametric study on the pressure drop was conducted by CFD. The LOF-DT experiments were conducted for the position and porosity of the debris bed. 85% of the debris were sedimented in the lower reflector, and 15% were in the nose piece, approximately. Porosity of the debris bed were about 0.7 and 0.85 in the lower reflector and nose piece, respectively. Pressure drop increased significantly with debris bed, especially in the lower reflector. More than 120 time of the pressure drop increased in the lower reflector, while only 10% increased in the nose piece. According to the parametric study, mass of the debris was the most important for pressure drop. The lower discharge phenomena could have a significant effect to the total pressure drop of the fuel assembly, approximately 10.8 times for the base case. |
| first_indexed | 2024-04-11T15:25:11Z |
| format | Article |
| id | doaj.art-e0f77cd908174f9581396e0f5fff76f4 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-11T15:25:11Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-e0f77cd908174f9581396e0f5fff76f42022-12-22T04:16:16ZengElsevierNuclear Engineering and Technology1738-57332022-01-01541117129Study on blockage after downward discharge of the molten metallic fuel with radiographic visualizationMin Ho Lee0Dong Wook Jerng1In Cheol Bang2Department of Nuclear Engineering Ulsan National Institute of Science and Technology (UNIST) 50 UNIST-gil, Ulju-gun, Ulsan, 44919, Republic of KoreaSchool of Energy Systems Engineering Chung Ang Univ. Rep. of Korea 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea; Corresponding author.Department of Nuclear Engineering Ulsan National Institute of Science and Technology (UNIST) 50 UNIST-gil, Ulju-gun, Ulsan, 44919, Republic of Korea; Corresponding author.The downward discharge of the molten fuel to the lower structure of the fuel assembly could increase of the pressure drop and degrade of coolability of the assembly. To analyze the phenomena, experiments for the generation of the debris bed were conducted as LOF-DT series. Based on the debris bed in the LOF-DT, pressure drop experiment was conducted with intact and blocked component. Parametric study on the pressure drop was conducted by CFD. The LOF-DT experiments were conducted for the position and porosity of the debris bed. 85% of the debris were sedimented in the lower reflector, and 15% were in the nose piece, approximately. Porosity of the debris bed were about 0.7 and 0.85 in the lower reflector and nose piece, respectively. Pressure drop increased significantly with debris bed, especially in the lower reflector. More than 120 time of the pressure drop increased in the lower reflector, while only 10% increased in the nose piece. According to the parametric study, mass of the debris was the most important for pressure drop. The lower discharge phenomena could have a significant effect to the total pressure drop of the fuel assembly, approximately 10.8 times for the base case.http://www.sciencedirect.com/science/article/pii/S1738573321004149SFRHypothetical core disruptive accident (HCDA)Lower dischargeLower structurePressure dropCoolability |
| spellingShingle | Min Ho Lee Dong Wook Jerng In Cheol Bang Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization Nuclear Engineering and Technology SFR Hypothetical core disruptive accident (HCDA) Lower discharge Lower structure Pressure drop Coolability |
| title | Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization |
| title_full | Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization |
| title_fullStr | Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization |
| title_full_unstemmed | Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization |
| title_short | Study on blockage after downward discharge of the molten metallic fuel with radiographic visualization |
| title_sort | study on blockage after downward discharge of the molten metallic fuel with radiographic visualization |
| topic | SFR Hypothetical core disruptive accident (HCDA) Lower discharge Lower structure Pressure drop Coolability |
| url | http://www.sciencedirect.com/science/article/pii/S1738573321004149 |
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